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Question Day 3: Chemistry (Mole concept)

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Chemistry · Mole concept

How many moles are contained in 4.9 g of tetraoxosulphate(VI) acid, H₂SO₄? (H = 1, S = 32, O = 16)

A. 0.02
B. 0.10
C. 0.50
D. 0.05

Reply with your answer and how you got it, then check below.

Answer: D

Molar mass of H₂SO₄ = 2(1) + 32 + 4(16) = 98 g/mol.
Moles = mass / molar mass = 4.9 / 98 = 0.05 mol.

Read more: New School Chemistry (Ababio): the mole concept
 
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