Answer:
0.0103 mol
Explanation:
Step 1: Given data
- Mass of the naproxen sodium tablet (m): 200. mg
- Molar mass of naproxen sodium (M): 252 g/mol
Step 2: Convert "m" to grams
We will use the conversion factor 1 g = 1000 mg.
200. mg × 1 g/1000 mg = 0.200 g
Step 3: Calculate the moles (n) of naproxen sodium
We will use the following expression.
n = m/M = 0.200 g / (252 g/mol) = 7.94 × 10⁻⁴ mol
Step 4: Calculate the moles of hydrogen in 7.94 × 10⁻⁴ moles of naproxen sodium
According to the chemical formula, the molar ratio of naproxen sodium to H is 1:13. The moles of H are 13/1 × 7.94 × 10⁻⁴ mol = 0.0103 mol.
