Calculate the number of moles and molecules present in the following: (i) 0.04g of methane
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Answer:
Number of moles = 0.0025 moles
Number of molecules = 0.015 * 10²³ molecules
Explanation:
We know that,
Number of moles =
Number of moles =
Given that,
Given mass = 0.04g
Molar mass of CH₄ = 12 + 4 = 16g
Avogadro Number = 6.022 * 10²³
Substituting these values we get,
Number of moles =
Substituting the value of number of moles and avogadro number we get,
0.0025 =
Number of molecules = 0.0025 * 6.022 * 10²³
Number of molecules = 0.015 * 10²³
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