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neonofarm [45]
2 years ago
14

8.

Chemistry
1 answer:
Dima020 [189]2 years ago
5 0
The correct answer is b hope this helps air
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A gas at 300 k and 4.0 atm is moved to a new loacation with a temperature of 250 k. The volume changes from 5.5 L to 2.0 L. What
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Answer is: <span>the pressure of the gas is 9,2 atm.
</span>p₁ = 4,0 atm.
T₁ = 300 K.
V₁ = 5,5 L.
p₂ = ?
T₂ = 250 K.
V₂ = 2,0 L.
Use combined gas law - the volume of amount of gas is proportional to the ratio of its Kelvin temperature and its pressure.<span> 
</span>p₁V₁/T₁ = p₂V₂/T₂.
4 atm · 5,5 L ÷ 300 K  = p₂ · 2,0 L ÷ 250 K.
0,0733 = 0,008p₂.
p₂ = 9,2 atm.

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3 years ago
How many electrons can occupy an orbital
8_murik_8 [283]

Answer:

2 electrons

Explanation:

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2 years ago
Chemists use the periodic table to organize the elements. What are some ways in which this organization is useful? Select all th
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Where do producers get matter and energy to live and grow ?
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Add electron dots and charges as necessary to show the reaction of calcium and oxygen to form an ionic compound.
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The two atoms shown in the equation are CALCIUM and oxygen. 

<span>You start off with a neutral calcium atom with a shell of two electrons, a shell of 8 around that, a shell of 8 around that, and a shell containing 2...with no charge. </span>
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<span>You also have an oxygen atom with a shell of 2, and a shell of 6...with no charge. </span>
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<span>Each ionizes to form a calcium ion with 2 electrons removed (from the outer shell), leaving a +2 charge (20 protons, 18 electrons)... </span>
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<span>Their electrostatic attraction causes them to come together to form an ionic compound of CaO in a crystal lattice.</span>
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