Question

When 359.0 g of solid sulfur (S8) reacts with oxygen gas in the air, they generate sulfur dioxide gas. If the gas is filling a mylar balloon at 400 K and 0.916 atm, what volume will it occupy?

______ L

Answer 1

Establish and balance the equation:

S₈ + 8O₂ -> 8SO₂

-calculate the number of SO₂ moles that the 359.0 g of S₈ are going to produce:

+change g of S₈ to moles with molecular mass:

*calculate the moles of SO₂ by stoichiometry:

++++++++++++++++++++++++++++++++++++++++++

-use PV=nRT to calculate the volume:

Data:

T	400 K
P	0.916 atm
n	11.196 moles SO2
R(constant)	0.08206 atm*L/mol*K

*rewrite the equation as : and substitute values:

V=401.2L