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Question

Which of the following samples will have the same number of atoms as 40 g calcium?


A
24 g magnesium
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B
64 g silphur
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C
14 g nitrogen
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D
8 g oxygen
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Solution

The correct option is A 24 g magnesium

Molar mass of $$Ca=M`= 40$$

Molar mass of$$Mg=M=24$$

Given mass of $$Ca= m`=40g$$

Given mass of $$Mg=m=?$$

Formula: $$m= m`× M/ M`$$

$$m= 40\times \dfrac{24}{40}$$

$$m= 24g$$


Chemistry

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