Advertisements
Advertisements
प्रश्न
Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4 × 10−3 dm3 of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogen gas (in mg) did the student collect?
Advertisements
उत्तर
Given, V = 154.4 × 10−3 dm3
P = 742 mm of Hg
T = 298 K
m = ?
n = `"PV"/"RT"`
= `(742 "mm Hg" xx 154.4 xx 10^-13 "L")/(62 "mm Hg L K"^-1 "mol"^-1 xx 298 "K")`
= 0.006 mol
n = `"Mass"/("Molar mass")`
Mass = n × Molar Mass
= 0.0006 × 2.016
= 0.0121 g
= 12.1 mg
APPEARS IN
संबंधित प्रश्न
State (i) the three variables for gas laws and (ii) SI units of these variables.
Convert the following temperature from degree Celcius to kelvin.
25° C
Convert 0.124 torr to the standard atmosphere
Identify the gas laws from the following diagram.
| Diagram | Gas laws |
 |
______________ |
Match the pairs of the following:
| Column ‘A’ | Column ‘B’ |
| a. Boyle’s law | i. at constant pressure and volume |
| b. Charles’ law | ii. at constant temperature |
| iii. at constant pressure |
Solve the following.
A syringe has a volume of 10.0 cm3 at pressure 1 atm. If you plug the end so that no gas can escape and push the plunger down, what must be the final volume to change the pressure to 3.5 atm?
The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called __________.
Explain the following observation.
The size of a weather balloon becomes larger and larger as it ascends up to larger altitude
A certain sample of gas has a volume of 0.2 L at one atmosphere pressure and 273.15 K. What is the volume of gas at 273.15°C at same pressure?
10 g of gas at one atomospheric pressure is cooled from 273.15°C to 0°C keeping the volume constant. What is the final pressure?
