Question

How many potassium atoms are in 250.0 grams of potassium?


1.66 x 10−24 atoms K

3.85 x 1024 atoms K

1.51 x 1026 atoms K

5.88 x 1027 atoms K

Answer 1

\[250.0g\ K*(\frac{1mol\ K}{39.0983g\ K})*(\frac{6.022 \times {10^{23}}atoms\ K}{1mol\ K})=3.85 \times {10^{24}}atoms\ K\]