Chemistry
A compound has O = 61.32%, S = 11.15%, H = 4.88% and Zn = 22.65%.The relative molecular mass of the compound is 287 a.m.u. Find the molecular formula of the compound, assuming that all the hydrogen is present as water of crystallisation.
Related Questions
10.47 g of a compound contains 6.25 g of metal A and rest non-metal B. Calculate the empirical formula of the compound (At. wt of A = 207, B = 35.5)
A hydride of nitrogen contains 87.5% percent by mass of nitrogen. Determine the empirical formula of this compound.
The reaction between 15 g of marble and nitric acid is given by the following equation:
CaCO3 + 2HNO3 ⟶ Ca(NO3)2+ H2O + CO2
Calculate:
(a) the mass of anhydrous calcium nitrate formed
(b) the volume of carbon dioxide evolved at S.T.P.
66g of ammonium sulphate is produced by the action of ammonia on sulphuric acid.
Write a balanced equation and calculate:
(a) Mass of ammonia required.
(b) The volume of the gas used at S.T.P.
(c) The mass of acid required.