Question

PLSSSSSSSS help !!!!! One mole of an element contains which of the following?

6.02 atoms

6.02 x 1023 atoms

6.02 x 1023 grams

12 atoms

Answer 1

6.02 × 10²³ atoms

Step-by-step explanation:

The number 6.02 × 10²³ is called Avogadro number. It is the number of atoms, ions and molecules in one gram atoms of an element, one gram ions of substance and one gram molecule of a compound.

For example:

32 g of oxygen = one mole = 6.02 × 10²³ atoms O.

1.008 g of hydrogen = one mole = 6.02 × 10²³ atoms of H.

or

18 g of H₂O =one mole = 6.02 × 10²³ molecules of H₂O

44 g of CO₂ = one mole = 6.02 × 10²³ molecules of CO₂

or

62 g of NO₃⁻ = one mole of NO₃⁻ = 6.02 × 10²³ ions of NO₃⁻