Answer Happy

A sample of matter contains two different elements joined
together to form molecules. There is only
one type of molecule present in the sample. Heat is applied to the
sample and a change occurs. Bonds of
the reactant are broken and new bonds form to make products. What
can we say about the sample and
how it changed?
This was a compound that underwent a physical change
This was a compound that underwent a chemical change
This was a homogenous mixture of elements that underwent a physical
change
This was a homogeneous mixture of elements that underwent a
chemical change