quick chemistry

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A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen.

What is solid B most likely to be?

a)compound
b)can not be determined

im thinking its a? is that correct?

and

What is gas C most likely to be?

a)compound
b)can not be determined

b?

  • quick chemistry -

    solid B can not be determined because it doesn't have enough information and gas C is a compound

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