Chemistry High School
Answers
Answer 1
An electromagnetic wave's energy rose as its frequency increased.
Electromagnetic wave -
In terms of science, electromagnetic radiation is made up of electromagnetic field waves that travel over space while carrying electromagnetic radiant energy and momentum.
It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves. Since the electric and magnetic fields are oscillating, the waves of energy are known as electromagnetic (EM).
They are categorised by scientists based on their frequency or wavelength, from high frequency to low frequency (short to long wavelength).
The following details must to be taken into account:
The energy should increase as the electromagnetic wave does.
All of this calls for a reduction in speed and wavelength.
Therefore, we can draw the conclusion that an electromagnetic wave's energy rose as its frequency increased.
To learn more about electromagnetic wave from given link
https://brainly.com/question/9854574
#SPJ4
Related Questions
Determine whether each item is a formed element or part of the plasma Neutrophils (54- 62%) Proteins (7%) Vitamins Eosinophils (1- 3%) Lymphocytes (25-33%) Red blood cells (95.1%) Wastos Electrolytes White blood cells (0.1%) Basophils (Less than 1%) Nutrients Monocytes (3- 996) Gases Hormones Water (92%) Platelets (4.8%) Formed element Reset
Answers
The list of items formed whether naturally or part of plasma is:
Neutrophils: formed element
Proteins: part of plasma
Vitamins: part of plasma
Eosinophils: formed element
Lymphocytes: formed element
Red blood cells: formed element
Wastes: part of plasma
Electrolytes: part of plasma
White blood cells: formed element
Basophils: formed element
Nutrients: part of plasma
Monocytes: formed element
Gases: part of plasma
Hormones: part of plasma
Water: part of plasma
Platelets: formed element
Electrolytes are substances that dissolve in water and become charged particles (ions) that can conduct electricity. They are present in the plasma and play important roles in maintaining fluid balance, acid-base balance, and nerve and muscle function.
Examples of electrolytes include sodium, potassium, calcium, magnesium, and chloride.
To know more about electrolytes refer to:
brainly.com/question/29771118
#SPJ4
The building block of all elements and the smallest component into which an element can be divided called?
Answers
The building block of all the elements and the smallest component into which an element can be divided is called as an atom.
An atom is the smallest part or the component into which the elements can be divided. Atom is the building block of the matter. The basic particles that an atom made up of are electrons, protons, and the neutrons.
The example is : An electron of a hydrogen atom will behave similar as the electron of an oxygen atom. Electron is the sub atomic particle of an atom and it cannot retain its chemical properties.
Thus , atom is the building block of all the elements.
To learn more about elements here
https://brainly.com/question/14347616
#SPJ4
will give brainliest
Where are all the noble gases found in the periodic table?
A. Period 1 B. Period 7 C. Group 1 D. Group 18
Answers
All the noble gases are found in Group 18 of the periodic table. Hence, Option D is the correct answer
The noble gases are a group of elements found in the periodic table. They are characterized by their stability and low reactivity. The noble gases are helium, neon, argon, krypton, xenon, and radon. All these elements are located in the same group in the Periodic Table, Group 18, also known as the "inert gases" group. They are located on the far right-hand side of the table, and they have the highest electron configurations, which makes them chemically unreactive.
In summary, the noble gases are found in Group 18 of the periodic table and they are helium, neon, argon, krypton, xenon, and radon.
Learn more about periodic table,
https://brainly.com/question/15987580
True or False: If you have two different isotopes, like Chlorine-35 and Chlorine-37, they have the same number of neutrons
True
False
Answers
Answer:
I believe the answer is True
Explanation:
I could be wrong but in order for Chlorine 35 and Chlorine 37 to be different would they have to have a different amount of electrons? I am sorry if this is wrong. I took Chemistry a few years ago.
Answer:
The number after the name 'chlorine' is called the mass number. The mass number is a tally of the number of protons and the number of neutrons in an atom's nucleus. Since all atoms of chlorine contain 17 protons, chlorine-35 and chlorine-37 differ in the number of neutrons each one has.
