Question

What is the approximate mass of 6.022x10^23 12C atoms?

Answer 1

@somy could you help me with this?

Answer 2

What does the 12 C means?

Answer 3

12 is mass number

Answer 4

we write 12 C because there are isotopes of Carbon also
so by writing 12 we show which carbon isotope it is

Answer 5

don't mind that
they are asking for mass of an atom

Answer 6

after finding mass of 1 atom
u can find mass of 1 mole of atoms

Answer 7

atom consists of protons, neutrons and electrons

Answer 8

I know to find the mass of C is (1atom of C * 12g of C)/6.022x10^23 atoms of C

Answer 9

That would be the weight of 1 atom of Carbon

Answer 10

mole= mass/ Mr
mass= mole*Mr
mole is 1
because 1 mole has 6.022x10^23 atoms
Mr is 12

Answer 11

What is Mr?

Answer 12

molecular mass

Answer 13

How do I solve this then? I keep trying and I don't get the right answer.

Answer 14

what is the right answer?

Answer 15

7.2264x10^24

Answer 16

yes, that's right. How do I obtain that?

Answer 17

1 atom --- 12 g/mol
6.022x10^23 atoms --- X

X= (6.022x10^23) * 12

Answer 18

x= 1.9927x10^-23 What do I do after I find this?

Answer 19

oh wait...

Answer 20

What's the point of finding the mass of 1 atom?

Answer 21

lol u are making mistake

Answer 22

write 6.022x10^23 in bracket in ur calculator like this (6.022x10^23)

Answer 23

then multiply by 12

Answer 24

yes I know that part. I am wondering about the weight of 1 atom

Answer 25

well look mass of 1 atom would be its molecular mass

Answer 26

I am asked to find the mass of 6.022x10^23 C atoms.

Answer 27

but they are indirectly asking u for mass of 1 mole of 12C

Answer 28

1atom C*1mole/6.022x10^23 atom * 12g/1mol

Answer 29

1 atom of C has a mass of 12 amu
1 mole of C has 6.022x10^23 atoms
so if 1 atom has mass of 12 amu
how many amu would be mass of 6.022x10^23 atoms?

Answer 30

6.022x10^23 * 12 o.o

Answer 31

the amu unit confuses meee D;

Answer 32

since is in amu and not in mol, it is not 1mol C * 12g C, instead is 6.022x10^23 C amu * 12amu

Answer 33

yes

Answer 34

my god u are confusing me
6.022x10^23 atoms ---- u need to find amu (amu is molecular mass unit)

Answer 35

but but you said yes =.=''

Answer 36

u have mass of 1 atom
and its 12

now they gave you 6.022x10^23 atoms

so if u know mass of 1 atom
u can find mass of 6.022x10^23 atoms right?

Answer 37

alright look
u have 1 apple
and mass of is 30 grams
and then u have same apple but now 50 of them

Answer 38

if 1 apple is 30 grams
then 50 apples would be 30*50 = 1500 grams

Answer 39

How would you do it in the choo choo train?

Answer 40

lol jokes aside
do u understand?
after doing this (6.022x10^23) *12 you'll get 7.2264x10^24

Answer 41

it wasn't a joke =.=. that's how they call it here lol.

Answer 42

yes I understand that, I am trying to figure it out starting from the 6.022x10^23 atoms. with the train.

Answer 43

What do I multiply it by or divide to cancel atoms

Answer 44

u want to get the unit?

Answer 45

Yes, step by step. I want to understand the mathematic way of getting the answer.

Answer 46

\[mole= \frac{ mass }{molecular mass }\]

Answer 47

\[mass= mole * molecular mass\]

Answer 48

now units
unit of mole is mole
unit of molecular mass is g/mole
\[mole *\frac{ gram }{ mole }\]

Answer 49

since one side is in molecular mass (amu) then the mole in order to have the right unit must be in atoms.

Answer 50

moles cancel out and you are left with grams