How many moles of atoms are in 2.00 g of 13c?

There are 0.154 moles of atoms in 2.00 g of carbon-13.

Hence;

Molar mass = mass of a substance/ Number of moles  

     g/mol = g /mole  

Thus;

That is; Mass = moles x molar mass  

We have; n = m/M

Number of moles = Mass of the substance/ Molar mass

Mass = 2 g of Carbon-13  

Molar mass = 13.0 g/mol  

Since; Number of moles = Mass/ molar mass

Thus;

Moles = (2.0 g)/ (13.0 g/mol)

          = 0.154 moles  

Keywords: Moles, Molecular mass, relative atomic mass  

Level: High school  

Subject: Chemistry  

Topic: Moles  

Sub-topic: Moles, molecular mass and mass of a pure substance.

it is b that is the answer.