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Ilya [14]
1 year ago
10

What is the energy change when 78.0 g of Hg melt at −38.8°C

Chemistry
1 answer:
adell [148]1 year ago
5 0

Answer:

The correct answer is - 2.557 KJ

Explanation:

In this case, Hg is melting, the process is endothermic, so the energy change will have a positive sign.

we can calculate this energy by the following formula:

Q = met

where, m = mass,

e = specific heat

t = temperature

then,

Q = 78*0.14* (273-38.8)

here 0.14 = C(Hg)

= 2.557 Kj

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Explanation:

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3 0
2 years ago
A canister has a fixed volume. If the pressure of the cannister is 1.5 atm at 25 Celsius, what is the new pressure if the temper
scoray [572]

Answer:

<u>d) 1.8 atm</u>

Explanation:

<u>According to Boyle's Law,</u>

  • P₁/T₁ = P₂/T₂

Here, we are given :

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<u />

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3 0
1 year ago
What kingdom do each of the following organisms belong to? *
siniylev [52]

Answer:

i think third option is correct.

5 0
2 years ago
Choose the catabolic reaction.
olga55 [171]

Answer:

B. Synthesizing a complex molecule

Explanation:

Hello!

In this case, since catabolic reactions are related to the synthesis of complex biomolecules and metabolic reactions to the breaking down of complex molecules to obtain energy from (say start), we infer that the appropriate answer is:

B. Synthesizing a complex molecule

Because regardless C. also mentions the synthesis of a compound, carbonic acid is not a complex one in comparison to the biomolecules we produce during our cellular cycles.

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7 0
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Answer:

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Explanation:

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