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Andrei [34K]
3 years ago
7

What is the partial pressure of oxygen in a gas mixture that is 40% oxygen, 40% argon, and 20% helim?

Chemistry
1 answer:
Scrat [10]3 years ago
4 0
The answer is 400 mm Hg. 

Hope this helps! 
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2
timofeeve [1]

Answer:

B. The Shell

Explanation:

The shell covers and surrounds whats inside. It protects it!

4 0
3 years ago
Read 2 more answers
Which quantum number distinguishes the different shapes of the orbitals?
UkoKoshka [18]
The four quantum numbers are:
principle quantum number: this number describes the energy of orbitals. It describes the most probable distance between the electron and the nucleus.
angular quantum number: this number describes the shape of orbitals, and thus, describes the angular distribution.
magnetic quantum number: this number describes the number of orbitals and how they are oriented within the subshell
spin quantum number: this number determines the direction of the spin of the electron.

Based on the above, the quantum number that distinguishes the different shapes of the orbitals is the angular quantum number
7 0
3 years ago
In order to prepare a 0.523 m aqueous solution of potassium iodide, how many grams of potassium iodide must be added to 2.00kg o
Lerok [7]
M = amount of the solute  / mass of the <span>solvent

0.523 = x / 2.00 

x = 0.523 * 2.00

x = 1,046  moles

molar mass KI = </span><span>166.0028 g/mol
</span><span>
Mass = 1,046 * 166.0028

Mass </span>≈<span> 173.63 g

hope this helps!

</span>
6 0
3 years ago
Which statement correctly describes a sample of gas confined in a sealed container? (1) It always has a definite volume, and it
Luda [366]
A gas does not have a specific shape or volume (so we reject option A), instead it adjusts itself to the container (which is further influenced by other forces such as gravity and temperature) and it with time, willl fill the whole container evenly, so the correct answer is:
(2) It takes the shape and the volume of any container in which it is confined
5 0
2 years ago
Calculate the frequency of blue light of wavelength 4.5x10^2 nm
insens350 [35]
I did the math and i got 450 but i dont know if its right

7 0
3 years ago
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