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omeli [17]
3 years ago
9

What happens during chemical reactions?

Chemistry
2 answers:
san4es73 [151]3 years ago
7 0

Answer:

I'm pretty sure it is A but, sorry if I'm wrong!!!

stiv31 [10]3 years ago
4 0

Answer:

Energy is given off or absorbed.

Explanation:

A P E X

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The average molecular speed in a sample of Ar gas at a certain temperature is 391 m/s. The average molecular speed in a sample o
adoni [48]

Answer:

550 m/s

Explanation:

The average molecular speed (v) is the speed associated with a group of molecules on average. We can calculate it using the following expression.

v = \sqrt{\frac{3 \times R \times T}{M} }

where,

  • R: ideal gas constant
  • T: absolute temperature
  • M: molar mass of the gas

We can use the info of argon to calculate the temperature for both samples.

T = \frac{v^{2} \times M}{3 \times R} = \frac{(391m/s)^{2} \times 39.95g/mol}{3 \times 8.314J/k.mol} = 2.45 \times 10^{5} K

Now, we can use the same expression to find the average molecular speed in a sample of Ne gas.

v = \sqrt{\frac{3 \times R \times T}{M} } = \sqrt{\frac{3 \times (8.314J/k.mol) \times 2.45 \times  10^{5}K }{20.18g/mol} } = 550 m/s

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Determine the amount of both hydrogen and oxygen in a 500mL sample of Water.
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There would be about 1.67 x 10^25 oxygen atoms and about 3.34 x 10^25 hydrogen atoms.
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A codon that stops the synthesis of a protein molecule
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There are 3 STOP codons in the genetic code - UAG, UAA, and UGA. These codons signal the end of the polypeptide chain during translation.

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The point of intercept of the plotted data with temperature axis is:
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Here is the graph, hopefully the next person can get it

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Write the electron configuration for vanadium. (Use superscript and proper formatting for full credit.)
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"Ar 3d3 4s2" is the electronic configuration for Vanadium.

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