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
ivann1987 [24]
3 years ago
13

Calculate the number of molecules in 7 moles of oxygen

Chemistry
1 answer:
Alexxandr [17]3 years ago
3 0

Answer:

4.21

Explanation:

use Avogadro's number

6.023 x 10^23

multiply this by 7 because you want to find 7 moles :

6.023 x 10^23 x 7 = 4.21

You might be interested in
What volume of 0.555M KNO3 solution would contain 12.5 g of solute
Lorico [155]

The volume of 0.555M KNO3 solution would contain 12.5 g of solute iss 223 mL.

<h3>What is the relationship between mass of solute and concentration of solution?</h3>

The mass of solute in a given volume of solution is related by the formula below:

  • Molarity = mass/(molar mass * volume)

Therefore, volume of solution is given by:

Volume = Mass /molarity * molar mass

Molar mass of KNO₃ = 101 g/mol

Volume = 12.5/(0.555 * 101)

Volume = 0.223 L or 223 mL

In conclusion, the volume of the solution is obtained from the molarity of solution as well as mass and molar mass of solute.

Learn more about molarity and volume at: brainly.com/question/26873446
#SPJ1

3 0
2 years ago
Which of the following statement is not true?
konstantin123 [22]
I believe C is the answer <span />
4 0
3 years ago
Which of the following are effective treatments for some musculoskeletal conditions? Select all that apply. PLEASE ANSWER
Dimas [21]

Answer:

1,3, 4

Explanation:

6 0
4 years ago
A 10.0 cm3 sample of copper has a mass of 89.6 g. What is the density of copper
natali 33 [55]

Answer:

<h2>Density = 8.96 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass of copper = 89.6 g

volume = 10 cm³

Substitute the values into the above formula and solve

That's

Density =  \frac{89.6}{10}

We have the final answer as

<h3>Density = 8.96 g/cm³</h3>

Hope this helps you

7 0
3 years ago
Don't just use this question for points-
makvit [3.9K]
I believe it is 3 maybe

Hope I got it right
8 0
3 years ago
Other questions:
  • Which of these is always equal to the molar mass of any element?
    5·2 answers
  • How many inches are in 450 cm ?
    5·1 answer
  • How do scientists test their ideas?
    6·2 answers
  • Suppose you are asked to determine whether a nugget is made of gold on the basis of its density. You weigh the nugget and find t
    8·1 answer
  • Which term is a measure of how much work an object can do? target mass velocity energy
    9·1 answer
  • What is gas made up of?
    8·1 answer
  • NEED HELP ASAP!!!
    8·1 answer
  • Which substance is an ionic solid? A. LiCl B. HCl C. Ne D. Fe
    13·1 answer
  • If a photon dropping from the n = 7 to the n = 1 level hit the surface of Au, what would be the wavelength of the ejected electr
    8·1 answer
  • Please help thank you so much
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!