Question

What is the mass (in grams) of 9.66*10 to the 24 molecules on methanol (CH3OH)

Answer 1

use these 2 equations:

\(n=\dfrac{N}{N_A}\) ; n=moles, N=number of particles, \(N_A\) =avogadros number

and \(n=\dfrac{m}{M}\) ; n=moles, M=molar mass (in g/mol), m=mass (in g)

Answer 2

@aaronq but i dont know how i would set it up. i keep getting the wrong answer?

Answer 3

can you plz help me solve it

Answer 4

okay, in the first equation, you're looking for moles

\(n=\dfrac{9.66*10^{24}}{6.022*10^{23}}\)

then in the second equation you're looking for mass:

\(n=\dfrac{9.66*10^{24}}{6.022*10^{23}}=\dfrac{m}{M_{methanol}}\)

so look up the molar mass of methanol and solve for m

Answer 5

im looking for it but im lost i cant find it:( @aaronq

Answer 6

use the periodic table (you have to add the mass of the individual atoms), CH3OH is not an element

Answer 7

okay so c its 12.01+1.01+16.00+1.01=30.03 so m = 30.03 is that correct

Answer 8

@aaronq

Answer 9

there are 4 hydrogens not 2

Answer 10

12.01+(3)1.01+16.00+1.01

Answer 11

@aaronq 32.05

Answer 12

then wats the next step or thats the answer

Answer 13

use the equation i wrote previously

Answer 14

yeah but can you help me solve cuz i dont have a calculator and i dont know how plz

Answer 15

@aaronq

Answer 16

http://web2.0calc.com

Answer 17

plug it into where molar mass goes and solve for m

Answer 18

k i try

Answer 19

@aaronq i cant:( it i cant do it can you solve it for me plz

Answer 20

why can't you? show me what you did

Answer 21

because in the example idk where 32.05 goes? so i divided by wat?

Answer 22

M= molar mass

\(M_{methanol}= 32.05\;g/mol\)

Answer 23

so 32.05 g thats the answer? because i try it nad it was wrong?

Answer 24

@aaronq

Answer 25

dude, use a calculator. I'm willing to help you but not do it for you.

Answer 26

aww u wont why?

Answer 27

:(

Answer 28

@abbieWhat is the mass (in grams) of 9.66*10 to the 24 molecules on methanol (CH3OH)

Answer 29

can u help me plz @abbie

Answer 30

I'm not good at this but here's an example I found
Divide 3.62x10^24 by 6.01 x 10^23 (Avogadro)
Then you find about 6 mol methanol.
The molar mass is (12 + 3 + 16 + 1) gram.
you add them and get an answer.

Answer 31

work on it and tell me what you get

Answer 32

@abbie yeah i did that and got 32.05 but it was it in grams

Answer 33

im stuck

Answer 34

@amistre64 can you help him?

Answer 35

@abbie what about this one how many atoms are in 187 g of calcium? _______atoms

Answer 36

how much does one molecule of the stuff weigh?

Answer 37

if m is equal to the mass of 1 molecule

then: m * 9.66 * 10^(24), is the mass they are looking for right?

Answer 38

YES

Answer 39

i got that part i added the mass by individual and got 32.05 but then what??

Answer 40

because i added C,H,O,H

Answer 41

\(\dfrac{9.66∗10^{24}}{6.022∗10^{23}}=\dfrac{m}{32.05 g/mol}\rightarrow m=\dfrac{32.05 g/mol*9.66∗10^{24}molecules}{6.022∗10^{23}molecules/mol}\)

Answer 42

so divided that or wat?] nad i got 5.32

Answer 43

g

Answer 44

@abbie how many atoms are in 187 g of calcium can u help do this one plz?

Answer 45

you need to work on your algebra.

Answer 46

i know and i got it wrong i havent had math is years thats why?

Answer 47

can u help me solve it @aaronq

Answer 48

you simply need to plug it into your calculator, it's 514.119893 g

Answer 49

thanks . i have another question convert 0.108 mol of lithium to grams? ___g

Answer 50

use \(n=\dfrac{m}{M}\)