Molar and molecular weight of IBr3

• Relative molecular weight of IBr3: 366.61647
• Molar mass of IBr3: 366.61647 g/mol (0.36662 kg/mol)

Calculation of the relative molecular and molar mass of IBr3

• Mr[IBr3] = Ar[I] + Ar[Br] * 3 = 126.90447 + 79.904 * 3 = 366.61647
• Molar mass (kg/mol) = Mr[IBr3] : 1000 = 366.61647 : 1000 = 0.36662 kg/mol

IBr3: percent composition by element

• Iodine (I) = 126.90447 : 366.61647 * 100 = 34.615 %
• Bromine (Br) = 239.712 : 366.61647 * 100 = 65.385 %

Molar mass calculator