Final answer:
The question entails weighing out a specific mass of sodium chloride and doing related calculations for moles and molarity, emphasizing the importance of accurate measurements and calculations in a Chemistry lab setting.
Step-by-step explanation:
The student is tasked with determining the mass of sodium chloride (NaCl). This involves a laboratory procedure and some calculations pertaining to mass, molarity, and mole conversions. The formula mass of NaCl is the sum of the atomic masses of sodium (Na) and chlorine (Cl), which is 58.44 amu. To accurately measure the mass of NaCl, one would start by placing a weighing boat on a balance and using a scoopula to weigh out approximately 7.9 g of NaCl. If one needs to prepare solutions, further steps include converting from grams to moles of NaCl using its molar mass and determining the number of moles of ions present in the solution. Preventing rounding errors in intermediate steps is crucial to ensure accurate final results when performing these measurements and calculations.