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8 May, 17:15

How many carbon atoms are present in 0.92 moles of C2H6O

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Answers (2)
  1. 8 May, 17:17
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    First, determine the number of moles of carbon atom in the given quantity of the sample by multiplying the given value by 2.

    n = 2 (0.92 moles) = 1.84 moles

    Then, multiplying the calculated value of moles by the Avogardro's number to solve for the total number of C atoms.

    N = (1.84 moles) (6.022 x 10^23 atoms/mole)

    N = 1.108 x 10^24 atoms
  2. 8 May, 17:43
    0
    We are presented with the molecular formula C₂H₆O. To determine the amount of carbon atoms present, we must first determine how many moles of carbon are present. The question states that there are 0.92 moles of C₂H₆O. However, there are 2 carbon atoms per molecule of this structure, therefore:

    0.92 moles C₂H₆O x 2 moles C/1 mole C₂H₆O = 1.84 moles C

    There are 1.84 moles of carbon atoms per 0.92 moles of C₂H₆O. Now we must determine the total number of carbon atoms present and we can do this using a value called Avogadro's constant. Avogadro's number is the value designating how many atoms or molecules are present in a mole of that substance. The value of this constant is roughly 6.022 x 10²³ atoms/mole. We can calculate the amount of carbon atoms present as follows:

    1.84 moles C x 6.022 x 10²³ atoms/mole = 1.11 x 10²⁴ atoms.

    Therefore, there are roughly 1.11 x 10²⁴ carbon atoms in 0.92 moles of C₂H₆O.
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