Question

Which of the following has the greatest mass, in grams?

1 atom of gold (Au)

1.0 mol mercury (Hg) atoms

2.0 mole of chlorine (Cl) atoms

25 atoms of mercury (Hg)

@ganeshie8

Answer 1

gold=196
chlorine=35
mercury=200 but i dont know what mercury is

Answer 2

mol represents Avogadro number which is very huge, so we can eliminate first and last options

Answer 3

answer is either B or C

Answer 4

as you said, 1 mol of Hg weighs 200g

Answer 5

what about Chlorine, how much it weigh ?

Answer 6

chlorine is 35 grams

Answer 7

yes so 1 mol weighs 35 grams,
2 mol weighs how much ?

Answer 8

A) Au is 196 g/mol
B) i just dont know what this one is
C) Cl is 35 g/mol
D) Hg is 200 g/mol

Answer 9

but the question is which has the greatest so wouldnt it be d?

Answer 10

we have eliminated A and D options in the starting itself >.<

Answer 11

but whyyyyy when were looking for the biggest

Answer 12

look at my first two replies in this thread

Answer 13

Hg is 200g/mol

but in option D, they want you take only 25 atoms right ?

Answer 14

Do you know how many atoms will be there in 1 mol ?

Answer 15

.-.

Answer 16

1 mol = 6*10^23 atoms

Answer 17

that means, if you take 6*10^23 atoms of mercury, then it would weigh 200g

Answer 18

yeah cuz that the advocato number

Answer 19

so whats the weight of 25 atoms ?

Answer 20

25 is negligible compared to 6*10^23, right ?

Answer 21

.-. sure

Answer 22

so masses of A and D options are negligibel compared to Avogadro number.

Answer 23

thats the reason we have eliminated them earlier.

Answer 24

i like calling it the advocato number c:

Answer 25

and okay

Answer 26

but since c is so tiny it must be b

Answer 27

A) negligible
B) Hg is 200g/mol
C) Cl is 35 g/mol => 70 g/2mol
D)negligible

Answer 28

B is right ^^

Answer 29

yay so i was right :D

Answer 30

ofcourse you're right as always :P

Answer 31

naw your always right :)