Answers
Related Questions
Identify the two functional groups that react together to form the ester linkage between monomers in the PET polymer
Answers
Answer:
PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.
In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.
It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.
Identify the following emission.
Answers
Mercury completes one orbit around the Sun in 68 days.
a. True
b. False
Answers
Answer:
true :PP
Explanation:
Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.87 × 10⁻³ at a certain temperature. If 5.00 g of solid PH₃BCl₃ and 0.0700 g of BCl₃ are added to a 4.500 L reaction vessel, what will the equilibrium concentration of PH₃ be? SO CONFUSED BE VERY SPECIFIC especially WITH FINDING Qc.
Answers
Answer:
[PH₃(g)] = 0.0432M at equilibrium
Explanation:
Given: PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³
*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.
PH₃BCl₃(s) => BCl₃(g) + PH₃(g
Ci: 5.00g 0.07g 0.00g
*≅1.0M(s) =0.07g/115.81g·mol⁻¹
= 6 x 10⁻⁶ mol
= 6 x 10⁻⁶mol/4.5L
= 1.3 x 10⁻⁴M = 0.00M
ΔC: -x +x +x
Ceq: 1M - x ≅ 1M = (1.3 x 10⁻⁴ + x)M = x
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³
=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³
=> x² + 1.3 x 10⁻⁴·x + 1.87 x 10⁻³ = 0
=> x = -b ± [Sqrt(b² - 4ac)] / 2a
=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)
=> x = 0.0432M in PH₃ at equilibrium
Check:
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)
China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D
Answers
Answer: the answer would be A
Explanation:
Answer:
A
Explanation:
The ____ are new substances that are created following a chemical reaction. *
A:chemical reactions
B:products
C:reactants
D:coefficients
Answers
Answer:
b
Explanation:
What does it mean when someone has done multiple trials? A. They have performed an experiment once and reported their findings. B. They have performed a scientific experiment more than once. C. They have performed an experiment that can only be performed once. D. They have designed an investigation to answer a question.
Answers
A. They have performed an experiment once and reported their findings.
Can anyone help me out with these questions? Thanks!!
Answers
Mercury may have ice trapped in the crater floors near the planet’s north pole.
a. True
b. False
Answers
What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61
Answers
Answer:
47 is your correct ans, which is b
What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? (5 points)
Oa
C₃H₂N
Oь
C2HAN
CHION
Ос
Od
C₂ H₂N
Answers
Please match word and definition < electrons and electric current move easily 1. electric current < Prevents electrons from moving 2. insulator flow of an electrical charge in a circuit 3. electric circuit 4. conductor provides a path for electrons to flow
Answers
Answer:
1st box:4
2nd box:2
3rd box:3
4th box:1
Explanation:
I am not 100% sure on this, but i am pretty confident that this is the answer! BUT If this is somehow wrong, please tell me so i can comment a better answer! :)
Due to property of conduction, conductor allows electrons and electric current to move easily,insulators prevent electric current from moving, electric current is the flow of an electrical charge in a circuit and electric circuit provides a path for electrons to flow.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
Learn more about conduction,here:
https://brainly.com/question/12136944
#SPJ5
What happens when a covalent
substance dissolves in water?
and Why doesn’t it conduct electricity?
Answers
Answer: Covalent compounds form when atoms that have similar electronegativity values form covalent chemical bonds. When a covalent compound dissolves in water, it does not dissociate into ions. Because there are no free electrons or ions in the water (electrolytes) dissolved covalent compounds can't conduct electricity.
Explanation:
dude. g o o g l e.
The compound with the molecular formula C4H10 is called
Answers
Answer:
butane
Explanation:
I hope this helps!
Answer:
Butane
...............
Why doesn't glue stick to the inside of the bottle? (Not sure if this is chemistry or not lol)
Answers
Answer:
When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.
Balance the following:
C₂ + B → B₂C₂
Ag₄ + SO₂ → AgO + S₂
Answers
Answer:
The balanced reactions are:
C₂ + 2B → B₂C₂
Ag₄ + 2SO₂ → 4AgO + S₂
Explanation:
The Law of Conservation of Matter postulates that "the mass is not created or destroyed, only transformed." This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends. In other words, then the mass before the chemical reaction is equal to the mass after the reaction.
In other words, the law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts .
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
You have:
C₂ + B → B₂C₂
Left side: 2 C and 1 B.
Right side: 2 C and 2 B.
Carbon C is balanced since you have the same amount of the element on each side of the reaction, but boron B is not balanced. So, balancing the reaction:
C₂ + 2B → B₂C₂
Left side: 2 C and 2 B.
Right side: 2 C and 2 B.
Now you have the same amount of each element on each side of the reaction, so the reaction is balanced.
Now you have:
Ag₄ + SO₂ → AgO + S₂
Left side: 4 Ag, 1 S and 2 O.
Right side: 1 Ag, 2 S and 1 O.
Balancing the Ag:
Ag₄ + SO₂ → 4AgO + S₂
Left side: 4 Ag, 1 S and 2 O.
Right side: 4 Ag, 2 S and 4 O.
Balancing the O:
Ag₄ + 2SO₂ → 4AgO + S₂
Left side: 4 Ag, 2 S and 4 O.
