Henry’s Law states that:

What mass (in grams) of NaOH do we need to prepare 250 mL of a 4 M solution? (Molar mass of NaOH = 40 g/mol) 

Consider the equilibrium reaction H2 + I2 ⇌ 2HI. The equilibrium constant for this reaction is represented by which one of the following?  

Questions 41 – 43 relate to the following problem: A solution of sodium hydroxide contained 0.95 mol dm-3. Using phenolphthalein indicator, titration of 50.0 cm3 of this solution required 27.0 cm3 of a hydrochloric acid solution for complete neutralisation.                                       Question 42: How many moles of hydrochloric acid were neutralised? Give your answer to 4 d.p.

Are these molecules geometric isomers of each other, Yes or No?   

Consider the equilibrium reaction N2 + 3H2 ⇌ 2NH3 Determine the equilibrium constant for this reaction if = 0.175 mol/L; = 0.75 mol/L; = 0.55 mol/L Give your answer to 4 s.f.

Which one of the following nitrogenous bases is not found in RNA?

Which one of the following species behave as an electrophile? 

Magnetic sector mass spectrometry separates molecules according to their mass to charge ratio. Using the mass spectra plot below, identify all 3 fragment peaks A ; B ; and C .

What is the pH of an HCl solution at a concentration of 4.68 x 10–4 mol L–1? Give your answer to 2 d.p.