Calculate the mole fraction of formaldehyde, H2CO, in a solution that is 38.2 % formaldehyde and 61.8% water, by mass. Take the molar mass of formaldehyde as 30.026 g/mol and that of water as 18.015 g/mol.
Calculate the mole fraction of formaldehyde, H2CO, in a solution that is 38.2 % formaldehyde and...
Calculate the molality and mole fraction of a solution made by dissolving 8 gm of (Molar mass of NaOH = 40 g / mol Q.2 pure NaOH in 200 ml of water
3. (3 pts) Formaldehyde (H2CO) is sold as a 37.0% by weight solution in water. a. Write out both the mathematical definition of weight percent and the mathematical definition of molality, below. How are they similar? How are they different? b. What is the molality of formaldehyde in this solution? c. If the density of the solution if 1.09 g/mL, what is the molarity of formaldehyde? d. You dilute 10.0 mL of the concentrated formaldehyde solution to 200.0 mL with...
Calculate the heat of reaction for the conversion of 1 mole of glucose into formaldehyde, given the following thermochemical data: H2CO(g)+02(8) Co2(s)+H20(g) AH Comb-572.9 kJ/mol 6C(s)+6H2(g)+302(8)» CH120(s) AH=-1274.4 kJ/mol [C)+0,()Co,() AH-393.5 kJ/mol H()0() ,H20(g) AH=-285.8 kJ/mol What is the AHn for the reaction below? - бн, со (3) Сон20, (3) kJ
Calculate the mole fraction of Fe when iron(III) chloride hexahydrate is dissolved into 192.404 deionized water. ( The molar mass for water is 18.00 grams and for iron is 55.85 grams.) Mass of iron chloride hexaĥydrate is 270.295 g/mol.
please help me calculate the mole fraction for this question!! MALL HELE PRESE BE Mole fraction of KCl in a solution containing 10 g of it (i.e. KCI) (atomic mass of KCL = 74.5) in 100 g of water is
Question 18 An aqueous solution of glucose (C6H1206) contains 22% glucose by mass. Calculate the mole fraction of glucose. Molar Mass of glucose = 180 g/mole; Molar Mass of water = 18 g/mole 0.122 0.0274 O 0.973 1.00
Calculate the heat of reaction for the conversion of 1 mole of glucose into formaldehyde, given the following thermochemical data: H2CO(g)+0,(8)Co,(g) + H,0(g) AH Comb-572.9 kJ/mol 6C(s)+6H,(g)+30,(g)CH1206(s) AHP-1274.4 kJ/mol [c)+0,()Co,] AHP-393.5 kJ/mol H, (g)+0,) AH-285.8 kJ/mol H,0(s) What is the AHn for the reaction below? CH120)6H.CO(g) SUBMIT ANS
D Question 40 15 pts Calculate the mole fraction, molarity and molality of NH3 if it is in a solution composed of 30.6 g NH3 in 81.3 g of H20. The density of the solution is 0.982 g/mL and the density of water is 1.00 g/mL. (The molar mass for NH3 is 17 and 18 for H20). Answers are to be shown to 3 significant digits (X.XX or 0.XXX or XXX) 1. The mole fraction for NH3 is 2. The...
1e. An aqueous solution has a mole fraction of solute of (4.73x10^-2). The density of the solution is (1.1400x10^0) g/mL and the solute has a molar mass of (8.020x10^1) g/mol. What is the Molarity of solute of this solution? 1f. At an unknown temperature a solution made of (7.740x10^0) g of a non-volatile solute dissolved in 100.0 g of water has a vapor pressure of (5.51x10^1) mm Hg. What is the vapor pressure of pure water (in mm Hg) at...
4a Calculate the molarity of an aqueous solution of sodium perchlorate with a solute mole fraction of 0.081 and a density, ρ = 1.078 g/mL. Report your answer to THREE significant figures. 4b Calculate the molarity of a 41.2% by mass aqueous solution of copper (I) sulfate with a density, ρ = 1.177 g/mL. Report your answer to THREE significant figures. 4c Calculate the mole fraction of the solute of a 4.211 m aqueous solution of cadmium (II) bromide with...