WorksheetsInvestigation 5 Chemical Quantities
Total questions: 21
Worksheet time: 1hrs 28mins
Name
Class
Date
1.
Which of the following would have the highest number of moles?
a)
4g CO2
b)
15g H2O
c)
22g NaCl
d)
100g AgCl
2.
How many grams are in 3.3 mol of Potassium Sulfide (K2S)?
a)
360 g
b)
454 g
c)
238 g
d)
132 g
3.
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
4.
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
5.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
6.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
674 g
d)
389 g
7.
Find the percent composition of hydrogen in (NH4)2S.
a)
11.8%
b)
41.1%
c)
47.1%
8.
What is the molar mass of Hydrogen Peroxide (H2O2)? **Use the periodic table Ms. Keeler gave you.
a)
48.00 g/mole
b)
34.02 g/mole
c)
36.50 g/mole
d)
35.50 g/mole
e)
34.01 g/mole
9.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
10.
How many liters are in 19.82 g Mg(OH)2?
a)
10.75 liters
b)
10.7 liters
c)
8.0 liters
d)
7.611 liters
11.
What type of particle is: Ag
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
12.
What type of particle is: KCl
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
13.
What type of particle is: NO2
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
14.
What type of particle is: NO2-1
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
15.
What is the mass of one mole of aluminum?
a)
26.98 g
b)
13 g
c)
53.99 g
d)
14 g
16.
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
a)
K2SO4
b)
K8SO16
c)
K8S4O8
d)
K8S4O16
17.
What is the empirical formula for the following molecular formula: C6H14
a)
C6H14
b)
C3H7
c)
CH2
d)
CH3
18.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements. (keep two decimal places throughout calculations)
a)
SO
b)
SO2
c)
SO3
d)
SO4
19.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
20.
A compound came out with the following mole ratio
3 Carbon: 1.49 Phosphorus: 2 Oxygen- what would be the empirical formula?
a)
Ca6P3O4
b)
C3PO2
c)
C6P3O4
d)
C3P3O2
21.
What is the empirical formula for a compound containing: 92.30% carbon and 7.70% hydrogen
a)
CH
b)
CH4
c)
C2H4
d)
CH2
100 %
