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Mole Concept

How many gram...

Question

How many grams of magnesium oxide is formed when 4.8 gm of magnesium is combined with 3.2 gm of oxygen?

A

4.2 gm

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B

3.2 gm

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C

8 gm

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D

16 gm

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Solution

The correct option is C 8 gm
$2 M g + O_{2} \to 2 M g O$
$4.8 g M g \equiv 0.2 m o l e$
$3.2 g O_{2} \equiv 0.1 m o l e$
According to the reaction equation, 0.2 mole , i.e., 8 g of magnesium oxide will be formed.

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