Tutor profile: Stephanie T.
Subject: SAT II Chemistry
When asked to find the amount of yield of a specific product, when must you consider if the problem involves a limiting reactant?
Limiting reactions must be considered in problems where amounts (mass, moles, volume+molarity) of both reactants are given. In problems that do not involve a limiting reaction, the wording of the problem will often denote which reactant is in excess.
What is the difference between a polar bond and a polar molecule?
A polar bond is based on an electronegativity difference between two bonded atoms, while a polar molecule relates more to the symmetry based on the VSEPR theory and not whether we could draw a Lewis structure in a symmetrical manner.
Subject: Basic Chemistry
What is the only situation in which the balanced chemical equation can have fractional coefficients?
Heat of formation reactions are the only situation in which balanced chemical equations can have fractional coefficients.
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