Question

Using Avogadro's Number (6.02*10^23): Calculate the number of molecules in 3.00 moles H2S . Express your answer numerically in molecules.
Calculate the number of moles of Cl atoms in 1.81×10^24 formula units of magnesium chloride,MgCl2 .

Answer 1

For the second part, it needs to be written numerically in Moles.

Answer 2

first one is simple if one mole gives the avogadro number of molecules then 3 moles gives how much it is simple maths

Answer 3

3?

Answer 4

1mole -avogadro number of molecules (value)
3 moles-X number of molecules
X=?

Answer 5

should I times Avogadros number? (6.02*10^23)3

Answer 6

yaaa right

Answer 7

Well that can 't be right becuase I get a syntact error on my calculator.

Answer 8

in case of second answer
avogadro number of formula units contain -2 moles of cl
1.81*1024 number of formula units contain -X mole
X-?

Answer 9

Would the answer be 2?

Answer 10

like previous on did u calculate

Answer 11

I finally got the first one. Now the second part...

Answer 12

2?

Answer 13

find out the value of X in the above equation i have mentioned like first problem
in case of avogadr number put its value

Answer 14

I multiply it by 2?

Answer 15

3.62*10^24

Answer 16

no
6.023*10 rest to24- 2moles of cl
1.81*10 rest to 23-X
X-?(cross multiplication

Answer 17

did u calculate

Answer 18

I'm trying.

Answer 19

ok try just do the cross multiplication
u understand the term cross multiplication

Answer 20

I know that, but I can't figure it out because the powers are so big. I just get the same thing they had.

Answer 21

those power will get cancelled

Answer 22

So then it's 6.02*1.81+2?

Answer 23

I'm not getting it.;

Answer 24

u dont know the cross multiplication