Question

elect the compound with the greatest molar mass.silicon tetrabromidesilicon tetrafluoridecarbon tetrafluoridephosphorus trichloride

Answer 1

The compound with the greatest molar mass is silicon tetrabromide

Step-by-step explanation

Using the atomic masses of C, F, Si, P, Cl, and Br from the Periodic table, the molar masses of the compounds are calculated below

C = 12, F = 19, Si = 28, P = 31, Cl = 35.5 Br = 80

Molar mass of silicon tetrabromide, SiBr₄ = 28 + (4 x 80) = 348 g/mol

Molar mass of silicon tetrafluoride, SiF₄ = 28 + (4 x 19) = 104 g/mol

Molar mass of carbon tetrafluoride, CF₄ = 12 + (4 x 19) = 88 g/mol

Molar mass of phosphorus trichloride, PCl₃ = 31 + (3 x 35.5) = 137.5 g/mol

Therefore, the compound with the greatest molar mass is silicon tetrabromide