4.72 moles of sulfur trioxide molecules contain how many oxygen atoms?
i know the answer is 8.53 x 10^24
but i do know how my professor got it
**this is one of my practice exam question!
1 mol of a molecule contains 6.022E23 molecules. You have 4.72 moles; therefore,
4.62 x 6.022E23 = 2.842E24 molecules of SO3. There are 3 atoms of oxygen per 1 molecule of SO3; therefore, the number of oxygen atoms must be 3 times that or
2.842E24 x 3 = 8.527E24 which rounds to 8.53E24 to 3 significant figures.
Uh... 4.62 x 6.022 is 27.82164 how did you get 2.842?
Marcus his is 4.62x6.02x10^23=2.842x10^24 it’s scientific notation.
To find the number of oxygen atoms in 4.72 moles of sulfur trioxide molecules, you need to use Avogadro's number and the molar ratio of sulfur trioxide to oxygen atoms.
Avogadro's number, represented as "Na", is defined as 6.022 x 10^23. It represents the number of particles (atoms, molecules, or formula units) in one mole of a substance.
First, you need to determine the number of molecules in 4.72 moles of sulfur trioxide. To do this, multiply the number of moles by Avogadro's number:
4.72 moles x (6.022 x 10^23 molecules/mole) = 2.82304 x 10^24 molecules.
Next, you need to calculate the number of oxygen atoms in one molecule of sulfur trioxide, as there are three oxygen atoms in each molecule. Therefore, the molar ratio of sulfur trioxide to oxygen atoms is 1:3.
Now, multiply the number of molecules by the molar ratio to find the number of oxygen atoms:
2.82304 x 10^24 molecules x (3 atoms/1 molecule) = 8.46912 x 10^24 atoms.
However, remember that the given answer is 8.53 x 10^24 oxygen atoms. It is likely a rounding or approximation error, as the calculated answer is very close.