Final answer:
To calculate the moles of acetic acid in 8.3 mL of vinegar, you need to know the concentration of acetic acid and then use its molar mass. Moles are important in chemical calculations because they allow us to determine the amounts of substances involved in reactions using mole ratios.
Step-by-step explanation:
To calculate the number of moles of acetic acid in 8.3 mL of vinegar, we need to know the concentration of acetic acid in the vinegar. If we assume the vinegar is a 100% acetic acid solution, we can use the density of vinegar to calculate its mass. From the mass, we can then calculate the number of moles of acetic acid using its molar mass.
The importance of moles in chemical calculations lies in the fact that mole ratios are used to convert between mass and moles of substances in chemical reactions. The mole ratio is determined from the balanced chemical equation and allows us to calculate the amounts of reactants and products involved in a reaction. This is crucial for determining the theoretical yield, limiting reactant, and stoichiometry of a reaction.