Chapter 1 Some Basic Concepts of Chemistry Class 11 Chemistry NCERT Solutions

Question 4 part 1 : Calculate the amount of carbon dioxide that could be produced when 1 mole of carbon is burnt in air.

Question 1: Calculate the molecular mass of the following: (i) H2O (ii) CO2 (iii) CH4

Question 3: Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.

Question 2:  Calculate the mass percent of different elements present in sodium sulphate (Na₂SO₄)

Question 4 part 2: Calculate the amount of carbon dioxide that could be produced when 1 mole of carbon is burnt in 16 g of dioxygen.

Question 4 part 3: Calculate the amount of carbon dioxide that could be produced when 2 moles of carbon are burnt in 16 g of dioxygen.

Question 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 82.0245 g mol-1

Question 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 being 69%.

Question 7: How much copper can be obtained from 100 g of copper sulphate (CuSO4)?

Question 8: Question 8: Determine the molecular formula of an oxide of iron in which the mass per cent of iron and oxygen are 69.9 and 30.1 respectively. Given that the molar mass of the oxide is 159.69 g mol-1.

Question 9: Calculate the atomic mass (average) of chlorine using the following data:

Question 10: In three moles of ethane (C2H6), calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.