What is the value of Avogadro's number? a \( 6.63 \times 10^{-34} \) b \( 6.02 \times 10^{23} \) c \( 1.60 \times 10^{-19} \) d \( 3.00 \times 10^{8} \)

Avogadro's number, which is approximately \( 6.02 \times 10^{23} \), is a fundamental constant in chemistry that defines the number of atoms, molecules, or particles in one mole of a substance. This number helps scientists bridge the gap between the atomic scale and the macroscopic world, allowing us to count particles by weighing them! In practical terms, Avogadro's number is vital in stoichiometry, where it helps chemists figure out how much of each reactant is needed to produce a desired amount of product in chemical reactions. For instance, if you know how many moles of a reactant you start with, you can use Avogadro's number to determine the total number of molecules involved—making it easier to measure and mix your ingredients accurately!