1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
iren [92.7K]
2 years ago
8

If 5 mol of oxygen gas effuses through an opening in 10 seconds, how long will it take for the same amount of hydrogen gas to ef

fuse under the same conditions?
( a ) 1.6 s

( b ) 2.5 s

( c ) 40 s

( d ) 160 s
Chemistry
1 answer:
andrezito [222]2 years ago
6 0

Answer:

B

Explanation:

Recall the law of effusion:

\displaystyle \frac{r_1}{r_2} = \sqrt{ \frac{\mathcal{M}_2}{\mathcal{M}_1} }

Because 5 mol of oxygen was effused in 10 seconds, the rate is 0.5 mol/s.

Let the rate of oxygen be <em>r</em>₁ and the rate of hydrogen be <em>r</em>₂.

The molecular weight of oxygen gas is 32.00 g/mol and the molecular weight of hydrogen gas is 2.02 g/mol.

Substitute and solve for <em>r</em>₂:

\displaystyle \begin{aligned} \frac{(0.5\text{ mol/s})}{r_2} & = \sqrt{\frac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}} \\ \\  r_2 & = \frac{0.5\text{ mol/s}}{\sqrt{\dfrac{(2.02\text{ g/mol})}{(32.00\text{ g/mol})}}} \\ \\ & = 2.0\text{ mol/s}\end{aligned}

Because there are 5 moles of hydrogen gas:

\displaystyle 5.0\text{ mol} \cdot \frac{1\text{ s}}{2.0\text{ mol}} = 2.5\text{ s}

In conclusion, it will take about 2.5 seconds for the hydrogen gas to effuse.

Check: Because hydrogen gas is lighter than oxygen gas, we expect that hydrogen gas will effuse quicker than oxygen gas.

You might be interested in
When ash, cinders, and bombs build up in a steep pile around a volcano’s vent, the result is a
Verdich [7]
Im pretty sure a cinder-cone volcano 
8 0
3 years ago
What is the abbreviation for the element with atomic number 11?
VikaD [51]

Answer:

Sodium (Na) has atomic number 11.

5 0
3 years ago
Read 2 more answers
Hi! I need help with this question, if it is possible, please answer immediately.
Dennis_Churaev [7]

Answer:

A.

Explanation:

The paper clip allows elictricity to pass, unlike the eraser or paper

6 0
3 years ago
What will happen to the litmus strips?
Nitella [24]
If the solution is BASIC than it will turn purple but if ACIDIC it will turn pink. 
8 0
3 years ago
Write a caption for a photo of a polluted city.​
arlik [135]

Answer:

ok

Explanation:

this is a picture of a city that we have made worse everyday

5 0
3 years ago
Other questions:
  • Helium balloons stay the same size as you hold them, but swell and burst as they rise to high altitudes when you let them go. Wh
    9·1 answer
  • I need help! what is the chemical makeup of hydrogen peroxide!! answer is worth 20 points. ¢¢
    9·1 answer
  • A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The s
    9·1 answer
  • How many lead atoms are in a cube of lead that has a volume of 2.18 cm3 if the density of lead is 11.3 g/cm3?
    14·1 answer
  • Will mark as Brainliest.
    11·1 answer
  • When a chemical reaction reaches chemical equilibrium which occurs faster, the formation of product from reactants or reactants
    5·1 answer
  • What is the difference between a strong base and a weak base?
    6·1 answer
  • How I can answer this plz
    13·2 answers
  • Red blood cells are constantly being produced in your body. Another body system cooperates with the cardiovascular system in the
    12·1 answer
  • Compare the movement and arrangement of the molecules in solid nitrogen to those in nitrogen gas.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!