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Which one of the best example of law of ...

Which one of the best example of law of conservation of mass?

A

6 g of carbon is heated in vacuum, there is no change in mass.

B

6 g of carbon combines with 16 g of oxygen to from 22 g of `CO_2`

C

6 g water is completely converted into steam.

D

A sample of air is heated at constant pressure when its volume increases but there is no change in mass.

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The correct Answer is:
B
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