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? Options: NO, NO2, NO4, N2O4
Stoichiometry IGCSE

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Chemistry
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9th - 11th Grade
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Hard
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1.
FLASHCARD QUESTION
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N2O4
2.
FLASHCARD QUESTION
Front
Which statements are correct? Options: 1 and 2, 1 and 4, 2 and 3, 3 and 4
Back
1 and 2
3.
FLASHCARD QUESTION
Front
What is the mass of carbon present in 100 g of calcium carbonate (CaCO3) with a relative formula mass (Mr) of 100?
Back
12 g
4.
FLASHCARD QUESTION
Front
What is the relative formula mass of magnesium nitrate (Mg(NO3)2)? Options: 86, 134, 148, 172
Back
148
5.
FLASHCARD QUESTION
Front
C3H8 + xO2 → 3CO2 + yH2O. Which values of x and y balance the equation? Options: x = 5, y = 4; x = 7, y = 4; x = 10, y = 8; x = 13, y = 8.
Back
x = 5, y = 4
6.
FLASHCARD QUESTION
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Back
D
7.
FLASHCARD QUESTION
Front
Back
C
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