Other Chemistry Answers

Determine the mass of a sample of Vitamin D, C 27 H 44 O 2 , if it contains 2.4 x 10 22 hydrogen atoms.

What will be the pOH of a solution that contains 0.2 moles of potassium hydroxide and 0.05 moles of sulfuric acid in 100 cm3 of solution? (Complete dissociation).

What mass of HF must be used to produce 1.5L of an aqueous solution with a pH of 2.00? 

According to the Bronsted-Lowry theory, which of the following would you expect to act as an acid? Which as a base? 

(A) CH₃O^_

(B) CO^2-₃

(C)HAsO^2-₄

Calculate the concentration of OH ions when reacting 150 cm3 of a solution of a dihydroxylic base, concentration 0.1 mol / dm3 with 90 cm3 of a solution of a troprotic acid with a concentration of 0.1 mol / dm3!

Calculate the concentrations of H +, OH-, pH, pOH of aqueous sulfuric acid solution with a concentration of 0.0049 mol / dm3 assuming complete dissociation!

Calculate the mass of the solid produced formed when 1.5 L of 0.50 M NaOH is combined with 2.0 L 0.10 M MgCl2.

How much energy in kJ is released when 10.21 g of aluminum react with an excess of copper oxide?

3 CuO + 2 Al -> 3 Cu + Al₂O₃  

△ H

 = 1190 kJ/mol

If 5 moles of N₂ reacted with 12 moles of O₂ according to 0 N2 + 2 O₂ + NO₂ how many moles NO₂ are produced

What are the buffers used for biological and clinical measurements? State the properties of each buffer and the limitations to its applications.