Explanation:
So its true lol
:)
Write the subatomic particles in the order that they were discovered. Do not include commas
Answers
Answer:
This is atimeline of subatomic particle discoveries, including all particles thus far discovered which appear to beelementary(that is, indivisible) given the best available evidence. It also includes the discovery ofcomposite particlesandantiparticlesthat were of particular historical importance.
More specifically, the inclusion criteria are:
Elementary particles from theStandard Modelofparticle physicsthat have so far been observed. The Standard Model is the most comprehensive existing model of particle behavior. All Standard Model particles including theHiggs bosonhave been verified, and all other observed particles are combinations of two or more Standard Model particles.
Antiparticles which were historically important to the development of particle physics, specifically thepositronandantiproton. The discovery of these particles required very different experimental methods from that of their ordinary matter counterparts, and provided evidence thatallparticles had antiparticles—an idea that is fundamental toquantum field theory, the modern mathematical framework for particle physics. In the case of most subsequent particle discoveries, the particle and its anti-particle were discovered essentially simultaneously.
Composite particles which were the first particle discovered containing a particular elementary constituent, or whose discovery was critical to the understanding of particle physics.
Is CH3 nonpolar covalent?.
Answers
Methane creates a covalent bond that is non-polar. This is due to the fact that there is almost any distinction between the electronegativity of carbon and hydrogen.
Because the electronegativities of the C and H are comparable when we simply consider CH₃, we declare it to be non-polar. As a result, they cancel one another, making CH₃ non-polar.
A methyl anion, the [CH₃-] group, has covalent connections between its carbon and hydrogen atoms. Although a C-H bond has no bond polarity, the anion has molecular polarity because of the negative charge attached to carbon.
Methane creates a covalent bond that is non-polar.
To know more about Polar molecule, visit,
https://brainly.com/question/29144393
#SPJ4
the term _______________ is derived from the fact that most compounds of this chemical class are synthesized from the combination of carbon and water.
Answers
Since the majority of the molecules in this chemical class are created by combining carbon and water, the term "carbohydrate" derives from this.
Which type of microorganism has its own domain?
Only the domain Eukarya contains multicellular, visible organisms like humans, animals, plants, and trees. Many microorganisms, including fungi, algae, and micro-animals, inhabit this region as well. Viruses are nonliving agents, hence they are excluded from the major categories of microorganisms. Single-celled or multicellular eukaryotic creatures are both possible.
There are three domains: Archaea, Bacteria, and Eukarya. Prokaryotic organisms fall under the domains Archaea or Bacteria, while eukaryotic organisms fall under the category Eukarya. Archaea. In terms of size and structure, archaea resemble bacteria but have a greater range of cell forms.A domain, also known as a dominion, superkingdom, realm, or empire, is the highest taxonomic rank that may be assigned to an entire group of organisms in biological taxonomy.
To learn more about carbohydrate refer to :
https://brainly.com/question/797978
#SPJ4
The synthesis of complex molecules _______ energy, whereas their degradation _______ energy. the synthesis of complex molecules occurs with _______ in entropy.
Answers
The synthesis of complex molecules is endergonic energy, whereas their degradation is exergonic energy. The synthesis of complex molecules occurs with a decrease in entropy.
The production of complex molecules requires the input of energy, which is known as endergonic energy.
This energy fuels the process of creating the molecules and can be supplied by a variety of sources, such as chemical reactions or solar energy.
On the other hand, the degradation of complex molecules produces energy, known as exergonic energy. During the synthesis of complex molecules, entropy decreases as the molecules become more ordered and structured.
The creation of complex molecules requires energy, known as endergonic energy.
The energy to break down complex molecules, on the other hand, is released in the form of exergonic energy.
This is because the synthesis of complex molecules leads to a decrease in entropy.
To learn more about entropy, click here:
https://brainly.com/question/13146879
#SPJ4
what would be the number of oxygen atoms in 5.00 moles of co2?
Answers
The number of oxygen atoms in 5.00 moles of carbon dioxide ([tex]CO_{2}[/tex]) is 30.00 moles.
