Report your answer to 3 significant figures in scientific notalion (example: 1.23E+4) unless stated otherwise. DO NOT include the unils in your answer. 1. An aqueous solution of sodium chloride is prepared by dissolving \( 5.54 \mathrm{~g} \) of sodium chloride in \( 5.05 \times 10^{2} \mathrm{~mL} \) of water. Assume that the addition of the solid does not affect the volume of the solution. INSTRUCTIONS: For each, report your answer to 3 significant figures in scientific notation unless stated otherwise. DO NOT include the units in your answer. (a) What is the molarity of sodium chloride in this solution (in mol/L)? \( \square \) \( \mathrm{mol} / \mathrm{L} \) Tries \( 0 / 5 \) (b) What is the mass percent of sodium chloride in this solution? \( \square \) \( \% \) Tries \( 0 / 5 \) (c) What is the mole fraction of sodium chloride in this solution? \( \square \)
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The molar mass of sodium chloride (NaCl) is approximately 58.44 g/mol. So, 5.54 g of NaCl is \(5.54 \, \text{g} \div 58.44 \, \text{g/mol} = 9.48 \times 10^{-2} \, \text{mol}\). Show more…
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