Which sample is a pure substance?
a a test tube of zinc oxide
b a container of zinc and oxygen
c a flask of pond water
d a jar of soil

Non renewable resources like petroleum eventually

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2