[40 points]

- which of the following statements is false? an increase in temperature will
a. increase the molecular weight of the gas.
b. increase the velocity of the gas molecules.
c. increase the number of collisions per second.
d. increase the average kinetic energy of the molecules.
e. increase the root-mean-square velocity of the molecules.

- what is the order of increasing rate of effusion for the following gases? ar, co2, he, n2

math/short answer

- place the following gases in order of increasing speed at the same temperature. n2, h2, cl2, co2, ar

the one that is wrong is a. increase the molecular weight of the gas , the molecular weight never changes when a solid turns to a liquid or when a liquid turns to a gas .

a) the particles of the chair are strongly held together.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).