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m_a_m_a [10]
3 years ago
12

The change of state from solid to gas without an intermediate liquid state is called evaporation. true and false

Chemistry
1 answer:
-BARSIC- [3]3 years ago
8 0
It is false, evaporation is when water vapor heats and goes from a liquid to a gas. The change of state from solid directly to gas is called sublimation
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The effusion rate of hcl is 43. 2 cm/min in a certain effusion apparatus. What is the rate of effusion of ammonia in the same ap
olga2289 [7]

The rate of effusion of ammonia (NH₃) in the same apparatus is 63.3 cm/min

<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

R₁/R₂ = √(M₂/M₁)

<h3>How to determine the rate of ammonia (NH₃) </h3>
  • Rate of HCl (R₁) = 43.2 cm/min
  • Molar mass of HCl (M₁) = 1 + 35.5 = 36.5 g/mol
  • Molar mass of NH₃ (M₂) = 14 + (3×1) = 17 g/mol
  • Rate of NH₃ (R₂) =?

R₁/R₂ = √(M₂/M₁)

43.2 / R₂ = √(17 / 36.5)

Cross multiply

43.2 = R₂ × √(17 / 36.5)

Divide both side by √(17 / 36.5)

R₂ = 43.2 / √(17 / 36.5)

R₂ = 63.3 cm/min

Thus, the rate of effusion of ammonia is 63.3 cm/min

Learn more about Graham's law of diffusion:

brainly.com/question/14004529

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What kind of energy is stored in an electromagnet?
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Someone help please , I’ll give brain . Question 10 !
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What are some molecular compounds that we use in everyday life and their products?
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Answer:

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