Question

how many atoms are in 187 g of calcium? can someone help me pls

Answer 1

use the formulas i showed you before,

\(moles=\dfrac{mass}{molar\;mass}\) and \(moles=\dfrac{particles}{avogadros\;number}\)

Answer 2

187/12.01 right

Answer 3

Where did you get 12.01??

Answer 4

That's not the molar mass for calcium

Answer 5

idk i dont know how to it? can u help do it plz

Answer 6

i want how many atoms are in 187 g of calcium

Answer 7

Follow what the person above me first told you. Divide the mass given by the \(\sf \color{red}{molar~mass}\) of calcium. Then by avogadro's number, which is: \(\sf \color{blue}{6.022 \times 10^{23} \frac{atoms}{mol}}\)

Answer 8

The molar mass can be found by looking at your periodic table, where it says "Ca" for calcium.

Answer 9

so thats the answer

Answer 10

No, that's not the answer. You have to solve for it. I gave you the steps

Answer 11

the calcium is 40.08

Answer 12

@emanuelfarias sory I see your qts now wait for 3 minutes

Answer 13

\[2.0809x10^{24}\]

Answer 14

@GTXMUQSIT okay just need this question how many atoms are in 187 g of calcium?

Answer 15

2.0809x10 to the power 24 atoms

Answer 16

@emanuelfarias

Answer 17

its wrong:(

Answer 18

why?

Answer 19

@GTXMUQSIT

Answer 20

IDK

Answer 21

what's the anwer then? @emanuelfarias

Answer 22

answer

Answer 23

i have 5 min to finish it idk
is not telling me omg

Answer 24

okay so we need 187g of calcium to atoms right

Answer 25

there are 2 ways to write the answer first I told ya second 20.809x10 to the power 23

Answer 26

yeah first divide given mass with molar mass then multiply it with avagadro's no.

Answer 27

nope it didint work

Answer 28

idk but with the first u say 2.0809 is not 20.809

Answer 29

@emanuelfarias buddy \[2.0809*10^{24}\]

Answer 30

\[20.089*10^{23}\]

Answer 31

both same thing

Answer 32

@emanuelfarias

Answer 33

Follow my instructions. Don't give direct answers.

Answer 34

20.809x10 to the power 23 and 2.809x10 to the power 24 both are same in term of scientific notation just see decimal @emanuelfarias

Answer 35

@abb0t I have proved him above how to solve

Answer 36

oh okay

Answer 37

@GTXMUQSIT Thanks alot u were alot of help u r the best:) thank u again im going off to class

Answer 38

@emanuelfarias ok welcome

Answer 39

@GTXMUQSIT HEllo

Answer 40

@emanuelfarias how are you?

Answer 41

@GTXMUQSIT HI

Answer 42

good and u