Determine the number of moles of hydrogen atoms in each sample. d. 1.87 mol C₈H₁₈

Key Concepts

Moles and Avogadro's Number

A mole is a unit in chemistry that represents 6.022 x 10^23 entities, such as atoms or molecules. This concept is fundamental for quantifying substances in chemical reactions and allows chemists to convert between the mass of a substance and the number of particles it contains.

Molecular Formula

The molecular formula of a compound indicates the number and type of atoms present in a molecule. For example, C8H18 (octane) contains 8 carbon atoms and 18 hydrogen atoms. Understanding the molecular formula is essential for determining the composition of a substance and calculating the number of moles of its constituent atoms.

Stoichiometry

Stoichiometry is the area of chemistry that deals with the relationships between the quantities of reactants and products in chemical reactions. It allows for the calculation of the number of moles of different substances involved in a reaction, which is crucial for solving problems related to chemical quantities, such as finding the number of moles of hydrogen atoms in a given sample.