mole and formulae

mole and formulae

10th - 11th Grade

60 Qs

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mole and formulae

mole and formulae

Assessment

Quiz

Chemistry

10th - 11th Grade

Hard

Created by

Aji Christian Bani Adam

Used 5+ times

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60 questions

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1.

FILL IN THE BLANK QUESTION

5 mins • 1 pt

Media Image

Diagram shows a box of aspirin which can relieve fever and pain. If the molecular formula of aspirin is C9HXO4, determine the value of x.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following gases contains 0.4 mol of atoms at room temperature and pressure?

[1 mol of gas occupies the volume of 24 dm3 at room temperature and pressure]

4.8 dm3 He

4.8 dm3 H2

4.8 dm3 SO3

4.8 dm3 CO2

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A compound with formula XCO3 has a relative formula mass of 125. What is the relative atomic mass of X? [Ar C = 12 and O = 16]

24

40

59

65

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Calculate the volume of carbon dioxide gas produced for a complete combustion of 30 g of ethane gas at STP. [Ar H = 1, C = 12, 1 molar volume 22.4 dm3 mol-1 at STP]

22.4 dm3

44.8 dm3

67.2 dm3

89.6 dm3

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180?

CH2O

C2H4O2

C4H8O4

C6H12O6

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the number of moles of hydrogen atoms in 1.7 g of ammonia gas (NH3)?

0.1

0.3

1.4

1.7

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The mass of one mole of oxygen atoms is 16 g. What is the mass of one mole of oxygen gas?

8 g

16 g

24 g

32 g

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