2 years ago

How many grams of water can be vaporized by 2.153 kJ of energy?

1 answer:

4 0

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DiKsa [7]

Answer: The number of moles of calcium metal required is 2.0 moles.

Explanation:

We are given:

Moles of water reacted = 4.0 moles

The given chemical reaction follows:

$Ca+2H_2O\rightarrow Ca(OH)_2+H_2$

By Stoichiometry of the reaction:

2 moles of water is reacted with 1 mole of calcium metal

So, 4.0 moles of water will react with = $\frac{1}{2}\times 4.0=2.0mol$ of calcium metal

Hence, the number of moles of calcium metal required is 2.0 moles.

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