Chemical Calculations

Quiz
•
Chemistry
•
10th Grade
•
Hard
Ethel Chng
Used 244+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
When does a chemical reaction stop?
when the laboratory closes
when the excess reactant is used up
when the limiting reactant is used up
chemical reactions never stop
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Fe + S → FeS
0.8 moles of Fe are allowed to react an excess of S. What is the mass of FeS produced?
(Ar of Fe = 56, Ar of S = 32)
25.6 g
44.8 g
70.4 g
88 g
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
2CO + O2 → 2CO2
What is the mass of CO2 produced by reacting 2 moles of O2 with an excess of CO?
(Ar of C = 12, Ar of O = 16)
22 g
44 g
88 g
176 g
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
2H2 + O2 → 2H2O
How many moles of water can be made from 100 g of hydrogen?
(Ar of H = 1, Ar of O = 16)
25 mol
50 mol
100 mol
200 mol
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
2C2H6 + 7O2 → 4CO2 + 6H2O
What is the mass of C2H6 used to produce 2 moles of CO2?
(Ar of C = 12, Ar of H = 1, Ar of O = 16)
2 g
30 g
60 g
120 g
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
CH4 + 2O2 → CO2 + 2H2O
24 g of CH4 will produce how many grams of CO2?
(Ar of C = 12, Ar of H = 1, Ar of O = 16)
15 g
24 g
44 g
66 g
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Zn + 2HCl → ZnCl2 + H2
When 14.6 g of HCl is used, what is the mass of H2 produced?
(Ar of H = 1, Ar of Cl = 35.5)
0.2 g
0.4 g
0.8 g
7.3 g
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