9 Determination of Gas Constant - Faculty.chemeketa.edu

LAB 9: THE GAS CONSTANT:RELATED EXERCISES:NAME_____________1.___ What would be the effect on the calculated value of R if in your experiment the stopper were notquickly inserted after putting the Al into the acid?A. The calculated value of R would be too high.B. The calculated value of R would be too low.C. The speed at which the flask was stoppered makes no difference in the calculated value of R.2.___ What would be the effect on the calculated value of R if you had forgotten to account for thevapor pressure of water in the gas mixture of your experiment?A. The calculated value of R would be too high.B. The calculated value of R would be too low.C. The vapor pressure of water makes no difference in the calculated value of R.3. A student, Kim Estry, found a value of R = 0.0821 L atm / mol K using the procedures in thislaboratory exercise. The barometric pressure (P tot ) was 760.0 torr, the temperature (T) was 298 K,and the amount of gas collected (V) was 25.6 mL.A. What is the partial pressure (P H2 ) of the hydrogen obtained in Kim’s experiment? Showcalculations. Keep appropriate # of significant figures. Record answers in the boxes provided.P =P =torratmB. How many moles of hydrogen gas did Kim produce? Show calculations. Keep appropriate # ofsignificant figures. Record answer in the box provided.n=C. Determine how many grams of Al that Kim started with? Show calculations. Keep appropriate # ofsignificant figures. Record answer in the box provided.g Al =124CH104 Lab 9: The Gas Constant (F14)