One mole of an element contains which of the following?

a. 6.02 atoms

b. 6.02 x 1023 atoms

c. 6.02 x 1023 grams

d. 12 atoms

Answer : The correct option is, (B) atoms.

Explanation :

Mole : It is defined as the amount of substance that contain the same number of units as there are atoms present in exactly 12 grams of carbon-12.

Avogadro's number : It is defined as the number of atoms molecules present in a mole of any substance.

The Avogadro's number is represented as,

The relationship between a mole and Avogadro number are :

As, 1 mole of a substance contains number of atoms, molecules or ions.

Hence, the correct option is, (B) atoms.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.