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3 years ago

When zinc reacts with sulfuric acid, as shown here, what mass of hydrogen is produced from 31.8 g of zinc?

Chemistry

1 answer:

Alina [70]3 years ago

3 0

Answer:

The answer to your question is 0.98 g of H₂

Explanation:

Data

mass of H₂ = ?

mass of Zn = 31.8 g

Balanced chemical reaction

Zn + H₂SO₄ ⇒ ZnSO₄ + H₂

Process

1.- Calculate the molar mass or atomic mass of Zinc and hydrogen

The Atomic mass of zinc = 65 g

The Molar mass of H₂ = 2 g

2.- Use proportions and cross multiplication to find the mass of H₂ formed.

65 g of Zn ----------------- 2 g of H₂

31.8 g of Zn -------------- x

x = (31.8 x 2) / 65

x = 63.6/65

-Result

x = 0.98 g of H₂

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