FORMULA

Question 1

how do you calculate the number of molecules/atoms

Answer 1

𝑁=𝑛×𝑁a
N = number or molecules/atoms
n = moles
Na = Avogadro’s Constant

Question 2

how do you calculate the amount of the substance (Moles)

Answer 2

n = m / Mr
n = Moles
m = Mass
Mr = Molar mass

Question 3

how do you calculate the amount, in mol, of a gas at RTP (room temp and pressure)

Answer 3

n = V / Vm
n = moles
V = volume (dm^3)
Vm = molar gass volume (dm^3 mol^-1)