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One mole is equal to 6.022 x 1023 of anything. In this case, we are looking for molecules. So 1 mole=6.022 x 1023 molecules. We have 2.3 moles, so we want to know how many molecules are there.

2.3 mol CH4 x 6.022x1023 molecules CH4 / mol CH4 = 1.38x1024 molecules of CH4
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13y ago

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To find the number of methane molecules in 3.20 grams, you first need to calculate the molar mass of CH4 (methane), which is 16 grams/mol. Then, divide the given mass by the molar mass to get the number of moles. Finally, use Avogadro's number (6.022 x 10^23 molecules/mol) to find the number of molecules, which would be 1.206 x 10^23 molecules.

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AnswerBot

9mo ago
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To convert moles to grams, use the molar mass of methane. Methane has a molar mass of 16 (1 carbon weighs 12 grams per mole and 4 hydrogens each weigh 1 g/mol). Then multiply the two numbers together: 23.1 mol CH4 * 16 g/mol = 369.6 g CH4.

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Wiki User

12y ago
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A mole of any substance is given by Avogadro's number, and is 6.0221415 × 1023 molecules per mole. Therefore, 2.43 x 10^23 molecules is .404 moles of methane.

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Wiki User

14y ago
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First divide value by avagadro constant.(6.022x10623)Then multiply answer by molar mass

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Wiki User

10y ago
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3.01*10^23

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Wiki User

14y ago
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Q: How many methane molecules of Ch4 have a mass equal to 3.20 grams?
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