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# A ml sample of nacl solution has a mass of g after the nacl solution is evaporated to dryness

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e of a weak acid in 32.9 mL of water is titrated with 0.0755 M Ca(OH)2. Calculate the molarity of the weak acid being utilized in the titration above. (do not provide units and follow significant figure rules).
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to a sample of the solution taken from a saturated solution of calcium sulfate. b. Explain, with calculations optional, why this will be effective as a qualitative rather than a quantitative test in the Science classroom, for a 20 mL sample. How do you do the calculations for part b?
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r containing nitrogen at 17.3 atm. What is the final pressure when both the cylinders have achieved equilibrium (reached the same pressure)? 6. An analytical procedure requires a solution of chloride ions. How many grams of BaCl2 must be dissolved to make 360 ml of 0.2 M Cl– ? (M BaCl2 = 208 g/mol) 7. Find the concentration of chloride ions when 344.4 mL of 2.4 M NaCl is mixed with 364 mL of 2.9 M KCl? 8. A sample of an unknown gas had a density of 1.45 g/L at 20.5 °C and 1.2 atm. Calculate the molar mass of the gas. (R = 0.08206 L·atm·mol-1·K-1)
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rite only the answer to two decimal digits
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after the addition of 16.9 mL of NaOH? (pKa of HNO2 = 3.37)
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after the addition of 16.9 mL of NaOH? (pKa of HNO2 = 3.37) Keep 2 decimal places in your answer.
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lar mass -KMnO4 = 158 g/mol) used in titration of 100 mL raw-water sample diluted 1:20 was 9,2 mL. Calculate the orientative amount of Fe(III)-sulfate coagulant needed to be added to 600mL of water sample in a coagulation-flocculation experiment.
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

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