Identify the calculations possible using only 28.02 g/mol as a conversion factor. Select one or more:

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Identify the calculations possible using only 28.02 g/mol as a conversion factor. Select one or more:

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Doris 4 years 2021-07-26T16:54:37+00:00 1 Answers 429 views 0

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  1. thanhha
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    2021-07-26T16:56:03+00:00
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    The question is incomplete, the complete question is:

    Identify the calculations possible using only 28.02 g/mol as a conversion factor. Select one or more:

    (a): Calculate the grams of N_2 in 10.58 L of nitrogen gas

    (b): Calculate the grams of N_2 in 5.03\times 10^{20} moles of nitrogen gas

    (c): Calculate the moles of N_2 molecules in 3.94 grams of nitrogen gas

    (d): Calculate the moles of N_2 molecules in 4.73 L of nitrogen gas

    Answer: The correct options are (b) and (c).

    Explanation:

    We are given:

    Molar mass of N_2 = 28.02 g/mol

    The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

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

    At STP conditions:

    1 mole of gas occupies 22.4 L of volume

    For the given options:

    (a): Volume is given and to calculate the mass of N_2, we need to use both the conversion factors above.

    The equation formed will be:

    Mass of N_2 = \frac{1mol}{22.4L}\times 10.58L\times 28.02 g/mol

    (b): Moles are given and to calculate the mass of N_2, we need only the first conversion factor.

    The equation formed will be:

    Mass of N_2 = (5.03\times 10^{20}mol)\times 28.02g/mol

    (c): Mass is given and to calculate the moles of N_2 molecules, we need only the first conversion factor.

    The equation formed will be:

    Moles of N_2 molecules = \frac{3.94 g}{28.02g/mol}

    (d): Volume is given and to calculate the moles of N_2 molecules, we need only the second conversion factor.

    The equation formed will be:

    Moles of N_2 molecules = \frac{1mol}{22.4L}\times 4.73L

    Hence, the correct option is (b) and (c)

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