WorksheetsMolar Mass Conversions and Bohr Atom
Total questions: 20
Worksheet time: 44mins
Name
Class
Date
1.
What is the molar mass of H2O?
a)
6.02 x 1023
b)
16 grams
c)
18 grams
d)
15.99999 grams
2.
What is the molar mass NaCl?
a)
58 grams
b)
22.95 grams
c)
162 grams
d)
6.02 x 1023
3.
How many atoms are in 1 mole of NaCl?
a)
6.02 x 1023
b)
58
c)
11
d)
17
4.
How many moles are in 32 grams of oxygen gas?
a)
3
b)
2
c)
1
d)
4
5.
How many moles are in 20 grams of Ca (Calcium)?
a)
0.5
b)
1
c)
3
d)
20
6.
What is the molar mass when you have 4 moles of CO2?
a)
176 grams
b)
54 grams
c)
128 grams
d)
280 grams
7.
How many molecules are in 2.5 mol of sodium chloride?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
8.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
9.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5 moles
10.
How many grams are in 3.3 mol of Potassium Sulfide?
a)
360 g
b)
454 g
c)
238 g
d)
132 g
11.
Convert 50.0 grams of H2O to moles of H2O.
a)
901 moles
b)
18.02 moles
c)
2.77 moles
12.
3.0 moles of sodium hydroxide is equal to what mass?
a)
about 40 grams
b)
about 23 grams
c)
about 120 grams
13.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
14.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
15.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
16.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
17.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
18.
How many valence electrons?
a)
2
b)
3
c)
5
d)
10
19.
The innermost energy level has a maximum of how many electrons?
a)
1
b)
2
c)
6
d)
8
20.
Which Bohr model represents Neon?
a)
b)
c)
d)
100 %
