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Question

Mass of 6.022 x 1022 molecules of CO2 is about:


A

12 g

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B

1.4 g

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C

4.4 g

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D

2.2 g

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Solution

The correct option is C

4.4 g


1 mole of a substance is equal to its molecular mass expressed in terms of grams.

Gram molecular mass of CO2 = 12 + (16 Χ 2)

= 12 + 32

= 44 g

Mass of 1 mole (6.023 X 1023 molecules) of CO2 is about 44g.


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