The mass of $0.4$ gram-atoms of calcium is:

4 g

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8 g

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16 g

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32 g

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Solution

The correct option is C $16 g$
The atomic mass of $C a = 40 u$
So, the gram atomic mass of $C a = 40 g$
Therefore, the mass of $0.4$ gram-atoms of calcium = $40 \times 0.4 = 16 g$

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