Other Chemistry Answers

Solution X containing 0.020 mol of iron(II) sulfate requires 22.5 mL of potassium manganate(VII) for a complete reaction. The equation for the reaction is: 5Fe²⁺ + MnO^4- + 8H⁺ → Mn²⁺ + 4H₂O + 5Fe³⁺. What is the molarity of the KMnO₄ solution? (5 Points)

How much table salt should be added to 300 g water to lower its freezing point to -2.00°C? 

State Le- Chatelier’s principle and for the following reaction at equilibrium

2SO↓2(g) + O↓2(g) ⇌ 2SO↓3(g) ∆H=-198 kJ

Predict the effect of

i. Adding SO↓2(g) at equilibrium

ii. Decreasing the temperature

iii. Reducing the volume of the container to half

iv. Adding an inert gas under conditions of constant pressure.

Define equilibrium constant and for the following reaction

2NH↓3(g) ⇌ 2N↓2(g) +3H↓2 (g)

i. Write the expression for Kc.

ii. Relate Kc to Kp, and

iii. Relate Kc to Kx

Calculate the mass of carbon in 10.00 g of glucose (C6H1206). Show the step by step process.

1. What makes network solids unique compared to other solids?

2. What is the importance of network solids in modern times? Explain your answer.

Calculate the percentage abundance of Br-80 and the average atomic weight of bromine in a brine sample that contains 50.54% Br-79 (78.918 amu) and Br-80 (80.916 amu). Express percent abundance up to 2 decimal places

A gas has a volume of 3.00 L and a pressure of 75.4 kPa. when the volume expands to 4.00 L and the pressure drops to 72.7 kPa, the gas temperature is 0C. what was the initial temperature of the gas?

What is the mass of technical calcium carbide with a mass fraction of 12% required for the production of acetylene with a volume of 6.72 l (nu)?

find the number of millimoles of solute in:

a. 2.00 L of 2.76 x 10-3 M KMnO4

b. 250 mL of a solution that contains 4.20 ppm of CuSO4