Question

Please Help...
How many grams do 2.8 × 1022 atoms of oxy-
gen weigh?
Answer in units of g

Answer 1

@lalokio Can You Please Help Me?

Answer 2

Ah okay this one you divide by Avogadro number to get the number of moles then multiply by mass of oxygen 16.

Answer 3

\[2.8 × 10^{22} atoms O x \frac{ 1 mol O }{ 6.022 x 10^{23} atoms } x \frac{ 16 g O }{ 1 mol O }\]

Answer 4

26.6? @lalokio

Answer 5

is that one of the answers?

Answer 6

No it doesnt give me answers to choose from is that right though? @lalokio

Answer 7

I'm getting .74393 or 7.4 x 10^-1

Answer 8

Oh ok Thank you @lalokio