Would you expect a carbon atom to have the same mass as an oxygen atom

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Ab c or d ? i’m not sure what the answer is