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
Reil [10]
3 years ago
8

How many moles are represented by 3.01 - 1023 helium atoms?

Chemistry
1 answer:
Pavlova-9 [17]3 years ago
7 0

Answer:

0.5 mol

Explanation:

Given data:

Number of atoms of He = 3.01 ×10²³

Number of moles = ?

Solution:

Avogadro number:  

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.02 × 10²³ is called Avogadro number.

1 mole = 6.02 × 10²³ atoms

3.01 ×10²³ atoms × 1 mol / 6.02 × 10²³ atoms

0.5 mol

You might be interested in
NO LINKS PLEASE! Why does dye dropped into a cup of water eventually spread throughout the water?
Nezavi [6.7K]

Answer:

C

Explanation:

okay, you need to look at the structures of the particles of matter in the solid, liquid and gas.

  • particles in a solid are in fixed positions, where they can only vibrate in those positions ( take a look at ice, or rather, a brick)
  • liquids have very small or rather, no spaces between them, but they can slide or rub against each other, like people in a <em>really tight</em> crowd I guess
  • gas particles have very large spaces between them and they move randomly. these exibit what's called brownian motion.
  • since water particles (and all other liquid particles) have negligible spacings and limited movement, that allows the dye particles to move from a region of high concentration to that of a low concentration. the aim for this is for the mixture/solution to reach an equilibrium, that  is the mixture must get to a point where all regions have the same concentration of the dye.

you can refer to your coursebooks :)

correct where wrong please:)

5 0
2 years ago
Why would a plant use the energy and resources to grow a fruit?
Step2247 [10]

Answer:

because a fruit holds the seeds it needs to reproduce and continue living.

3 0
3 years ago
A solution is prepared from 8 grams of acetic acid ( CH3COOH ) and 725 grams of water.What is the molality of this solution?0.00
Iteru [2.4K]

Answer:

its 725 grams 0.0002 725.000

Explanation:

4 0
2 years ago
What happens when potassium metal react with nitric acid
Marrrta [24]

Answer:

Astamañana vaya buenas noches

3 0
3 years ago
"what is the probability of finding an electron within one bohr radius of the nucleus"
Katena32 [7]
Your answer is going to be b
6 0
3 years ago
Other questions:
  • Which of these is an example of asexual reproduction?
    13·1 answer
  • Hydrocarbons consisting of short carbon chains are ________.
    11·1 answer
  • A substance has a melting point of °C. Tom says the substance is liquid at 20 ° C. Ben says it could be liquid or gas. Explain w
    6·2 answers
  • Dihydrogen sulfide reacts with oxygen gas to form sulfur dioxide and water. How many moles of oxygen gas will react when 0.6469
    15·1 answer
  • HELP ASAP PLEASE, I WILL GIVE BRAINLIEST
    15·1 answer
  • The size of the orbital is determined by the
    15·1 answer
  • How does acid base extraction work.
    13·2 answers
  • If you have 50 grams of water, how many moles would that be?*
    12·1 answer
  • Use Boyle's Law to interpret the following problem and then select the correct answer below.
    15·1 answer
  • The enthalpy of fusion for Hg is 2.29 kJ/mol. What is the energy change when 78.0 g of Hg melts at −38.8°C?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!