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valina [46]
2 years ago
5

It takes 498. kJ/mol to break an oxygen-oxygen double bond. Calculate the maximum wavelength of light for which an oxygen-oxygen

double bond could be
broken by absorbing a single photon.
Be sure your answer has the correct number of significant digits.
Chemistry
2 answers:
Neporo4naja [7]2 years ago
5 0

The bond energy required to break the oxygen-oxygen double bond is 240 nm

The energy of the incoming photon = 498 * 10^3 J/mol/6.02 * 10^23 moles = 8.27 * 10^-19 J

Recall that;

E = hc/λ

E = energy of the photon

c = speed of light = 3 * 10^8 m/s

λ = wavelength of photon

h = Plank's constant = 6.63 * 10^-34 Js

λ = hc/E

λ = 6.63 * 10^-34 * 3 * 10^8/8.27 * 10^-19

λ = 2.40 * 10^-7 m

λ = 240 nm

Learn more: brainly.com/question/24302171

Lyrx [107]2 years ago
5 0
  • Energy=498KJ =498×10^3J

We know

\\ \sf\bull\longmapsto E=hv

  • h=planks constant
  • v=frequency

\\ \sf\bull\longmapsto v=\dfrac{E}{h}

\\ \sf\bull\longmapsto v=\dfrac{498\times 10^3J}{6.626\times 10^{-34}Js}

\\ \sf\bull\longmapsto v=75.15\times 10^{37}s^{-1}

\\ \sf\bull\longmapsto v=7.5\times 10^{36}s^{-1}

Now

\\ \sf\bull\longmapsto \lambda=\dfrac{C}{V}

\\ \sf\bull\longmapsto \lambda=\dfrac{3\times 10^{8}ms^{-1}}{7.5\times 10^{36}s^{-1}}

\\ \sf\bull\longmapsto \lambda=2.5\times 10^{-28}m

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Drupady [299]

What amount of heat absorbs 50 g of steel (ce = 0.115 cal / g. ° C) that

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Answer:

143.75cal

Explanation:

Given parameters:

Mass of steel  = 50g

Specific heat capacity of the steel  = 0.115cal/g°C

Temperature  = 25°C

Unknown:

Amount of heat = ?

Solution:

The amount of heat to cause this temperature change is dependent on mass and specific heat capacity of the substance.

  Amount of heat  = m C (ΔT)

m is the mass

c is the specific heat capacity

ΔT is the temperature change

 Now insert the parameters and solve;

  Amount of heat  = 50 x 0.115 x 25

  Amount of heat  = 143.75cal

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430 g of AgCl would be needed to make a 4.0m solution with a volume of 0.75 L.

<h3>What is Molarity?</h3>
  • The amount of a substance in a specific volume of solution is known as its molarity (M).
  • The number of moles of a solute per liter of a solution is known as molarity.
<h3>Calculation of Required amount of AgCl</h3>

Remember that mol/L is the unit of molarity (M).

We can compute the necessary number of moles of solute by multiplying the concentration by the liters of solution, according to dimensional analysis.

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Then, using the periodic table's molar mass for AgCl, convert from moles to grams:

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