total pressure (PT) = 751mmHg
partial pressure of water at 270C(PH2O) = 26.8mmHg
PH2 = PT-PH2O
= 751-26.8
= 724.2mmHg
= 724.2/760
= 0.953atm
V = 30.7ml = 0.0307L
T = 27+273 = 300K
PV = nRT
n = PV/RT
= 0.953*0.0307/(0.0821*300)
= 0.001187moles
2Al(s) + 6HCl(aq) -----------> 2AlCl3(aq) + 3H2(g)
3 moles of H2 produced from 2 moles of Al
0.001187moles of H2 produced from = 2*0.001187/3 = 0.0008 moles of Al
mass of Al = no of moles * gram atomic mass
= 0.0008*27
= 0.0216g of Al >>>>answer
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 30.7 mL of hydrogen...
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