mass question?

so confused on this:

A Freon leak in the air conditioning system of an older car releases 30g of CF2Cl2 per month.

What mass of chlorine is emitted into the atmosphere each year by this car?

2 Answers

  • CF2Cl2 mol mass = (12 + 38) + 71 = 121g/mol.

    Cl2 = 71/121= 0.5868 x 100% = 58.68% Chlorine.

    30g x 0.5868 = 17.6g Chlorine per month.

    17.6g x 12mo./yr = 211 g/yr of Chlorine to the atmosphee.

  • 30g CF2Cl2 / 120.913 g/mol CF2Cl2 = 0.248 mol / month

    70.906 g/mol Cl2 * 0.248 mol/month CF2Cl2 = 17.59 g Cl2/month

    17.59 g * 12 months = 211.11 g Cl2 per year

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