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WorksheetsDCA 2 Review
Total questions: 16
Worksheet time: 44mins
Name
Class
Date
1.
Find the Molar Mass of:
Pb(NO3)2
Pb(NO3)2
a)
241 g/mol
b)
207 g/mol
c)
301 g/mol
d)
331 g/mol
2.
How many moles are in 16.94g of H2O? (given over molar mass)
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
3.
What is the molarity of 4 grams of NaCl in 3.8 L of solution? (convert g to moles first)
a)
0.018 M
b)
0.018 mol
c)
1.052 M
d)
1.052 mol
4.
CH4 + 2O2 --> CO2 + 2H2O
How many moles of oxygen are needed for the complete combustion of 3 moles of CH4? (use the balanced coefficients)
How many moles of oxygen are needed for the complete combustion of 3 moles of CH4? (use the balanced coefficients)
a)
2 moles
b)
4 moles
c)
6 moles
d)
8 moles
5.
How much 1.50M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?
a)
150. mL
b)
151 mL
c)
1.00 L
d)
100. mL
6.
K2CO3
a)
soluble
b)
insoluble
7.
CaCO3
a)
soluble
b)
insoluble
8.
Select the name for the following acid: H3PO4
a)
Phosphoric acid
b)
Phosphorous acid
c)
Hydrophosphoric acid
9.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
10.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
11.
Write a balanced reaction for this SR Reaction
MgCl2(aq) + H2SO4(aq) --> 2HCl(aq) + ____
MgCl2(aq) + H2SO4(aq) --> 2HCl(aq) + ____
a)
SO
b)
MgSO4
c)
MgS
d)
MgO4
12.
What type of reaction is this
3KOH(aq) + H3PO4(aq) --> K3PO4(aq) + 3H2O(l)
3KOH(aq) + H3PO4(aq) --> K3PO4(aq) + 3H2O(l)
a)
Neutralization
b)
Redox
c)
Precipitation
d)
Combustion
13.
The following is what type of reaction:
PbCl2(aq) + AgNO3(aq) → Pb(NO3)2(aq) + AgCl(s)
PbCl2(aq) + AgNO3(aq) → Pb(NO3)2(aq) + AgCl(s)
a)
Combustion
b)
Redox
c)
Neutralization
d)
Precipitation
14.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
15.
Determine the molar mass for CCl4
a)
158.8 g/mol
b)
47.54 g/mol
c)
189.35 g/mol
d)
82.9 g/mol
16.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?
What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
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