Convert the mass to moles:
40.0 grams of NH3 /
17.03 g/mol = 2.35 moles NH3<span>
<span>50.0 grams of O2 / 31.998 g/mol = 1.56 moles O2</span></span>
Get the actual ratio:
NH3/O2 = 2.35 / 1.56 = 1.5
The theoretical ratio is 4 NH3 to 5 O2,
that is:
(NH3/O2)theo = 4 / 5 = 0.8
<span>Since
actual > theoretical and the ratio is NH3/O2, therefore the limiting reagent
is O2.</span>
The reaction is
N₂O₄(g) <=> 2NO₂(g)
a. Initial pressure is 5.3 atm
We assume that the there is 1 mole at the start
N₂O₄(g) <=> 2NO₂(g)
1
-x 2x
---------------------------
1 - x 2x
The total moles is
1 + x
The mole fraction of N2O4 is
(1 - x)/(1 + x)
The mole fraction of NO2
2x/(1 + x)
Kp = [2x/(1 + x)]² / [(1 - x)/(1 + x)] = 0.25
Solve for x
And the total number of moles
The total pressure is solved by
(1 + x) (5.3)
The partial pressure of N2O4 is
5.3 (1 - x)
The partial pressure of NO4 is
5.3 (2x)
Do the same for the second problem.
C. Tetraphosphorus trisulfide
Answer:
A cation is an ion with fewer electrons than protons. Therefore, it has a positive charge. The electric charge on a proton is equal in amount to the charge on an electron. Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge. Halogens always form anions, alkali metals and alkaline earth metals always form cations. Most other metals form cations (e.g. iron, silver, nickel), whilst most other nonmetals typically form anions (e.g. oxygen, carbon, sulfur).
Explanation:
An anion and cation cannot be specifically found on the periodic table.
