he mass of 0833 moles of the compound HXO4 is 1207 g Identif

he mass of 0.833 moles of the compound HXO4 is 120.7 g. Identify X

Solution

Molecular weight of HXO4 = mass/moles

= 120.7g / 0.833 mol

= 144.897 g/mol

Molecular weight of HXO4 = 1 + x + 4*16

65 + x = 144.897

x = 79.9

Bromine has molecular weight = 79.9

X = Br

Compound = HBrO4