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fomenos
4 years ago
13

A ray of yellow light has a wavelength of about 5.8×10−7 m. Will exposure to yellow light cause electrons to be emitted from ces

ium?
Chemistry
1 answer:
Igoryamba4 years ago
7 0
The threshold frequency of Cesium is 5.2 x 10^14 Hz.

To find the frequency of yellow light, we use the equation:
speed of light = wavelength x frequency
3 x 10^8 = 5.8 x 10^-17 x frequency
frequency = 5.17 x 10^24

This is higher than the threshold frequency of Cesium, thus, electrons will be emitted.

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I’m not sure but i think blue
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3 years ago
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What would be the answer
ser-zykov [4K]

Answer:

4

Explanation:

The balanced equation for the reaction is as follows:

4Al + 3O2 --> 2(Al2O3)

4 0
4 years ago
Classify each of the following as elements (E), compounds (C) or Mixtures (M). Write the letter X if it is none of these. ______
Lana71 [14]

Answer:

Diamond - E

Sugar- C

Milk - M

Iron- E

Air- M

Sulfuric Acid- C

Gasoline - M

Electricity- X

Krypton- E

Bismuth - E

Uranium - E

Kool-Aid -M

Water - C

Alcohol - C

Pail of Garbage - M

Ammonia - C

Salt - C

Energy - X

Gold - E

Wood - M

Bronze - M

Ink - M

Pizza - M

Dry Ice - C

Baking Soda - C

Explanation:

An element is the smallest part of a substance that is capable of independent existence. An element cannot be broken down into any other substance. Krypton, Bismuth etc are all elements.

A compound is a combination of two or more elements which are chemically combined together e.g NH3, CO2 etc.

A mixture is any combination of substances that are not chemically combined together. E.g Pizza, milk etc

5 0
3 years ago
Can someone explain how you get the answers to these questions??<br> i really need help !!!
atroni [7]

The balanced chemical equations are as follows:

  • AlBr₃ + K → 3 KBr + Al
  • FeO + PdF₂ → FeF₂ + PdO
  • P₄ + 6 Br₂ → 4 PBr₃
  • 2 LiCl + Br₂ → 2 LiBr + Cl₂

<h3>What are balanced chemical equations?</h3>

Balanced chemical equations in which the moles of atoms of elements taking part in a reaction are balanced on both sides of the equation.

The balancing of chemical equations follows the law of conservation of mass which states that matter can neither be created nor destroyed.

In balancing of chemical equations, the following steps are follows:

  1. ensure that the all the substances involved are written in the equation
  2. do not alter the formula of compounds or molecules
  3. add numerical coefficients in front of the compounds and molecules to ensure that the moles of atoms of elements are balanced on both sides of the equation

In conclusion, a balanced chemical equation obeys the law of conservation of mass.

Learn more about balancing of chemical equations at: brainly.com/question/17056447

#SPJ1

5 0
2 years ago
If an atom loses two electrons what charge will it have ? <br><br> +2 <br> -1<br> +1<br> -2
Citrus2011 [14]

Answer:

+2

Explanation:

Because an electron has a negative charge.

6 0
4 years ago
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