NCERT solution for class 9th // Science // Chapter 3 - Atoms and molecules
NCERT solutions > class 9 > Science NCERT solution for class 9th // Science // Chapter 3 - Atoms and molecules Page number 32. Q1 . In a reaction 5.3 g of sodium carbonate reacted with 6 gram of ethanoic acid the products were 2.2 gram of carbon dioxide 0.9 gram of water and 8.2 gram of sodium ethanoate show that these observations are in agreement with the law of conservation of mass sodium carbonate + ethanoic acid ----- sodium ethanoate + carbon dioxide + water Ans- . Sodium carbonate + Ethanoic acid_____ Sodium Ethanoate + Carbon dioxide + water 5.3 g. +. 6g ____ 8.2 + 2.2 g + 0.9 g 11.3g. ___ 11.3 g This shows that during the chemical reaction The mass of reactant = The mass of product Q2. Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water what mass of Oxygen gas would be required to react completely with 3 gram of ...