A gas cylinder contains 12 x 10 24 molecules of oxygen gas. If Avogadro's number is 6 x 10 23 ; Calculate: (i) the mass of oxygen present in the cylinder. (ii) the volume of oxygen at S.T.P. present in the cylinder. [O=16]

Gram molecular mass of oxygen = 32 g = 1 mole and contains 6 x 10 23 molecules i.e., 6 x 10 23 molecules weigh 32 g 12 x 10 24 molecules will weigh = x 12 x 10 24 = 640 g (ii) 6 x 10 23 molecules occupy 22.4 lit. of vol. 12 x 10 24 molecules will occupy = x 12 x 10 24 = 448 lit. Hence, mass of O 2 present in the cylinder = 640 g and volume of O 2 at S.T.P. present in the cylinder = 448 lit.

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Chemistry

A gas cylinder contains 12 x 10²⁴ molecules of oxygen gas.
If Avogadro's number is 6 x 10²³; Calculate:
(i) the mass of oxygen present in the cylinder.
(ii) the volume of oxygen at S.T.P. present in the cylinder. [O=16]

Mole Concept

ICSE 2016

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Chemistry

A gas cylinder contains 12 x 10²⁴ molecules of oxygen gas.
If Avogadro's number is 6 x 10²³; Calculate:
(i) the mass of oxygen present in the cylinder.
(ii) the volume of oxygen at S.T.P. present in the cylinder. [O=16]

Mole Concept

ICSE 2016

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Write equations for the reactions taking place at the two electrodes during the electrolysis of:
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Name:
(i) the product formed at the anode – during electrolysis of acidified water using platinum electrodes.
(ii) the metallic ions that should be present – in the electrolyte when an article made of copper is to be electroplated with silver.

A gaseous hydrocarbon contains 82.76% of carbon. Given that it's vapours density is 29, find it's molecular formula.
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The equation :
4NH₃ + 5O₂ ⟶ 4NO + 6H₂O,
represents the catalytic oxidation of ammonia. If 100 cm³ of ammonia is used calculate the volume of oxygen required to oxidize the ammonia completely.

Chemistry

A gas cylinder contains 12 x 1024 molecules of oxygen gas.If Avogadro's number is 6 x 1023; Calculate:(i) the mass of oxygen present in the cylinder.(ii) the volume of oxygen at S.T.P. present in the cylinder. [O=16]

Mole Concept

ICSE 2016

Related Questions

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Name:(i) the product formed at the anode – during electrolysis of acidified water using platinum electrodes.(ii) the metallic ions that should be present – in the electrolyte when an article made of copper is to be electroplated with silver.

A gaseous hydrocarbon contains 82.76% of carbon. Given that it's vapours density is 29, find it's molecular formula.[C = 12, H = 1]

The equation :4NH3 + 5O2 ⟶ 4NO + 6H2O,represents the catalytic oxidation of ammonia. If 100 cm3 of ammonia is used calculate the volume of oxygen required to oxidize the ammonia completely.

A gas cylinder contains 12 x 10²⁴ molecules of oxygen gas.
If Avogadro's number is 6 x 10²³; Calculate:
(i) the mass of oxygen present in the cylinder.
(ii) the volume of oxygen at S.T.P. present in the cylinder. [O=16]

Write equations for the reactions taking place at the two electrodes during the electrolysis of:
(i) Acidified CuSO₄ solution with copper electrodes.
(ii) Molten PbBr₂ with inert electrodes. (mention clearly the name of the electrode in each case)

Name:
(i) the product formed at the anode – during electrolysis of acidified water using platinum electrodes.
(ii) the metallic ions that should be present – in the electrolyte when an article made of copper is to be electroplated with silver.

A gaseous hydrocarbon contains 82.76% of carbon. Given that it's vapours density is 29, find it's molecular formula.
[C = 12, H = 1]

The equation :
4NH₃ + 5O₂ ⟶ 4NO + 6H₂O,
represents the catalytic oxidation of ammonia. If 100 cm³ of ammonia is used calculate the volume of oxygen required to oxidize the ammonia completely.