4 Select the correct answer.
Which statement best describes how chemical equations demonstrate conservation of mass?
OA.
The number of reactants is the same as the number of products,
OB.
The compounds are the same on each side of the reaction.
O C.
The number of atoms of each element is the same on each side of the equation.
hodation
OD.
The state of matter is the same on each side of the equation,

the volume of fluid displaced would equal the volume of the gas. use a gas syringe - this is a laboratory instrument that can be used to withdraw a certain volume of gas from a closed system or to measure the volume of gas from a chemical reaction.

beta decay is the answer

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