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dem82 [27]
2 years ago
14

The water has a mass of 480.0 grams. If you drink 200.0 grams of the water, how many molecules of water remain in the glass?

Chemistry
1 answer:
Ne4ueva [31]2 years ago
8 0

Answer:

55641.656 × 10^23 molecules

Explanation:

Get the molar mass, multiply by amount of stuff, multiply by Avogadros number.

More detail in picture attached.

Hope it helps. Brainliest Appreciated. :)

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Ethanol boils at 78.4 °C with \DeltaΔHvap = 38.6 kJ/mol. A 0.200-mol sample of ethanol is heated from some colder temperature up
NNADVOKAT [17]

Answer:

Q_T=8.77kJ

Explanation:

Hello,

In this case, the total heat is computed via:

Q_T=n*\Delta H_{vap}+1.05 kJ\\

It means, by adding all the involved heat, which simply result:

Q_T=0.200mol*38.6 kJ/mol+1.05 kJ\\Q_T=8.77kJ

Thus, such heat must be provided to the ethanol, that is why it remains positive.

Best regards.

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