# What is the mole fraction of He in a mixture of He, Ar and Ne. The...

###### 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 ?

 0.238 0.407 0.154 238
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 O3 are produced

 47.7 kJ 143 kJ 95.3 kJ 95.5 kJ

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