Final answer:
To find the number of moles in 127.5 grams of Sodium Chloride, divide the mass by the molar mass (58.44 grams/mole), which gives approximately 2.18 moles of NaCl.
Step-by-step explanation:
To calculate how many moles are in 127.5 grams of Sodium Chloride (NaCl), we need to use the molar mass of NaCl as a conversion factor. The molar mass of NaCl is 58.44 grams/mole. Therefore, the number of moles in 127.5 grams of NaCl can be calculated by dividing the mass of the NaCl by its molar mass.
Here is the calculation:
- Convert the mass of NaCl (127.5 grams) to moles using the molar mass (58.44 grams/mole).
Moles of NaCl = 127.5 grams ÷ 58.44 grams/mole = 2.18 moles of NaCl.
This conversion is a fundamental skill in chemistry that enables chemists to relate the mass of a substance to the amount of substance in moles. Knowing the number of moles is crucial for understanding the stoichiometry of chemical reactions and for preparing solutions of known molar concentration.