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4 years ago

Another name for drying agents is ___.

English

2 answers:

ad-work [718]4 years ago

6 0

Quiz Submissions - \[03\] Exam 3

Diana Behari (username: JM1200101)

Attempt 1

Written: Jan 3, 2019 12:17 AM - Jan 3, 2019 12:37 AM

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[02] Exam 3

Question 1 5 / 5 points

A glass of iced tea containing excess sugar at the bottom is said to be:

Question options:

homogeneous.

supersaturated.

saturated.

unsaturated.

Question 2 5 / 5 points

Which of the following would increase the solubility of a gas in a liquid?

Question options:

increasing the pressure of the gas above the solution

increasing the temperature of the solvent

adding more solvent

stirring the solution

Question 3 5 / 5 points

The rate at which a solute dissolves in a given solvent is determined by:

Question options:

the extent to which the solution is agitated.

the temperature of the solution.

the size of the solute particles.

all of the above

Question 4 5 / 5 points

If salt is dissolved in water, water serves as the:

Question options:

solute.

solvent.

dissolved medium.

none of the above

Question 5 5 / 5 points

Water samples containing dissolved substances are called _____ solutions.

Question options:

anhydrous

solvent

elementary

aqueous

Question 6 5 / 5 points

How many moles of solute are present in 1.25 L of a 0.75M NaNO3 solution?

Question options:

0.60 mol

1.7 mol

0.75 mol

0.94 mol

Question 7 0 / 5 points

The addition of antifreeze to water in a car radiator causes the freezing point of the mixture to:

Question options:

vary unpredictably.

decrease.

remain the same.

increase.

Question 8 5 / 5 points

Another name for drying agents is ___.

Question options:

effloresce

solvent

anhydrous

desiccant

Question 9 5 / 5 points

When a solute dissolves, the process is referred to as _____.

Question options:

solvent

solubility

solute

solvation

Question 10 5 / 5 points

The molarity of a solution that contains 14 g KOH per 150 mL of solution is:

Question options:

1.7M.

0.093M.

93M.

11M.

Question 11 5 / 5 points

What is the percent (m/m) of a solution containing 25 g of NaCl in 175 g of solution?

Question options:

0.14%

700%

14%

7.0%

Question 12 5 / 5 points

Which of the following changes will likely increase the solubility of a solid solute but decrease the solubility of a gaseous solute?

Question options:

Increasing the temperature

Decreasing the atmospheric pressure

Decreasing the concentration

Increasing the molecular mass of the solute

Question 13 0 / 5 points

If the solubility of a gas in water is 1.22 g/L at 2.75 atm, what is its solubility (in g/L) at 1.0 atm?

Question options:

3.36 g/L

3.97 g/L

2.25 g/L

0.44 g/L

Question 14 5 / 5 points

The electrolyte among the following is:

Question options:

KCl.

Mg(NO3)2.

NH4OH.

all of the above

Question 15 5 / 5 points

What is the percent by mass of water in MgSO4 • 7H2O?

Question options:

56.0%

51.1%

21.0%

195%

Question 16 5 / 5 points

Which of the following would be expected to dissolve readily in the nonpolar solvent CCl4?

Question options:

table salt

KNO3

Ca(OH)2

grease

Question 17 5 / 5 points

Which of the following would be expected to dissolve very readily in water?

Question options:

NaOH

CH4

CBr4

Question 18 5 / 5 points

Which of the following is true about hygroscopic substances?

Question options:

They have low vapor pressures.

They remove moisture from the air.

They can be used as drying agents.

all of the above

Question 19 5 / 5 points

If the solubility of AgNO3 at 40°C is 311 g per 100 g of water, what mass of this solute can be dissolved in 350 g of water at the same temperature?

Question options:

1100 g

0.89 g

110 000 g

1.1 g

Question 20 0 / 5 points

Which of the following results from the presence of a solute in a given solvent?

Question options:

The vapor pressure of the solution is lower than that of the pure solvent.

The boiling point of the solution is lower than that of the pure solvent.

The freezing point of the solution is higher than that of the pure solvent.

all of the above

ziro4ka [17]4 years ago

3 0

Your answer would be C: desiccant

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