How many moles of copper are in 6,000,000 atoms of copper?

Question

anonymous · Answer

you only have one number
 so taking the number of atoms given to you 6million
 is there a conversion factor that relates the number of atoms ......to 1 mole?

anonymous · Answer

yes well I know I must do this 6000000(1mole/6.022 x 10^23) but my answer 9.96 x 10^28 doesn't match correct answer why?

anonymous · Answer

sorry im trying to plug it in in different ways to see why you come up with ^28 rather than ^-18

anonymous · Answer

right.. i tried too but . dont get it.

anonymous · Answer

oh got it 
parentheses

anonymous · Answer

you must have typed in 6000000$$\div 6.022 \times 10^{23}$$

anonymous · Answer

type $$6000000\div \left( 6.022\times10^{23} \right)$$

anonymous · Answer

ooooo....got it so i shouldnt worry about the # on top just replace it with 6000000... correct and divide by the avogadros #.

anonymous · Answer

that depends if the number on top is also in scientific notation then you also need parentheses around that one

anonymous · Answer

otherwise your calculator will just go from left to right

anonymous · Answer

ooo ok will keep that in mind thank you very much... :)

anonymous · Answer

so if 6 million was in sci notation you would type 
$$(6.00\times10^6) \div (6.022\times10^{23})$$

anonymous · Answer

np glad I could help :)