General Chemistry Answers

What is the Volume of the water vapour if 3.2 grams of water vapour is observed at 22 C

and 125 kPa. ?    R = 8.31 L kPa/ K mol 

If you had a stock solution of 15 M sulfuric acid, what should you do if you wanted to make1.0 litre of 5.0 M sulfuric acid from this stock solution?

I need to make 300 mL  a 0.123 mol/L solution of HCl. The only solution of HCl I have in the cupboard is 12.0 mol/L.  How can I make the solution I want?

Explain how you would make 250 mL of a 0.200 mol/L solution of copper sulfate from the 

     solid compound.  (3 marks)

A chemist prepares a sample of hydrogen bromide and finds that it occupies 216 ml at 64 c and 535 torr. what volume would it occupy at0 c at the same pressure? answer in units of ml

Give at least 2 examples of covalent compounds that can be found in nature or used in everyday life .Yhey must include the following information:

a.Brief information about the use of the covalent compound

b.chemical formula and chemical name of the covalent compound

c.Structure of the compound

At equilibrium, the concentration in moles/L of N2, H2, and NH3 at 300 C are 0.25, 0.15, and 0.90, respectively. Find K, for the reaction

The reaction 2 NO(g) ---- N2(g)+O2(g) has a Kc value of 2400 at 2000 K. If 0.850 M each of N2 and O2 are initially present in a 3.00-L vessel, calculate the equilibrium of No, N2 and O2

• Calculate the concentration of OH - ions in a 1.4 x 10^-3 M HCl solution.
• Calculate the pH of the buffer system made up of 0.15 M NH₃ and 0.35 M NH₄Cl.

Is the ionization energy of phosphorus greater than the ionization energy of sulfur? If so, is the electron affinity of phosphorus also greater than the electron affinity of sulfur? Thank you.