The vapor pressure of water at 20.0°C is . If the pressure of a gas collected ov

Question

The vapor pressure of water at 20.0°C is . If the pressure of a gas collected over water was measured to be . What is the pressure of the pure gas? A. 0.619 atm B. 0.0230 atm C. 0.596 atm D. 0.573 atm E. none of the above 6.0L of a gas having pressure of 650mmHg will have a volume of ________ when it's pressure is 1.1atm. A. 4.7L B. 0.010L C. 3.5L The density of CO2 gas at STP is: A. 0.509 g/L B. 986 g/L C. 1.96 g/L 250 ml of O2 is collected over water at 1.20 atm and 50oC. Calculate the volume of O2(dry) at STP. A. 247 mL B. 200 mL C. 228 mL The density of C3H8 gas at STP is: A. 1.96 g/L B. 986 g/L C. 0.509 g/L Please show work if possible. Thank you

Explanation / Answer

A) The vapor pressure of water at 20 oC,

B. 0.0230 atm

B) Volume of gas (V2) = P1V1/P2

                                    = ((650/760) x 6)/1.1

                                    = 4.7 L

A. 4.7 L

C) Density of CO2 at STP = 1 atm x 44 g/mol/0.08205 L.atm/K.mol x 273.15 K = 1.96 g/L

C. 1.96 g/L

D) Volume of dry O2 at STP,

A. 247 ml

E) Density of C3H8 at STP = 1 x 44/0.08205 x 283.15 = 1.96 g/L

A. 1.96 g/L

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