Q.7:- How much copper can be obtained from 100 g of copper sulphate (CuSO4 )? Answer:- 1 mole of CuSO4 contains 1 mole of copper. Molar mass of CuSO4 = (63.5)…

Q.7:- How much copper can be obtained from 100 g of copper sulphate (CuSO4 )? Answer:- 1 mole of CuSO4 contains 1 mole of copper. Molar mass of CuSO4 = (63.5)…

Q.6:- Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g mL-1 and the mass per cent of nitric acid in it…

Q.5:- Calculate the mass of sodium acetate (CH3COONa) required to make 500 mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245g mol-1. Answer:- 0.375 M…

Q.4:- Calculate the amount of carbon dioxide that could be produced when (i) 1 mole of carbon is burnt in air. (ii) 1 mole of carbon is burnt in 16 g…

Q.3:- Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass. Answer:- % of iron by mass = 69.9 % [Given]…

Q.2 :- Calculate the mass percent of different elements present in Sodium Sulphate (Na2SO4). Answer:- Molar mass of Na2SO4 = [(2 × 23.0) + (32.00) + 4 (16.00)] = 142 g…

Q.1 :- Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Answer:- (i) H2O = (2×Atomic mass of H) + (1×Atomic mass of O) = [2(1.0084) +…