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Question 1: choose the correct answer from the following 1 liter is: a. 1000 milliliters b. 100 milliliters C. 10 milliliters d. 1 milliliters 1- The atmosphere is a unit of: a. b. c. d. 2- Volume Temperature Pressure density 560 mmHg is equal to : a. b. c. d. 0.56 atm 0.74 atm 0.73 atm 0.47 atm 3- Calculate the pressure of 0.55 mol of NH3 gas in a 2.00 L vessel at 25 °C, using the ideal gas law. a. 2.5 atm b. 6.7 atm c. 0.6 atm d. 7.5 atm e. 3.4 atm 4- The neutralization reaction is a reaction between a. b. c. d. Salt and another salt Acid and base Acid and ester Alcohol and acid 5- If the volume in liter and mass by kilogram what is the unit of density a. b. c. d. g/L mg/ml kg/L kg/ml 6- the viscosity is directly proportional to one of the following factors a. density b. temperature c. pressure d. volume 7- Unit of molality of liquid is a. Liter/Gram b. Mole /Kilogram c. Mole / Liter d. Mole / mL 8- All of the following is the name of Ka except: a. Equilibrium constant b. Dissociation constant c. Ionization constant d. Velocity constant 9- What is the point which all acid convert to conjugated base a. Equivalent point b. Boiling point c. Triple point d. Freezing point Question 2: answer the following question using suitable law 1- Calculate the molar mass of vapor from an unknown liquid occupied a 283 mL at 99.5 0C and 443 mmHg. The mass of vapor is 1.2 gm? R = 0.08206 L.atm/mole.K 2- What is the number of mole of solute which dissolve in liquid freezes at 3.0 0C. the mass of liquid is 21.31 gm while after dissolve solute freezes at -4.0 0C. Kf = 6.8? 3- What is the heat of reaction when the temperature change from 28 0C to 75 0C and the volume of product is 250 ml (d = 1.204 g/ml) where specific heat is 4.215 J/g 0C? 4- In acid base reaction the volume of acid is 20 ml while the equivalent point of titration at 25 ml of 0.01M of base what is the concentration of acid? 5- What is the viscosity of oil if the time of flow in the same pipette of oil is 854 sec and for glycerin is 5 minuet and densityes of oil and glycerin is 2.05 and 1.88 gm/mL. viscosity of glycerin is 22.5 centipoises? 6- Mass of condensed vapour = 0.395 g at 960C and 755 mm Hg which occupied by 137 mL. What is the molar mass of the liquid? R = 0.08206 L.atm/mole.K 7- A 0.65 g sample of unknown substance was dissolve in 50 ml of cyclohexane. The density of cyclohexane is 0.779 g/mL. the freezing point depression was 2.50 0C. Calculate the molar mass of unknown substance. [Kf(cyclohexane) = 20.0 0C/m] 8- Acid its pH at ½ of equivalent point is 9.24. What is the pKa of the acid and find Ka. 9- When 50 L potassium hydroxide solution, NaOH 1.0 M is added with 50 L hydrochloric acid HCl 1.0 M, the temperature of mixture increase 6.2 oC. Calculate the heat released form this reaction. specific heat capacity is 4.2 J/g. oC. 10- From the above question calculate the heat of neutralization for this reaction(∆H). by KJ/mole