Moles, compounds and formula |
Find the empirical formulae and name each of the following compounds.
1) A black powder is made of 63.2% Mn and 36.8%O. MnO2
2) A dark red powder has the composition Fe - 70%, O - 30%. Fe2O3
3) A colourless liquid, contains 52.2%C, 13.0%H and 34.8%O C2H6O
4) A white powder is Na 27.4%, H 1.2%, C 14.3% and O 57.1 %. NaHCO3
5) An oily liquid that can eat away paper contains 2.1%H, 65.4%O and 32.5%S H2SO4