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True [87]
3 years ago
10

PLEASE HELP

Chemistry
2 answers:
blondinia [14]3 years ago
7 0

Answer:

c elevation

Explanation:

svet-max [94.6K]3 years ago
6 0

C is the answer for your question

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How much heat must be removed from 456 g of water at 25.0°c to change it into ice at?
N76 [4]
This question can be simply solved by using heat formula,
    Q = mCΔT

Q = heat energy (J)
m = Mass (kg)
C = Specific heat capacity (J / kg K)
ΔT = Temperature change (K)

when water freezes, it produces ice at 0°C (273 K)
hence the temperature change is 25 K (298 K - 273 K)
C for water is 4186 J / kg K or 4.186 J / g K
By applying the equation,
 Q = 456 g x 4.186 J / g K x 25 K
     = 47720.4 J
     = 47.72 kJ

hence 47.72 kJ of heat energy should be removed.
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3 years ago
Which scientist explained why binary stars change colors
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Answer:

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Explanation:

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3 years ago
Base A dissociates 25% in water. Base B dissociates 50%. Base C dissociates
torisob [31]

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Given that

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We can conclude that  Base A is the weakest conductor oelectricity since it has the lowest percentage of dissociation.

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Acetone, the solvent in nail polish remover, has a density of 0.761 g/ml What is the volume of 25.0g of acetone
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