once billy and susie have the unobtanium at the melting point, (use my other questions for reference) how much heat must be absorbed to melt all the unobtanium (heat of fusion: 50.3kJ/mol; molar mass 322.03g/mol)

What is limiting reactant? with examples

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

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