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1. To prepare a solution of NaCl (MW 58.443 (+-0.001), you weigh out 2.634 (+- 0.002) g and dissolve it in a 100-mL volumetric flask (+ -0.08 mL). What is the correct expression for the molarity of the solution? (Be sure to express your answer to the correct number of significant figures and also show the absolute uncertainty.)

2. In a titration, you use a digital titrator with very high accuracy and dispense 34.092 (+- 0.005) mL of a HCl solution that is 0.0104 (+- 0.0002) M. How many millimoles of HCl were added to the solution? (Be sure to express your answer to the correct number of significant figures and show the absolute uncertainty.)

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