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LiRa [457]
3 years ago
7

ipt A wall that was once white is painted black. Which of the following is definitely true of the painted wall? A. Its chemical

properties have changed. B. Its physical properties have changed. C. Both its physical properties and chemical properties have changed. D. None of its characteristic properties have changed.​
Chemistry
2 answers:
Delvig [45]3 years ago
4 0
The answer would be C
Hope this helps
Julli [10]3 years ago
3 0

Answer:

B It's physical properties changed

Explanation:

Because they painted the outside

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<u>Answer:</u> The correct answer is Option b.

<u>Explanation:</u>

To calculate the amount of heat absorbed or released, we use the following equation:

q=mc\Delta T    .....(1)

where, q = amount of heat absorbed or released.

m = mass of the substance

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We are given:

m=30g\\\Delta T=[40-0]^oC=40^oC\\q=?J

Putting values in equation 1, we get:

q=30g\times 4.186J/g^oC\times 40^oC

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  • <u>For trial 2:</u>

We are given:

m=40g\\\Delta T=[40-30]^oC=10^oC\\q=?J

Putting values in equation 1, we get:

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