what is avogadro's number, and why is it useful? (3 points)

a. 2.033 x 1023; it is a conversion factor between moles and number of particles

b. 2.033 x 1023; it is a conversion factor between moles and mass

c. 6.022 x 1023; it is a conversion factor between moles and mass

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

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⁻

The Avogadro number has been . It acts as a conversion factor between moles and the number of particles. Thus option D is correct.

Avogadro's number has been the constant value that gives the value of the number of atoms of a molecule in 1 mole of the sample.

The Avogadro number has been the proportionality constant and has been named after Sir Amedeo Avogadro. The numerical value that describes the value of the Avogadro number has been known as the Avogadro number or Avogadro constant. The value of the Avogadro constant has been .

In the mole concept, the value of the Avogadro number gives information about the number of atoms in a mole of the sample. Thus it acts as a conversion factor between moles and the number of particles.

Thus, the Avogadro number has been . It acts as a conversion factor between moles and the number of particles. Thus option D is correct.

For more information about the Avogadro's number, refer to the link:

link

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance