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WorksheetsMoles/Percent %/Emp. Formulas
Total questions: 14
Worksheet time: 20mins
Name
Class
Date
1.
Who discovered the Mole?
a)
Isaac Newton
b)
Albert Einstein
c)
Lorenzo Avogadro
d)
Aristotle
2.
What is Avagadro's Number?
a)
602,000
b)
23 x 106
c)
10 x 1023
d)
6.02 x 1023
3.
What is the molar mass for Magnesium?
a)
24.31 grams
b)
12 grams
c)
28.08 grams
d)
22.99 grams
4.
What is the molar mass of Bromine?
a)
35 grams
b)
79.90 grams
c)
32.06 grams
d)
85.48 grams
5.
What is the molar mass of NaCl?
a)
18.02 grams
b)
40 grams
c)
58.44 grams
d)
65.33 grams
6.
What day of the year is Mole Day celebrated on?
a)
June 23rd
b)
October 6th
c)
June 6th
d)
October 23rd
7.
What is the equation for calculating percent composition?
a)
mass of element/mass of compound = x 100
b)
mass of compound/mass of element = x 100
c)
total mass/molar mass = x 100
d)
molar mass/molar mass = x 100
8.
Fill in the blank....
Percent to Mass, Mass to Mole, ____________, Multiply till whole.
Percent to Mass, Mass to Mole, ____________, Multiply till whole.
a)
Multiply by Small
b)
Divide by Small
c)
Divide till Whole
d)
Divide by the number off the PT
9.
What is the unit for molar mass?
a)
Moles
b)
Grams
10.
What is the molar mass for Baking Soda? (NaHCO3)
a)
52.01 grams
b)
68 grams
c)
83.98 grams
d)
82.97 grams
11.
How many moles are in 45.98 grams of Na?
a)
2 moles
b)
2.5 moles
c)
3 moles
d)
3.5 moles
12.
How many moles are in 223.40 grams of Fe?
a)
1 moles
b)
2 moles
c)
3 moles
d)
4 moles
13.
How many grams are in 5 moles of Carbon?
a)
12.01 grams
b)
24.02 grams
c)
36.03 grams
d)
60.05 grams
14.
How many grams are in 7 moles of Helium?
a)
12 grams
b)
28 grams
c)
16 grams
d)
24 grams
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