Description
QUESTION 1
1. Select the correct choice for the coefficients needed to balance the following equation.
__ N2O5 + __ H2O ? __ HNO3
1, 1, 2
2, 1, 3
1, 1, 3
1, 2, 3
0.4 points
QUESTION 2
1. Consider the following balanced chemical reaction: 2 C2H6 + 7 O2 ? 4 CO2 + 6 H2O
How many moles of O2 are required to react with 1 mole of C2H6?
3.5
7
2.5
2
0.4 points
QUESTION 3
1. Select the correct choice for the coefficients needed to balance the following equation.
__ Ag2S + __ NaOH ? __ Na2S + __ AgOH
1, 1, 1, 2
1, 2, 1, 2
1, 2, 3, 1
2, 2, 3, 1
0.4 points
QUESTION 4
1. The total number of each type of atom must be the same on both sides of an equation in order to
satisfy the law of _____________.
creation of matter
conservation of matter
conservation of energy
multiple proportions
0.4 points
QUESTION 5
1. Consider the following balanced chemical reaction: 2 C 2H6 + 7 O2 ? 4 CO2 + 6 H2O
How many moles of CO2 will be produced from 4 moles of C2H6 and 14 moles of O2?
2
8
14
4
0.4 points
QUESTION 6
1. What is the chemical equation for the following chemical reaction?
2 O2 + 3 N2 ? 2 NO2
4 O + N2 ? 2N4O
4 O + 2 N ? N4O8
2 O2 + N2 ? N2O4
0.4 points
QUESTION 7
1. Consider the following balanced chemical reaction: 2 C 2H6 + 7 O2 ? 4 CO2 + 6 H2O
How many moles of H atoms are there in 2 moles of C2H6?
6
2
1
12
0.4 points
QUESTION 8
1. What is the chemical equation of the following chemical reaction?
3 CH4 + 2 O2 ? 3 CO2 + 2 H2O
C + 2 H2 + 2 O2 ? CO2 + H4O2
4 H + 1 C + 4 O ? 2 O2 + CH4
CH4 + 2 O2 ? CO2 + 2 H2O
0.4 points
QUESTION 9
1. Select the correct choice for the coefficients needed to balance the following equation.
__ H3PO4 + __ NaOH ? __ H2O + __ Na3PO4
1, 1, 1, 3
1, 3, 3, 1
1, 2, 2, 1
1, 3, 3, 3
0.4 points
QUESTION 10
1. Which one of the following reactions is not balanced?
C12H22O11 + H2O ? 4 C2H5OH + 4 CO2
2 Co(NO3)3 + 2 (NH4)2S ? Co2S3 + 6 NH4NO3
PbS + 2 HBr ? PbBr2 + H2S
C5H12 + 8 O2 ? 5 CO2 + 6 H2O
0.4 points
QUESTION 11
1. Consider the following balanced chemical reaction: 2 C 2H6 + 7 O2 ? 4 CO2 + 6 H2O
How many moles of C atoms are there in 2 moles of C2H6?
8
4
1
2
0.4 points
QUESTION 12
1. Identify the reactant(s) in the following reaction:
2 Na + 2 H2O ? 2 NaOH + H2
Na and H2O
Only Na
NaOH and H2
Only H2
0.4 points
QUESTION 13
1. Select the correct choice for the coefficients needed to balance the following equation.
__ H2 + __ N2 ? __ NH3
1, 1, 3
2, 1, 1
3, 1, 2
1, 2, 2
0.4 points
QUESTION 14
1. What is the chemical equation for the following chemical reaction?
3 H2N2 ? 4 NH3
3 H2 + N2 ? 2 NH3
H2 + 3 N2 ? N2H6
6 H + 2 N ? 2 N + 3 NH
0.4 points
QUESTION 15
1. Identify the product(s) in the following reaction:
2 Na + 2 H2O ? 2 NaOH + H2
NaOH and H2
Only Na
NaOH and Na
Na and H2O
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