Answer:
First option:
[NH3]2 / [N2][H2]3
Explanation:
First of all we need to determine the reaction:
N₂(g) + 3H₂(g) → 2NH₃(g)
1 mol of nitrogen can combine with 3 moles of hydrogen to produce 2 moles of ammonia.
Remember that Kc has to involve Molar concentrations of products / reactants
Concentration must be elevated to the stoichiometry coefficient
Kc for the reaction is: [NH₃]² / [N₂] . [H₂]³
For hydrogen-like atom electron transition from n=3 to n=5, it would be classified as an absorption of energy. For hydrogen-like atom electron transition from <span>n=3 to n=2, it would be classified as an emission of energy. Hope this helps. Have a nice day.</span>
Answer:
The molar mass of aluminum is 26.9 grams per mole. We start by converting the grams of aluminum to moles of aluminum.
m
o
l
A
l
=
3.78
g
A
l
×
1
m
o
l
A
l
26.9
g
=
0.1405
m
o
l
A
l
We use Avogadro's number to determine the number of aluminum atoms present in 0.1405 mol Al.
A
t
o
m
s
A
l
=
0.1405
m
o
l
A
l
×
6.022
×
10
23
1
m
o
l
A
l
=
8.46
×
10
22
a
t
o
m
s
A
l
