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klio [65]
2 years ago
8

Hydrogen Cyanide, HCN, is a poisonous gas. The

Chemistry
1 answer:
Nikolay [14]2 years ago
5 0

mass of NaCN = 0.539 g

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2NaCN (s) + H₂SO₄ (aq) ⇒ Na₂S0₄ (aq) + 2HCN (g)

MW HCN = 27,0253 g/mol

MW NaCN = 49,0072 g/mol

Assume there is 1 kg air, and mass of HCN = 300 mg

mol HCN :

mass 300 mg = 0.3 g

\tt mol=\dfrac{0.3}{27.0253}=0.011

NaCN : HCN = 2 : 2(mole ratio from equation), so :

mol NaCN = mol HCN = 0.011

mass NaCN :

\tt mass=mol\times MW\\\\mass=0.011\times 49.0072=0.539~g

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1. The molar mass of the unknown gas obtained is 0.096 g/mol

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<h3>Graham's law of diffusion </h3>

This states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e

R ∝ 1/ √M

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<h3>1. How to determine the molar mass of the gas </h3>
  • Rate of unknown gas (R₁) = 11.1 mins
  • Rate of H₂ (R₂) = 2.42 mins
  • Molar mass of H₂ (M₂) = 2.02 g/mol
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Square both side

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Cross multiply

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<h3>2. How to determine the pressure of O₂</h3>

From the question given above, the following data were obtained:

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The pressure of the gas can be obtained by using the ideal gas equation as illustrated below:

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Divide both side by V

P = nRT / V

P = (27.65625 × 0.0821 × 294) / 438

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Learn more about Graham's law of diffusion:

brainly.com/question/14004529

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