Which pair of molecular formula and empirical formula is correct Molecular formula
Empirical formula
(a) As2Os
AsO3
(b) SO2
S₂04
(c) C₃H6
CH3
(d) C6H1206
CH2O

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.