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Question (21)

QN007530

The formula unit mass of magnesium chloride (MgCl₂) is:

(A) 59 u
(B) 71 u
(C) 95 u
(D) 111 u

Correct Answer: C

Explanation:

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Question (22)

QN007531

Which ionic compound contains three ions in one formula unit?

(A) NaCl
(B) MgO
(C) CaCl₂
(D) KBr

Correct Answer: C

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Question (23)

QN007532

The formula unit mass of calcium carbonate (CaCO₃) is:

(A) 80 u
(B) 90 u
(C) 100 u
(D) 110 u

Correct Answer: C

Explanation:

40 + 12 + (3 × 16) = 100 u

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Question (24)

QN007533

Which statement is true regarding formula unit mass?

(A) It is expressed in metres
(B) It applies to ionic compounds
(C) It measures electric charge
(D) It changes with state

Correct Answer: B

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Question (25)

QN007534

The formula unit mass of sodium sulfate (Na₂SO₄) is:

(A) 110 u
(B) 126 u
(C) 142 u
(D) 158 u

Correct Answer: C

Explanation:

(2 × 23) + 32 + (4 × 16) = 142 u

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Question (26)

QN007535

Which ionic compound has formula unit mass 56 u?

(A) CaO
(B) NaCl
(C) MgO
(D) KCl

Correct Answer: A

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Question (27)

QN007536

Formula unit mass depends upon:

(A) Shape of ions
(B) Atomic masses of constituent ions
(C) Colour of compound
(D) Physical state only

Correct Answer: B

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Question (28)

QN007537

The formula unit mass of ammonium sulfate [(NH₄)₂SO₄] is:

(A) 114 u
(B) 132 u
(C) 148 u
(D) 164 u

Correct Answer: B

Explanation:

(2 × 14) + 8 + 32 + (4 × 16) = 132 u

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Question (29)

QN007538

Which ionic compound has smallest formula unit mass?

(A) Na₂O
(B) MgO
(C) KCl
(D) CaCl₂

Correct Answer: B

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Question (30)

QN007539

The formula unit mass of potassium nitrate (KNO₃) is:

(A) 85 u
(B) 101 u
(C) 117 u
(D) 133 u

Correct Answer: B

Explanation:

39 + 14 + (3 × 16) = 101 u

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Question (21)

The formula unit mass of magnesium chloride (MgCl₂) is:

Explanation:

Link:

Question (22)

Which ionic compound contains three ions in one formula unit?

Explanation:

Link:

Question (23)

The formula unit mass of calcium carbonate (CaCO₃) is:

Explanation:

Link:

Question (24)

Which statement is true regarding formula unit mass?

Explanation:

Link:

Question (25)

The formula unit mass of sodium sulfate (Na₂SO₄) is:

Explanation:

Link:

Question (26)

Which ionic compound has formula unit mass 56 u?

Explanation:

Link:

Question (27)

Formula unit mass depends upon:

Explanation:

Link:

Question (28)

The formula unit mass of ammonium sulfate [(NH₄)₂SO₄] is:

Explanation:

Link:

Question (29)

Which ionic compound has smallest formula unit mass?

Explanation:

Link:

Question (30)

The formula unit mass of potassium nitrate (KNO₃) is:

Explanation:

Link:

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