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lesya [120]
3 years ago
14

Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound

responsible for light absorption and the color of plants, chlorophyll, strongly absorbs light with a wavelength of . Calculate the frequency of this light. Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
aleksandr82 [10.1K]3 years ago
4 0

Answer:

f=4.67x10^{14}Hz

Explanation:

Hello,

The frequency and wavelength of electromagnetic waves propagating in free space might be related to each other by using the following equation:

c=λf

Solving for the frequency:

f=c/λ

Knowing that λ stands for the wavelength (642 nm for the mentioned incident light), c the light velocity (300.000 m/s) and f the frequency, we get the asked frequency as:

f=\frac{3x10^6m/s}{642x10^{-9}m} =4.67x10^{14}Hz}

Best regards.

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Calculate the equilibrium constant K for the following reaction: H2(g) +
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Answer:

192.9

Explanation:

From the question,

Ke = [HCL]²/[H₂][CL₂].......................... Equation 1

Where Ke = Equilibrium constant.

Given: [HCL] = 0.0625 M, [H₂] = 0.0045 M, [CL₂] = 0.0045 M

Substitute these values into equation 1

Ke = (0.0625)²/(0.0045)(0.0045)

ke = (3.90625×10⁻³)/(2.025×10⁻⁵)

ke = 1.929×10²

ke = 192.9

Hence the equilibrium constant of the system = 192.9

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3 years ago
Is the sweetened iced tea an electrolyte mixture?
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Answer:

Yes it is

Explanation:

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Tellurium is a period 5 chalcogen. Selenium is a period 4 chalcogen. If the only factor affecting ionization energies was the nu
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yes

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3 years ago
Consider the reaction H2(g) + I2(g) <---> HI(g) with an equilibrium constant of 46.3 and a reaction quotient of 525. Which
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Answer:

The equilibrium will shift to the left to favor the reactants.

Explanation:

Remember that the reaction quotient (Qc) is derived from initial concentrations of reactants and products. Since Qc is greater than Kc, this means that initial concentrations are heavily impacted by a high product concentration ([HI]). Therefore, the reverse reaction will occur and actually create more reactants again ([H2] and [I2]). Thus, the answer is that the equilibrium will shift to the left side to favor the reactants.

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A certain liquid X has a normal boiling point of 133.60°C and a boiling point elevation constant Kb= 2.46°C kg mol^-1.Calculate
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Answer:

136.63 °C

Explanation:

ΔTb=Tb solution - Tb pure

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molality = 0.431 moles/350 * 10^-3 = 1.23 molal

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Tb solution = 136.63 °C

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