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enot [183]
2 years ago
5

The weight for this compound is 74. what is the molecular formula​

Chemistry
1 answer:
Evgen [1.6K]2 years ago
3 0

Explanation:

ur question is incomplete what elements make the compound and we talk of mass not weight and what are the units kjmol ,grams ,kgs

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Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.
marin [14]

Answer:

Q=113,000J

Explanation:

Hello there!

In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:

Q=m*\Delta _{vap}H

Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.

Q=50*2259.36 J/g\\\\Q=113,000J

Which is positive due to the necessity of heat.

Regards!

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3 years ago
A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?
astraxan [27]

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