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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) 

The concentration of compound X is measured at different time intervals during the course of a chemical reaction. After plotting a graph of the concentration of X against time, shown below, the points labelled A-E on the graph have the following co-ordinates: A: x = 0 seconds; y = 0 mol L-1 B: x = 110 seconds; y = 71 mol L-1 C: x = 225 seconds; y = 92 mol L-1 D: x = 330 seconds; y = 126 mol L-1 E: x = 450 seconds; y = 120 mol L-1     What is the rate of the chemical reaction at point C?       

Which one of the following statements regarding a dynamic equilibrium is false?   

Which one of the following statements regarding glucose metabolism is true?

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 41: How many moles of sodium hydroxide were neutralised? Give your answer to 4 d.p.

A hydrophobic compound will usually dissolve into an aqueous solvent. True or false? 

What is the net production of ATP molecules from the complete oxidation of one glucose molecule, assuming 100% efficiency?

Two atomic orbitals will overlap to form how many molecular orbitals?  

What is the pH of a 0.65 M solution of formic acid (Ka = 1.77 x 10-4)? Give your answer to 2 d.p.

Which one of the following is a non-polar bond?