*PLEASE HELP* *IM SO STUCK ON THIS TEST I DONT UNDERSTAND ANY OF IT*
Which statement is a correct statement for the law of conservation of mass?
A.The total mass decreases during a chemical reaction
B.The total mass increases in a chemical reaction
C.The total mass remains the same during a chemical reaction
D.The total mass is unpredictable in a chemical reaction
Which element(s) are not balanced in this equation?
Fe2O3+3 CO -> Fe+3 CO2
A.Only the O is unbalanced
B.C and O are bothe unbalanced
C.Fe and O are both unbalanced
D.Only the Fe is unbalanced
remember that mass changes only occur because a gas is being released into the atmosphere or because a gas from the atmosphere is being used as a reactant -no atoms are created or destroyed only rearranged :-)
