Which of the statement below states the negative impact did chemistry have on society through the production and use of chlorofluorocarbons (CFCs)? A. Hazardous coolants in refrigeration units were replaced. B. Better refrigeration reduced loss of food through spoilage. C. Lower levels of ozone allowed more ultraviolet radiation to reach Earth. D. Fire safety improved through the use of fire extinguishers.

Answers

Answer 1

Answer: I think the correct answer from the choices listed above is option A. The statement that states a negative impact of chemistry on the society is that hazardous coolants in refrigeration units were replaced. One example of this coolant is the production and use of chlorofluorocarbons (CFCs) which replaced by more safer coolants.

Answer 2

Answer:

Answer:

C. Lower levels of ozone allowed more ultraviolet radiation to reach Earth.

Explanation:

got it right on edge 23

Related Questions

What is the volume of 2 mol of chlorine gas at STP?
A die is shaped like which solid?
A solution has which of the following properties
When the Sun’s radiant energy falls on Earth’s oceans, it causes water to change state by evaporating. Which form of energy does water vapor have?
In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 140 g of chlorine gas. Express the quantity in moles to three significant figures.

What is one benefit associated with a nuclear fission reaction?(1) The products are not radioactive.
(2) Stable isotopes are used as reactants.
(3) There is no chance of biological exposure.
(4) A large amount of energy is produced.

Answers

The correct answer is (4) A large amount of energy is produced in a nuclear fission reaction.
Choice (1) is false, the products are radioactive, and often have to be buried underground for long periods of time. Choice (2) is false, because the reactants are often unstable to allow them to decay and release energy. Choice (3) is false, because the radioactive substances can affect living organisms.

"A large amount of energy is produced" is by far the most associated with a nuclear fission reaction in terms of a benefit, in terms of making both power and bombs.

Write a balanced net ionic equation for the following reaction. Explain how you arrived at this answer. What did you cancel out?AgNO^3 (aq) + KCI (aq) ----> AgCI (s) + KNO^3 (aq)

Answers

The net ionic equation is

Ag⁺(aq) +Cl⁻(aq) → AgCl(s)

Explanation

AgNO₃ (aq) + KCl (aq)→ AgCl(s) +KNO₃(aq)

from above molecular equation break all soluble electrolyte into ions

Ag⁺(aq) +NO₃⁻ (aq) + K⁺(aq) +Cl⁻(aq) → AgCl (s) + K⁺(aq) + No₃⁻(aq)

cancel the spectator ions in both side of equation =K⁺ and NO₃⁻ ions

The net ionic equation is therefore

= Ag⁺(aq) + Cl⁻(aq) → AgCl(s)

element x has an electron configuration of 1s²2s²2p⁶3s¹, while element z has an electron configuration of 1s²2s²2p⁵. a) which element would have greater first ionization energy? b) which element would have a larger radius? c) which element would have higher electronegativity? d) which element would form an ion that has a larger radius? e) which element would release more energy when it gains an electron?

Answers

Answer:

a) Element Z will have a greater ionisation energy because it's outer electron is in a sub-shell closer to it's nucleus

b) Element X

c) Element z is fluorine which has the highest electronegativity of all elements so it's z

d)Element X

e) I would guess X but im not sure

Which type of radiation is identical in mass and charge to a helium nucleus?a. beta
b. alpha
c. proton
d. positron

Answers

The best answer to the question 'Which type of radiation is identical in mass and charge to a helium nucleus?' would be letter b. Alpha radiation is similar to the mass and charge to a helium nucleus. An alpha particle has two protons and two neutrons.

Answer:

The correct answer is b.

Explanation:

Alpha particles are fully ionized helium (4He) nucleus. These nucleus consist of two protons and two neutrons. They are positively charged (+2) due to the absence of electrons. It has the same mass as the He atom (6,64 * $10^(-27)$ kg) or (4 uma), and the same charge (3,2 * $10^(-19)$ C).

Have a nice day!

Is it possible for an object not to be in motion and still have force acting upon it?

Answers

yes,this is an example:
An apple is sitting on a desk he is not in motion but one of the forces acting upon it is gravitational pull because is not floating around, the earth gravitational pull is pulling it down to the earth's surface.

What are the electrons is the outer shell of an atom called?What charge will elements in Group 2 form when they are involved in an ionic bond?

Answers

The answer to your first question is valence electrons. The answer to your second is positive.

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