This is because the molecular weight of [tex]CO_{2}[/tex] is 44.01 g/mol, and it contains one carbon atom and two oxygen atoms.
To calculate the number of oxygen atoms, we need to take the molar mass of [tex]CO_{2}[/tex] (44.01 g/mol) and divide it by the molar mass of oxygen (16.00 g/mol).
This gives us a ratio of 2.75 oxygen atoms to 1 carbon atom.
We then multiply this ratio by the number of moles of [tex]CO_{2}[/tex] (5.00 moles), to get the number of oxygen atoms, which is 30.00 moles.
To learn more about moles, click here:
https://brainly.com/question/26416088
#SPJ4
what is the difference between organic and inorganic chemistry?
Answers
Inorganic chemistry is the study of the remaining (i.e., non-carbon-containing) subset of chemicals, whereas organic chemistry is defined as the study of molecules containing carbon.
The characteristics and behaviour of inorganic compounds, which include metals, minerals, and organometallic compounds, are the focus of inorganic chemistry. Chemistry that does not have a carbon-hydrogen link, such as inorganic elements and compounds that are found naturally in the earth, is known as inorganic chemistry. Life cannot exist without inorganic substances like carbon dioxide, oxygen, minerals, and water. The study of carbon-containing molecules' structure, characteristics, content, reactions, and synthesis is known as organic chemistry. The majority of organic compounds are composed of carbon and hydrogen, however they can also contain a variety of additional elements (e.g., nitrogen, oxygen, halogens, phosphorus, silicon, sulfur).
learn more about organic chemistry here:
https://brainly.com/question/26088065
#SPJ4
Cuanto tiempo demorara un competidor en recorrer 500 metros planos, avanzando a 5 m/s
Answers
The length of time it takes a competitor to cover a distance of 500 meters flat, the speed at 5 m/s is 100 seconds.
Speed is a quantity that indicates how fast an object is moving. The International Unit of Speed is m/s
Distance is a number that indicates how far an object changes position. The international unit of distance is the meter (m).
Time is the interval between two states/events, or it can be the duration of an event. Unit of Time seconds or seconds (s).
How to calculate the travel time, namely the distance traveled divided by the speed.
t = s/v
Formula Description:
s = Distance traveled (m, km)
t = Travel time (hours, seconds)
v = Speed (km/h, m/s)
Then the time needed is
t = s/v
t = 500m/ 5m/s
t = 100 seconds
Learn more about calculating travel time at https://brainly.com/question/26046491
#SPJ4
which size of micropipette would you select to deliver 215 microliters?
Answers
A micropipette of size P1000 (can read upto 1ml) would be required or selected to deliver or transfer 215 microliters of liquid.
A micropipette is an instrument used to transfer small amounts (<= 1 ml) of liquids. The scales on a micropipette are in microliters (1000µl = 1 ml). These are very delicate and expensive instruments costing between $150-300 a piece. These instruments come in three sizes which are capable of pipetting three ranges of volumes:
P20 type can transfer liquids between the range of 5- 20 µl,
P200 type can transfer liquids between the range of 20-200 µl, and
P1000 type can transfer liquids between the range of 200-1000 µl.
These instruments are used in conjunction/simultaneously with disposable and often sterile plastic tips.
A fixed volume micropipette is a pre-set instrument to measure only a specific volume. Although the volume transferred/delivered by a given pipet cannot be changed, this pipet is operated analogously to the variable micropipette. A fixed volume micropipette often does not have a tip ejector button, so the tips are to be removed manually while the required steps of the process.
It is of utmost importance to use the correct pipettor available for the volume that is to be dispensed. As going below or above the range provided for a micropipette, may damage the instrument.
Thus, a micropipette of type P1000 only should be used to deliver any liquid of volume 215 microliters.
Learn more about micropipette here:
https://brainly.com/question/23793716
#SPJ4
PRACTICE Problems
Predict whether the following single-replacement reactions will occur. If a reaction occurs,
write a balanced equation for the reaction.
21. K(s) + ZnCl₂(aq) →→→
Answers
Single-replacement reactions will occur if the reaction below occurs
K(s) + ZnCl₂(aq) →→→ KCl₂ + Zn.
