(iii) 2 moles of carbon are burnt in 16 g of O2. Hence, X is limiting agent. Q30. The remaining 18g of carbon (1.5 mol) will not undergo combustion. NCERT Chemistry Book for Class 11 and Class 12 are published by the officials of NCERT (National Council Of Educational Research and Training), New Delhi. Identify the limiting reagent, if any, in the following reaction mixtures. of decimal place in each term is 4, the no. Write bond-line formulas for: Isopropyl alcohol, 2,3-Dimethylbutanal, Heptan-4-one. Q27. As per definition, pressure is force per unit area of the surface. How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different? Q23. Hence, 0.5 mol of Na2CO3Na_{ 2 }CO_{ 3 }Na2​CO3​ is in 1 L of water or 53 g of Na2CO3Na_{ 2 }CO_{ 3 }Na2​CO3​ is in 1 L of water. Therefore, H2H_{ 2 }H2​ will not react. Some Basic Concepts Of Chemistry – Solutions. (1) If we fix the mass of N2 at 28 g, the masses of N2 that will combine with the fixed mass of N2 are 32 grams, 64 grams, 32 grams and 80 grams. 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