Final answer:
To calculate the mass in grams of 8.65 x 10^23 molecules, you need to find the number of moles using Avogadro's number and then multiply by the molar mass of the substance. The molar mass is specific to each substance and must be known to complete the calculation.
Step-by-step explanation:
To calculate the mass in grams of 8.65 x 1023 molecules, we first need to use Avogadro's number to find the number of moles, since 1 mole contains exactly 6.02 x 1023 particles (atoms or molecules). However, we also need the molar mass of the substance, which is the mass of one mole of the substance in grams. The molar mass is equivalent to the molecular mass in amu (atomic mass units).
Here's the step-by-step calculation:
- Calculate the number of moles by dividing the given number of molecules by Avogadro's number (6.02 x 1023).
- Once you have the number of moles, multiply it by the molar mass of the substance to obtain the mass in grams.
Without knowing the molar mass of the specific substance involved, we cannot complete the calculation.