Find the:
(a) number of molecules in 73 g of HCl,
(b) weight of 0.5 mole of O₂,
(c) number of molecules in 1.8 g of H₂O,
(d) number of moles in 10 g of CaCO₃,
(e) weight of 0.2 mole of H₂ gas,
(f) number of molecules in 3.2 g of SO₂.

Question

Find the:
(a) number of molecules in 73 g of HCl,
(b) weight of 0.5 mole of O₂,
(c) number of molecules in 1.8 g of H₂O,
(d) number of moles in 10 g of CaCO₃,
(e) weight of 0.2 mole of H₂ gas,
(f) number of molecules in 3.2 g of SO₂.

KnowledgeBoat · Accepted Answer

(a) Number of molecules in 73 g of HCl Molecular wt. of any substance contain 6.022 × 10²³ molecules. Mass of 1 mole of HCl is 1 + 35.5 = 36.5 g 36.5 g of HCl contains 6.022 × 10²³ molecules 73 g of HCl contains = 1.2 × 10²⁴ molecules (b) Weight of 0.5 mole of O₂ 1 mole of O₂ weighs = 2O = 2 x 16 = 32 g 0.5 moles will weigh = = 16 g (c) Number of molecules in 1.8 g of H₂O Molecular wt. of any substance contains 6.022 × 10²³ molecules. Mass of 1 mole of H₂O is (2 x 1) + 16 = 2 + 16 = 18 g 18 g of H₂O contains 6.022 × 10²³ molecules 1.8 g of H₂O contains = 6.02 × 10²² molecules (d) Number of moles in 10 g of CaCO₃ Mass of 1 mole of CaCO₃ = 40 + 12 + 3(16) = 52 + 48 = 100 g 100 g of CaCO₃ = 1 mole 10 g of CaCO₃ = = 0.1 mole (e) Weight of 0.2 mole H₂ gas 1 mole of H₂ weighs = 2 g 0.2 moles will weigh = = 0.4 g (f) No. of molecules in 3.2 g of SO₂ Molecular wt. of any substance contain 6 × 10²³ molecules. Mass of 1 mole of SO₂ is 32 + 2(16) = 32 + 32 = 64 g 64 g of SO₂ contains 6 × 10²³ molecules 3.2 g of SO₂ contains = 3 x 10²² molecules.

Chemistry

Find the:
(a) number of molecules in 73 g of HCl,
(b) weight of 0.5 mole of O₂,
(c) number of molecules in 1.8 g of H₂O,
(d) number of moles in 10 g of CaCO₃,
(e) weight of 0.2 mole of H₂ gas,
(f) number of molecules in 3.2 g of SO₂.

Mole Concept

Related Questions

(a) What are the main applications of Avogadro's Law?
(b) How does Avogadro's Law explain Gay-Lussac's Law of combining volumes?

Calculate the relative molecular masses of :
(a) Ammonium chloroplatinate [(NH₄)₂PtCl₆]
(b) Potassium chlorate [KClO₃]
(c) CuSO₄.5H₂O
(d) (NH₄)₂SO₄
(e) CH₃COONa
(f) CHCl₃
(g) (NH₄)₂Cr₂O₇

Which of the following would weigh most?
(a) 1 mole of H₂O
(b) 1 mole of CO₂
(c) 1 mole of NH₃
(d) 1 mole of CO

Which of the following contains the maximum number of molecules?
(a) 4 g of O₂
(b) 4 g of NH₃
(c) 4 g of CO₂
(d) 4 g of SO₂

Chemistry

Find the:(a) number of molecules in 73 g of HCl,(b) weight of 0.5 mole of O2,(c) number of molecules in 1.8 g of H2O,(d) number of moles in 10 g of CaCO3,(e) weight of 0.2 mole of H2 gas,(f) number of molecules in 3.2 g of SO2.

Mole Concept

Related Questions

(a) What are the main applications of Avogadro's Law?(b) How does Avogadro's Law explain Gay-Lussac's Law of combining volumes?

Calculate the relative molecular masses of :(a) Ammonium chloroplatinate [(NH4)2PtCl6](b) Potassium chlorate [KClO3](c) CuSO4.5H2O(d) (NH4)2SO4(e) CH3COONa(f) CHCl3(g) (NH4)2Cr2O7

Which of the following would weigh most?(a) 1 mole of H2O(b) 1 mole of CO2(c) 1 mole of NH3(d) 1 mole of CO

Which of the following contains the maximum number of molecules?(a) 4 g of O2(b) 4 g of NH3(c) 4 g of CO2(d) 4 g of SO2

Find the:
(a) number of molecules in 73 g of HCl,
(b) weight of 0.5 mole of O₂,
(c) number of molecules in 1.8 g of H₂O,
(d) number of moles in 10 g of CaCO₃,
(e) weight of 0.2 mole of H₂ gas,
(f) number of molecules in 3.2 g of SO₂.

(a) What are the main applications of Avogadro's Law?
(b) How does Avogadro's Law explain Gay-Lussac's Law of combining volumes?

Calculate the relative molecular masses of :
(a) Ammonium chloroplatinate [(NH₄)₂PtCl₆]
(b) Potassium chlorate [KClO₃]
(c) CuSO₄.5H₂O
(d) (NH₄)₂SO₄
(e) CH₃COONa
(f) CHCl₃
(g) (NH₄)₂Cr₂O₇

Which of the following would weigh most?
(a) 1 mole of H₂O
(b) 1 mole of CO₂
(c) 1 mole of NH₃
(d) 1 mole of CO

Which of the following contains the maximum number of molecules?
(a) 4 g of O₂
(b) 4 g of NH₃
(c) 4 g of CO₂
(d) 4 g of SO₂