Answer:
d. oxygen is a pure substance and rocks are mixtures
Answer:the mass of the gases and ash should be equal the mass of the initial stack of newspapers, there are equal number of atoms on both sides
Explanation:no matter what form the newspaper would take the mass stays the same because all you did is burn it, conserve means that each atom's mass will stay the same no matter what.
Answer:
The less mass in a given volume of air the less dense the air is going to be.
The answer is Liquid freezing
