Q.

The mass of one atom of carbon-12 is:


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a

1 g

b

1.99 × 10-23g

c

112g

d

1.99 × 1023g 

answer is B.

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Detailed Solution

  The mass of one atom of carbon-12 is 1.99 × 10-23g.      Therefore, it can be said that the mass of 6.022 X 1023  atoms are 1.99 × 1O23. Atoms of carbon are 12 grams. Hence, the mass of one carbon atom is  1.99 × 1023grams .
 
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The mass of one atom of carbon-12 is: