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Mole Basics
Test Description: Use mole relationships discussed in class to answer the following questions.
Instructions: Answer all questions to get your test result.
1) The volume of 1 mol of a gas in liters at STP is
A
6.02 x 1023 L
B
22.4 L
C
44.8 L
D
11.2 L
2) What is the gram formula mass of Ca(OH)2?
A
74g
B
29g
C
57g
D
34g
3) How many molecules are in 38 g of F2 gas?
A
3.0 x 1023 molecules
B
12 x 1023 molecules
C
9.0 x 1023 molecules
D
6.0 x 1023 molecules
4) How many moles of copper are equivalent to 3.44 × 1023 molecules of copper?
A
1.75 moles
B
0.571 moles
C
5.41 x 1021 moles
D
5.71 x 1022 moles
5) What is the mass of 2 moles of HgO?
A
323 g
B
433 g
C
217 g
D
108 g
6) Which substance has the greatest molecule mass?
A
NO
B
H2O2
C
CF4
D
I2
7) What mass of carbon dioxide gas occupies a volume 22.4 L at STP?
A
66.0 g
B
22.0 g
C
44.0 g
D
88.0 g
8) A student has one mole of an unknown compound in a test tube. The mass of the compound is 58.4 g. The compound could be
A
CuCl
B
AgNO3
C
NaCl
D
CaCl2
9) How many moles are in 5.6 L of O2(g) at STP?
A
0.75 moles
B
0.50 moles
C
1.0 moles
D
0.25 moles
10) At STP, 170 g of NH3 gas will occupy a total of
A
22.4 L
B
224 L
C
2.24 L
D
2240 L
*select an answer for all questions
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