1 answer

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 ?

    .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 O3 are produced

    47.7 kJ

    143 kJ

    95.3 kJ

    95.5 kJ


Answers

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

.

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