Question

To two decimal places, what is the mass in grams of one atom of helium? express your answer in proper scientific notation.

Answer 1

6.64 x 10^-24 gm

Step-by-step explanation:

One mole ( 6.022 x 10^23 atoms) of Helium = 4.00 gm

4.00 gm / 6.022 x 10^23 = .664 x 10^-23 gm = 6.64 x 10^-24 gm