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vitfil [10]
2 years ago
6

A meteorite is

Chemistry
1 answer:
tresset_1 [31]2 years ago
4 0
I believe the answer is A
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B) How many kilojoules of heat will be released by the combustion of 22.52 g of this liquid at
snow_tiger [21]

Answer:

Explanation:

You realize that C2H5OH releases -1277.3kJ/mol. We need to convert this to the amount based on the question. We that 22.52g of C2H5OH = 0.48884 mol.

This means that it will release (-1277.3)(0.48884) = 624.40 KJ of heat will be released. Note the negative sign is not necessary here (I think) because it says how much is released and not the change in heat of the system so it should be positive.

3 0
2 years ago
How many milligrams of a 20mg sample of cesium-137 remain after 60 years
andrey2020 [161]
Cs -137 has a half life of about 30 years. If 60 years pass, there is two half lives passed so 1/2 * 1/2= 1/4. Take 1/4 and multiply it with the mass given:
(1/4)*20mg=5mg left
5 0
3 years ago
A transverse wave that has electrical and
Semenov [28]
Electromagnetic energy would be your answer :)
6 0
2 years ago
URGENT!!!! helppp<br><br> convert 22.63 moles of oxygen to volume
Lunna [17]
I
0.5
I hope this helps
Sorry if I’m wrong
3 0
3 years ago
Which of the following characteristics is NOT associated with El Niño?
Evgesh-ka [11]

Answer:

I think it's Cooler waters rising to the surface of the ocean.

Explanation:

I've heard of all the others happening. :)

3 0
2 years ago
Read 2 more answers
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