1. What is the molar mass of Aspirin (C9H8O4)? If you have 360.4 grams of Aspirin, how many moles of Aspirin do you have? How many Aspirin molecules do you have? How many carbon atoms do you have?

(a).molar mass=(12×9)+(1×8)+(16×4)

=180.0g

(b).moles of Aspirin

moles=mass(g)÷molar mass

=360.4÷180.0

=2.002moles

(c). molecules of Aspirin

To get molecules just multiply moles of Aspirin by Avocado number.

=2.002×6.022×10^23

=1.206×10^24 molecules

(d) number of carbon atoms

=12×9

=108 carbon

your parents i think this could be it

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%