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Softa [21]
2 years ago
10

Changes in temperature can often cause a change in the state of matter of objects. A decreasein temperature causes which of the

following to happen?
A liquids will boil. B Water will freeze. C Wax will melt. D Solids will turn to gas.
PLS give meh answer
Chemistry
1 answer:
STALIN [3.7K]2 years ago
5 0

Answer:

B. Water will freeze

<em>because</em><em> </em><em>the</em><em> </em><em>latent</em><em> </em><em>heat</em><em> </em><em>of</em><em> </em><em>vapourization</em><em> </em><em>decreases</em><em>.</em>

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N=14g
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So one mole of NH3 is 17 grams, you can divide 82.9 grams by 17 grams to find the number of molecules. The answer should be 4.876 moles (molecules) of ammonia. Hope this helps!
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3 years ago
Assuming you have 6.24 x 1014 electrons and the surface area of the pail is 0.2 m2, what is the charge density (C/m2)?
pentagon [3]

Answer:

σ = 4.998 E-4 C/m²

Explanation:

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⇒ Q = (6.24 E14 elect)/( 1 C /6.241509 E18 elect) = 9.998 E-5 C

charge density (σ):

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∴ surface area (S) = 0.2 m²

⇒ σ = ( 9.998 E-5 C ) / ( 0.2 m²)

⇒ σ = 4.998 E-4 C/m²

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3 years ago
How many moles of ammonia (nh3 will be produced from 4.0 moles of nitrogen (n2?
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