General Chemistry Answers

What products are produced by the electrolysis of an aqueous solution of iron (II) nitrate?

In the reaction N2+3H2>2NH3, what is the mole ratio of hydrogen to nitrogen

A 12.0 L balloon at 84 C is cooled until it becomes 5.0 L. To what temperature was the balloon cooled?

Write the steps in the complete ionization of the following polyprotic acids.

A. H2CO3

B. H3BO3

A certain concentration method works best when the analyte’s concentration is approximately 10 ppb.

a.) if method requires a sample of 0.5 mL, about what mass of analyte is being measured?

b.) if the analyte is present at 10% w/v, how would you prepare the sample for analysis?

c.) Repeat for the case where the analyte is present at 10% w/w.

d.) Based on your answers to part (a)-(c), comment on the method’s suitability for the determination of major analyte?

if 18.8 ml of 1.25 m sodium hydroxide solution is necessary to neutralize 25.0 ml of hydrochloric acid solution to a phenolphthalein end point, calculate the molarity of the hydrochloric acid solution

Predict whether the entropy change of the system in each of the following is positive or negative.1. O2(g) → 2O(g)2. N2 (g, 10 atm) → N2 (g, 1atm)3. 6CO2(g) + 6H2O(g) → C6H12O6(g) + 6O2(g)4. 2 H2 (g) + O2 (g) → 2 H2O (l)5. NH4Cl (s) → NH3(g) + HCl (g)

Given the reaction:

2 NaOH + H₂SO₄ ⟶

  Na₂SO₄ + 2 H₂O 

How many moles of sodium sulfate (Na₂SO₄) reproduced when 9.9 moles of sodium hydroxide (NaOH) are reacted with excess sulfuric acid?

For the following reaction, 108 grams of silver nitrate are allowed to react with 23.6 grams of copper .

silver nitrate(aq) + copper(s)  copper(II) nitrate(aq) + silver(s)

What is the maximum amount of copper(II) nitrate that can be formed?  grams

What is the FORMULA for the limiting reagent?

What amount of the excess reagent remains after the reaction is complete?  grams

calculate the time required to deposit 56g of silver from a silver nitrate(AgNO3)solution using a current of 4.5amper