Question 5 5 pts
Calculate the mass of hydrogen formed when 1.21 mol of aluminum reacts with 4.5 mol of
hydrochloric acid according to the balanced equation:
2 Al +6 HCI — 2 AlCl3 + 3 H2
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Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

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