Free Printable Matter

1.

Which of the following contains the same number of atoms? [Ar Ca = 40; S = 32]

a)

1 g calcium and 1 g sulphur

b)

8 g calcium and 4 g sulphur

c)

10 g calcium and 8 gram sulphur

d)

8 g calcium and 10 g sulphur

2.

A calcium atom is 3.33 times the mass of a carbon atom. What is the atomic mass of calcium?

a)

33

b)

40

c)

38

d)

12

3.

Which of the following pairs of species have the same number of neutrons?

a)

$_{29}^{65}Q\ and\ _{16}^{34}Q$

b)

$_{29}^{63}Q\ and\ \ _{29}^{65}Q$

c)

$_{17}^{35}Q\ and\ \ _{29}^{63}Q$

d)

$_{17}^{35}Q\ and\ \ _{16}^{34}Q$

4.

Which of the following contains the greatest number of molecules?

a)

1.0 g of H₂O

b)

1.0 g of O₂

c)

1.0 g of O₃

d)

1.0 g of CO₂

5.

How many moles of H₂O molecules are there in 15.0 g of CuSO₄.5H₂O? [Ar Cu = 63.6; S = 32.1; H =1.0; O = 16.0]

a)

0.201

b)

0.833

c)

0.301

d)

0.031

6.

If 0.05 g of potassium hydroxide. KOH is dissolved in 250 mL of water, what is the concentration of solution in g mL^1-?

a)

0.4

b)

0.3

c)

0.1

d)

0.2

7.

What is the number of moles of KClO₃ that must decompose to produce 90.0 L of oxygen gas at s.t.p?

a)

0.03

b)

1.34

c)

2.68

d)

2.01

8.

A solution contains 28% sulphuric acid by mass. This means that

a)

1 litre of solution contains 28 g of sulphuric acid

b)

1 litre of solution has a mass of 28 g

c)

100 g of solution contains 28 g of sulphuric acid

d)

100 g of solution contains 28 % of sulphuric acid

9.

What is the mass maximum mass of ammonia, NH₃ that can be produced by the reaction between 1.7 g of nitrogen gas and 2.5 g of hydrogen gas?[Ar N = 14.0; H = 1.0]

a)

0.1 g

b)

2.5 g

c)

2.1 g

d)

1.1 g

10.

What is the volume of 2.0 M HCl that should be mixed with 0.5 L of 0.25 M HCl in order to prepare 1.5 L of 0.50 M HCl?

a)

0.31 L

b)

2.25 L

c)

1.50 L

d)

1.00 L

Matter

Total questions: 10

Worksheet time: 20mins

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