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vekshin1
3 years ago
6

The mass number of this atom is_________​

Chemistry
1 answer:
galben [10]3 years ago
3 0

Answer:

7

Explanation:

The mass number is neutrons plus protons

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How much heat is lost when 0.440 mol of steam condenses at 100 °C?
dusya [7]

Answer:

17,890 J

Explanation:

The amount of heat released by a gaseous substance when it condenses is given by the formula

Q=n\lambda_v

where

n is the number of moles of the substance

\lambda_v is the latent heat of vaporization

The formula can be applied if the substance is at its vaporization temperature.

In this problem, we have:

n = 0.440 mol is the number of moles of steam

\lambda_v=40,660 J/mol is the latent heat of vaporization of water

And the steam is already at 100C, so we can apply the formula:

Q=(0.440)(40660)=17,890 J

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4 years ago
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Gre4nikov [31]

Answer:

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Explanation:

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2 years ago
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