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Which one of the following best explains...

Which one of the following best explains the law of conservation of mass ? (a) 100 g of water is heated to give steam. (b)A sample of `N_2` gas is heated at constant pressure without any change in mass. (c)36 g of carbon combines with 32 g of oxygen to form 68 g of `CO_2` (d)10 g of carbon is heated in vacume without any change in mass.

A

100 g of water is heated to give steam.

B

A sample of `N_2` gas is heated at constant pressure without any change in mass.

C

36 g of carbon combines with 32 g of oxygen to form 68 g of `CO_2`

D

10 g of carbon is heated in vacuume without any change in mass.

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