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6. {THROWBACK!!) A sample of CO2 gas has a volume of 145 Lat STP. How many grams of CO2 are in this sample?

Respuesta :

Answer:

                     284.88 grams of CO

Explanation:

Data Given:

                  Volume  =  V  =  145 L

                  Standard Temperature  =  T  =  273.15 K

                  Standard Pressure  =  P  =  1 atm

                  Universal Gas Constant  =  R  =  0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹

                  Moles  =  n  =  ??

Formula Used:

                         Assuming that the CO₂ gas is acting ideally we will apply Ideal Gas equation;

                                P V  =  n R T

Solving for n,

                               n  =  P V / R T

Putting values,

                n  =  1 atm × 145 L / 0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹ × 273.15 K

                n  =  6.47 mol

Secondly, Moles are converted to Mass as;

Moles  =  Mass / M.Mass

Solving for Mass,

Mass  =  Moles × M.Mass

Mass  =  6.47 mol × 44.01 g/mol

Mass =  284.88 grams of CO

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