In a balanced chemical reaction, the total mass of the products always equals the a. molar mass of the reactants. c. total mass of the reactants. b. atomic mass of the reactants. d. proportional masses of the reactants.

c. total mass of the reactants.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

For Example:

Mass of hydrogen =

Mass of oxygen =

Mass of water =

Mass of products = mass of water = 36 grams

Thus mass or reactant = mass  of hydrogen + mass of oxygen = 4 g + 32 g = 36 g

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer