Final answer:
The question involves high school chemistry where students learn to calculate molecular mass of covalent compounds and formula mass of ionic compounds using given element quantities and atomic masses.
Step-by-step explanation:
Understanding Molecular and Formula Mass Calculations
The student's question is related to calculating the molecular mass and formula mass of compounds, a common topic in high school chemistry. The diagrams and tables provide the necessary information to calculate the molecular mass of a compound by multiplying the quantity of each element by its atomic mass and adding the resultant products. In the first example, we have elements like Carbon (C), Hydrogen (H), and Chlorine (Cl), and their respective quantities and atomic masses are provided to calculate the Subtotal of each element, which are then summed to give the Molecular mass. The second example includes Sodium (Na) and Chlorine (Cl) to determine the Formula mass which is essential in calculating the mass of an ionic compound. Consistent with the terms of the worksheets, molecular mass typically applies to covalent compounds, while formula mass is associated with ionic compounds.
Understanding these concepts not only facilitates the calculation of the mass of various substances but also lays the groundwork for stoichiometry, which involves calculating the amounts of reactants and products involved in chemical reactions. The practical steps in these examples serve as a foundation for students to handle more complex chemical formulas and reactions.