Chemistry
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.
Related Questions
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.
Complete the following blanks in the equation as indicated.
CaH2 (s) + 2H2O (aq) ⟶ Ca(OH)2 (s) + 2H2 (g)
(a) Moles: 1 mole + …………… ⟶ …………… + ……………
(b) Grams: 42g + …………… ⟶ …………… + ……………
(c) Molecules: 6.02 x 1023 + …………… ⟶ …………… + ……………
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.
The reaction between red lead and hydrochloric acid is given below:
Pb3O4 + 8HCl ⟶ 3PbCl2 + 4H2O + Cl2
Calculate
(a) the mass of lead chloride formed by the action of 6.85 g of red lead,
(b) the mass of the chlorine and
(c) the volume of chlorine evolved at S.T.P.