Question

How many moles of bromine (Br) atoms are in a sample of 2.03 × 1024 atoms?

0.297 mol Br
3.37 mol Br
12.3 mol Br
1.22 × 1047 mol Br

Answer 1

use the formula: \(\sf moles=\dfrac{\#~of~atoms}{N_A}\)

where \(N_A\) is avogadro's number

Answer 2

still need help understanding

Answer 3

what don't you understand?

Answer 4

How to solve it like where to put numbers and what the answer is

Answer 5

it's a division. you divide the number of atoms in the sample by avogadro's number.

\(N_A=6.022*10^{23}\)

Answer 6

whats the answer then

Answer 7

just use a calculator

Answer 8

but the exponents

Answer 9

@aaronq

Answer 10

what about them?

just type it into your calculator or use this one if you want http://web2.0calc.com/