What is Single-replacement reaction?
This is also referred to as single displacement reaction and it is referred to as a reaction in which one element is substituted for another element in a chemical reaction.
Single-replacement reactions will occur in the reaction below because it follows and obeys this condition which is:
A + BX ⇒ B + AX
K(s) + ZnCl₂(aq) →→→ KCl₂ + Zn.
Here we can deduce that zinc was substituted which is therefore the reason why it was chosen as the correct choice in this scenario.
Read more about Single-replacement reactions here https://brainly.com/question/7959057
#SPJ1
How many molecules are in 11. 5 mol of H2O?.
Answers
There are 6.9253 x10²⁴ molecules in 11. 5 mol of H₂O
The total number of atoms or molecules in a sample can be calculated by multiplying the number of moles by the Avogadro constant. The formula is as follows:
number of molecule= moles x avogadro's number
One mole of material has 6.022x10² atoms, and equivalent volumes of various gases measured under the same conditions of temperature and pressure contain the same number of molecules.
number of molecule= moles x avogadro's number
number of molecule= 11. 5 mol x 6.022x10²³
number of molecule= 6.9253 x10²⁴
Therefore, there are 6.9253 x10²⁴ moleculesin 11. 5 mol of H₂O
Learn more about number of molecule at brainly.com/question/29769911
#SPJ4
A general formula for a double-displacement reaction is written as:
Answers
General formula of double displacement reaction is:
AB + CD = AD + BC where AB and CD are the displaced reactants.
A double displacement reaction occurs when two reactants exchange ions to form two new compounds. Double displacement reactions usually result in the formation of a precipitate as a product.
Precipitate is typically formed as a result of a double displacement reaction.
The two types of bonds that exist between the reactants can be covalent on ionic in nature.
The other name for a double displacement reaction is salt metathesis reaction. It is an exchange reaction, or we can say a double decomposition reaction when one or more of the reactants does not dissolve in the solvent.
The simplest way to identify a double displacement reaction is to see if the cations exchanged anions with each other. If the states of matter are mentioned, look for aqueous reactants and the formation of a single solid product.
Learn more about displacement reactions here:
https://brainly.com/question/29794138
#SPJ4
in complementary base pairing bonds with and bonds with
Answers
The two strands of DNA are held together by hydrogen bonds.
What is chemical bond?
A chemical bond is an attraction between two atoms or ions that allows the formation of chemical substances. Chemical bonds are formed when the atoms share or transfer electrons in order to obtain a full outer shell of electrons, achieving a more stable electron configuration. This can happen through covalent bonds, ionic bonds, hydrogen bonds, and other types of bonds. Chemical bonds are responsible for the stability of molecules and are responsible for many of the physical and chemical properties of substances.
These hydrogen bonds form between the nitrogenous bases of the two strands of DNA. Adenine (A) on one strand always bonds with thymine (T) on the other, and cytosine (C) always bonds with guanine (G). This highly specific arrangement of base pairs is essential for the replication and transcription of genetic information.
To know more about chemical bond click-
https://brainly.com/question/819068
#SPJ4
A sample of gas has a volume of 2.0 L at a temperature of 0°C. When the volume is
increased to 4.0 L at constant pressure, what is the new temperature?
Answers
This is an illustration of Boyle's law, which states that when mass and temperatures are held constant, a gas's volume changes inversely with pressure at 0.05 atm.
What is the fundamental idea behind Boyle's law?
According to Boyle's law, pressure and volume of a gas are always inverse proportion at a specific temperature. It states that the pressure inside the lung will drop as the size of the lungs expands during inhalation.
Which scenario best illustrates Boyle's Law?
When you inflate your bicycle tires, you can see how Boyle's Law is used in practice. The gasses inside a tire are squeezed and crammed closer together when air is pumped into it. This raises the gas's pressure, and It starts to press up against the tire walls.
To know more about Boyles law visit:
https://brainly.com/question/1437490
#SPJ1
According to the law of conservation of mass, which statement about chemical reactions is always true?(1 point)
Responses
The number of molecules in the reactants is the same as the number of molecules in the products.
