A gas of unknown molecular weight is found to diffuse at a rate of 0.19cm/s compared to 0.59 cm/s for helium?

1. A gas of unknown molecular weight is found to diffuse at a rate of 0.19 cm/s compared to 0.59cm/s for helium gas. Calculate the molecular weight of the unknown gas.

2. Which of all of the possible gases should have the highest rate of diffusion?

Answer:
Graham's law : the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles.
Rate 1 / Rate 2 = square root M2 /M1
0.59 / 0.19 = square root M2 / 4.0026
3.10 = square root M2 / 4.0026
9.64 = M2 / 4.0026
M2 = 38.6 g/mol

2. H2 because it has the smallest molar mass

The answers post by the user, for information only, FunQA.com does not guarantee the right.



More Questions and Answers:
  • Which is stronger? Ethanoic acid or 'Tris' acid?
  • Doesn't the process of reducing haematite to iron contain a displacement reaction?
  • What will happen if the atmosphere is made up of mainly oxygen?
  • How to write a net ionoc equation?
  • Why does volume not considered as an S.I. base unit?
  • Why are three hydrogren atoms acidic in Citric Acid?
  • Can someone help me with this problem?
  • I can't decide 2 major in chemistry or chemical engineering. I want 2 work with pyrotechnics. What should I do
  • The fermentation of glucose to produce ethyl alcohol may be represented by the equation...?