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Minchanka [31]
3 years ago
15

0.0145 moles of helium gas are introduced into a balloon so that the volume of the balloon is 2.54 liters. An additional amount

of helium is added to the balloon so that the total amount of helium is 0.0253 moles. Calculate the final volume of the balloon.
Chemistry
1 answer:
olga_2 [115]3 years ago
6 0

Answer:

4.43L is final volume of the ballon

Explanation:

Avogadro's law of ideal gases states that <em>equal volumes of gases, at the same temperature and pressure, have the same number of molecules</em>.

The formula is:

\frac{V_1}{n_1} =\frac{V_2}{n_2}

Where V and n are volume and moles of the gas in initial and final conditions.

If the initial conditions are 0.0145 moles and 2.54L and final amount of moles is 0.0253moles, final volume is:

\frac{2.54L}{0.0145mol} =\frac{V_2}{0.0253mol}

V₂ = <em>4.43L is final volume of the ballon</em>

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Explanation:

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Otherwise If we want to justify Johan statement we need to look at the '' serving size '' ⇒

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Working with the information of the food label A we can write the following expression :

\frac{1Cup}{160calories}=\frac{\frac{1}{4}Cup}{x}  ⇒ Looking at the value of ''x'' ⇒

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x=40calories

If we look at the same amount of portion volume :

In \frac{1}{4} cup of food A we have 40 calories

In \frac{1}{4} cup of food B we have 50 calories

We could conclude that Food B has more calories.

That's how both claims could both be justified.

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4 years ago
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Answer:

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