Chemical Calculations (mol)

mole → amount of substance that contains as many particles as the substance as there are atoms in 12 g of carbon-12

Molar Mass

n = m/Mr (amount of substance in a given mass)

n = mols

m = total mass (given)

Mr = molar mass (4×5 + whatnot thingy)\

n = N/Na (amount of substance if number particles is known)

n = amount (or quantity), mol

N = number of particles

Na = 6,02 × 10²³

alternative → N = n x Na (for findinh number of particles)

n = V/Vm (relationship between amount of gas, volume and molar volume) (not for common test)

n = amount (quantity) gas, mol

V = gas volume (STP), dm³

Vm = molar gas volume → 22,4 dm³.mol^-1

alternative → V = n.Vm

n = C.V (not for common test)

n = mols

C = concentration

V = volume