Calculate the empirical formula of a compound containing 77.7% Iron and 22.3% of oxygen.
An empirical formula is the simplest whole number ratio of atoms of each element present in the compound.1) Divide by atomic relative mass to find the number of moles. 2) Find a ratio between the moles. 3) Divide the ratios by smallest number. 4) Obtain the number of atoms.1:1 ratio, therefore FeO.
JS
Related Chemistry A Level answers
All answers ▸Calculate the pH change when water is added to 25.0 ml of 0.250M NaOH to form a 1.00l solution.
Explain the trend of first ionisation energy down a group.
Explain why the enthalpy of lattice dissociation of potassium oxide is less endothermic than that of sodium oxide.
Giving the electronic configurations for each element, predict the trend in 1st ionisation energies going across period 2 from Lithium to Neon.