General Chemistry Answers

The decomposition of PCl5 is shown below:

PCl5(g)⇌PCl(g) + Cl(2)

Kc 3 = 0.029 at 85°C

Find out if the reaction proceeds forward, backward, or if the system is at equilibrium when a 1 liter

container is filled with 0.4 mole PCl5, 0.5 mole PCl3, and 0.2 mole Cl2.

If we start with 0.00240 M NOBr, what concentration of NOBr will remain after 5.00 minutes of reaction? The reaction is second order.

A mixture of 0.20 M acetic acid and 0.30 M sodium acetate is give. Calculate the pH of the medium if the pKA of the acetic acid is 4.76

You burn a 15g jellybean to warm 50 mL of water, which increases the temperature of the water 25 °C. How many calories of heat are transferred from the jellybean to the water? Assume there is no heat loss.

A solution is made by dissolving 0.100 mole of NaCl in 8.60 mole of water.

a) What is the mole fraction of the solute?

b) What is the mass percent of the solute?

c) What is the molality of the solute?

A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the

normality of this solution? Water is added to dilute this solution to a solution of

3.03% by weight H2SO4 (SG= 1.020). What is the new normality of the resulting

solution and how were they mixed? (Assume 100 mL of the original solution was

used.)

Use the localized electron model to describe the bonding in hydrogenvcyanide and phosgene(COCl2)

For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give expected hybrid orbitals on the central atom, and predict the overall polarity. 

       a. OF2    b. AsF5   c. IF5   

Describe the formation of outer orbit complex [Ni(H2O)6]2+ ion using VBT

Urea, a compound formed in the liver, is one of the ways humans excrete nitrogen.

The Lewis structure for urea is

Using hybrid orbitals for carbon, nitrogen, and oxygen, determine which orbitals overlap

to form the various bonds in urea.