Question

1. What is the mole fraction of He in a mixture of He, Ar and Ne. The partial pressures are He = 200.torr, Ar = 375 torr and Ne = 265 torr ?

   		.238
   		.407
   		.154
   		238

1. How manty g of HCl are needed to make 250. mL of .110 M HCl ?

   		1.00 g
   		100. g
   		2.00 g
   		.500 g

1. Determine the limiting reagent in the following reaction if 4.35 g of TiO₂ , 5.67 g of C and 5.96 g of Cl are reacted.

   3 TiO₂ + 4 C + 6 Cl₂   → 3 TiCl₄ + 2 CO₂ + 2 CO

   		TiO2
   		C
   		Cl2

1. What is the final pressure if a gas having a constant volume has a pressure of 2.00 atm at 40.^oC, has the temperature is increased to 120.^oC.

   		5.08 atm
   		3.75 atm
   		2.51 atm
   		6.06 atm

1. For the following reaction

   3 O₂ (g)   → 2 O₃ (g)   ΔH = +286 kJ

   What is the ΔH when 16.0 g of O_{3 are produced}

   		47.7 kJ
   		143 kJ
   		95.3 kJ
   		95.5 kJ

Answer 1

0.238 Xhe 200 2004 375 +265 Mx Vol. - Moles of He 25oxo.ll 0.0275 1o0o 0.0975 2) G.M - 1.00 G.M M.M 36.5 ; 3 Tilly + 200g 2co - 3 Tioz 4.c t + 6 Cla 4.35 80 5.67 12 5.96 71 timiting reagent is 0.47 0.084 2 0.054 If PV = nRT P2 2) ? Ti T2 Pa 393 Pro 2.51 21 313 30g 2 Oz DH = + 286 KJ Moles of 03 2 3x16. 3 AH 47.7 KI 28 6 x 1 2x3 +