170
Gases
(a) What volume of CO 2 , at standard conditions, does the average 18-year-old
make each day
9
(b) What weight of CO 2 does he make each day'
36 An organic compound containing C, H, O, and N is analyzed When a sample
weighing 0 01230 g is burned, it produces 18 62 mg of CO 2 (absorbed in a
soda-lime tube) and 7 62 mg of H 2 O (absorbed in a tube containing
MglClOJaJ When another sample, weighing 0 005 l()g, is burned, the CO 2 and
H 2 O are absorbed, and the N 2 formed is collected in a measuring tube At 730
torr and 22°C, the N 2 gas displaces an equal volume of mercury, which is
weighed and found to weigh 15 000 g The density of mercury is 13 56 g/ml
Calculate the empirical formula of the compound
PROBLEMS B
37 A graduated gas tube, sealed at the upper end, has a mercury filled leveling
bulb connected to the lower end The gas volume is 17 2 ml when the leveling
bulb is 8 cm above the other mercury level What will be the gas volume when
the leveling bulb is 8 cm below the other mercury level
17 The barometric
pressure is 738 torr
38 If a barometer were filled with a silicone fluid whose vapor pressure is very
low but whose density is 1 15 g/ml, what would be the barometer reading
when the atmospheric pressure is 710 torr
7 (The density of mercury is 13 56
g/ml )
39 A gas pressure is measured as 826 4 mm with a mercury manometer in a lab
whose temperature is 24°C A brass scale is used Express this gas pressure in
torr
40 A gas pressure is 690 torr What is its pressure in dynes/cm-'
41 What is the volume at 730 torr and 27°C of 350 ml of H 2 S at standard conditions'
42 A 50 0 ml quartz vessel is filled with O 2 at 300 torr and at 35°C It is then
heated to 1400°C in an electric furnace What will be the oxygen pressure at
the higher temperature
17
43 A sample of NH 3 gas collected over mercury measures 595 ml at 19°C and 755
torr What will be its volume at standard conditions'
44 What will be the final gas pressure when 3 0 liters of CO at 2 0 atm, 6 0 liters of
Ar at 4 0 atm, and 2 0 liters of C 2 H 6 at 5 0 atm are mixed and transferred to a
8 0 liter vessel
9
45 A 375 ml sample of hydrogen is collected over water at 18 C and 720 torr
What is its volume at standard conditions'
46 What will be the difference in volume occupied by 0 100 g of hydrogen at 740
torr and 19°C if it is collected over water instead of mercury'
Gases
(a) What volume of CO 2 , at standard conditions, does the average 18-year-old
make each day
9
(b) What weight of CO 2 does he make each day'
36 An organic compound containing C, H, O, and N is analyzed When a sample
weighing 0 01230 g is burned, it produces 18 62 mg of CO 2 (absorbed in a
soda-lime tube) and 7 62 mg of H 2 O (absorbed in a tube containing
MglClOJaJ When another sample, weighing 0 005 l()g, is burned, the CO 2 and
H 2 O are absorbed, and the N 2 formed is collected in a measuring tube At 730
torr and 22°C, the N 2 gas displaces an equal volume of mercury, which is
weighed and found to weigh 15 000 g The density of mercury is 13 56 g/ml
Calculate the empirical formula of the compound
PROBLEMS B
37 A graduated gas tube, sealed at the upper end, has a mercury filled leveling
bulb connected to the lower end The gas volume is 17 2 ml when the leveling
bulb is 8 cm above the other mercury level What will be the gas volume when
the leveling bulb is 8 cm below the other mercury level
17 The barometric
pressure is 738 torr
38 If a barometer were filled with a silicone fluid whose vapor pressure is very
low but whose density is 1 15 g/ml, what would be the barometer reading
when the atmospheric pressure is 710 torr
7 (The density of mercury is 13 56
g/ml )
39 A gas pressure is measured as 826 4 mm with a mercury manometer in a lab
whose temperature is 24°C A brass scale is used Express this gas pressure in
torr
40 A gas pressure is 690 torr What is its pressure in dynes/cm-'
41 What is the volume at 730 torr and 27°C of 350 ml of H 2 S at standard conditions'
42 A 50 0 ml quartz vessel is filled with O 2 at 300 torr and at 35°C It is then
heated to 1400°C in an electric furnace What will be the oxygen pressure at
the higher temperature
17
43 A sample of NH 3 gas collected over mercury measures 595 ml at 19°C and 755
torr What will be its volume at standard conditions'
44 What will be the final gas pressure when 3 0 liters of CO at 2 0 atm, 6 0 liters of
Ar at 4 0 atm, and 2 0 liters of C 2 H 6 at 5 0 atm are mixed and transferred to a
8 0 liter vessel
9
45 A 375 ml sample of hydrogen is collected over water at 18 C and 720 torr
What is its volume at standard conditions'
46 What will be the difference in volume occupied by 0 100 g of hydrogen at 740
torr and 19°C if it is collected over water instead of mercury'