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WorksheetsMolar Mass
Total questions: 11
Worksheet time: 39mins
Name
Class
Date
1.
What is the molar mass of Carbon?
a)
6
b)
12
c)
20
d)
40
2.
What is the molar mass of CO2 to the ones place?
a)
12
b)
16
c)
32
d)
44
3.
How many particles are in a mole?
a)
602
b)
602 million
c)
602 moles
d)
6.02 x 1023
4.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
5.
What is the molar mass of B2(CO3)3?
a)
81.632 g/mol
b)
94.842 g/mol
c)
38.822 g/mol
d)
201.648 g/mol
6.
How many moles of atoms in 1 mole of CO2?
a)
1
b)
3
c)
3 x 6 x 1023
d)
1 x 6 x 1023
7.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
8.
Which has a greater mass: 1 mole of scandium or 2 moles of boron?
a)
scandium
b)
boron
c)
neither
d)
more information is needed.
9.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
10.
The mole concept is important in chemistry because
a)
it allows us to distinguish between elements and compounds.
b)
atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
c)
it establishes a standard for reaction stoichiometry.
d)
it provides a universally accepted standard for mass.
11.
Find the percentage composition of Mg in Mg3(PO4)2.
a)
27.75% Mg
b)
23.57% Mg
c)
48.68% Mg
d)
13.45% Mg
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