Reference no: EM132252003
1. A sample of methane gas collected at a pressure of 1.41 atm and a temperature of 25.0 °C is found to occupy a volume of 20.3 liters. How many moles of CH4 gas are in the sample? ___ mol
2. A sample of oxygen gas collected at a pressure of 1.23 atm and a temperature of 286 K is found to occupy a volume of 588 milliliters. How many moles of O2 gas are in the sample? __mol
3. A helium-filled weather balloon has a volume of 646 L at 15.9°C and 758 mmHg. It is released and rises to an altitude of 5.65 km, where the pressure is 448 mmHg and the temperature is -17.1°C.
The volume of the balloon at this altitude is ___ L.
4. A sample of krypton gas occupies a volume of 7.82 L at 43.0°C and0.830 atm.
If it is desired to decrease the volume of the gas sample to 5.39 L, while increasing its pressure to 1.02 atm, the temperature of the gas sample at the new volume and pressure must be ___ °C.
5. A sample of methane gas at a pressure of 0.625 atm and a temperature of 203 °C, occupies a volume of 634 mL. If the gas is heated at constant pressure until its volume is 916 mL, the temperature of the gas sample will be __ °C.
6. A sample of oxygen gas at a pressure of 797 mm Hg and a temperature of 36 °C, occupies a volume of 7.78 liters. If the gas is heated at constant pressure to a temperature of 72 °C, the volume of the gas sample will be ___ L.