Question

both carbon dioxide and water are pure substances how are they similar to each other?
A: Both substances have a set ratio of atoms that cannot be separated by physical means.
B: Both substances have a set ratio of atoms that can be separated by physical means.
C: Both substances have the same physical and chemical properties.
D:Both substances have the same physical properties, but different chemical properties.

Answer 1

C is the answer if im correct, had this question not to long ago.

Answer 2

the answer is C: Both substances have the same physical and chemical properties.