How many helium atoms are present in 7.16 moles of helium atoms? What is the answer in scientific notation?

Hey there!

There are 6.022 x 10²³ atoms in one mole.

We have 7.16 moles.

7.16 x 6.022 x 10²³ = 43.1 x 10²³ = 4.31 x 10²⁴

There are 4.31 x 10²⁴ helium atoms in 7.16 moles of helium atoms.

Hope this helps!

the answer is a and have a great day

b. is the answer hoped i