Question

How many different atoms are there in HNO3? 3 or 5 or what?

Answer 1

3, because there are 3 elements
(there are 5 atoms, but only 3 DIFFERENT kinds of atoms)

Answer 2

So what about Cu(NO3)2?

Answer 3

try it: how many different elements are there?
(that's also the number of different atoms)

Answer 4

There's three diff. atoms

Answer 5

correct! :)

Answer 6

:)

Answer 7

So what about the numbers? Should we do anything with them?

Answer 8

no, when you are triing to find the number of different atoms :) each element has a unique atom and that's it :)

Answer 9

Cool, I appreciate the help :D

Answer 10

Would you mind if you could help with one more example?

Answer 11

C12 H22 O11, that's just 3 atoms?

Answer 12

3 DIFFERENT ones :)
(but the total is 12+22+11=45)

Answer 13

Cool :)

Answer 14

whenever you need help, just tag me :)

Answer 15

Are you able to balance equations?

Answer 16

Chemical equations?

Answer 17

Yeah sure I'll tag you :)

Answer 18

this might help you :)
http://www.wikihow.com/Balance-Chemical-Equations

Answer 19

Gee you're really helpful

Answer 20

Btw, do you know the difference between the modes on a scientific calculator?

Answer 21

SD - standard deviation calculations
COMP - normal calculating
DEG - calculating using degrees
RAD - calculating using radians
GRA - calculating using grads
FIX - number of decimal place specifications
SCI - number of significant digit specification
NORM - cancels FIX and SCI settings

I had to look to the calculator manual, but I can explain all of them, if you want :)

Answer 22

Just DEG, RAD and GRA

Answer 23

you probably know, what is a degree.
1 radian is 2*pi degrees. (1 rad =3,14*2=6,28° )
1 gradian is radian/400.
So:

1 rad = 400 grad
1 grad = 1/400 = 0,0025 rad
1rad = 6,28 deg
1 deg = 1/6,28 rad
1 grad = 1/6,28/400 rad
1 deg = 1*6,28*400 grad