Answer:
C. The dissolving reaction of A was exothermic and the dissolving of reaction B was endothermic
Explanation:
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Answer:- HBr is limiting reactant.
Solution:- The given balanced equation is:
From this equation, There is 2:6 mol or 1:3 mol ratio between Al and HBr. Since we have 8 moles of each, HBr is the limiting reactant as we need 3 moles of HBr for each mol of Al.
The calculations could be shown as:
= 24 mol HBr
From calculations, 24 moles of HBr are required to react completely with 8 moles of Al but only 8 moles of it are available. It clearly indicates, HBr is limiting reactant.
→
is the balanced chemical equation.
A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.
Half-reaction method:
Unbalanced chemical equation:
→
Oxidation half-reaction:
→ I
Reduction half-reaction:
→
Balanced chemical equation:
→
Oxidation number method:
Unbalanced chemical equation:
→
→
→
Balanced chemical equation:
→
or
→
Hence, →
is the balanced chemical equation.
Learn more about the balanced chemical equation here:
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