Answer:
1. use a ruler to measure how many heights the ball falls down.
2. use notes to record observations.
The limiting reactant in the reaction would be the compound that would be consumed completely in the reaction. The balanced chemical reaction for this problem is written as:
<span>MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
From the reaction and the amounts present of the reactant, the limiting reactant would be HCl or hydrochloric acid. Ten moles of HCl only need 2.5 moles of MnO2. Hope this helps.</span>
Cl, because a higher electronegativity indicates that the atom attracts more electrons.