Q.1.
Which of these compounds has the largest M ?
Q.2.
The M of aluminium nitrate, Al(NO ) is… (Ar: N - 14, O - 16, Al - 27)
Q.3.
Which of these reactions has an atom economy of 100%?
Q.4.
In the following reaction, if I fully react 400cm of methane, what volume of carbon dioxide should I expect to make? CH + 2 O → CO + 2 H O
Q.5.
I make a solution of sodium hydroxide, NaOH, which has a concentration of 0.2 mol/dm . What is its concentration in g/dm ? A : Na: 23; O: 16; H: 1
Q.6.
In the following reaction, if I fully react 4g of methane, what mass of water should I expect to make? CH + 2 O → CO + 2 H O
Q.7.
In a titration I use 25cm of 0.20 mol/dm sodium hydroxide solution and find that it is neutralised by exactly 21cm of hydrochloric acid. What is the concentration of the hydrochloric acid solution? HCl + NaOH → NaCl + H O
Q.8.
I make some ethyl ethanoate by reacting ethanol and ethanoic acid. Before carrying out the reaction I have calculated that I should be able to make 3.2g of my product. However, on weighing my purified product I find that I only have 1.8g. What is the percentage yield for my reaction?
Q.9.
I dissolve 10g of NaOH in 100 cm of water. Which row shows the correct concentration in both g/dm and mol/dm ?
Q.10.
I have 2 dm of carbon dioxide gas at room temperature and pressure. How many moles do I have?