Author: Anonymous

A gas-filled balloon has an initial volume of 3.53 L at 2.30 atm and 61°C.  What is the final volume (in L) of the balloon if the pressure and temperature are adjusted to 76.3 kPa and 8°C? Show all work, and highlight your answer in a readable background color.

The combustion of liquid carbon disulfide produces carbon dioxide gas and sulfur dioxide gas.  What volume (in L) of sulfur dioxide gas is produced along with 83.1 kJ of heat under standard thermochemical conditions?  Assume 100% yield. Show all work, using dimensional analysis wherever possible, and highlight your final answer in a readable background color.

At a particular temperature and pressure, the effusion rate of HCl gas is 813 particles per minute.  What is the effusion rate of steam at that same temperature and pressure?

Which of the following is most likely to be insoluble in water?

[EXTRA CREDIT] (3 pts possible, question will show as being out of 0 pts) Given the following data: Ca(s) +   O2(g)   —>   CaO(s)                            

The pressure of a gas sample is measured with a closed-ended manometer containing mercury, as shown in the figure below.  What is the pressure of the gas sample, in torr?

Which statement below best explains why Ernest Rutherford was expecting the alpha particles to pass through the gold foil undeflected?

A gas sample at STP occupies a volume of 81.36 L.  What volume will the same gas sample occupy if the temperature is changed to 86°C?  Assume the pressure remains constant.

Given the following information, calculate

150.0 grams of solid potassium chlorate decomposes to produce solid potassium chloride and oxygen gas. Show all work for every part of this problem, including dimensional analysis, sig figs and units!  Highlight your answer in a readable background color.   A.  (2 pts)  Write the balanced molecular equation, including states of matter. B. (5 pts)  Calculate the mass (in g) of potassium chloride that is produced.  Assume 100% yield. C.  (5 pts)  What volume (in L) of oxygen gas is produced, if the gas is at 37°C and 1430 torr?  Assume 100% yield. D.  (5 pts)  What mass (in g) of potassium chlorate is needed to generate 8.73 L of oxygen gas at 22°C and 1.56 atm partial pressure?  Assume 100% yield.