General Chemistry Answers

what is the dominant intermolecular force for each mixture?

NaCl/water

naphthalene/kerosene

napthalene/acetone

Kerosene/acetone

kerosene/ethanol

Ethanol/water

1. What mass of Al will react with 150g of Fe2O3? 

What is general rule determining which polarities of solids dissolve in which polarity of liquids? 

What is the mass of chlorine-37 (24.23%), if the mass of chlorine-35 (75.77%) is 34.969g and the atomic mass of chlorine is 35.453 g?

How many liters of O₂ at STP is needed to completely burn 20.0 L of butane(C₄H₁₀), with this reaction?

2C₄H₁₀+13O₂ ---> 8CO₂+10H₂O

1.) Write the equilibrium expression and calculate the K_eq for H₂ (g) + CS₂ (g) ⇌ CH₄  (g) + 2 H₂S (g)   

Concentrations at equilibrium:

[CH₄] = [H₂S] = 1.3 x 10^-2 mol/L

[H₂] = 4.4 x 10^-1 mol/L

[CS₂] = 1.1 x 10^-3 mol/L

2.) When acetic acid reacts with water, these equilibrium concentrations are found. [CH₃COOH] = 0.20mol/L, [CH₃COO^-] = 0.0019mol/L, [H₃O⁺] = 0.0019mol/L. The equation for the reaction is

CH₃COOH (aq) +   H₂O (ℓ)  ⇌  CH₃COO^-  (aq) + H₃O⁺  (aq)

What is the equilibrium constant expression for this reaction and what is the value of the equilibrium constant? 

3.) Calculate the [NO₂] for

2 NO (g) + O₂ (g) ⇌  NO₂  (g)     

If [NO] = 4.00 x 10^-3 mol/L and [O₂] = 2.00 x 10^-3 mol/L at equilibrium, and the equilibrium constant is 2.34 x 10^-2 at 500°C. 

What does reversible mean in thermodynamics?

6.854 ×× 103 mol glucose, C6 H12 O6

?C2 + 2O2 → 2 CO2

What is the oxidation and reduction reaction to Sc(s) + Cr₂O₇²⁻(aq) → Sc(OH)₃(s) + Cr(OH)₄⁻(aq)?