3 years ago

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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adoni [48]

Answer:

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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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alina1380 [7]

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