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
Gre4nikov [31]
3 years ago
5

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

Chemistry
1 answer:
Katarina [22]3 years ago
8 0
 <span>0.38 

You first calculate the total moles by dividing the grams by molecular weight: 
45 g N2 / 28.02 g/mol = 1.6 mol N2 
40 g Ar / 39.95 g/mol = 1.0 mol 

Then you divide the moles of Ar by the total number of moles: 
1.0 / (1.6 + 1.0) = 0.38 mol fraction</span>
You might be interested in
The atom shown below is?
Volgvan

Answer:

Explanation:

Not likely to form any bonds because in it's last she'll it has 8 electrons and is therefore stable

8 0
3 years ago
Transpiration is the process by which ____.<br>​
saul85 [17]

Answer:

Plants add water to the atmosphere

Explanation:

3 0
3 years ago
Read 2 more answers
An element is?
Sidana [21]

i think it’s D , not sure though

4 0
3 years ago
Read 2 more answers
What is an internal cost of driving a domestic car?
Nataly_w [17]

Answer:

The correct option is: Cost of materials used in manufacture

Explanation:

There are two types of costs of an object: the internal costs and the external costs.

The internal cost of an object is the direct monetized cost. It refers to the cost involved in the <u>production or manufacturing of a given objec</u>t. Example: labor, <u>material required</u>, equipment, energy, and overhead expenses.

3 0
3 years ago
A 250. ml sample of 0.0328m hcl is partially neutralized by the addition of 100. ml of 0.0245m naoh. find the concentration of h
Ksenya-84 [330]

Answer: 0.0164 molar concentration of hydrochloric acid in the resulting solution.

Explanation:

1) Molarity of 0.250 L HCl solution : 0.0328 M

Molarity=\frac{\text{Number of moles}}{\text{Volume of solution in liters}}=0.0328=\frac{\text{Number of moles}}{0.250 L}

Moles of HCl in 0.250 L solution = 0.0082 moles

2) Molarity of 0.100 L NaOH solution : 0.0245 M

Molarity=\frac{\text{Number of moles}}{\text{Volume of solution in liters}}=0.0245=\frac{\text{Number of moles}}{0.100 L}

Moles of NaOH in 0.100 L solution = 0.00245 moles

3) Concentration of hydrochloric acid in the resulting solution.

0.00245 moles of NaOH will neutralize 0.00245 moles of HCl out of 0.0082 moles of HCl.

Now the new volume of the solution = 0.100 L +0.250 L = 0.350 L

Moles of HCl left un-neutralized = 0.0082 moles - 0.00245 moles =  0.00575 moles

Molarity=\frac{\text{number of moles}}{\text{volume of solution in L}}

Molarity of HCl left un-neutralized :\frac{0.00575 moles}{0.350L}=0.0164 M

0.0164 molar concentration of hydrochloric acid in the resulting solution.

3 0
3 years ago
Other questions:
  • A 211 g sample of barium carbonate, baco3, reacts with a solution of nitric acid to give barium nitrate, carbon dioxide, and wat
    11·1 answer
  • Use the words protons neutrons and I suppose in the same sentence ​
    5·1 answer
  • the term diffusion comes from a latin word meaning to spread apart. how is the term diffusion related to its latin word of origi
    14·2 answers
  • Consider this equilibrium: COCl2(g) CO(g) + Cl2(g) Keq = 8.1 x 10-4. What is true for this system? [COCl2] &lt; [CO][Cl2] [COCl2
    6·2 answers
  • Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt
    7·1 answer
  • What is normal body temperature in kelvins? Express your answer in kelvins using four significant figures.
    5·1 answer
  • A compound is 70.0% iron and 30.0% oxygen. Its molecular mass is 479.1 g/mol. Determine the
    9·1 answer
  • Which reason best explains why plasmas are good conductors of electricity? They have mobile charged particles. They are at extre
    7·2 answers
  • Answer truthfully:))​
    12·1 answer
  • Why wasn’t sodium hydroxide used in the synthesis of divanillyl oxalate, instead of triethylamine?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!