Question

Calculate the mass of 12.044×10^23 of an Oxygen atoms

Answer 1

Answer:

32g

Explanation:

No.of moles in oxygen atom

= given no. of particles/avagadro's no.

=12.044×10²³/6.022×10²³

=2moles

Mass of oxygen atom

=Molar mass×no.of moles

=16×2

32g

So,the mass of 12.044×10²³ oxygen atom is 32g

Answer 2

Given:

The number of Oxygen atoms= 12.044×10²³

To find:

The mass of the given oxygen atoms

Solution:

We can find the number of atoms by following the given process-

We know that the mass of atoms= Number of moles of atom× molar mass of oxygen

So, we will first find out the number of moles.

Number of moles= Given number of atoms/ Avogadro's number

=12.044×10²³/ 6.022×10²³

=12.044/6.022

= 2 mol

Also, the molar mass of an atom of oxygen is 16.

The mass of atoms= 16×2

= 32g

Therefore, the mass of 12.044×10²³ is 32g.