The number of molecules in the reactants is the same as the number of molecules in the products.
The number of substances in the reactants is the same as the number substances in the products.
The number of substances in the reactants is the same as the number substances in the products.
The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products.
The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products.
The states of the substances in the reactants is the same as the states of the substances in the products.
Answers
According to the law of conservation of mass, Statement A. The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products is true about chemical reactions.
What is the law of conservation of mass?
The law of conservation of mass is a model indicating that matter cannot be created or destroyed, but it can be changed from one form to another.
Therefore, with this data, we can see that the law of conservation of mass indicates that the total mass of the system or number of atoms remains constant over time.
Learn more about the law of conservation of mass here:
https://brainly.com/question/1992248
#SPJ1
Is HF a nonpolar covalent bond?.
Answers
HF is a polar covalent bond. The difference in electronegativity between hydrogen and fluorine causes the electrons in the bond to be unevenly distributed, resulting in a partial positive charge on the hydrogen atom and a partial negative charge on the fluorine atom.
This creates a polar bond rather than a nonpolar covalent bond. In a nonpolar covalent bond, the electrons are shared equally between the two atoms, resulting in no net dipole (separation of charge).
However, in a polar covalent bond, the electrons are not shared equally, resulting in a net dipole. The difference in electronegativity between the atoms causes one atom to have a stronger attraction for the electrons than the other, resulting in a partial positive charge on one atom and a partial negative charge on the other.
In the case of the HF molecule, the fluorine atom has a much higher electronegativity than the hydrogen atom.
As a result, the electron cloud is pulled more towards the fluorine atom, leaving the hydrogen atom with a partial positive charge (+) and the fluorine atom with a partial negative charge (-). This creates a polar bond with a net dipole moment, meaning that the molecule has a positive and a negative pole.
It is also important to mention that the polar nature of a covalent bond can also be determined by the molecular geometry.
The bond dipole moment is determined by the vector difference of the charges and the distance between them, so the bond dipole moment is zero in a symmetrical molecule but not in an asymmetrical one.
Learn more about covalent bond:
https://brainly.com/question/9833711
#SPJ4
How many chlorine atoms does 7.30 g sample of iron (II) chloride contain? MM FeCl2= 126.8 g/mol
Answers
To determine how many chlorine atoms are present in a 7.30 g sample of iron(II) chloride (FeCl2), you can use the molar mass of FeCl2 and the given mass of the sample.
First, you need to convert the mass of the sample from grams to moles using the molar mass of FeCl2:
mass (g) / molar mass (g/mol) = moles
7.30 g / 126.8 g/mol = 0.0578 moles
Iron(II) chloride is composed of one atom of Iron and two atoms of chlorine, so for every 1 mole of FeCl2, there are 2 moles of chlorine atoms.
To find the number of chlorine atoms in the sample, we need to multiply the number of moles of FeCl2 by the number of chlorine atoms per mole:
moles of FeCl2 x (number of chlorine atoms / 1 mole of FeCl2) = moles of chlorine atoms
0.0578 moles x 2 = 0.1156 moles
To convert moles of chlorine atoms to the number of atoms, we need to multiply by Avogadro's number which is 6.022 x 10^23 atoms/mol
0.1156 moles x 6.022 x 10^23 atoms/mol = 6.93 x 10^22 atoms of chlorine.
So 7.30 g sample of iron (II) chloride contains 6.93 x 10^22 atoms of chlorine.
Learn more about Avogadro's number here: https://brainly.com/question/24175158
#SPJ4
How many molecules are in 1.2 moles of H₂O?
Answers
7.226 x 10^33 molecules.
Explanation:
• A compound is a substance that is made by two or more atoms from different elements.
• A mole of a compound contains a number of molecules equivalent to Avogadro's number, 6.022 × 10^23.
• That is, one mole of a compound contains 6.022 × 10^23 molecules.
In this case we are given;
Number of moles of H2O as 1.2 moles
But, 1 mole of H2O contains 6.022 × 10^23 molecules.
