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Anastaziya [24]
3 years ago
12

The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effec

t. Which is a correct explanation of the photoelectric effect according to the model?
a)Electrons are emitted with more speed when brighter light strikes them.
b)Electrons need small amounts of energy to be released from an atom.
c)Electrons move between levels only if they are hit by the right frequency of light.
d)Electrons need specific amounts of energy to "jump" off an atom and be emitted.
Chemistry
2 answers:
muminat3 years ago
8 0
<span>d)Electrons need specific amounts of energy to "jump" off an atom and be emitted.</span>
asambeis [7]3 years ago
4 0
<span>The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effect. A correct explanation of the photoelectric effect according to the model is D. electrons need specific amounts of energy to "jump" off an atom and be emitted.</span>
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Explanation:

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Keith_Richards [23]

Answer:

The new pressure will be 0.225 kPa.

Explanation:

Applying combined gas law:

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

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P_1\text{ and }V_1 are initial pressure and volume at initial temperature T_1.

P_2\text{ and }V_2 are final pressure and volume at initial temperature T_2.

We are given:

P_1=0.29 kPa\\V_1=V\\P_2=?\\V_2=V+50\% of V=1.5 V

T_1=-25^oC=248.15 K

T _2 = 16^oC=289.15 K

Putting values in above equation, we get:

\frac{0.29 kPa\times V}{248.15 K}=\frac{P_2\times 1.5V}{289.15 K}

P_1=0.225 kPa

Hence, the new pressure will be 0.225  kPa.

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