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max2010maxim [7]
3 years ago
8

A sample of co2 gas at 22 degrees celsius and 1 atm has a volume of 2.00 l. determine the ratio of the original volume to the fi

nal volume when
Chemistry
1 answer:
REY [17]3 years ago
6 0
Need to know the variable. What changed, the amount of CO2, temp or pressure?
Incomplete question.
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The isotopes K-37 and K-42 have the same
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the same number of protons

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The number 40 in the name calcium-40 represents
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A. the atomic number

Explanation:

It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth.

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True Or False, Humanists felt strongly against comparing people to animals.
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A gas mixture with a total pressure of 765 mmHg contains each of the following gases at the indicated partial pressures: 134 mmH
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4 years ago
22. A piece of wood board contains approximately 6.76 X 1023 molecules of wood, C2H4920, how
Licemer1 [7]

Answer:

<h2>1.23 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{6.76 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{6.76}{6.02}  \\  = 1.22923...

We have the final answer as

<h3>1.23 moles</h3>

Hope this helps you

5 0
3 years ago
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