Aspirin has the formula C9H8O4. How many atoms of oxygen are there in a tablet weighing 360 mg?
A. 1.204 × 10^23
B. 1.08 × 10^22
C. 1.204 × 10^24
D. 4.81 × 10^21

To find out how many atoms of oxygen are in a tablet of aspirin, we need to follow these steps:

Calculate the number of moles of aspirin using its molar mass.
Use the chemical formula of aspirin to determine the number of oxygen atoms.
Convert the number of oxygen atoms to find the total number of atoms in the tablet.
The molar mass of aspirin (C9H8O4) can be calculated by adding up the atomic masses of its constituent atoms:

Carbon (C): 12.01 g/mol
Hydrogen (H): 1.008 g/mol
Oxygen (O): 16.00 g/mol
Molar mass of aspirin = (9 * 12.01 g/mol) + (8 * 1.008 g/mol) + (4 * 16.00 g/mol)
= 180.17 g/mol

Now, we can find the number of moles of aspirin in a tablet weighing 360 mg:

Number of moles = Mass (in grams) / Molar mass
= 0.360 g / 180.17 g/mol
= 0.002 moles