[1] Graham\'s Law refers to a. Boiling points of gases. b. Gaseous diffusion. c.

Question

[1] Graham's Law refers to a. Boiling points of gases. b. Gaseous diffusion. c. Gas compression problems. d. Volume dependence upon temperature. [2] When 200 mL of gas at constant pressure is heated, its volume a. increases b. decreases c. remains unchanged d. no clue [3] If you wish to find the corrected volume of a gas which was 20 C and 760 mm Hg pressure, the conditions were changed to 0 C and 700 mm Hg pressure, by what fractions would you multiply the original volume? a. (293 x 760)/(273 x 700) b. (273 x 760)/(293 x 700) c. (273 x 700)/(293 x 760) d. (293 x 700)/(273 x 760) [4] Which species does not contain a pi bond? a. H2O b. SO2 c. CS2 d. All of the above [5] At STP, hydrogen gas is a. 1/8 as heavy as oxygen gas b. 8 times heavier than oxygen gas c. 1/10 as heavy as air d. 1/16 times as heavy as oxygen gas [6] If the density of a gas is 1.43 g/L at STP, what is the density of the gas at 25 C and 1.00 atm pressure? a. 1.95 g/L b. 1.31 g/L c. 1.57 g/L d. none of the above [7] How many electrons does chlorine have in the l=2 sublevel? a. 0 b. 1 c. 2 d. 3 e, 4 [8] The density of an unknown gas is 4.20 g/L at 3.00 atm and 127 C. What is the molecular weight of this gas? a. 14.6 g/mol b. 46.0 g/mol c. 88.0 g/mol d. 94.1 g/mol e. 138 g/mol

Explanation / Answer

b. Gaseous diffusion. a. increases b. (273 x 760)/(293 x 700) a. H2O d. 1/16 times as heavy as oxygen gas

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