Molecular formula for sulfur vapor?

Question

density of sulfur vapor at 445 C and 755 mm(Hg) is 4.33 g/mL.

Answer 1

I think you meant 4.33 g/liter and  NOT 4.33 g/mL

Calculate the moles per 1 liter-

n = PV/RT = 0.9934 atm x 1.000 L / (0.08206 x 728 K)

n = 0.01663 moles per liter

0.01663 moles = 4.33 g/molar mass

molar mass = 260.4

260.4 / 32.066 = 8.1

S8 = molecular formula of sulfur vapor