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 solids A and B and the gas C are elements or compounds? Explain your conclusions for each substance.

Solid A and gas C are compounds but I don't know why. B doesn't have enough information... ??

A breaks down to form two products; both a gas and a solid so it must be a compound. C is a gas the same as C + O2 ==> CO2; therefore, it is a compound. B may be a compound and it may be an element.

A is a hetrogenous

B is either an element or a compound

To determine whether solids A and B, as well as gas C, are elements or compounds, we need to analyze the given information carefully.

1. Solid A decomposes to form substance B and gas C. This indicates a chemical reaction taking place.
2. Gas C has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen.

From these observations, we can make preliminary conclusions:

1. Solid A: Since it decomposes to form substances B and C, it is likely a compound. Compounds are substances composed of two or more elements chemically bonded together. Since A reacts to produce other substances, it suggests that A is not an element.

2. Gas C: It has the same properties as the product obtained when carbon is burned in an excess of oxygen. This strongly suggests that gas C is carbon dioxide (CO2). Carbon dioxide is a compound composed of carbon and oxygen. Therefore, gas C is a compound.

3. Solid B: The information provided does not give us enough clues to determine whether solid B is an element or a compound. We only know that it is a new white substance formed during the decomposition of solid A. Further information or experimentation would be needed to ascertain its composition.

In summary, based on the given information, solid A is likely a compound, gas C is a compound (specifically carbon dioxide), but solid B cannot be determined without additional information or experimentation.

It's an element of compound

A is a element

B is a compound
C is a compound
ex. C + O2 = CO2