N has a mass of 26.19 H has a mass of 8.39 g and Cl has a mass of 65.42. Find the emperical formula?
2 Answers
You must divide every mass of each element for its molecular weight: N (26,19/14,007= 1,87), H (8,39/1,008=8,32, but maybe they where 7,39 g so you obtain 7,39/1,008=7,33) , Cl (65,42/35,45 =1,84). Now you divide by 4 the rate of H 7,33/4 = 1,83 and you obtain about the same number. This means that the empirical formula of the compound is NH4Cl (ammonium chloride)
The empirical formula is
Make sure the masses of all the elements add up to 100 g.
Determine moles of each element using the molar mass.
Determine mole ratios by dividing the moles for each element by the lowest number of moles.
N:
H:
Cl:
Multiply the mole ratios times 2 in order to make the mole ratio for oxygen a whole number..
Empirical formula is