If a tablet of acetaminophen, c8h9no2, weighs 324 mg, how many moles are there in the tablet? if a tablet of acetaminophen, c8h9no2, weighs 324 mg, how many moles are there in the tablet? 2.15 × 10-3 4.89 × 104 48.9 466 2.15

Explanation:

number of moles of C8H9NO2 =

The trick is to remember to convert milligrams to grams because molar mass is normally presented in grams per mole

the answer is either b or c

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%