Stoichiometry IGCSE
Assessment
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Nabihah Zainol
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Chemistry
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9th - 11th Grade
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531 plays
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Hard
Student preview
16 questions
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1.
Multiple Choice
An oxide of nitrogen has the following composition by mass: N, 30.4%; O, 69.6%.
It has a relative molecular mass of 92.
What is the molecular formula of the oxide of nitrogen?
NO
NO2
NO4
N2O4
2.
Multiple Choice
Which statements are correct?
1 and 2
1 and 4
2 and 3
3 and 4
3.
Multiple Choice
The relative formula mass, Mr, of calcium carbonate, CaCO3, is 100.
What is the mass of carbon present in 100 g of calcium carbonate?
12 g
40 g
36 g
60 g
4.
Multiple Choice
The compound magnesium nitrate has the formula Mg(NO3)2.
What is the relative formula mass of magnesium nitrate?
86
134
148
172
5.
Multiple Choice
Propane burns in oxygen.
C3H8 + xO2 → 3CO2 + yH2O
Which values of x and y balance the equation?
x = 5, y = 4
x = 7, y = 4
x = 10, y = 8
x = 13, y = 8
6.
Multiple Choice
A
B
C
D
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