Question

DISCUSSION QUESTIONS 1. If the liquid did not completely vaporize in the experiment, would the ap- parent molecular weight be larger, smaller, or unchanged compared to that determined if the experiment had been properly performed? Would the error in part (1) have a larger, smaller, or the same effect as the errors that might be made in measuring the temperature of the water in the flask, the barometric pressure, or the volume of the flask? Explain your answer. 2. What principle or law of nature permits us to calculate the molecular weight of a substance from its vapor density? 3. 4. In 1900, Ramsey and Travers took a sample of air and removed the nitrogen, oxygen, carbon dioxide, and other reactive gases and found that a small amount of gas remained.If the gas had a density of 1.783 g/L at standard temperature and pressure, what was the identity of this gas? Calculate the uncertainty in the molar mass of your unknown. You will receive full credit if your experimental value agrees with the true value within exper- imental error. However, if you calculate the experimental uncertainty incor- rectly, we will use a different set of standards. 5.