Determine the molecular formula of a sample of gas containing 40.0% of carbon, 6.67% of hydrogen and 53.3% of oxygen by mass. The molecular mass of the compound is 180.

The answer is b on plato.

Of course: ) what’s your name ?

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.