WorksheetsChemical Quantities I
Total questions: 14
Worksheet time: 30mins
Name
Class
Date
1.
What is the SI unit for a count of atoms?
a)
meter
b)
mass
c)
molecule
d)
mole
2.
What is the molar mass of CO2?
a)
44 grams/mole
b)
44 amu/mole
c)
0.44 grams/mole
d)
2.6 x 1025 atoms/mole
3.
How many moles are contained in 45 grams of aluminum?
a)
27 mol
b)
1215 mol
c)
1.7 mol
d)
57 mol
4.
How many moles of chlorine gas are contained in 45 grams of pure sample?
a)
35 mol
b)
0.63 mol
c)
1.3 mol
d)
2.6 mol
5.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
6.
A container with a volume of 893 L contains how many moles of air at STP?
a)
20003.2 mol
b)
39.9 mol
c)
22.4 mol
d)
none of the choices
7.
If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?
a)
0.0129 g
b)
120. g
c)
187 g
d)
9.33 g
8.
How many moles are in 74 g of KCl
a)
0.99 mole
b)
0.014 mole
c)
11 moles
d)
0.14 mole
9.
What is Avagadro's number?
a)
6.02 X 10 24
b)
6.02 X 10 23
c)
6.02 X 10 22
d)
6.02 X 10 21
10.
What is the volume occupied by 1 mole of any gas at STP?
a)
44.8 L
b)
22.4 L
c)
16.8 L
d)
20.4 L
11.
A mole of potassium chloride contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
12.
How many molecules are in 250. g of C6H12O6?
a)
8.35 x 1023
b)
31.1
c)
8 x 1023
d)
31
13.
What is the mass AND volume of
1.4 x 1025 molecules of CH3Cl at STP (Pick 2 answers)
a)
1200 g
b)
1170 g
c)
521 L
d)
520 L
14.
What is the mass of 2510 L of O2 at STP?
a)
5730 g
b)
3590 g
c)
1790 g
d)
373 g
100 %
