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3 years ago

Which color of light has the highest energy

2 answers:

6 0

Purple, or ultraviolet light has the highest energy. This is why ultraviolet light is dangerous, because the more energy light has, the more damaging it is.

Snezhnost [94]3 years ago

5 0

Ultraviolet has the highest energy light

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A) The average molecular speed in a sample of Ar gas at a certain temperature is 391 m/s. The average molecular speed in a sampl

diamong [38]

Answer:

For A: The average molecular speed of Ne gas is 553 m/s at the same temperature.

For B: The rate of effusion of $SO_2$ gas is $1.006\times 10^{-3}mol/hr$

Explanation:

For A:

The average molecular speed of the gas is calculated by using the formula:

$V_{gas}=\sqrt{\frac{8RT}{\pi M}}$

$V_{gas}\propto \sqrt{\frac{1}{M}}$

where, M is the molar mass of gas

Forming an equation for the two gases:

$\frac{V_{Ar}}{V_{Ne}}=\sqrt{\frac{M_{Ne}}{M_{Ar}}}$ .....(1)

Given values:

$V_{Ar}=391m/s\\M_{Ar}=40g/mol\\M_{Ne}=20g/mol$

Plugging values in equation 1:

$\frac{391m/s}{V_{Ne}}=\sqrt{\frac{20}{40}}\\\\V_{Ne}=391\times \sqrt{2}=553m/s$

Hence, the average molecular speed of Ne gas is 553 m/s at the same temperature.

For B:

Graham's law states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass of the gas. The equation for this follows:

$Rate\propto \frac{1}{\sqrt{M}}$

Where, M is the molar mass of the gas

Forming an equation for the two gases:

$\frac{Rate_{SO_2}}{Rate_{Xe}}=\sqrt{\frac{M_{Xe}}{M_{SO_2}}}$ .....(2)

Given values:

$Rate_{Xe}=7.03\times 10^{-4}mol/hr\\M_{Xe}=131g/mol\\M_{SO_2}=64g/mol$

Plugging values in equation 2:

$\frac{Rate_{SO_2}}{7.03\times 10^{-4}}=\sqrt{\frac{131}{64}}\\\\Rate_{SO_2}=7.03\times 10^{-4}\times \sqrt{\frac{131}{64}}\\\\Rate_{SO_2}=1.006\times 10^{-3}mol/hr$

Hence, the rate of effusion of $SO_2$ gas is $1.006\times 10^{-3}mol/hr$

8 0

3 years ago

Apple juice can be classified as which of the following?

HACTEHA [7]

Answer:

mixture

Explanation:

5 0

3 years ago

Read 2 more answers

Helpz me pleaz! I don't quite get it

harina [27]

Answer:

Al2O3

Explanation:

Al2O3 has an ionic bond because the bonds between them are very strong

8 0

3 years ago

Read 2 more answers

Which chemical symbols will complete the equation for this single displacement reaction? 2NaBr + Cl2 → 2 blank blank + blank 2

arsen [322]

The symbols that will complete the equation for single displacement reaction is 2NaCl + Br2

Explanation

The balanced equation is as below

2NaBr + Cl2→ 2NaCl + Br2

A single displacement reaction is type of reaction in which element react with compound and take place of other element in that compound.

Mostly the more reactive element displaces the less reactive elements from its compound.

Chlorine (Cl2) is more reactive than bromine(Br2) therefore chlorine displaces bromine from its compound.

4 0

4 years ago

Why would a scientist measure the amount of carbon-14 a fossil contains

stiv31 [10]

A scientist would measure the amount of carbon-14 (¹⁴C) in a fossil to determine its age.

The ¹⁴C:¹²C ratio is constant in living organisms. When they die, the radioactive ¹⁴C decays, so the ratio changes. The half-life for the for the decay is 5730 a, so scientists can work backwards and calculate how long ago the plant died. The method is good for determining the age of fossils up to 50 000 a old.

4 0

3 years ago