Question

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

Answer 1

Answer:

4.65 moles

Explanation:

To calculate this, we can use Avogradro's Number: 6.022*10^23

$2.8*10^2^4*\frac{1mole}{6.022*10^2^3} =4.65mol$

So, there are 4.65 moles in 2.8*10^24 atoms of Ti