Where was Freon used prior to the ban on CFCs?

Answers

Answer 1

Answer:

Answer:

The majority of automobiles manufactured prior to 1994

Explanation:

their A/C systems. Since that time, several non-CFC refrigerants such as hydrofluorocarbons (HFCs) have been developed; and many more are in the development process

Related Questions

Each molecule of table sugar, C12H22O11, containsa. 0 atoms of carbon. c. 6 atoms of carbon. b. 1 atom of carbon. d. 12 atoms of carbon.
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Hey guy I have presentation tomorrow on sodium . Can u give me ideas how to present it. So that students feel joy and easily understand
Which of these elements has physical and chemical properties most similar to silicon (Si)?(1) germanium (Ge) (3) phosphorus (P) (2) lead (Pb) (4) chlorine (Cl)
For the reaction ?H2 +?O2 → ?H2O, what is the maximum amount of H2O (18.0153 g/mol) which could be formed from 9.43 g of H2 (2.01588 g/mol) and 12.98 g of O2 (31.9988 g/mol)? Answer in units of g.

A certain reaction is exothermic in the forward direction and has fewer molecules of gas on the product side. Which set of actions should be used to increase the yield of the products? Decrease the temperature and decrease the pressure. Increase the temperature and decrease the pressure. Decrease the temperature and increase the pressure. Increase the temperature and increase the pressure.

Answers

Answer: Option (c) is the correct answer.

Explanation:

According to Le Chatelier's principle, when a system is in equilibrium for a long time then it will change its concentration, temperature, volume or pressure to attain a new equilibrium that partly counteracts the applied change.

Since it is given that reaction is exothermic therefore, according to Le Chatelier's principle increase in temperature will be opposed so that reaction can proceed in the forward direction. Therefore, temperature has to be decreased to carry the reaction in forward direction.

Whereas pressure has to be increased so that reaction will shift to the forward side where there are less number of molecules.

Thus, we can conclude that to increase the yield of the products for the given reaction decrease the temperature and increase the pressure.

I need help please Which option is chemical change?

Answers

Answer:

Getting coated with tarnish

Explanation:

Silver, the original substance is combining with a new substance tarnish to make a whole new chemical.

Condensation point AND freezing point of oxygen in C and F?

Answers

Answer:54.36 K (−218.79 °C; −361.82 °F)

Explanation:

The compound NaOH(s) dissolves in water to yield(1) hydroxide ions as the only negative ions
(2) hydroxide ions as the only positive ions
(3) hydronium ions as the only negative ions
(4) hydronium ions as the only positive ions

Answers

Answer: Option (1) is the correct answer.

Explanation:

Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.

The chemical equation for this dissociation is as follows.

$NaOH(s) + H_(2)O(l) \rightarrow Na^(+)(aq) + OH^(-)(aq)$

Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.

Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.

How do you balance __H2SO4 + __B(OH)3 --> __B2(SO4)3 + __H2O

Answers

$B(OH)_3=H_3BO_3$

then

$H_2SO_4+H_3BO_3\longrightarrow~B_2(SO_4)_3+H_2O$

$\boxed{3H_2SO_4+2H_3BO_3\longrightarrow~B_2(SO_4)_3+6H_2O}$

In terms of the sequence of the scientific method what is the immediate purpose of doing an experiment?

Answers

The correct answer should be something like gathering data or similar.

You conduct experiments to test a hypothesis and then gather the data and analyze it to see whether the hypothesis is correct.

Answer:

gathering data

Explanation:

When you do an experiment you want to gather information to make a conclusion on your hypothesis.......-

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