Using improved chemistry equipment in the late 1700s, chemists observed that mass is neither created nor destroyed in a chemical reaction. this scientific law is called the law of

Can someone me with these questions plz.

When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?