Cliffs AP Chemistry, 3rd Edition

Samples: Multiple-Choice Questions

1. A 10.0% sucrose solution has a density of 2.00 g/mL. What is the mass of sucrose
   dissolved in 1.00 liter of this solution?

A. 1.00 × 102 g

B. 2.00 × 102 g

C. 5.00 × 102 g

D. 1.00 × 103 g

E. 1.00 × 104 g

Answer: B

This problem can be easily solved using the factor-label method:

..

.

.

.

liter solution

liter solution

mL solution

mL solution

g solution

g solution

g sucrose

g sucrose

1

100

1

1000

1

200

100 0

10 0

200 10^2

###

= #

_i

2. How many milliliters of a 50.0% (by mass) HNO 3 solution, with a density of
   2.00 grams per milliliter, are required to make 500. mL of a 2.00 M HNO 3 solution?

A. 50.0 mL

B. 63.0 mL

C. 100. mL

D. 200. mL

E. 250. mL

Answer: B

This problem can be easily solved using the factor-label method:

..

.

.

.

.

.'

.'

.'

.'

.% '

.% '

.% '

..%

mL M sol n

mL M sol n

liter M sol n

liter M sol n

moles HNO

mole HNO

g HNO

g HNO

g sol n

g sol n

mL sol n

mL of a sol n

1

500

1000

1

1

200

1

63 0

50 0

100

200

1

200

200

200

200

50 0

50 0

50 0

63 0 50 0 ’

3

3

3

3

##

###

=

^

^

^

^

h

h

h

h

Solutions