We are required to calculate the number of molecules present;
• To calculate the number of molecules we are going to multiply the number of molecules in one mole by the number of moles.
• Therefore;
Number of molecules = 1.2 moles × 6.022 × 10^23 molecules/mole
= 7.226 × 10^23 molecules.
Thus, 1.2 moles of water contains 7.226 × 10^23 molecules.
There are 7.2 x 10^23 molecules of H2O in 1.2 moles.
Oxides of active metals, such as CaO, react with water to produce...A) Metal CarbonatesB) Metal HydridesC) Metal HydroxidesD) Acids
Answers
The correct answer is Metal Hydroxides
What are metal hydroxides?
Metal hydroxides are metal hydroxides.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.
To know more about metal hydroxides, click the link given below:
https://brainly.com/question/11170180
#SPJ4
What popular fast food chain encouraged customers to think outside the bun?
Answers
The popular fast food chain encouraged customers to "think outside the bun" is taco bell.
Taco bell has long entertained fast-food fans with catchy slogans like "Yo Quiero Taco Bell," "Think Outside the Bun," and "Live mas." Their slogan "Think Outside the Bun" is a play on the phrase "think outside the box," which means to be creative and innovative. With the majority of Taco Bell's competitors serving hamburgers (McDonald's, Burger King, etc.), Taco Bell encourages you to "think outside the (hamburger) bun" and indulge in their coveted Tex-Mex cuisine.
A fast food chain is a restaurant that offers quick, convenient meals at low prices. These restaurants typically serve a limited menu of burgers, fries, chicken, pizza, and other fried foods. Fast food restaurants are typically found in high-traffic areas such as near highways, shopping malls, and tourist attractions. These restaurants frequently use a "fast-food" model, in which customers order at a counter, pay for their meal, and then pick up their food when it is ready. Many fast food restaurants also provide drive-through services, allowing customers to order and receive their food without having to leave their vehicle. Fast food restaurants frequently provide delivery services, allowing customers to have their meals brought to their homes or workplaces.
Learn more about taco bell here: https://brainly.com/question/30279779
#SPJ4
A sample of chemical x is found to contain 5. 0 grams of oxygen, 10. 0 grams of carbon, and 20. 0 grams of nitrogen. The law of definite proportion would predict that a 70 gram sample of chemical x should contain how many grams of carbon?.
Answers
17 grams of carbon should be present in a 61-gram sample of chemical x.
The law of definite proportions, also known as Proust's law or the law of constant composition, is a principle in chemistry that asserts a chemical compound will always contain its constituent components in a fixed ratio (by mass), regardless of its source or method of creation.
According to the law of definite proportion, regardless of quantity or source, the proportions of each element to its weight in a chemical combination will always be exactly the same value.
In the ensuing query:
The chemical X sample includes:
Oxygen content: 5.0 grams
One kilogram of carbon
• Nitrogen content: 20.0 grams
The compound's total mass is (10.0 + 5.0 + 20.0) g, which equals 35.0 g.
10/35 = 2/7 is the proportion of carbon in the compound.
As a result, the amount of carbon in 61 grammes of the sample is equal to 2/7 x 61, or 17.42 grams.
Therefore, we can infer that 17 grams of carbon should be present in a 61-gram sample of chemical x.
To learn more about law of definite proportion from given link
https://brainly.com/question/11026166
#SPJ4
A solution was prepared by dissolving 105. 0 g of kcl in 215 g of water. What is the mole fraction of kcl in this solution?.
Answers
Moles fraction of KCl is 0.11mole.
What does Mole Fraction mean?
The mole fraction is the product of the number of molecules of a specific component in a mixture and its total molecular weight. It is a means to convey how concentrated a solution is. The number of moles of a particular component in the solution divided by the overall number of moles in the sample solution is known as the mole fraction.
The moles of KCl and water are calculated as 150g/74.6g/mol, or 2.01 moles.
water is equal to 295g/18g/mol, or 16.39 moles.
Calculate the total number of moles.
The KCl moles fraction is therefore 2.01 + 16.39 = 18.4 moles, which equals 0.11 moles.
