Answer:
1) increase
2) increase
Explanation:
Entropy is the degree of disorderliness or randomness of a system. It is the measure of the unavailable energy in a system.
Entropy increases with increase in the number of particles. If the number of particles in a system increases from left to right, the entropy of the system increases accordingly.
In reaction 1, the number of particles from left to right increased from two to three hence the entropy was increased.
In reaction 2, the number of particles from left to right increased from three to five hence the entropy was increased.
equation is balanced when the number of molecules are the equal in both reacting side and the product side.
Li(s) + n2(g) ---> Li3n(s)
From the equation above the reaction is not balanced since the molecules are not equal in both reacting side and the product side.
The reaction is balanced by adding 6 in front of Li and 2 infront of Li3n
that is
6Li(s) + n2(g)-----> 2Li3n(s)
<span>Because protons and neutrons are so much more massive than electrons, almost all of the atomic mass in any atom comes from the nucleus, which contains all of the neutrons and protons.</span>
Answer:
As the Earth rotates, it also moves, or revolves, around the Sun. ... As the Earth orbits the Sun, the Moon orbits the Earth. The Moon's orbit lasts 27 1/2 days, but because the Earth keeps moving, it takes the Moon two extra days, 29 1/2, to come back to the same place in our sky.
Explanation:
Answer:
C₆H₅NH₂ + H₂O = C₆H₅NH₃⁺ + OH⁻
[OH⁻] = 1.1 × 10⁻⁵ M
pOH = 5.0
pH = 9.0
[H₃O⁺] = 1.0 × 10⁻⁹ M
Explanation:
Let's consider when aniline behaves as a Bronsted-Lowry base.
C₆H₅NH₂ + H₂O = C₆H₅NH₃⁺ + OH⁻
We can calculate [OH⁻] using the following expression.
[OH⁻] = √(Kb × Cb) = √(3.9 × 10⁻¹⁰ × 0.30) = 1.1 × 10⁻⁵ M
where,
Kb: base dissociation constant
Cb: concentration of the base
The pOH is:
pOH = -log [OH⁻]
pOH = -log 1.1 × 10⁻⁵ = 5.0
The pH is:
pH + pOH = 14
pH = 14 - pOH = 14 - 5.0 = 9.0
The [H₃O⁺] is:
pH = -log [H₃O⁺]
[H₃O⁺] = antilog -pH = antilog -9.0 = 1.0 × 10⁻⁹ M
