Chemistry

Question

Calculate the number of moles in 5 grams of NaCl. (Molar mass of Na = 23 g/mol, Cl = 35.5 g/mol)A 50 mL solution of HCl has a pH of 2. Calculate the concentration of HCl in the solution.Determine the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass.
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