17. __ Which would likely result in a lower percent yield? a. Using pure reactants b. Careful collection of product c. Allowing moisture to contaminate reactants d. Precise measurement of reactants

## Step 1<br />The problem is asking us to identify which of the given options would likely result in a lower percent yield in a chemical reaction. The percent yield is a measure of the efficiency of a chemical reaction, and it is calculated by dividing the actual yield (the amount of product actually produced) by the theoretical yield (the amount of product that would be produced if the reaction were perfect), and then multiplying by 100.<br /><br />## Step 2<br />Let's analyze each option:<br /><br />a. Using pure reactants: This would likely result in a higher percent yield because there are no impurities to interfere with the reaction.<br /><br />b. Careful collection of product: This would also likely result in a higher percent yield because it ensures that all of the product is collected, rather than some of it being lost.<br /><br />d. Precise measurement of reactants: This would likely result in a higher percent yield because it ensures that the correct amount of reactants is used, which is necessary for the reaction to proceed correctly.<br /><br />## Step 3<br />c. Allowing moisture to contaminate reactants: This would likely result in a lower percent yield because moisture can interfere with the reaction, either by reacting with the reactants or by diluting them. This would mean that less product is produced than expected, leading to a lower percent yield.