If the mass of elements before a chemical reaction is 30 grams , after the chemical reaction , the mass will be _

A.) 28g
B.) 30 g
C.) 32g
D.) 0 g

1 answer

If the element is 30 g before the reaction it will be 30 grams after a reaction. The TOTAL mass may change if the element has combined with another element but the initial element still will be 30 g.