# i want to confirm my answers to the questions because this is the last big test of the semester.

Anonymous

### Question Description

please put all the work and box the answers please and for question 5 i beleieve my teacher made a mistake and meant to add it to four

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1. Calculate the number of moles of sulfuric acid that is contained in 250 mL of 8.500 M sulfuric acid solution 2.7.300 moles of sodium nitrite are needed for a reaction. The solution is 5.450 M. How many mL are needed? 3.What mass (in g) of NH3 must be dissolved in 875 g of methanol to make a 0.430 molal solution? 4.Calculate the molality of a solution that is prepared by mixing 259.5 mL of CH3OH 5.(d = 0.792 g/mL) and 1387 mL of CH3CH2CH2OH (d = 0.811 g/mL) 6.A solution is prepared by dissolving 318.6 g sucrose (C12H22O11) in 4905 g of water. Determine the molarity of the solution 7.Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molarity of the HCl, if the solution has a density of 1.20 g/mL. 8. Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the mol of the HCl, if the solution has a density of 1.20 g/mL. 9. Determine the freezing point depression of a solution that contains 50.7 g glycerin (C3H8O3, molar mass = 92.09 g/mol) in 376 mL of water. Some possibly useful constants for water are Kf = 1.86°C/m and Kb = 0.512°C/m. 10. For the previous question determine the boiling point elevation for the same solution 11. Calculate the boiling point of a solution of 570.0 g of ethylene glycol (C2H6O2) dissolved in 800.0 g of water. Kf = 1.86°C/m and Kb = 0.512°C/m. Use 100°C as the boiling point of water. 12. For the previous question determine the freezing point depression 13. What volume of a 0.6 M KBr solution is needed to provide 30.5 g of KBr? 14. What volume of 3.00 M CH3COOH solution is needed to provide 0.220 mol of CH3COOH? ...
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