General Chemistry Answers

Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to the reaction: PCl3(g) + Cl2(g) → PCl5(g). An equilibrium mixture at 450 K contains the following:

PPCl3 = 0.202 atm

PCl2 = 0.256 atm

PPCl5 = 3.45 atm

What is the value of Kp at this temperature?

In the coal-gasification process, the reaction is: CO_(g) + H₂O_(g) ⇌ CO_2(g) + H₂S_(g) + H_2(g). With 0.35 mol of CO and 0.40 mol of H₂O placed in a 1.00-L reaction vessel, there is 0.19 mol of CO remaining. Determine the K_eq at the temperature of the experiment? 

Dinitrogentetraoxide partially decomposes according to the following equilibrium: N₂O_4(g) ⇌ 2NO_2(g). A 1.00-L flask is charged with 0.04000 mol of N₂O₄. At equilibrium at 373 K, 0.0055 mol of N₂O₄ remains. Determine the K_eq for this reaction.

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Calculate the number of grams of solute necessary to prepare a 500.0 mL of a 0.10M

sodium hydroxide solution.

Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaH) to produce aqueous sodium bromide (NaBr) and liquid water (H, 0).

Suppose 75.2 g of hydrobromic acid is mixed with 14. g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the

chemical reaction. Be sure your answer has the correct number of significant digits.

Gaseous butane (CHa (CH,), CHg) will react with gaseous oxygen (0.) to produce gaseous carbon dioxide (CO,) and gaseous water (H, O). Suppose 4.1 g

of butane is mixed with 19.7 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the

correct number of significant digits.

A gas mixture is made by combining 7.1 g

7.1 g each of Ar,

Ar, Ne,

Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 16.83 L.

16.83 L.

What is the molar mass of the unknown gas?

A 1.55 g

1.55 g sample of an unknown gas at 67 

∘

C

67 ∘C and 1.05 atm

1.05 atm is stored in a 2.95 L

2.95 L flask.

What is the density of the gas?

How many grams of NH

4

Cl

NH4Cl will be formed by this reaction?