How many moles of titanium are in a sample containing 2.8 x 10^24 atoms?

1) 1.69 x 10^48
2) 4.65 x 10^43
3) 4.65
4) 0.0465
5) 48

3 answers

There are 6.02E23 atoms in a mole of atoms; therefore, ......
got 4.65, not sure if it's right
Of course it's right.
2.8E24 atoms x (1 mol atoms/6.02E23 atoms) = 4.65 mol.