Question

6. a. Calculate the density of sulfur hexafluoride gas at 709 torr and 23 C.

b. Calculate the molar mass of a vapor that has a density of 7.125 g/L at 11 ∘C and 745 torr .

c. Calcium hydride, CaH2, reacts with water to form hydrogen gas: CaH2(s)+2H2O(l)→Ca(OH)2(aq)+2H2(g) This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired. How many grams of CaH2 are needed to generate 54.5 L of H2 gas if the pressure of H2 is 813 torr at 20 ∘C?

Answer 1

mdon mags S - N 8md P =0 0 0933 at T 23 t271 7 296 K. b.D6 0923/6.0 8206%246 d s.61 31L T= 1273 > 28YK 28१ /०.१४४ Molar mas -2.1258 0 .6820 6% -PVIRT= 13 torr x lat m/4t61097) EY.L) ma ИHp 2.425 Thon 2.425mel H Imd caH/2md t)x CYL078 CaMmed cat