
Answer:
V of Sulfur tetrafluoride is  17.2 L
Explanation:
Given data;
T = -6°C =  267K                 [1° C  = 273 K]
n = 786 mmol of SF4 which is 0.786 mol
P = 1 atm
from ideal gas law  we have
PV = nRT
where n is mole, R is gas constant, V is volume
[tex]V = \frac{nRT}{P}[/tex][tex]V = \frac{0.786 mol \times 0.082 atmL/mol K \times* 267K}{1atm} = 17.2 L[/tex]
V of Sulfur tetrafluoride is  17.2 L