Question

Silver (108 g) has a density 10.5g/cm^-3 the number of silver atom on a surface of area 10^-12 m^2 can be expressed in scientific notatation as y * 10^x the value x is?

Answer 1

well calculate the number of atom first by using n=(mass)/molar mass...to find mass use mass= density*volume and already you have surface area.....so you can calculate volume

Answer 2

V = 10 ^ -24 ???

Answer 3

did you get this as volume?

Answer 4

yes

Answer 5

then find the mass of that surface area...after that number of atoms by multiplying number of moles with avagadro's number

Answer 6

m = 10.5* 10^-18

Answer 7

number of moles= mass/ 108

Answer 8

lol...i just post to check..

Answer 9

okay can you do it now?

Answer 10

moles = 0.97 * 10^-19

Answer 11

no of atoms = 0.97 * 6.02 * 10^23

Answer 12

no

Answer 13

you forgot 10^-19

Answer 14

yes

Answer 15

atom = 5.83 * 10^4

Answer 16

but the answer should be 7

Answer 17

yes...i think so :)

Answer 18

@Ishaan94 @IsraelYkb @Callisto @ghazi

Answer 19

??

Answer 20

the answer should be 7

Answer 21

it shuld be 10^7

Answer 22

@UnkleRhaukus

Answer 23

@experimentX

Answer 24

lol @ghazi

Answer 25

@Yahoo! convert your density into gm/m^3 ..see area and density has different units...you'll have the answers.... kid :)

Answer 26

i did...lol

Answer 27

the ans given by me included..that

Answer 28

@ghazi

Answer 29

hmm...i understand lol

Answer 30

V = 10 ^ -24 m^3 = 10 ^(-24+6) = 10^-18

Answer 31

dude again mistake....volume= area*height ...how did you find height...and i can clearly state your question is mistaken :)

Answer 32

i assumed it as Cube

Answer 33

no...if you're assuming it as cube...then where's the height....secondly a surface area means to say in 2D you can't have thickness ...so how do you expect to calculate atoms??

Answer 34

hm....hm.. u r correct..))

Answer 35

so....is there a way to find the height

Answer 36

@ghazi

Answer 37

i guess NO

Answer 38

LOL.... if it is not a cube we cant fine it

Answer 39

nope...