NTA Abhyas JEE Main2020ChemistrySome Basic Concepts of ChemistryPractice

The total number of moles of neutrons present in 108 mL H 2 O l are

Correct answer

Step-by-step solution

∴ density of H 2 O ( l ) = 1 g / m L 1 m L contains = 1 g H 2 O 108 m L contains = 108 g H 2 O Number of moles of H 2 O l = 1 0 8 1 8 = 6 H has no neutron, Number of neutrons in O = 1 6 - 8 = 8 Number of moles of neutrons in 1 mole of H 2 O = 0 + 8 = 8 Number of moles of neutrons in 6 mole of H 2 O = 6 × 8 = 4 8

Practice Some Basic Concepts of Chemistry on Quantrex Academy →

More from Some Basic Concepts of Chemistry

Match List-I with List-II. List-I Mass of substance List-II Number of atoms A. 1.8 mg water I. 2 10⁻⁴ N_A B. 9.8 mg sulphuric acid II. 1.5 10⁻⁴ N_A C. 1.8 mg carbon III. 3 10⁻⁴ N_A 2026 Which of the following contain the same number of atoms ? (Given : Molar mass in g mol ⁻¹ of H, He, O and S are 1, 4, 16 and 32 respectively) A. 2 g of O₂ gas B. 4 g of SO₂ gas C. 2026 An oxide of iron contains 69.9 % iron, its empirical formula, is: (Given: Molar mass of Fe and O are 56 and 16 g mol ⁻¹ respectively.) 2026 What volume of hydrogen gas at STP would be liberated by action of 50 mL of H₂SO₄ of 50 % purity (density = 1.3 g mL ⁻¹ ) on 20 g of zinc ? Given : Molar mass of H, O, S, Zn are 1, 2026 How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given: Molar mass of C, O and Ag are 12 , 16 and 108 g mol ⁻¹ respectively) 2026 The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at STP is: 2026 Number of moles and number of molecules in 1.4187 L of SO₂ at STP respectively are: 2026 The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1 . It has two carbon atoms. The weight (in g) of CO₂(g) formed when 3.38 g of this hydrocarbon is completely b 2026 Full Some Basic Concepts of Chemistry list All NTA Abhyas JEE Main PYQs