asked by @wendya2 •
9 months ago •
Chemistry
• 5 pts

Determine each of the following: a. The number of moles of C atoms in 3.20 moles of C2H6O. b. The number of molecules in 3.20 moles of C2H6O. c. The number of C atoms and the total number of atoms in 3.20 moles of C2H6O. d. The number of molecules required to have 135 atoms in total.

Hey there!

For a, since there are 2 atoms of C in C2H6O, we just have to multiply 2 by 3.20

(2 moles of C) 3.20= 6.4 moles of C

For b, you'll use the Avogadro's number and multiply it by 3.2

(3.20 moles)((6.026x10^23 atoms)/(1mol)=1.928x10^24 atoms of C2H6O

For c, just multiply the answer for b in 2

(1.928x10^24)(2)= 3.856x10^24 C atoms

For d, just divide the number of atoms in each molecule which is 2. So that will be

135/2=67.5 or 68 molecules of C2H6O

answered by @reyn •
9 months ago

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