Question

what is the mass of 4.28 x 10^25 molecules of h20

Answer 1

Answer:

Explanation:

4.28x10^25  x (1mole H2O/6.022x10^23 H2Omolecules) x (18g/1mole H2O) = 1.2793 * 10^3 g

Answer 2

Answer:

Explanation:

n=N/L

n=4.28 x 10 ^25 /6.022 x 10^23

n=25.77 x 10^2

n=2577.416 moles

m=n x M

M=18

m=2577.416  x 18

m=46393.488 g