« previous next »

Author Question: Which of the following formula(s) best represent(s) Graham's law? I. II. III. IV. a. 1 ... (Read 89 times)

lindiwe

  • Hero Member
  • *****
  • Posts: 577
on: Jul 16, 2018
Which of the following formula(s) best represent(s) Graham's law?
 
  I.
  II.
  III.
  IV.
 
  a. 1 c. 2 and 4
  b. 3 d. 3 and 4

Question 2

Which gas has the lowest specific gravity at 25 C and 760 mm Hg?
 
  a. Water vapor c. CO2
  b. Helium d. O2


Toya9913

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: C
Graham's law states that when two gases are placed under the same temperature and pressure conditions, the rates of diffusion of the two gases are inversely proportional to the square root of their masses, or , where r1 and r2 represent the diffusion rates of the respective gases, and M1 and M2 are the molar masses. If the mass of a gas is considered directly proportional to its density at a constant temperature and pressure, then 2, where d1 and d2 are the densities of the gases in ques-tion.

Answer to Question 2

ANS: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

The fossil record of chimpanzees is sparse. The femur from Kikongo, Uganda (c) may represent a late The fossil record of chimpanzees is sparse. The femur from Kikongo, Uganda (c) may represent a late
Memory saver. The part numbers represent components from Radio Shack®. Memory saver. The part numbers represent components from Radio Shack®.
Easy way to remember to formula to calculate volume of a cylinder Easy way to remember to formula to calculate volume of a cylinder
Single-serve cups of infant formula Single-serve cups of infant formula
Single-serve pods of infant formula Single-serve pods of infant formula
Half-life Formula Half-life Formula
Video: Heart Chambers

For a complete list of videos, visit our video library