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CLASS 4, LIMITING REACTANT, , Limiting reactant can be defined as the reactant which is completely consumed during a, reaction., , Problems, , 1. 50 kg of N2 and 10 kg of H2 are mixed to produce NH3. Identify the limiting reactant, and calculate amount of NH3 produced., , 2. Dinitrogen and dihydrogen react with each other to produce NH3 according to the, following equation., , N2+3H2 ~2.NH3, , i. Calculate mass of NH3 produced if 2 kg dinitrogen reacts with 1 kg, dihydrogen., , ii. Will any of the 2 reactants remain unaffected?, iii. If yes, which one and what would be its mass?, 3. In areaction,, A+B2=AB2, i. 300 atoms of A + 200 molecules of B, ii. 2 moles of A+ 3 moles of B, iii. 100 atoms of A+ 100 molecules of B, iv. 5 moles of A+ 2.5 moles of B, v. 2.5 moles of A+ 5 moles of B, PREVIOUS QUESTIONS, 2010 SAY, , 1. One mole is the amount of the substance that contains as many elementary particles, as 12 g of C-12 isotope of carbon., , a. What do you mean by molar mass of a compound?, , b. Calculate number of moles in 1 litre of water (Density of water is 1 g/ml). Also, calculate the number of water molecules in 1 litre of water., , 2012 MARCH, 2. a. What is meant by limiting reactant in a chemical reaction?, c. 28g of nitrogen is mixed with 12 g of hydrogen to form NH3 as per the reaction,, No + 3H2— 2NHs., , Which the limiting reactant in this reaction?, , Edit with WPS Office

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(Atomic masses: N-14 H-1), 2012 SAY, , 3. Mole is a very large number to indicate the number of atoms, molecules etc. Write, another name for one mole., , 2013 MARCH, , 4. The mole concept helps in handling a large number of atoms and molecules in, stoichiometric calculations., , a. Define 1 mole., b. What is the number of H atoms in 1 mole of methane (CHa)?, 2013 SAY, , 5. a. Atoms have very small mass and so usually the masses of atoms are given, relative to standard called Atomic Mass Unit. Define 1 AMU., , c. Inareaction A + B2- AB2, identify the limiting reactant in the reaction mixture, containing 5 mol A and 2.5 mol B., , 2014 MARCH, , 6. How many moles of dioxygen are present in 64 g of dioxygen? ( Molecular mass of, dioxygen is 32 )., , 2015 MARCH, 7. Calculate the number of molecules in each of the following:, bk 1gNo, ii. 1gCO2z, (Given that Na is 6.022 X 10 *°. Molecular mass of No is 28 and C02 is 44), 2015 SAY, 8. 12g of C-12 contains Avogadro’s number of carbon atoms., i. Give the Avogadro’s number., ii. The mass of 2 moles of ammonia gas is ............., 2017 SAY, 9. Calculate the mass of a magnesium atom in gram., 2018 MARCH, , 10. The number of oxygen atoms present in 5 moles of glucose (Cs6H1206) is, , , , Edit with WPS Office