Which statements below describe the law of conservation of mass?
1. mass cannot be created or destroyed.
2. mass is conserved by decreasing the number of atoms in the product.
3. number of atoms on the reactant side must equal number of atoms on the product side.
4. mass cannot be transferred only created.

1.Mass cannot be created or destroyed.

Explanation:

We have to find the statement which describe the law of conservation of mass.

Law of conservation of mass:In an isolated system, mass can neither be created nor destroyed.

Mass of closed system does not change over time.

The mass of reactants is equal to mass of products in chemical reaction.

1.Mass cannot be created or destroyed.

It is describe the law of conservation of mass.

1.Mass cannot be created or destroyed.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000