Other Chemistry Answers

140 g of S2Cl2 was collected from the reaction of 640 g of Sulfur and 142 g of Chlorine. How much of the excess reactant was left over?

What is the percentage composition of Na2SO4?

A solution of Ba(OH)2 was standardized against 0.1016 g of primary standard benzoic acid C6H5COOH Calculate the concentration of if the end point was 20.89 mL.

1. 1.275 liter of saturated silver chloride AgCl contains 0.01892 g of

dissolved AgCl at 25℃. Calculate the Ksp for AgCl.

2/ Balance the redox reaction in a) acidic and b) basic solution.

Fe2+ + Cr2O7 2- -> Fe3+ + Cr3+

3 A sample containing iron is titrated with a 0.025 M potassium

dichromate K2Cr2O7 solution with H3PO4/H2SO4. The titration required

26.74 mL of K2Cr2O7 for 1.45 g sample. What is the percent iron in the

sample? (Use the balanced reaction in #2).

Identify oxidizing agent and reducing agent in the reactions.

1. 2Na₂S₂O₃ + I₂ → Na₂S₄O₆+ 2Nal

2. N₂+ 3H₂ → 2NH₃

3. 2FeCl₃ + H₂S → 2FeCl₂ +S + 2HC1

4. 2 Cr³ + H₂O+ 6CIO₃ → Cr₂O₇² + 6CIO₂ + 2H+

5. 3Mg + N₂ → Mg₃N₂

The reaction moves in backward direction, when the ratio of the concentrations of the products & the

reactant is:

* Equal to Kc

* Greater than Kc

* Lesser than Kc

* 10-13

In a titration, 10.0 ml of H2SO4 is required to neutralize 0.0400 mol of NaOH. From this data, the [H2SO4] is?

B. Nitrous Oxide (N_{2}*O) commonly known as laughing gas, is easily oxidized to dinitrogen tetraoxide (N_{2}*O_{4}) . If the equilibrium concentrations of f N 2 O? , O_{2} and f*N_{2}*O_{4} are 0.089M, 0.064M, and 2.5M, respectively, what is the equilibrium constant k_{c} for the reaction?

2N 2 O (g) +3O 2(g) Leftrightarrow2N 2 O 4 8)

What is the PH of a solution whose hydroxide

-3

ion (OH) is 0.003 moldm

how many atoms of calcium are in 6 moles of Ca?