Chemistry Answers

5. Calculate the equilibrium constant K for the following reaction at 25°C from

standard electrode potentials. Fe

3+

(aq) + Cu(s) → Fe

2+

(aq) + Cu

2+

(aq). The equation is not balanced. Use standard reduction electrode potentials.

4. Calculate the standard free-energy change at 25°C for the following reaction. 3Cu(s) + 2NO3(aq) + 8H+

(aq) → 3Cu

2+

(aq) + 2NO(g) + 4H2O(l). Use standard reduction electrode potentials.

Describe an experiment to show preparation and collection of oxygen gas from sodium peroxide

1. Iodic acid, HIO3, can be prepared by reacting iodine, I2, with concentrated nitric

acid. The skeleton equation is:

I2(s) + NO3

-

(aq) → IO3

-

(aq) + NO2(g). Balance this equation using the half reaction method.

How many moles present in 23.3 Kg Ar ?  

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1. Calculate the vapor pressure of a solution made by dissolving 65.0 g CaCl2, C6H12O6, in 655 g of water. The vapor pressure of pure water is 47.1 torr at 37°C.

2. What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.2000? The vapor pressure of water is 35.576 mmHg at 25 °C.

complete the equation in your answer booklet for the decay of phosphorus-30 by writing a notation for the missing product.

List the radicals you know

exactly 15.6 g of cab4 compound was dissolved in 1500 cm³ of water. calculate the total number of b atoms in 500 ml of the solution.