Aresearch balloon at ground level contains 12 l of helium (he) at a pressure of 725mmhg and a temperature of 30.00∘c. when the balloon has risen to its highest altitude, the volume increases to 28 l and the pressure decreases to 252 mmhg. what will be the temperature of the gas under these conditions?

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant