Question

Calculate the amount, in mol, of sodium atoms represented by 1.0x10(to the power of 20) sodium atoms

Answer 1

Step-by-step explanation:

moles= number of particle or atom / 6.02×10^23

so

`\frac{1.1 * {10}^(20 ) }{6.02 * {10}^(23) }`

gives u 1.83×10^-4 moles

hope it make sense :)

Answer 2

1.7 * 10^-4 moles

Step-by-step explanation:

According to Avogadro, one mole of a substance contains 6.02 * 10^23 number of atoms, molecules, ions etc.

Hence;

1 mole of Na contains 6.02 * 10^23 atoms

x moles of Na contains 1.0x10^20 atoms

x = 1.0x10^20 * 1/6.02 * 10^23

x = 1.7 * 10^-4 moles