Question

Please answer both parts.

For the chemical reaction,

2Al+3H2SO4⟶3H2+Al2(SO4)3
  1. how many moles of hydrogen (H2) are produced from 4.0 mol of aluminum (Al)?

For the chemical reaction,

3KOH+H3PO4⟶K3PO4+3H2O
  1. what mass of phosphoric acid in grams is needed to produce 3.47 mol of water?

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