State the law of conservation of mass and explain how a balanced chemical reaction equation supports the law.?

Question

When we move a solid object, the object retains its shape, density, and volume. The mass of the object, therefore, remains a constant between state and state.
I am correct? :)

Answer 1

Urm, the mass would not change, the weight may though...

The law of conservation of mass/matter, also known as Law of Mass Conservation (or the Lomonosov-Lavoisier law), states that the mass of a closed system of substances will remain constant, regardless of the processes acting inside the system. An equivalent statement is that matter changes form, but cannot be created nor destroyed. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products.

In chemistry, so long as no nuclear reactions take place, a special form the conservation of mass also holds in regard to the conservation of the mass (and number of atoms) of each chemical element. In most basic chemical reactions and equations, atoms of no element may be created or destroyed. They must only come out exactly as found in the reactant side of an equation, with a different location in regard to their new chemical formula, as may be found on the product side of an equation.

Answer 2

The Law of Conservation of Matter(or Mass) says that you can not create or destroy matter. So when you give an equation(from the word equal) there has to be the same numbers and kinds of elements on each side.

When an object is moved it does keep its shape, volume, mass and density.

Between state to state the density does change and the volume but not the mass.Gas is much less dense than liquid or gas.The volume expands.
The mass will always stay the same where ever you find the mass. The weight may change , determined by gravity.