# Question #6ba04

Sep 7, 2016

The last step is incorrect.

#### Explanation:

You set the problem up correctly, but the last step

$\frac{4.136625 \cdot {10}^{24}}{6.022 \cdot {10}^{23}} = 6.869$

Then using the correct number of sig figs (from the 3 significant digits in 2.25) should give you 6.87g. Don't forget the unit.

It looks like you added the exponents in the last step. Learn to use the scientific notation key (EE) on your calculator.