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Leto [7]
3 years ago
13

How many electron energy shells are occupied in an unstable atom of silicon

Chemistry
1 answer:
drek231 [11]3 years ago
8 0

Answer:

4

Explanation:

it will share its valence electrons with other elements to acquire noble gas confriguration of the nearest inert element.

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Calculate the number of kilojoules to warm 125 g of iron from 23.5 °C to 78.0 °C.
insens350 [35]
Given:
Iron, 125 grams T
1 = 23.5 degrees Celsius, T2 = 78 degrees Celsius.  

Required:
Heat produced in kilojoules  

Solution:
The molar mass of iron is 55.8 grams per mole. SO we need to change the given mass of iron into moles.  
 
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<span>
Q (heat) = nRT = nR(T2 = T1)</span>
Q (heat) = 2.24 moles (8.314 Joules per mol degrees Celsius) (78.0 degrees Celsius – 23.5 degrees Celsius)
<u>Q (heat) = 1014.97 Joules or 1.015 kilojoules</u> <span>This is the amount of heat produced in warming 125 g f iron.</span>
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If an object is moving right at 10 N and a force is applied from the left at 8N, what is the net force on the object?
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5 0
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Can anyone help me with Science Grade 6 questions , soon as possible?
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