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Percentage Composition

One mole of o...

Question

One mole of oxygen atom weighs 16 grams, what will be the mass (in grams) of 0.4 moles of oxygen atoms?

A

¹/₄ mole

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B

640 mole

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C

0.4 mole

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D

4 mole

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Solution

The correct option is C
0.4 mole

Atomic mass of Ca = 40 u
Molar mass of Ca = 40 g

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