Molality can be calculated as:
We will be solving for the moles of S8 first and then mass of S8 using its molar mass
Molar mass of S8 is:
S - 32.07 (8) = 256.56 g/mol
How many grams of sulfur (S8) must be dissolved in 100.0 g naphthalene (C10H8) to make a 0.13 m solution?
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