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Masja [62]
3 years ago
15

A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should sh

e use?
Chemistry
2 answers:
Gnesinka [82]3 years ago
7 0

Answer:

Hfus

Explanation:

This is correct on edge.

Volgvan3 years ago
4 0
She needs to use the heat of fusion (ΔH(fusion)) and the equation q=mΔH(fusion) or q=nΔH(fusion)  depending on whether or not ΔH(fusion) is given in J/g or J/mol.  The reason why temperature is absent from the equation is that temperature does not change at a phase change, only the enthalpy does.

I hope his helps.  Let me know in the comments if anything is unclear.
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2/10
emmainna [20.7K]

Answer:

pH=2.34

Explanation:

HBr  -> H  + Br

The dissociation it's complete, for that reason the concentration of the products is the same of HBr

[H+]=[Br-]=0.00234 M

pH= - log (0.00234)=2.34

6 0
3 years ago
Which of the following is true of gases?
aniked [119]

Answer:

Answer:  A. Gases are easily compressed because of the low density.

Explanation:

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2 years ago
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Which statement about the periodic table is true?
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Answer

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2 years ago
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Yakvenalex [24]
I think it's false but don't be mad if it's not right
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3 years ago
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The condensed structural formula for 2,2,3-trimethylbutane is _____. ch3c(ch3)2ch(ch3)2 ch3ch2ch(ch3)c(ch3)3 ch3c(ch3)2c(ch3)3 c
Mrac [35]
The chemical structure of 2,2,3-trimethylbutane is shown as attached document. In a condensed structural formula, a branched chain is shown in bracket (). 

So according to the chemical structure, the correct condensed structural formula for this molecule is CH3C(CH3)CH(CH3)2

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3 years ago
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