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Firdavs [7]
2 years ago
5

Write the symbol for every chemical element that has atomic number greater than 55 and less than 140.8 u

Chemistry
1 answer:
patriot [66]2 years ago
8 0
Answer on the picture

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Faster molecules have fewer collisions than slower molecules is True about molecular speed.

<h3>What is Molecular speed?</h3>

Molecular speed refers to the average distance gases or molecules travelled atca particular time rate.

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Average molecular speed = Square root (3 (ideal gas constant) * (Temperature)/m)

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Hydrogen peroxide can decompose to water and oxygen by the following reaction
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To begin calculating, there is one thing you need to remember :1 mole of H2O2=34.0148 g
Then we have 5.00g of H2O2=5/34.0148=0.146995
As you know decomposition of 2moles now has prodused <span>196kj
So, </span><span>q is made due </span>0.146995 moles of H2O2=(-196/2)*0.146995=-14.40551Kj
I'm sure it will help.
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