What mass of hydrogen and oxygen will be produced on complete electrolysis of 18g of water?

2 g

hydrogen and 32g oxygen

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2 g

hydrogen and 16g oxygen

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4 g

hydrogen and 32g oxygen

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4 g

hydrogen and 14g oxygen

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Solution

The correct option is B $2 g$ hydrogen and 16g oxygen
The balanced chemical equation for electrolysis can be written as:
$2 H_{2} O \to 2 H_{2} + O_{2}$
Now 36g of $H_{2} O$ gives = 4g of $H_{2}$ and 32g of $O_{2}$
Therefore 18g of $H_{2} O$ gives = 2g of $H_{2}$ and 16g of $O_{2}$

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Similar questions

34 g of $H_{2} O$ is decomposed to _______ g of hydrogen and ____ g of oxygen.

Hydrogen and oxygen combine in a ratio of 1:8 by mass to form water. What mass of oxygen gas is required to react completely with 3g of hydrogen gas?

2 g

32 g

H = 1, O = 16

(O_{2})

0.20 g

(H_{2})

(H_{2} O)

H_{2} = 2 g/mol, O_{2} = 32 g/mol

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