Chemistry
Sulphur burns in oxygen to give sulphur dioxide. If 16 g. of sulphur burns in 'x' cc. of oxygen, calculate the amount of potassium nitrate which must be heated to produce 'x' cc. of oxygen. [S = 32, K = 39, N = 14, O = 16].
Related Questions
Calculate the weight of ammonia gas.
(a) Required for reacting with sulphuric acid to give 78 g. of fertilizer ammonium sulphate.
(b) Obtained when 32.6 g. of ammonium chloride reacts with calcium hydroxide during the laboratory preparation of ammonia.
[2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3]
[N = 14, H = 1, O = 16, S = 32, Cl = 35.5].
Sodium carbonate reacts with dil. H2SO4 to give the respective salt, water and carbon dioxide. Calculate the mass of pure salt formed when 300 g. of Na2CO3 of 80% purity reacts with dil. H2SO4. [Na = 23, C = 12, O = 16, H = 1, S = 32].
Sample of impure magnesium is reacted with dilute sulphuric acid to give the respective salt and hydrogen. If 1 g. of the impure sample gave 298.6 cc. of hydrogen at s.t.p. Calculate the % purity of the sample. [Mg = 24, H = 1].
67.2 litres of H2 combines with 44.8 litres of N2 to form NH3 :
N2(g) + 3H2(g) ⟶ 2NH3(g).
Calculate the vol. of NH3 produced. What is the substance, if any, that remains in the resultant mixture ?