Problem: 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.Based on these observations, can we determine whether solid B is an element or a compound?

FREE Expert Solution

We have to determine whether the substance B formed by decomposition of substance A is an element or a compound.


The solid substance A decomposes to produce B and a gas C, which has the same composition as the gas which is produced by combustion of carbon.


When carbon is burned in excess oxygen, it is converted to carbon dioxide gas (CO2).

88% (382 ratings)
View Complete Written Solution
Problem Details

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.

Based on these observations, can we determine whether solid B is an element or a compound?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mixtures concept. You can view video lessons to learn Mixtures. Or if you need more Mixtures practice, you can also practice Mixtures practice problems.