The mass of an atom expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom

partial mass/ 100%

(26.98g) (1mole/6.02 e23)= 4.48 e23

It is defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance.

determines the number and types of atoms in a molecule.

(23.50gC) (1moleC/12.01gC)= 1.96 moleC

the volume occupied by one mole of a substance (chemical element or chemical compound) at a given temperature and pressure.

shows the ratio of elements in a compound

1.764 x 10*23 mole

the smallest unit of a substance that can be broken down without altering the composition

The number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023.

25x12.01)/ ((25x12.010)+(52x1.01))
* (300.25g/mole) / (352.77g/mole)
= .85 = 85%

A compound, typically a crystalline one, in which water molecules are chemically bound to another compound or an element.

Two equal volumes of gas, at the same temperature and pressure, contain the same number of molecules.

formula for hydrate= Mo2S5 x 3H2O