Need help with 7,9 and may you check my answer for 8 to ?
2 answers:
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The order of frequency is d < a < c < b
eV
where z = atomic mass number
n = energy level
For hydrogen z = 1
Therefore, Energy for n = 1
eV
= -13.6 eV
for n = 2
eV
= -3.40 eV
for n = 3
eV
= -1.51 eV
for n = 4
eV
= -0.85 eV
for n = 5
eV
= -0.544 eV
n = 2 to n = 4 (absorption)
ΔE = E4 - E2 = -0.85 - (-3.40) = 2.55 eV
n = 2 to n = 1 (emission)
ΔE = E1 - E2 = -13.6 - (-3.40) = -10.2eV
The negative sign indicates that emission will take place.
n = 2 to n = 5 (absorption)
ΔE = E5 - E2 = -0.544 - (-3.40) = 2.856 eV
n = 4 to n = 3 (emission)
ΔE = E3 - E4 = -1.51 - (-0.85) = -0.66 eV
We know that
E = h * υ
Therefore, Energy is proportional to frequency.
So increasing the order of energy is
E4 < E1 < E3 < E2
order of frequency is
d < a < c < b
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# SPJ4
Answer:
SOCl2, Mg, CH3CHO, H3O^+
Explanation:
The reaction of the 2,2-dimethylpropan-1-ol with SOCl2 converts the alcohol to an alkyl halide. This now reacts with Mg metal to yield a Grignard reagent.
The Grignard reagent reacts with CH3CHO and acid to yield 4,4-dimethylpentan-2-ol as shown in the image attached to this answer.
Answer:
T₂ = 43.46 °C
Explanation:
Given that:
The heat of the formation of carbon dioxide = - 393.5 kJ/mol (Negative sign suggests heat loss)
It means that energy released when 1 mole of carbon undergoes combustion = 393.5 kJ = 393500 J
Heat gain by water = Heat lost by the reaction
Thus,
For water:
Mass of water = 5100 g
Specific heat of water = 4.18 J/g°C
T₁ = 25 °C
T₂ = ?
Q = 393500 J
So,
T₂ = 43.46 °C