Question

Rita divides Avogadro’s number (approximately 6.02214 mc002-1.jpg 1023) by 2.055 to calculate the number of atoms in a sample. Which expression gives her result to the correct number of significant figures?

Answer 1

2.930 x 10^23 is the correct answer

Answer 2

when we have Avogadro's number with four significant figures 6.022 x 10^23

and we have also this number 2.055 is also with four significant figures so,

the number of atoms = Avogadro's number / 2.055

= 6.022 x 10^23 / 2.055

= 2.930 x 10^23

and we can see that the result is number with four significant figures