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andrew11 [14]
3 years ago
12

calculate the frequency in hertz of electromagnetic radiation that has a wavelength of 720.0 nm. (c= 3.00 X 10^8 m/s)

Chemistry
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

f=216s^{-1}=216Hz

Explanation:

Hello.

In this case, the relationship between wavelength, speed of light and frequency is:

\lambda=\frac{c }{f}

It means that solving for the frequency, we obtain:

f=c*\lambda

Thus, for the given 720-nm wavelength and the speed of light, the frequency is:

f=3.00x10^8\frac{m}{s}*720.0nm*\frac{1x10^{-9}m}{1nm}\\  \\f=216s^{-1}=216Hz

Best regards.

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Write the balanced chemical equation between H2SO4H2SO4 and KOHKOH in aqueous solution. This is called a neutralization reaction
const2013 [10]

Answer:

0.185M sulfuric acid

Explanation:

Based on the reaction:

H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O

<em>1 mole of sulfuric acid reacts with 2 moles of KOH</em>

Initial moles of H₂SO₄ and KOH are:

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The moles of sulfuric acis that react with KOH are:

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Thus, moles that remain are:

0.3525moles - 0.0840 moles = <em>0.2685 moles of sulfuric acid remains</em>

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