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maks197457 [2]
3 years ago
10

Work is performed on an object by raising it 2 m above the floor. Which of the

Chemistry
2 answers:
ss7ja [257]3 years ago
8 0
C) mechanical energy
devlian [24]3 years ago
3 0

Answer: Id say C

Explanation:

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muminat

Answer:

enthalpy

Explanation:

If it is used with a triangle in front, (delta H), that means the change in enthalpy. Delta H= (m)(s)(Delta T).  m=mass of products, s=heat of the products, Delta T = change in temperature.

Hope that helps

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True or false, when a material loses thermal energy, it usually contracts.
Brums [2.3K]

Answer:

True

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Whenever something loses thermal energy, it contracts and becomes smaller.

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In an oven, 7000 kg of limestone are heated to over 900ºC to give lime and carbon dioxide. Assuming all calcium carbonate reacts
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3920kg of lime(CaO)   1568m^3 of CO2

Explanation:

I attached the explanation!

also for calculating the volume I assumed Standard Temperature and Pressure(STP).

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C

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<span>In the physical change of matter, there is no new substance that is formed. It is only the appearance of the matter that is being changed and not its chemical composition. Cutting, tearing and grinding are only some of the examples that exhibit physical change. </span></span>

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