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Mass of a reactant or product from a balanced equation

This type of question, asked 8 times: 25 Jun 2022, 29 Jul 2022, 13 Apr 2023, 24 Jan 2025, 4 Apr 2025, 21 Jan 2026 S2, 2 Apr 2026 S1, 5 Apr 2026 S1. All 8 questions below, oldest first.

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  1. Question 1

    25 Jun 2022

    60
    Number of grams of bromine that will completely react with 5.0 g5.0\text{ }g of pent-1-ene is xx 10−2 g10^{- 2}\text{ }g. (Atomic mass of Br=80 g/molBr = 80\text{ }g/mol ) [Nearest Integer)

  2. Question 2

    29 Jul 2022

    121
    Consider the reaction
    4HNO3(l)+3KCl(s)→Cl2( g)+NOCl(g)+4HNO_{3}(l) + 3KCl(s) \rightarrow Cl_{2}(\text{ }g) + NOCl(g) +
    2H2O(g)+3KNO3( s)2H_{2}O(g) + 3KNO_{3}(\text{ }s)
    The amount of HNO3HNO_{3} required to produce 110.0 g110.0\text{ }g of KNO3KNO_{3} is: (Given: Atomic masses of H,O,NH,O,N and KK are 1, 16,14 and 39, respectively.)

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  3. Question 3

    13 Apr 2023

    142
    1 g1\text{ }g of a carbonate (M2CO3)\left( M_{2}CO_{3} \right) on treatment with excess HClHCl produces 0.01 mol0.01\text{ }mol of CO2CO_{2} The molar mass of M2CO3M_{2}CO_{3} is____ g mol−1mol^{- 1}. (Nearest integer)

  4. Question 4

    24 Jan 2025

    48
    Xg of benzoic acid on reaction with aq. NaHCO3NaHCO_{3} release CO2CO_{2} that occupied 11.2 L volume at STP. X is ____\_\_\_\_ g .

  5. Question 5

    4 Apr 2025

    122
    The amount of calcium oxide produced on heating 150 kg limestone ( 75%75\% pure) is kg . (Nearest integer).Given : Molar mass (in gmol−1g{mol}^{- 1} ) of Ca−40,O−16,C−12Ca - 40,O - 16,C - 12

  6. Question 6

    21 Jan 2026 S2

    29
    Aqueous HCl reacts with MnO2(s)MnO_{2}(s) to form MnCl2(aq)MnCl_{2}(aq), Cl2(g)Cl_{2}(g) and H2O(l)H_{2}O(l). What is the weight (in g) of Cl2Cl_{2} liberated when 8.7 g of MnO2(s)MnO_{2}(s) is reacted with excess aqueous HCl solution ? (Given Molar mass in gmol−1Mn=55,Cl=35.5,O=16,H=1gmol^{- 1}Mn = 55,Cl = 35.5,O = 16,H = 1)

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  7. Question 7

    2 Apr 2026 S1

    26
    The mass of iron converted into Fe3O4Fe_{3}O_{4} by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1, 16 and 56 g mol−156\text{ }g{\text{ }mol}^{- 1} respectively) Assume iron is present in excess :

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  8. Question 8

    5 Apr 2026 S1

    26
    How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given : Molar mass of C,OC,O and Ag are 12, 16 and 108 g mol−1108\text{ }g{\text{ }mol}^{- 1} respectively)

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