General Chemistry Answers

Balance the following equations.

1. Fe + O2 → Fe2O3

2. CS2 + Cl2 → CCl4 + S2Cl2

3. Fe + H2O → Fe3O4 + H2

1. The empirical formula of a compound of Carbon and Hydrogen is CH2. Its molar mass is 100g/mol. Determine the molecular formula of the compound.

Solve the ff problem. Refer to the given mass numbers in computing for the molar mass.

Molar Numbers:

Fe= 55.85

O=16

C=12.01

S=32.07

Cl=35.45

H=1.01

2. In a certain experiment 30.0g CS2 is used in the reaction. The experiment is performed and CCL4 is collected and its mass is found to be 16.3g. What is the percentage yield for the reaction?

Calculate the molality of a 6.55 kg sample of a solution of the solute CH 2 Cl 2 dissolved

in the solvent acetone (C 3 H 6 O) if the sample contains 876 g of methylene chloride

What is the electron configuration, noble gas configuration, and orbital diagram of potassium?

What is the electron configuration, noble gas configuration, and orbital diagram of chlorine?

What is the electron configuration, noble gas configuration, and orbital diagram of phosphorous?

6NaNO3 + Al2O3 → 2Al(NO3)3 + 3Na2O

If 82.1g NaNO3 reacts with 100g Al2O3, what is the limiting reactant?

Calculate the initial concentration of Fluoroacetic acid in a solution that has the same pH as a 0.00865 M solution of HCl

Determine the spontaneity of the dissociation of ammonium nitrate (NH4NO2), the compound used in

cold packs:

NH4NO3(s) NH4+(aq) + NO3−(aq)

ΔΗ° = 25.7 kJ/mol; AS = 0.108 kJ/K•mol

a. Calculate the AG for the reaction at 25°C.

b. Does the reaction lead to an increase or decrease in the disorder of the system?

c. Is the reaction spontaneous or nonspontaneous at 25°C?