General Chemistry Answers

Calculate the Gibbs energy for the following condition K = 7.6 x 10^-9, T = 78˚C

Calculate the reaction entropy (S°rxn) for the following reaction: 3 NO₂ + H₂O 2 HNO₃ + NO

Calculate the reaction entropy (S°rxn) for the following reaction: 2 LiOH + CO₂ Li₂CO₃ + H₂O

Calculate the reaction entropy (S°rxn) for the following reaction: 3 NO₂ + H₂O 2 HNO₃ + NO

Predict the trend of entropy in the following scenario: More molecules of gas

The following acids are arranged in order of increasing strength:

HClO< CH₃COOH < HNO₂ < HI  

The correct order of the increasing strength of their conjugate bases is:

Write the equilibrium constant expression

1.     H2(g) + I₂(g) ⇌ 2HI(g)

2.     3O₂(g) ⇌ 2O₃(g)

3.     2CO₂(g) ⇌ 2CO(g) +O₂(g)

4.     CH₃COOH (aq) +C₂H₅OH ⇌ CH₃COOC₂H₅(aq) +H₂O(l)

5.     AgCl(s) ⇌ Ag+ (aq) Cl (aq)

What mass of nitrogen is needed to react with 21.25 g of hydrogen?

A mass of 200 g of Zn reacts with 800.0 mL of 4.00 M HCl to form Zn(Cl)₂

Zn(s) + HCl (aq) → Zn(Cl)₂ (aq) + H₂ (g)

1.1      Balance the equation of the chemical reaction                                                                                   

1.2      Identify the liming reactant.                                                                                                                                  

1.3      Determine the excess reactant remaining after the reaction was complete.                                      

1.4      Calculate the theoretical yield.                                                                                                                             

1.5      Calculate the percentage yield for the production of H2. The actual yield obtained for H₂ was 1.46 g.

1. What amounts of each species is expected to be present at the end of the reaction between 3.2 g of solid gallium and 3.2 g of gaseous oxygen? 
2. Elemental copper and HNO₃ react to form copper (II) nitrate, nitrogen dioxide, and water. What is the percent yield of the reaction where 0.185 Mg of copper and 0.0125 Tg of HNO₃ react to form 1.95 x 10²⁰ fg of nitrogen dioxide?
3. When 1.25g of H₂Se gas is bubbled into a solution containing 2.00g of potassium hydroxide, how many grams of the potassium-containing product forms, assuming that the reaction proceeds with 92.0% yield? 
4. Phosphorous and hydrogen react to form 4.00 g of product with 35.5 % yield. If 1.05 g of hydrogen remained unreacted, how much phosphorus must have been present at the start?
5. How many of each of the spectator ions are present after the reaction of 1.0g calcium sulfate and 1.0g potassium phosphate?