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
Andre45 [30]
3 years ago
13

What is Avogadro's number, and why is it useful? (3 points)

Chemistry
1 answer:
SashulF [63]3 years ago
4 0

Answer:

6.022 x 10²³; it is a conversion factor between moles and number of particles

Explanation:

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 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole of hydrogen  = 6.022 × 10²³ atoms of hydrogen

238 g of uranium = 1 mole of uranium = 6.022 × 10²³ atoms of uranium

By taking ions:

62 g of NO⁻₃ =  1 mole of  NO⁻₃  = 6.022 × 10²³ ions of  NO⁻₃

96 g of SO₄²⁻ = 1 mole of SO₄²⁻ =  6.022 × 10²³ ions of  SO₄²⁻

You might be interested in
If an element has an atomic number of 20 and a mass number of 41, what is the :
iVinArrow [24]

Answer:

20 protons, 20 electrons, and 21 neutrons

Explanation:

The atomic number of an atom is the number of protons it has. If the atomic number is 20 then we know the atom has 20 protons.

•The mass number of an atom is the total number of protons and neutrons the atom contains. The mass number is 41 and the number of protons is 20, just subtract 20 from 41 and you will get the number of neutrons: 41 - 20= 21. The atoms has 21 neutrons.

•The number of electrons found in an atom is equal to the number of protons. The atoms has 20 protons which means it has 20 electrons.

So, the answer is:

20 protons, 20 electrons, and 21 neutrons

8 0
3 years ago
What contains elements with similar properties in the periodic table?
Nataly [62]
A) a column

example: earth alkaline metals
6 0
3 years ago
Read 2 more answers
Which medical condition(s) can prevent molecules from entering the cell?
kvasek [131]

Answer:

Explanation:

any type of spreading disease that kills

6 0
2 years ago
Read 2 more answers
I NEED HELP QUICK! BRAINLIEST TO WHO IS RIGHT!
Travka [436]

Answer:

3rd option

Explanation:

3 0
2 years ago
Can I find a tutor to help me with this question?
Eddi Din [679]

INFORMATION:

We have the following statements

And we must complete them

STEP BY STEP EXPLANATION:

To complete the statements, we need to classify matter according to its state:

- Solid:

there is not enough thermal energy to overcome the intermolecular interactions between the particles. As a result, solids have a definite shape and volume.

- Liquid:

That describes the liquid state. In a liquid, the particles are still in close contact, so liquids have a definite volume. However, because the particles can move about each other rather freely, a liquid has no definite shape and takes a shape dictated by its container.

- Gas:

That describes the gas state, which we will consider in more detail elsewhere. Like liquids, gases have no definite shape, but unlike solids and liquids, gases have no definite volume either.

Finally, we know that:

- A solid has a definite volume and has a definite shape

- A liquid has a definite volume and has not a definite shape

- A gas has not a definite volume and has not a definite shape

ANSWER:

- A solid has a definite volume and has a definite shape

- A liquid has a definite volume and has not a definite shape

- A gas has not a definite volume and has not a definite shape

8 0
11 months ago
Other questions:
  • Predict the effect of a mutation which limits the production of pigment in hair
    5·1 answer
  • Draw the structural formula of trans-1,3-dimethylcyclohexane in the chair conformation. Choose a chair from the Templates toolba
    10·1 answer
  • Onetaq standard reaction buffer fungal metagenomics
    15·1 answer
  • A neutral atom possesses an atomic number of 15 and an atomic mass of 31. Three electrons are gained. What is the result of this
    15·2 answers
  • How to assign oxidation and reduction numbers
    15·1 answer
  • Which of the following amino acids have more than one asymmetric center?
    13·1 answer
  • What is the significance of an electronegativity difference of 1.7 between 2 atoms?
    11·2 answers
  • What is the difference between being imaginative in doing science and doing psuedoscience?
    9·1 answer
  • Which of the following is NOT an
    7·2 answers
  • Some alkenes have geometric (cis-trans) isomers because ________. all of the carbon atoms in the compound are rigid and cannot r
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!