Answer:
1.08X10²¹ molecules aspirin are in the tablet
Explanation:
Molar mass of aspirin is 180.15 g/m (C₉H₈O₄)
This data means that 1 mol weighs 180.15 g so:
325 mg = 0.325 g
If 180.15 g are contained in 1 mol of aspirin
0.325 g (which is the weight from the tablet) are contained in ...
(0.325 g .1m)/180.15 g = 1.80x10⁻³ moles
1 mol has 6.02x10²³ molecules (NA)
1.80x10⁻³ moles are contained by ...
1.80x10⁻³ . NA = 1.08X10²¹ molecules
