Ideal gas at 2x 10 Pa and an initial temperature of 293 K slowly expand at constant pressure from a volume of 1 L to 2.5 L. (a) Find the work done on the environment (b) Final temperature (c) Number of moles of gas. ​

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Your answer is 120miles 

Carbon dioxide because it consists of one type of molecule.