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30 October, 15:46

For an experiment, you need 0.10 moles of NaCl for a chemical reaction. how much NaCl must you weigh out?

A. 0.14g

B. 3.2 g

C. 8.2 g

D. 5.8 g

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  1. 30 October, 15:57
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    Mole = mass : Mr

    ∴mass = mole*Mr = 0.10 * (23+35.5) = 5.85

    the answer is D ...

    The Mr is obtained from the periodic table
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