We are asked how many kilograms of iron were needed to produce this volume of H_{2} if the temperature was 24 ^{o}C.

Calculate moles H_{2}:

Given:

Given:

P = 1.00 atm

T = 24 ^{o}C +273.15 = 297.15 K

V = 31200 L

R= 0.08206 L-atm/mol-K

Both Jacques Charles and Joseph Louis Guy-Lussac were avid balloonists. In his original flight in 1783, Jacques Charles used a balloon that contained approximately 31200 L of H_{2}. He generated the H_{2} using the reaction between iron and hydrochloric acid:

Fe(s) + 2 HCl(aq) → FeCl_{2}(aq) + H_{2}(g)

How many kilograms of iron were needed to produce this volume of H_{2} if the temperature was 24 ^{o}C? (For simplicity, assume that the pressure experienced by the balloon will be 1.00 atm.)

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