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
Rufina [12.5K]
3 years ago
8

Under certain conditions Argon gas diffuses at a rate of 3.2 cm per second under the same conditions an unknown gas diffuses at

the at a rate of 4.5 cm per second what is the approximate molar mass of the unknown gas
Chemistry
1 answer:
kozerog [31]3 years ago
7 0

Answer:

20 g/mol

Explanation:

We can use <em>Graham’s Law of diffusion</em>:

The rate of diffusion (<em>r</em>) of a gas is inversely proportional to the square root of its molar mass (<em>M</em>).

r = \frac{1 }{\sqrt{M}}

If you have two gases, the ratio of their rates of diffusion is

\frac{r_{2}}{r_{1}} = \sqrt{\frac{M_{1}}{M_{2}}}

Squaring both sides, we get

(\frac{r_{2}}{r_{1}})^{2} = \frac{M_{1}}{M_{2}}

Solve for <em>M</em>₂:

M_{2} = M_{1} \times (\frac{r_{1}}{r_{2}})^{2}

M_{2} = \text{39.95 g/mol} \times (\frac{\text{3.2 cm/s}}{\text{4.5 cm/s}})^{2}= \text{39.95 g/mol} \times (0.711 )^{2}

= \text{39.95 g/mol} \times 0.506 = \textbf{20 g/mol}

You might be interested in
What is the effect on this???
Setler79 [48]
It being transmitted
7 0
3 years ago
Sammy and Marisa are asked to determine what kind of bonds are present in the
kotykmax [81]

Answer:

I think Sammy is right because I'm sure the compound contains ionic bonds

7 0
2 years ago
The specific heat of ethanol is 2.44 J/g ֯C. How many kJ of energy are required to heat 50.0 grams of ethanol from -20 ֯C to 68
Aliun [14]

Answer:

Heat energy required (Q) = 10.736 KJ

Explanation:

Given:

Specific heat of ethanol (C) = 2.44 J/g °C

Mass of ethanol (M) = 50 gram

Initial temperature (T1) = -20°C

Final temperature (T1) = 68°C

Find:

Heat energy required (Q) = ?

Computation:

Change in temperature (ΔT) = 68°C - (-20°C)

Change in temperature (ΔT) = 88°C

Heat energy required (Q) = mC(ΔT)

Heat energy required (Q) = (50)(2.44)(88)

Heat energy required (Q) = 10,736 J

Heat energy required (Q) = 10.736 KJ

5 0
3 years ago
The coolest stars in the sky are ____ in color
Mekhanik [1.2K]
Red is the answer in the blank
4 0
2 years ago
Read 2 more answers
What is Chemistry and how do you relate in real life?
Neko [114]
It is known that chemistry is a BIG part of our everyday lives. You can find chemistry in daily life in foods you eat, air you breathe, soap, your emotions and literally every object you can see or touch. For example, Chemistry explains how food changes as you cook it, how it rots, how to preserve food, how your body uses the food you eat, and how ingredients interact to make food.
Hope it helps! :)
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following correctly describes a compound? (4 points) a The atoms are bonded together, and the compound has differen
    11·1 answer
  • Help pls 100 points and brainiest
    9·2 answers
  • When two intermediate chemical equations are combined, the same substance that appears in the same phase can be canceled out, pr
    10·2 answers
  • The following questions pertain to a system contains 122 g CO(g) in a 0.400 L container at -71.2 degrees C.
    5·1 answer
  • Which of the following stages would come first in the life of a star? Neutron star White dwarf Protostar Black hole
    9·1 answer
  • Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of eleme
    10·1 answer
  • Which feature forms as a result of conduction between magma and water?
    6·2 answers
  • Verbal expressions, body language, and facial expressions are all __________ components of emotion.
    6·2 answers
  • Is that flirting? I'm not sure and I really need to know-
    13·1 answer
  • A material that is not a mixture; has the same properties all the way through
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!