Find the:
(a) number of moles in 10 g of CaCO₃,
(b) weight of 0.2 mole of H₂ gas,
(c) number of molecules in 3.2 g of SO₂.

Question

Find the: (a) number of moles in 10 g of CaCO3, (b) weight of 0.2 mole of H2 gas, (c) number of molecules in 3.2 g of SO2.

KnowledgeBoat · Accepted Answer

(a) 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 (b) Weight of 0.2 mole H2 gas 1 mole of H2 weighs = 2 g 0.2 moles will weigh = = 0.4 g (c) 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 moles in 10 g of CaCO₃,
(b) weight of 0.2 mole of H₂ gas,
(c) number of molecules in 3.2 g of SO₂.

Mole Concept

Related Questions

(i) If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 CC of gas B?
The gases A and B are under the same conditions of temperature and pressure.
(ii) Name the law on which the above problem is based.

Calculate the relative molecular masses of :
(a) Ammonium chloroplatinate [(NH₄)₂PtCl₆]
(b) Potassium chlorate [KClO₃]
(c) CuSO₄.5H₂O
(d) (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 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 moles in 10 g of CaCO3,(b) weight of 0.2 mole of H2 gas,(c) number of molecules in 3.2 g of SO2.

Mole Concept

Related Questions

(i) If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 CC of gas B?The gases A and B are under the same conditions of temperature and pressure.(ii) Name the law on which the above problem is based.

Calculate the relative molecular masses of :(a) Ammonium chloroplatinate [(NH4)2PtCl6](b) Potassium chlorate [KClO3](c) CuSO4.5H2O(d) (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 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 moles in 10 g of CaCO₃,
(b) weight of 0.2 mole of H₂ gas,
(c) number of molecules in 3.2 g of SO₂.

(i) If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 CC of gas B?
The gases A and B are under the same conditions of temperature and pressure.
(ii) Name the law on which the above problem is based.

Calculate the relative molecular masses of :
(a) Ammonium chloroplatinate [(NH₄)₂PtCl₆]
(b) Potassium chlorate [KClO₃]
(c) CuSO₄.5H₂O
(d) (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 maximum number of molecules?
(a) 4 g of O₂
(b) 4 g of NH₃
(c) 4 g of CO₂
(d) 4 g of SO₂