7B.15

[ryuichiro_3I]

for 7B.15 why is ln[A}0 in grams and not in moles? or are we allowed to use grams and moles interchangeably?

[Lauren_Hayashi_1E]

Hi, from my understanding, you have the molarity from [A]t. Now you would convert this into grams by multiplying the molarity by L then by grams per mole to obtain grams.

[Arianna Zhou 1D]

Moles and grams of a substance can be converted to one another by finding out a molecule's molecular mass. To find [A], you can convert a grams value into moles by looking at the periodic table and adding together the masses of its constituent elements (S + 2 Os + 2 Cls), and then dividing grams by your calculated molecular mass value, and then dividing that again by the volume of the container in L.

[Taryn 1J]

I believe that the answer is in grams because the questions asks what MASS will remain rather than how many moles