A pure substance A is found to change upon heating into two new, pure substances, B and C.
A $\rightarrow$ B + C
Neither B nor C can be decomposed by chemical means. From this we may conclude that ________.

Question

Quizplus · Accepted Answer

B and C cannot be decomposed further, indicating they are elements. A decomposes into B and C, so A must be a compound made of elements B and C.

A Pure Substance a Is Found to Change Upon Heating →\rightarrow→

A Pure Substance a Is Found to Change Upon Heating $\rightarrow$