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Andrei [34K]
3 years ago
9

The wavelength of a photon that has an energy of 5.25 × 10-19 j is __________ m.

Chemistry
1 answer:
RoseWind [281]3 years ago
4 0
The wavelength of a photon that has an energy of 5.25 × 10⁻⁻¹⁹ J is 3.79 × 10⁵ cm

I attached the working and the answer to both questions below.

Please note that E= Energy  C = speed of light, h = Plank's Constant, λ= wavelength




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How many covalent bonds does carbon form if each of its unpaired electrons participate in one bond?
yulyashka [42]

Four covalent bonds.

<h3>Further explanation</h3>

Covalent (or homopolar) bonds occur based on the use or sharing of electron pairs. Covalent bonds are formed between nonmetallic elements.

We have the electronic configuration of a carbon atom as follows:  

\boxed{ \ _{6}C = 1s^2 \ 2s^2 \ 2p^2 \ or \ [He] \ 2s^2 \ 2p^2 \ }

  • The electronic configuration of carbon is \boxed{ \ 2,4 \ }
  • The electrons are distributed in the 1st and 2nd orbit.  
  • K shell (n = 1) = 2 electrons.
  • L shell (n = 2) = 4 electrons.

From this, we can see that the carbon atom has four unpaired electrons which are in the outer shell, called the valence electron.  

Carbon atoms with four electrons in the outer shell need four more electrons to reach a stable electron configuration such as a noble gas. Therefore, carbon atoms can form four covalent bonds with other non-metal atoms such as hydrogen, oxygen, nitrogen, sulfur, halogens, and even with carbon atoms themselves.

Recall that a carbon atom can form single, double, or triple bonds with other carbon atoms.

<h3>Learn more  </h3>
  1. Flammability as one of the chemical properties brainly.com/question/1767022
  2. About the single bonds in fatty acids brainly.com/question/1386856  
  3. The chemical formula for nitrobenzene brainly.com/question/2861241

Keywords: how many, covalent bonds, carbon, each of its unpaired electrons, participate in one bond, valence, outer shell, orbit, stable, the electronic configuration, non-metal atoms

8 0
3 years ago
How many outer planets are there?
Ivenika [448]

Answer:

four outer planetsThe Outer Planet the four outer planets and the Sun, with sizes to scale. From left to right, the outer planets are Jupiter, Saturn, Uranus, and Neptune. The gas giants are mostly made of hydrogen and helium. These are the same elements that make up most of the Sun.

Explanation:

I hope this helps you

Ari  

mwah


3 0
3 years ago
For the reaction below, identify the excess reactant when 4.35 g of hydrogen reacts with 30.75 g of iodine to produce hydrogen i
kogti [31]

The excess reactant when 4.35 g of hydrogen reacts with 30.75g of hydrogen iodide is  hydrogen

<h3>calculation</h3>

write the equation for the reaction

H2(g) + I2 (g) → 2HI (g)

find the mole of each reactant

moles = mass/molar mass

moles of H2= 4.35 g/2 g/mol=  2.175  moles

moles o I2 = 30.75 g/ 254 g/mo=0.1211 moles

0.1211 moles of I2 reacted with 0.1211 moles of H2 but there are more moles of H2 there Hydrogen was in excess

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4 years ago
Which statement describes a reason scientists predict that carbon dioxide emissions will increase over the next few decades? Cho
Ad libitum [116K]

Answer:

Many countries are undergoing an increase in technology and standard of living.

Explanation:

7 0
3 years ago
El petróleo crudo, es decir, en estado natural,
Yanka [14]
Hey how are you can you help me with my quiz?
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