Right side: 4 Ag, 2 S and 4 O.
You have the same amount of each element on each side of the reaction, so the reaction is balanced.
Which of the following situations would cause light to refract?
Answers
When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.
What is refraction ?Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.
The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.
For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.
Find more on refraction:
https://brainly.com/question/29692290
#SPJ6.
The options of your question were as follows:
A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.
as i increase the amount of solute without changing the amount of solvent i increase the solutions....?
Answers
Answer:
concentration?
Explanation:
solute = The dissolved substance in a solution.
solvent = The liquid in which the solute dissolves to form a solution.
Answer:
the only marked thing was in new game for the quiz that link yes to be in a relationship
Explanation:
you followed a 1 or a 1 year of high.
____ describes the quantity of solute that
can dissolve in a given amount of solvent at a
given temperature.
A. Viscosity
B. Solubility
C. Fluidity
D. Permeability
Answers
B. Solubility
Answer:
B
Explanation:
what is the smallest division on 4 balance
Answers
Answer:0.1g
Explanation:
Answer: The smallest scale division is a tenth of a centimeter or 1 mm.
Explanation: I got this from a website but I hope it helps!
What is bonding all about in chemistry?
Answers
Answer:
It is like about a attraction between atoms, molecules, and more.
How many mL of 0.2860 M sulfuric acid are required to react with 58.42 mL of 0.09756 M iron(III) hydroxide
Answers
Answer:
0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.
Explanation:
The balanced reaction between tha surfuric acid and iron (III) hydroxide is:
Fe(OH)₃ + 3 H₂SO₄ → Fe(HSO₄)₃ + 3 H₂O
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactants and products participate in the reaction:
Fe(OH)₃: 1 mole H₂SO₄: 3 molesFe(HSO₄)₃: 1 mole H₂O: 3 molesBeing molarity (M) the number of moles of solute that are dissolved in a given volume:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
then the number of moles can be calculated as:
number of moles= molarity* volume
So, if 58.42 mL ( 0.05842 L) of 0.09756 M iron (III) hydroxide react, then it means that the number of moles that react are:
number of moles= 0.09756 M* 0.05842 L
number of moles= 0.005699 moles
Now it is possible to apply the following rule of three: if by stoichiometry 1 mole of Fe(OH) ₃ reacts with 3 moles of H₂SO₄, then 0.005699 moles of Fe(OH) ₃ with how many moles of H₂SO₄ does it react?
[tex]moles of H_{2} SO_{4} =\frac{0.005699 moles ofFe(OH)_{3}* 3moles of H_{2} SO_{4} }{1mole ofFe(OH)_{3}}[/tex]
moles of H₂SO₄= 0.017097
Being sulfuric acid 0.2860 M, it is replaced in the definition of molarity:
[tex]0.2860M=\frac{0.017097 moles}{volume}[/tex]
Solving for the volume:
[tex]volume=\frac{0.017097 moles}{0.2860 M}[/tex]
volume= 0.05978 mL
0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.
What best defines a population
Answers
Answer:
A number of organisms in a specific area/place
Explanation:
g (True/false)Sodium borohydride, NaBH4, is a reducing reagent which converts carbonyl to carboxylic acids
Answers
Answer:
False
Explanation:
Sodium borohydride, NaBH4 is a reducing agent. The conversion of a carbonyl to carboxylic acids is an oxidation reaction.
Sodium borohydride, NaBH4 does not perform an oxidation reaction, it is only used for reduction reactions. Hence the statement in the question is false.
Convert 3.52 × 10^22 atoms of gold to moles
Answers
Answer:
5.85 x 10⁻² mol Au
Explanation:
Divide the atoms of gold with Avogadro's number to find the solution.
What is Scientific definition of a compound?
Answers
A substance made up of atoms from two or more elements that are chemically bonded together
What will happen to the volume of a gas if the Kelvin temperature of the gas is reduced to 1/4 of the original temperature and the pressure of the gas is halved?
The volume of the gas will be 1/8 of the original volume.
The volume of the gas will remain the same.
The volume of the gas will be 1/6 of the original volume.
The volume of the gas will be half of the original volume.
Answers
Answer:
the volume of the gas will be 1/8 of the original value
Explanation:
How can you change a objects state of matter
Answers
Answer:
Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.
Explanation:
a sample contains 4.0x10^25 molecules of hydrogen peroxide (H2O2) how many hydrogen atoms would be in the sample?
Answers
The picture shows to containers filled with a gas, both initially at room temperature
AAA
Ice
Heat
Which statement is correct? (5 points)
The gas particles in both containers have the same average kinetic energy because they have equal number of particles
The gas particles in both containers have the same average kinetic energy because they have the same volume
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature
The average kinetic energy of the gas particles is greater in container 8 because its particles move faster
Od
Answers
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
Option D is the correct statement. From the excerpt, it can be seen that container B is being heated. The heat that is applied to container B will make the temperature of the gas to increase, thereby increasing the average kinetic energy. This will cause the gas molecules to mover faster and with force hitting the walls of the gas container. At this time, pressure should increase. Also, the volume of the gas increases just as the temperature of the gas also increases.
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation: