Chem
posted by Anna .
Can someone check these homework answers please?
32. The barometric pressure measured outside an airplane at 9 km was 259 mmHg. Calculate the pressure in kPa.
34.5 kPa
36. A diving bell is a container open at the bottom. As the bell descends, the water level inside changes so that the pressure inside equals the pressure outside. Initially, the volume of the air is 8.58 m^3 at 1.020 atm and 20 degrees C. What is the volume at 1.584 atm and 20 degrees C.
5.52 m^3
40. A mole of gas at 0 degrees C and 760 mmHg occupies 22.41 L. What is the volume at 20 degrees C and 760 mmHg?
24.1 L
44. A sample of 62.3 cm^3 of argon gas at 18 degrees C was contained at a pressure of 155 kPa in a Jshaped tube with mercury. Later the temperature changed. When the mercury level was adjusted to give the same pressure of argon, the gas volume changed to 50.9 cm^3. What was the final temperature of the argon?
243. K
And I need help with this problem.
Methanol can be produced in industrial plants by reacting carbon dioxide with hydrogen in the presence of a catalyst. Water is the other product. how many volums of hydrogen are required for each volume of carbon dioxide when each gas is at the same temperature and pressure?
Is this just a mol mol comparison within the formula? What is is the unbalanced formula?

For #40 I get 24.05 which I would round to 24.0.
For #44 I used (V1/T1) = (V2/T2)
62.3/291 = 50.9/T2 and for T2 I obtained 237.9 which rounds to 238 K.
For the last problem,
CO2 + 3H2 ==>CH3OH + H2O
When everything is present as a gas (I think this is at elevated temperature so H2O will be a gas), you need not go through the mole procedure but you may take a short cut and use volumes directly. Therefore, 3 volumes of H2 are required for each volume of CO2; i.e., 1 liter of CO2 will take 3 liters of H2 (and will produce 1 liter CH3OH and 1 liter of H2O
Respond to this Question
Similar Questions

math
Atmospheric pressure V decreases as altitude h increases. At a temperature of the pressure is 101.1kilopascals kPa at sea level, 86.4 kPa at h = 1 km, and 77.1 kPa at h = 2 km. Use a linear approximation to estimate the atmospheric … 
physical science
If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 KPa B. 277.280 KPa C. 448.955 KPa D. 651.605 Kpa 
chem
Nitrogen(75.5 kPa), oxygen (19.2 kPa), carbon dioxide(0.05 kPa) and water vapor(4.3 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa? 
Physics
A cylindrical diving bell 4.0m tall, with an open bottom, is lowered to the bottom of a lake on a day when atmospheric pressure is 100 kPa. It is observed that water rises inside the bell to within 1.0m of the top. A)What is the pressure … 
Chemistry
A sample of gas is in a 50.0mL container at a pressure of 86 kPa and a temperature of 25°C. The entire sample is heated to a temperature of 35°C and transferred to a new container whose volume is 65.0mL. The pressure of the gas in … 
CHEMISTRY
A 44.1 L sample of nitrogen gas at a pressure of 88.3 kPa is placed into a container of equal volume that already holds hydrogen gas at a pressure of 125.6 kPa. ! What is the partial pressure of the nitrogen in the new container? 
physics
1500 cm^3 of ideal gas at STP is cooled to 20°C and put into a 1000 cm^3 container. What is the final gauge pressure? 
physics
1500 cm3 of ideal gas at STP is cooled to 20°C and put into a 1000 cm3 container. What is the final gauge pressure? 
chem
All the oxygen gas from a 22.0L container at a pressure of 72.2 kPa is added to a 18.0L container of hydrogen at a pressure of 150. kPa. After the transfer, what is the partial pressures of hydrogen? 
chemistry
The gas in a fixed container was at STP before is was lifted by a balloon into the atmosphere. What would the new pressure be in kPa if the temperature at a higher altitude was 268 K?