To learn more about Mole fraction from given link
https://brainly.com/question/8444830
#SPJ4
compare the size of ions to the size of atoms from which they form
Answers
The negative ion is always significantly bigger than the atom it originated from. In actuality, the negative ion may be larger than the neutral atom by a factor of more than two.
Ions are defined as atoms that gain or lose electrons. When an atom receives or loses its outermost electron, its size (or radius) changes. This change is known as the ionic radius (s). A negatively charged ion known as an anion is created when an atom receives an extra electron, increasing its ionic radius. Positive ions are smaller than their parent atoms, whereas negative ions are bigger. Trend over a time period: Moving across the table from left to right causes the ionic radius to shrink. In any given period, negative ions are always bigger than positive ions.
learn more about atoms here:
https://brainly.com/question/13654549
#SPJ4
A buffer is made by dissolving HC2H3O2 and NaC2H3O2 In water.
a) Write an equation that shows how this buffer neutralise added acid
b) Write an equation that shows how this buffer neutralises added base
Answers
A buffer is made by dissolving HC₂H₃O₂ and NaC₂H₃O₂ In water. The equation that shows how this buffer neutralise acid added is
H⁺ + CH₃COO⁻ ⇄ CH₃COOH. The equation that shows how this buffer neutralises added base is H⁺ +OH⁻ ⇄ H₂O
Processes of dissociation in the solution containing weak CH₃COOH acid and its salt:
CH₃COOH ⇄ H⁺ + CH₃COO⁻ Ka = 1.8 X 10⁻⁵
CH₃COONa ⇄ Na⁺ + CH₃COO⁻
At addition of acid in solution ions of hydrogen comunicate in weak acid:
H⁺ + CH₃COO⁻ ⇄ CH₃COOH.
At addition of the basis in solution ions of hydroxide comunicate in weak electrolyte - water: H⁺ +OH⁻ ⇄ H₂O
Therefore, the equation that shows how this buffer neutralise acid added is H⁺ + CH₃COO⁻ ⇄ CH₃COOH. The equation that shows how this buffer neutralises base added is H⁺ +OH⁻ ⇄ H₂O
Learn more about buffer at https://brainly.com/question/17350370
#SPJ4
How would having too much sample in the melting point tube most likely affect a melting point measurement? The melting point will be lower than expected. The sample will thermally decompose.The melting point range will be broader than expected. The melting point range will be narrower than expected.
Answers
Putting too much sample in the melting point tube will likely result in a lower melting point value. as a result of the melting point temperature being lower than expected.
This is due to the fact that a sample with too much sample causes the heat to go down the tube more slowly, raising the measurement temperature and causing the sample to melt before it reaches its true melting point. Melting point is the temperature at which a substance changes state from a solid to a liquid (or, less frequently, liquefaction point). At the melting point, there is an equilibrium between the solid and liquid phases. A molecule is a collection of atoms with two or more bonded together by chemical bonds.
Learn more about chemical bonds here
https://brainly.com/question/12907148
#SPJ4
the maximum buffering effect of a weak acid occurs at.....?
Answers
When the ratio of weak acid and its salt in a buffer is equal to 1, it is said that the buffering capacity is maximum.
A buffer is made up of either a weak acid and its salt or a weak base and its salt.
The amount of acid or base that can be added to a given volume of a buffer solution before the pH changes significantly, usually by one unit, is referred to as the buffering capacity. Buffer capacity is determined by the amounts of weak acid and conjugate base present in a buffer mixture.
When NaOH is added to solutions containing varying concentrations of an acetic acid/sodium acetate buffer, the observed change in buffer pH is inversely proportional to the buffer concentration. If the buffer capacity is increased by tenfold, the buffer solution can absorb ten times the amount of strong acid or base previously.
Learn more about buffering capacity here:
https://brainly.com/question/24188850
#SPJ4
What is hydropower development?.
Answers
Answer:
Hydropower technologies generate power by using the elevation difference, created by a dam or diversion structure, of water flowing in on one side and out, far below, on the other.