Question

In a chemical reaction, the mass of the products _____ the mass of the reactants.

is greater than
is less than
is equal to
has no relationship to

Answer 1

is equal to. Regardless of the product that you want to keep, since mass is like energy, it can't be created or destroyed. Therefore it always remains the same.

Answer 2

Answer: is equal to

Step-by-step explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. The mass has to be same on both sides of the reaction and to make this happen, the number of atoms of every element must be equal in reactants and products.

`2H_2+O_2\rightarrow 2H_2O`

2 moles of hydrogen weigh=
`2* 2g/mol=4g`

1 mole of oxygen weigh = 32 g

Mass of reactants = 36 g

2 moles of water weigh=
`2* 18g/mol=36g`

Mass of products = 36 g

Thus mass of reactants = mass of products = 36 g