How many moles are 1.20 x 1025 atoms of phosphorous?
Answers
Answer:
your answer is 19.969 moles.
Explanation:
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Explanation:
Explanation:
A mole is a unit of measurement, but more specifically, it is an amount. Just like a dozen of a thing means 12 things, a mole measures the amount of something. The number of a certain thing in a mole is
6.022
⋅
10
23
; that number is called Avogadro's number. So a mole of potatoes is
6.022
⋅
10
23
potatoes, or a mole of cars is
6.022
⋅
10
23
cars.
This can be applied to chemistry to help convert between atoms to grams. The beauty of Avogadro's number is that
6.022
⋅
10
23
molecules of a certain compound weighs its atomic mass in grams. For example, iron trichloride
F
e
C
l
3
has an atomic mass of 162.195. So a mole of
F
e
C
l
3
weighs 162.195 grams.
Now that the concept of moles is established, you know that a mole of anything has
6.022
⋅
10
23
things in it. For phosphorous or any chemical compound, a mole contains
6.022
⋅
10
23
molecules in it. So if you have
1.20
⋅
10
25
(that's what I assume you meant) atoms of phosphorous, then just divide by Avogadro's number to find the number of moles.
1.20
⋅
10
25
A
T
O
M
S
6.022
⋅
10
23
A
T
O
M
S
M
O
L
You would get
19.969
moles.
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.
.
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