AnswersCR SS Chemistry S2 201819 2026Scientific Notation and Significant Figures

Measures of Concentration: Molarity Answers

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1
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Every morning, Sarah prepares the same amount of coffee at the same temperature. Identify the coffee solution with the highest concentration.

A
On Wednesday, Sarah poured sugar into her coffee until the sugar molecules were spread evenly throughout the entire cup of coffee.
B
On Thursday, Sarah poured sugar into her coffee until undissolved sugar remained at the bottom of her coffee cup.
2
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Every Sunday, Sarah prepares blue fruit punch to have with dinner. Identify the fruit punch solution with the higher concentration.

A
fruit punch with a very dark blue color
B
fruit punch with a light blue color
3

A science teacher adds water to a strong acid for use in the lab with students. This makes the concentration , because the amount

Answers:
, because the amount:weaker
Selection 2:decreases.
4

of solute per volume of solvent

A
increases.
B
decreases.
C
remains the same.
5

✔ saturatedsupersaturatedunsaturated

A
✔ saturated
B
supersaturated
C
unsaturated
6

What is the molarity of a solution that contains 25 g of HCl in 150 mL of solution? (The molar mass of HCl is 36.46 g/mol.)What should you find first? ✔ moles X grams of solvent liters of solute

A
✔ moles
B
X grams of solvent
C
liters of solute
7

How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?1.50 mol0.050 mol✔ 0.075 mol

A
1.50 mol
B
0.050 mol
C
✔ 0.075 mol
8

Which equation shows the proper setup to find the volume of a 0.250 M CaCl2 solution that contains 39.5 g of CaCl2?

A
Option
B
Option
C
Option
9

The correct dimensional analysis equation is shown here:Did you perform the calculation correctly?

Question illustration
A
Yes, I got the correct answer.
B
Yes, but I got the wrong answer because of a math error.
C
No, I did not set up the calculation correctly.
10

Which methods could be used to dilute a solution of sodium chloride (NaCl)? Select all that apply.

A
Add more NaCl to the solution.
B
Add more water to the solution.
C
Remove a small amount of the solution and mix it with water.
D
Heat the solution to evaporate some of the water.
11

Find the new concentration of a solution if 25.0 mL of water is added to 125.0 mL of 0.150 M NaCl solution.What is the final volume? ⇒ 150.0 mL

Answer:

answer

12

A chemical supply company sells sulfuric acid (H2SO4) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 solution?Which equation should you use?

A
Option
Option A
B
Option
Option B
C
Option
Option C
13

What is the volume needed? ⇒ 1.5 mL of 4.00 M H2SO4

Answer:

answer

14

✔ It got darker.It got lighter.X It stayed the same.

A
✔ It got darker.
B
It got lighter.
C
X It stayed the same.
15

Which setup is correct for finding moles?

A
Option
Option A
B
Option
Option B
16

Calculate the mass of ammonium sulfide (NH4)2S in 3.00 L of a 0.0200 M solution. ⇒ 4.09 g (NH4)2S

Answer:

answer

17

A chemist wants a 0.100 M solution of NaOH. She has 0.0550 mol NaOH available. What volume of solution is needed to make the mixture?

A
0.0550 L
B
0.100 L
C
0.550 L
18

Label A-F based on the table using C for concentrated and D for dilute.

Answers:
Blank 1:answer
Blank 2:answer
Blank 3:answer
Blank 4:answer
Blank 5:answer
Blank 6:answer
19

Which equation should you use to find the final concentration?

A
Option
B
Option
C
Option
20

Which statement best explains how the solution should be made?

A
Add 1.5 mL of 0.50 M H2SO4 to 10.5 mL of water to get 12 mL of 4 M H2SO4.
B
Add 1.5 mL of 4.00 M H2SO4 to 10.5 mL of water to get 12 mL of 0.50 M H2SO4.
C
Add 1.5 mL of 4.00 M H2SO4 to 12 mL of water to get 0.50 M H2SO4.

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