2011The relative atomic mass of a naturally occurring lithium consisting of 90% Li and 10% Li isSee more
2011What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution? [Na = 23, O = 16, H = 1]See more
2011From the diagram above, find the amount of solute deposited when 200 cm3 of the solution is cooled from 55oC to 40oCSee more
2011An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contains isSee more
2011What type of bond exits between an element X with atomic number 12 and Y with atomic number 17?See more
2011How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?See more