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leonid [27]
3 years ago
11

How do lewis dot structures help students visualize electron bonding arrangements?

Chemistry
1 answer:
gulaghasi [49]3 years ago
6 0

The dots in the Lewis structure represents the valence electron of the atom/molecule. The valence electrons surrounds the atom/molecule. The rest all bonds are represented by line be it single, double or triple bond.

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According to the nebular theory what are asteroids and comets
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Asteroids are made up of metals and rocky material , while comets are made up of ice ,dust and rocky material.   
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How much energy is needed to change 44 grams of ice at -8° to steam at 107°?
Tpy6a [65]
Q=m(c∆t +heat of fusion + heat of evaporation)

m= 44g
c= 4.186 J/g.C
∆t= 107-(-8) =115 C
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Q=44(4.186*115 + 333.55 + 2260)
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What is the pressure in a 245 L tank that contains 5.21 kg of helium at 27 Celsius ​
Kitty [74]
<h2><u>Answer:</u></h2>

(These are not rounded to the correct decimal)

130.94 atm

13,266.6 kPa

99,571.4 mmHg

<h2><u>Explanation:</u></h2>

<u></u>

PV = nRT

V = 245L

P = ?

R = 0.08206 (atm) , 8.314 (kPa) , 62.4 (mmHg)

T = 273.15 + 27 = 300.15K

n = 1302.5 moles

How I found (n).

5.21kg x 1000g/1kg x 1 mole/4.0g = 1302.5 moles

Now, plug all the numbers into the equation.

Pressure in atm = (1302.5)(0.08206)(300.15) / 245 = 130.94 atm (not rounded to the correct decimal)

Pressure in kPa = (1302.5)(8.314)(300.15) / 245 = 13,266.6 kPa (not rounded to the correct decimal)

Pressure in mmHg = (1302.5)(62.4)(300.15) / 245 = 99,571.4 mmHg (not rounded to the correct decimal)

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two samples of water, 10 grams and 50 grams are in sperate cups which of the following properties is different for the two boili
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Answer:

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  • The boiling point and density are intensive properties and do not depend on the amount of matter present.
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7 0
3 years ago
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Describe a process that may have produced the moon
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The Giant-Impact theory. People basically believed that the moon was created from the collision between earth and another small planet:)
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