
Assume we have a kind of NaCl-water solution which contains n mol NaCl and the volume...
An aqueous NaCl solution contains 1.343x10* ppm NaCl. The density of water is 1.000g/ml. The density of the solution is 1.08 g/mL. The molar mass of NaCl is 58.44g/mol. Keep the correct number of significant figures. a) What is the molality of NaCl? b) What is the molarity of NaCl? c) What is the (mass/volume)% is unit of (kg/L)%? d) What is mass percent? e) What is mole fraction of NaCl?
At 18C the total volume of a solution formed from MgSO4 and
1.00kg of water fits the expression:
b is understood to be the molaitu of B/b. Calculate the
partial molar volumes of the salt and the solvent when in a
solution of 0.50 Mol/kg
1. at 18° C the total volume of a solution formed from MgSO4 and 1.00 kg of water fits the expression: V(cm2) 1001.21 +34.96 (b-0.070) where b is understood to be molality in terms of...
A calorimeter contains 29.0 mL of water at 14.0 ∘C . When 1.30 g of X (a substance with a molar mass of 61.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 27.0 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...
Calculate the volume in milliers of a 2.6 mol/L sodium chloride solution that contains 100 mmol of sodium chloride (NaCl). Be sure your answer has the correct number of significant digits. mL X 5 ?
3 pts Question 10 What is the molarity of a sodium chloride solution when 10.0 mol of NaCl are dissolved in 5.00 x 102mL of water? (Assume the solution volume equals the volume of water.) 20.0M 0.0200M 0.200M 2.00 M
A calorimeter contains 26.0 mL of water at 13.5 ∘C . When 2.50 g of X (a substance with a molar mass of 51.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 30.0 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...
A calorimeter contains 25.0 mL of water at 13.0 ∘C . When 2.40 g of X (a substance with a molar mass of 64.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 30.0 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...
A calorimeter contains 17.0 mL of water at 15.0 ∘C . When 1.40 g of X (a substance with a molar mass of 42.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 26.5 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...
1a. A calorimeter contains 34.0 mL of water at 15.0 ∘C . When 2.40 g of X (a substance with a molar mass of 62.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 30.0 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is...
A calorimeter contains 35.0 mL of water at 14.5 ∘C . When 1.80 g of X (a substance with a molar mass of 62.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 28.5 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...