Question

How many atoms are in 4 O2?
2
4
6
8
10

Answer 1

Okay, each \(O_2\) molecule has 2 oxygen atoms, and there are 4 of these molecules.

\(\sf 4*2~O=8~O\)

Answer 2

I thought it was \(6\)

Answer 3

how so?

Answer 4

So each time you mulitply not add?

Answer 5

yes, you would multiply.

\(4~Cl_2\)= 8 atoms

\(3~O_3\)=?

Answer 6

The small number (subscript) tells you how many atoms of that type there are

Answer 7

\(9\) atoms?

Answer 8

yup!

Answer 9

Yay! At least Im understanding something!!!

Answer 10

hehe try this one.

How many atoms in \(\sf 3~CaO_2\)?

Answer 11

\(6\) atoms?

Answer 12

there are 6 oxygen atoms, but what about Ca?

remember that when nothing is written, the subscript is 1

so it reads, \(\sf Ca_1O_2\)

Answer 13

Wait..so Ca is still 3?

Answer 14

in this case, \(\sf 3~CaO_2\), yes there are 3 Ca atoms plus the 6 oxygen atoms

Answer 15

iGHT let me write that down also

Answer 16

okay cooool