A space vehicle of internal volume 3.0 m3 is struck by a meteor and a hole of radius 0.10 mm is formed. If the oxygen pressure within the vehicle is initially 80 kPa and its temperature 298 K, how long will the pressure take to fall to 70 kPa assuming that the temperature is held constant ?

A piece of metal weighing 0.713 g was placed in an eudiometer containing aqueous HCI. After the metal fully dissolved ,23.5 mL of hydrogen gas was collected by displacement of water and a 400 mm column of water was observed. The water temperature was 25 degrees Celcius and the barometric pressure was 758.8 mm Hg ( torr). Refer to the introduction and data sheet to solve the following problems. Calculate the pressure of the hydrogen gas above the water in the column. Calculate the volume occupied by the hydrogen gas at STP.How many equivalent weights (#ew) of the metal were consumed in the reaction? What is the equivalent weight of the metal?

The diameter of a Ne atom is 140 pm. What is the mean free path in nm of 0.5 mol Ne confined in 5 L at 300 K and 9.87 x 104 Pa?

The diagram below shows some isotherms of water. (a) S Estimate values for the critical constants and the van der Waals constants a and b for this gas. (b) Using the information from part (a), estimate the radius of a water molecule. Compare to the value of 1.37 A obtained from interpolation of ionic radii (Y. Zhang and Z. Xu, American Mineralogist 80 (1995) 670-675). PIMPa C 8 15- 10- M 50 400°C 374°C 350°C 300°C 425°C 450°C 275°C 100 150 200 250 300 350 Vicm mole 400 500