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QUESTION 31 A solution was made by dissolving 26.5g of Na2CO3 in 500.0 mL of water....
PLEASE HELP DUE IN 15 MINS A 10 g of water was found to contain 10...
PLEASE HELP DUE IN 15 MINS
A 10 g of water was found to contain 10 mg of Hg2+ What is the concentration of Hg in ppm? (ppm = (mass of solute/mass of solvent)x1067 O A 1000 08.10 OC 100 OD 10000 OE 100000 A water solution has 146.0 g of HCl and 288 g of water. What is the mole fraction of HCl in this solution? [mole fraction of component = moles of component/total moles of all components] Please...
Hint: Change in temperature, AT = KX molality X Van't Hoff factor CA 1 M CscI...
Hint: Change in temperature, AT = KX molality X Van't Hoff factor CA 1 M CscI OB 2 M CaCl2 OC. 1 M TI(NO3)3 OD 2 M Naci OE 2 M Sn(NO3)4 QUESTION 34 Which statement best describes the colligative properties of a solvent OA Depend on the nature of the solute OB Independent of the solute concentration c. Independent on the nature of the solute OD. Depend on the solute concentration OE. Both C and D QUESTION 35 Lowering...
145.0 moles of CaCO3 is dissolved in 5.0 L of water, what is the concentration of...
145.0 moles of CaCO3 is dissolved in 5.0 L of water, what is the concentration of CaCo3? 20C940.6C12.8016 ASM OB 2.5M OC 1.5M 0,0.5M OE 1M QUESTION 29 A solution was made by dissolving 53.0 g of Na2CO3 in 500.0 mL of water. What is the molarity of this solution? (molarity - moles of solute/liters of solution) 1Na23, 6C12.8016 CA50M OR 2.0M OC 1.5M 0.0.5M OL 1.0M QUESTION 30 If 0.250 mol of NaOH is dissolved in 125.0 mL of...
A salt solution was made by dissolving 17.32 g of NaCl in 400.0 mL of water....
A salt solution was made by dissolving 17.32 g of NaCl in 400.0 mL of water. Calculate the molality (NOT molarity) of this solution Hint: Molality (m) = moles of solute / Kg of solvent Use 11Na23 and 17Cl35.5
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water...
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water to make 200 mL of solution. If the density of the solution is 1.1094 g/mL, what is the % mass of the solution? Question 18 Calculate the molarity of a 4.628 m solution of Sr(NO3)2 in H2O. The density of this solution is 1 g/mL Include units. Question 19 What is the molarity of a sodium chloride solution prepared by diluting 2.1 mL of...
1. A solution is prepared by dissolving 20.2 mL CH,OH in 100.0 mL HO at 25...
1. A solution is prepared by dissolving 20.2 mL CH,OH in 100.0 mL HO at 25 degrees Celsius. The final volume of the solution is 118.0 mL. The densities of CHOH and H,O are 0.782 g/mL and 1.00 g/mL, respectively. For this solution, calculate molality, molarity, mole fraction of each component and % by mass of each component. 2. A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 258 torr....
6 A solution is made by dissolving 35.5 g of Ba(NO2)2 in 500.0 mL of water....
6 A solution is made by dissolving 35.5 g of Ba(NO2)2 in 500.0 mL of water. Does Ba2+ have any acidic or basic properties? a O of 2 points earned 20 attempts remaining Does NO, have any acidic or basic properties? O of 2 points earned 20 attempts remaining Write the basic equilibrium equation that exists in solution с O of 2 points earned 20 attempts remaining What is the value of Kb for NO2-? The Ka of HNO2 is...
Dissolving 5.57 g of CaCl2 in enough water to make 288 mL of solution causes the temperature of the solution to increase...
