Chemistry
MnO2 + 4HCl ⟶ MnCl2 + 2H2O + Cl2
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate:
(a) mass of MnO2 used
(b) moles of salt formed,
(c) mass of salt formed,
(d) moles of chlorine gas formed,
(e) mass of chlorine gas formed,
(f) volume of chlorine gas formed at S.T.P.,
(g) moles of acid required,
(h) Mass of acid required.
Related Questions
(a) Calculate the mass of ammonia that can be obtained from 21.4 g of NH4Cl by the reaction:
2NH4Cl + Ca(OH)2 ⟶ CaCl2 +2H2O + 2NH3
(b) What will be the volume of ammonia when measured at S.T.P?
Aluminium carbide reacts with water according to the following equation.
Al4C3 + 12H2O ⟶ 3CH4 + 4Al(OH)3
(a) What mass of aluminium hydroxide is formed from 12g of aluminium carbide?
(b) What volume of methane is obtained from 12g of aluminium carbide?
Nitrogen and hydrogen react to form ammonia.
N2 (g) + 3H2 (g) ⟶ 2NH3 (g)
If 1000 g of H2 react with 2000 g of N2:
(a) Will any of the two reactants remain unreacted? If yes, which one and what will be it's mass?
(b) Calculate the mass of ammonia (NH3) that will be formed?
Which of the following weighs the least?
(a) 2 g atom of N
(b) 3 x 1025 atoms of carbon
(c) 1 mole of sulphur
(d) 7 g of silver