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uranmaximum [27]

3 years ago

9

What happens when gasoline is used to power a vehicle?

1 answer:

Romashka [77]3 years ago

3 0

The answer should be A. Because the energy in gasoline is called chemical. When burned it is heat, Then to power a vehicle, it is mechanical energy. But I don't know whether the question wants to mean that the energy in the gasoline will not convert totally to the heat, so it will lose. But if think like this, when heat energy transform to mechanical, it will lose again. So I think the answer is A.

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Answer:

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b) $2.5\times 10^3$ moles of bricks have a mass equal to the mass of the Earth.

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b)

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Mass of 1 mole of brick = m= $2.4\times 10^{24} kg$

Let the moles of brick with equal mass of the Earth be x.

$m\times x=M$

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