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The given number of molecules is half of Avogadro's Number, which is defined as the number of molecules in one mole. Therefore, the given number of molecules is one-half of a mole. More exactly, 3.01/6.022 = 0.4998, but since the given number of significant digits is three in 3.01, this value rounds to 0.500. Therefore, the answer can be expressed as 0.500 moles.

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13y ago
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11y ago

If you are given the number of representative particles of a substance, and you need the number of moles of that substance, you must divide by Avogadro's constant, which is 6.02x1023. So: 3.75x1024/6.02x1023=0.623x101=6.23 moles.

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14y ago

Since a mole is 6.022x10-23 elementary entities, then I'd say to divide 3.754x10-23 by 6.022x10-23, resulting in 0.6233 moles of ethane.

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13y ago

3.4 X 10^23/6.022 X 10^23

= 0.56 moles

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9y ago

One mole has 6.022x10^23 atoms.So 0.5 mol has haif of it 3.011X10^23

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11y ago

0.5 mole CO2

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Yasir Khan

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1y ago
Why

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12y ago

b. 6.23 mol carbon dioxide

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12y ago

b. 6.23 mol carbon dioxide.

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Q: How many moles are in 3.75x1024 molecules co2?
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How many moles does a sample of CO2 that contains 8.16x1022 O atoms?

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We know for every 6.022 x 10^23 molecules, we have a mole of a substance, right? So if we have 3920molecules, we can use the above conversion factor to get: 3920 molecules CO2 x (1mol CO2/(6.022x10^23molecules CO2)) = 6.51 x 10^-21 moles CO2. There are three significant figures in this problem, from the 3929 molecules.


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