Answer:
323.99 mg
Explanation:
We need to find the mass of the aspirin tablet that contains 5.0 grains of aspirin.
1 pound = 7000 grains
[tex]1\ \text{grain}=\dfrac{1}{7000}\ \text{pounds}[/tex]
[tex]5\ \text{grain}=\dfrac{1}{7000}\times 5\ \text{pounds}\\\\=\dfrac{1}{1400}\ \text{pounds}[/tex]
We know that, 1 pound = 453.592 grams
Also, 1 pound = 453592 mg
[tex]\dfrac{1}{1400}\ \text{pounds}=\dfrac{1}{1400}\times 453592\ mg\\\\=323.99\ \text{mg}[/tex]
Hence, 4 grains of aspirin contains 323.99 mg.
