Question 3

a. An aqueous solution contains 18% ethyl alcohol by volume. Express the composition in weight % and mole %. The densities of ethyl alcohol and water are 790 kg/m³ and 1000 kg/m³. (3 marks)

b.(i) A solution has a gravity of 100 °Tw. What is its specific gravity and °Bé? (ii) An oil has a specific gravity of 0.69. Find its °API and °Bé. (2 marks)