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Leno4ka [110]
3 years ago
8

(a) What is the frequency of light of 405 nm wavelength?​

Chemistry
1 answer:
slega [8]3 years ago
6 0

 f = 7.4 x 10²⁰s⁻¹

Explanation:

Given parameters:

wavelength of light = 405 x 10⁻⁹m or 405nm

Unknown:

Frequency of light = ?

Solution:

We can solve this problem using the wave equation:

                  V = f∧

where V is the velocity of light = 3 x 10⁸m/s

           f is the unknown frequency

           ∧ is the wavelength of light

          making f the subject:

                   f = \frac{V}{wavelength} = \frac{3 x 10[tex]^{8}}{405 x 10^{-9}}[/tex]

                   f = 7.4 x 10²⁰s⁻¹

Learn more:

wavelength brainly.com/question/6352445

#learnwithBrainly

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The volume (in mL) of methylergonovine the nurse should draw up in the syringeis is 0.25 mL

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the concept of density, we can obtain the volume of methylergonovine. Details below

<h3>How to determine the volume </h3>

The following data were obtained from the question:

  • Mass of methylergonovine = 0.2 mg
  • Density of methylergonovine = 0.8 mg/mL
  • Volume of methylergonovine =?

Density = mass / volume

Cross multiply

Density × volume = mass

Divide both sides by density

Volume = mass / density

Volume = 0.2 / 0.8

Volume of methylergonovine = 0.25 mL

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brainly.com/question/952755

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Use the periodic table to choose the correct name for each of the following substances. Check all tha
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Answer:

phosphorus trichloride

8 0
3 years ago
Which of the following combustion reactions is balanced correctly? A. C4H6 + 5.5O2 4CO2 + 3H2O B. C4H6 + 4O2 4CO2 + 3H2O C. C4H6
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You must verify that the number of atoms of each type is equal on both sides of the chemical equation: same number of C, same number of H and same number of O on both sides.

<span>A. C4H6 + 5.5O2 ---> 4CO2 + 3H2O

element      reactant side      product side

C                4                        4
H                6                        3*2 = 6
O                5.5 * 2 = 11        4*2 + 3 = 11

Then, this equation is balanced.

</span>Do the same with the other equations if you want to verify that they are not balanced.

Answer: option A.
5 0
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What is the relationship between the amount of carbon dioxide and the earths average temperature?
Anit [1.1K]

Answer:

carbon dioxide concentration goes down, temperature goes down. Carbon dioxide goes up temp goes up, carbon dioxide is directly related to temperature by insulating it in the earths atmosphere and if there's less of it then the temp would go down.

Explanation:

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2 years ago
Wavelengths are often represented in nm. What is the diameter of a helium (He) atom in
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Answer:

Diameter He = 0,1 nm.

Explanation:

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⇒ Diameter He = 1.0 E-13 Km * ( 1000 m / Km ) * (  1 E9 nm / m )

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