## anonymous 4 years ago CALCULATE mass of 2.2 x 10^20 Ag atom. the answer is 0.0432 g but i keep getting 0.0394 g. Somebody pls help explain this to me!

1. anonymous

2.2x10^20/6.023x10^23 then multiply by mass of Ag

2. anonymous

I got 0.0394 as well

3. .Sam.

using ratio method, $2.2 \times 10^{20} \text{Ag atom} \times \frac{1~mol}{6.02 \times 10^{23}atom} \times \frac{107.9g}{1mol}=0.039g~Ag$ Your answer is correct

4. anonymous

thank you!