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Anna [14]
3 years ago
8

Hydrogen gas has a density of 0.090 g/L, and at normal pressure and -1.72 °C one mole of it takes up 22.4 L.

Chemistry
1 answer:
aivan3 [116]3 years ago
6 0

<u>Answer:</u> The number of moles of given amount of hydrogen gas is x=\frac{900.0g}{2g/mol}

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We are given:

Let the number of moles of hydrogen gas be 'x'

Given mass of hydrogen gas = 900.0 g

Molar mass of hydrogen gas = 2 g/mol

Putting values in above equation, we get:

x=\frac{900.0g}{2g/mol}=450mol

Hence, the number of moles of given amount of hydrogen gas is x=\frac{900.0g}{2g/mol}

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How many moles are in 4177g of aluminum chloride
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The mole<span> is the </span>unit of measurement<span> in the </span>International System of Units<span> (SI) for </span>amount of substance<span>. It is defined as the </span>amount<span> of a </span>chemical substance<span> that contains as many representative particles, e.g., </span>atoms<span>, </span>molecules<span>, </span>ions<span>, </span>electrons<span>, or </span>photons<span>, as there are atoms in 12 </span>grams<span> of </span>carbon-12<span> (</span>12<span>C), the </span>isotope<span> of </span>carbon<span> with </span>relative atomic mass<span> 12 by definition. 
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Which of the following are characteristics of a gas? (Select all that apply.)
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Which is true of electric cars?
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λmax for the π → π* transition in ethylene is 170 nm. Is the HOMO-LUMO energy difference in ethylene greater than or less than t
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the HOMO-LUMO energy difference in ethylene is greater than that of cis,trans−1,3−cyclooctadiene

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The λmax is the wavelength of maximum absorption. We could use it to calculate the HOMO-LUMO energy difference as follows:

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