due in an hour pls help quick !

Calculate the molar mass in g/mol of a gas if 0.168g occupies 0.92L at 98 Torr and 39C. Express your answer to the correct number of significant figures and include units in your answer. QUESTION 3 A weather balloon filled with helium is launched in Alaska on a clear day when the temperature is 19.0 C and the atmospheric pressure is 758 torr. Before launch, the balloon has a volume of 75.0L. What is the volume of the weather balloon at STP? Express your answer to the correct number of significant figures, and include units with your answer. QUESTION 4 Consider the following thermochemical equations: 3C(s)+4H2(g)C3H8(g)C(s)+O2(g)CO2(g)2H2(g)+O2(g)2H2O(l)Hrxn=104kJHrxn=394kJHrxn=572kJ Calculate the value of H (in kJ ) for: C3H8(g)+5O2(g)3CO2(g)+4H2O(l) A. +2430kJ B. 2430kJ C. None of the other choices provided represents the enthalpy change for the combustion of propane. D. 862kJ E. +862kJ