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spin [16.1K]
3 years ago
11

What amount of heat is required to raise the temperature of 350 grams of copper to cause a 25°C change? The specific heat of cop

per is 0.39 J/g°C.. . A. 2500 joules. B. 2600 joules. C. 3400 joules. D. 3900 joules.
Chemistry
2 answers:
jarptica [38.1K]3 years ago
4 0
The heat required to raise the temperature to a specific temperature change of a sample is related to the specific heat capacity of the substance.  In this case, the heat can be calculated through mCpΔT = 350 g * 0.39 J/g C *25 C. This is equal to 3412. 5 Joules. Closest answer is C.
Gnesinka [82]3 years ago
4 0

Answer   c

Explanation: Because I said don't doubt the all knowing

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7 0
3 years ago
To interconvert the concentration units molality (m) and mass percent, you must also know the density of the solution. A) True B
uranmaximum [27]

Answer:

The correct answer is option false.

Explanation:

Molality of the solution defined as moles of substance present in 1 kilogram of   solvent.

Moles = \frac{Mass of solute}}{\text{molar mass of solute}}

Molality=\frac{Moles}{\text{Mass of solvent(kg)}}

Mass of percent (w/w%) of the solution is defined as amount of solute present in 100 grams of solution.

(w/w\%)_=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100

So, if want to inter-convert molality into mass percent we can do that without knowing density of solution.

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3 years ago
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Mrrafil [7]

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8 0
2 years ago
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How can you estimate the pH range of an indicator’s color change? Why do some indicators have two separate pH ranges?
erastova [34]

The color change of a pH indicator is caused by the dissociation of the H+ ion from the indicator.

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4 0
1 year ago
1) A block of aluminum has a mass of 40.5
-Dominant- [34]

Answer:

15 ml

Explanation:

\frac{40,5}{y}=\frac{2,7}{1}

2,7y=40,5

y=40,5/2,7=405/27= 15ml

7 0
3 years ago
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