Allowable Concentration Of Vinyl Chloride In A Chemical's Plant Atmosphere

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Allowable Concentration Of Vinyl Chloride In A Chemical's Plant Atmosphere

The concentration of vinyl chloride (C_{2}H_{3}Cl) allowed in the atmosphere in a chemical plant is 2.0 x 10^{-6} g/L.

(a) Express the concentration in moles/Liter

(b) Express the concentration in molecules/Liter.

**The strings**:
S_{7}P_{1}A_{15} (containership - mass).
**The math**:

Pj Problem of Interest is of type *containership* (mas).

**(a)**The molar mass of a substance (the mass of 1 mole) equals the formula weight of the substance expressed in grams.

Formula weight of vinyl chloride (C_{2}H_{3}Cl) = 24 + 3 + 35.45 = 62.45 g

So, 2.0 x 10^{-6} g = (2.0 x 10^{-6})/62.45 moles = 3.2 x 10^{-8} moles

So, concentration of vinyl chloride in moles = 3.2 x 10^{-8} moles/L.
**(b)** 1 mole of a substance contains the Avogadro's number of molecules = 6.02 x 10^{23}.

So, 3.2 x 10^{-8} moles contains:

(3.2 x 10^{-8})(6.02 x 10^{23}) molecules = 1.9 x 10^{16} molecules.

So, concentration vinyl chloride in molecules = 1.9 x 10^{16} molecules/L.

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