. Which of these weighs most?
(1) 32 g oxygen
(2) 2 g atom of nitrogen
(3) 0.5 mole of iron
(4) 3.01 * 1023 atoms of carbon
Answers
Answered by
6
Answer:
Answer:
C
o
2
O
3
......
cobaltic oxide
Explanation:
We interrogate the molar quantities of metal and oxygen.....
Moles of cobalt
=
1.216
⋅
g
58.9
⋅
g
⋅
m
o
l
−
1
=
0.0207
⋅
m
o
l
.
Moles of oxygen
=
0.495
⋅
g
16.0
⋅
g
⋅
m
o
l
−
1
=
0.0309
⋅
m
o
l
.
We divide thru by the smallest molar quantity, that of the metal, to get a trial empirical formula of.....
C
o
0.0207
⋅
m
o
l
0.0207
⋅
m
o
l
O
0.0309
⋅
m
o
l
0.0207
⋅
m
o
l
=
C
o
O
1.49
....
But by specification, the empirical formula is the simplest whole number ratio defining constituent atoms in a species...and so....
C
o
2
O
3
.....
This is not a good question inasmuch as
C
o
2
O
3
is poorly characterized and possibly unknown. There are
C
o
O
, and
C
o
3
O
4
, a mixed cobalt oxide of
C
o
O
, and
C
o
2
O
3
....
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