Chemistry Answers

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

how many moles of o2 are produced when 1.26 moles of h2o is reacted

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.

The reaction of ammonia gas to nitrogen monoxide gas yields nitrogen gas and water vapor. How many moles of each reactant will be present if 13.8 moles of nitrogen gas is produced?