1.) A tank of oxygen holds 22.0 L of oxygen (O2) at a pressure of 22.0 atm. When the gas is released, it provides 390. L of oxygen.
What is the pressure of this same gas at a volume of 390. L and constant temperature?
Express your answer with the appropriate units.
2.) A 139-mL bubble of hot gases at 202 °C and 1.76 atm escapes from an active volcano.
What is the temperature, in °C, of the gas in the bubble outside the volcano if the new volume of the bubble is 169 mL and the pressure is 0.719 atm ?
Express your answer using two significant figures.
3.) Hydrogen gas can be produced in the laboratory through the reaction of magnesium metal with hydrochloric acid:
Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)
What is the volume, in liters, of H2 gas produced at 28 °C and 850 mmHg from the reaction of 34.0 g of Mg?
Express your answer with the appropriate units.