Dissolving 5.57 g of CaCl2 in enough water to make 288 mL of solution causes the temperature of the solution to increase by 3.77 oC. Assume the specific heat of the solution and density of the solution are the same as water′s (about 4.18 J/goC and 1.00 g/cm3, respectively) Calculate ΔH per mole of CaCl2 (in kJ) for the reaction under the above conditions. Hint given in feedback Aside, the ΔH per mole for dilution depends on the process. For...
a) A 50.0 mL sample of a 1.00 M solution of CuSO4 is mixed with 50.0 mL...
a) A 50.0 mL sample of a 1.00 M solution of CuSO4 is mixed with 50.0 mL of 2.00 M KOH in a calorimeter. The temperature of both solutions was 18.1 oC before mixing and 39.1 oC after mixing. The heat capacity of the calorimeter is 12.1 J/K. From these data, calculate ΔH for the process: CuSO4(1M)+ 2KOH(2M) →Cu(OH)2(s) + K2SO4(0.5M) Assume that the specific heat and density of the solution after mixing are the same as those of pure water and that the...
An aqueous ethanol solution (400 mL) was diluted to 4.00 L, giving a concentration of 0.0400...
An aqueous ethanol solution (400 mL) was diluted to 4.00 L, giving a concentration of 0.0400 M. The concentration of the original solution was _ M OA) 1.60 OB) 0.200 OC) 0.400 OD) 4.00 OE) 2.00 Gaseous mixtures A) are all homogeneous OB) can only contain molecules C) can only contain isolated atoms O D ) are all heterogeneous O E) must contain both isolated atoms and molecules
PLEASE HELP DUE IN 15 MINS
A 10 g of water was found to contain 10 mg of Hg2+ What is the concentration of Hg in ppm? (ppm = (mass of solute/mass of solvent)x1067 O A 1000 08.10 OC 100 OD 10000 OE 100000 A water solution has 146.0 g of HCl and 288 g of water. What is the mole fraction of HCl in this solution? [mole fraction of component = moles of component/total moles of all components] Please...
Hint: Change in temperature, AT = KX molality X Van't Hoff factor CA 1 M CscI OB 2 M CaCl2 OC. 1 M TI(NO3)3 OD 2 M Naci OE 2 M Sn(NO3)4 QUESTION 34 Which statement best describes the colligative properties of a solvent OA Depend on the nature of the solute OB Independent of the solute concentration c. Independent on the nature of the solute OD. Depend on the solute concentration OE. Both C and D QUESTION 35 Lowering...
145.0 moles of CaCO3 is dissolved in 5.0 L of water, what is the concentration of CaCo3? 20C940.6C12.8016 ASM OB 2.5M OC 1.5M 0,0.5M OE 1M QUESTION 29 A solution was made by dissolving 53.0 g of Na2CO3 in 500.0 mL of water. What is the molarity of this solution? (molarity - moles of solute/liters of solution) 1Na23, 6C12.8016 CA50M OR 2.0M OC 1.5M 0.0.5M OL 1.0M QUESTION 30 If 0.250 mol of NaOH is dissolved in 125.0 mL of...
1. A solution is prepared by dissolving 20.2 mL CH,OH in 100.0 mL HO at 25 degrees Celsius. The final volume of the solution is 118.0 mL. The densities of CHOH and H,O are 0.782 g/mL and 1.00 g/mL, respectively. For this solution, calculate molality, molarity, mole fraction of each component and % by mass of each component. 2. A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 258 torr....
6 A solution is made by dissolving 35.5 g of Ba(NO2)2 in 500.0 mL of water. Does Ba2+ have any acidic or basic properties? a O of 2 points earned 20 attempts remaining Does NO, have any acidic or basic properties? O of 2 points earned 20 attempts remaining Write the basic equilibrium equation that exists in solution с O of 2 points earned 20 attempts remaining What is the value of Kb for NO2-? The Ka of HNO2 is...
An aqueous ethanol solution (400 mL) was diluted to 4.00 L, giving a concentration of 0.0400 M. The concentration of the original solution was _ M OA) 1.60 OB) 0.200 OC) 0.400 OD) 4.00 OE) 2.00 Gaseous mixtures A) are all homogeneous OB) can only contain molecules C) can only contain isolated atoms O D ) are all heterogeneous O E) must contain both isolated atoms and molecules
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