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- You dissolve 0.300 g of an unknown organic molecule in 10.0 g of camphor . The freeing point of the camphor decreases by 3.07 degrees Celsius. What is the molar mass of the unknown compound? Kf= 39.7oC/m 94.0 g/mole 97.0 g/mole 194 g/mole 47.0 g/mole 388 g/moleThe amount of urea in ppm [parts per million] present in an aqueous solution containing 45 % by mass of solvent is ______ 8.18 X 10 to the power of 5 space end exponent p p m 1.22 X 10 to the power of 6 space end exponent p p m 4.50 X 10 to the power of 5 space end exponent p p m 5.50 X 10 to the power of 5 space end exponent p p mH2SO4(aq)+NaOH(s)→H2SO4(aq)+NaOH(s)→ (neutralization of both acidic protons) Express your answer as a chemical equation. Identify all of the phases in your answer.
- What is the molar fraction of glycine in an aqueous solution whose concentration is 0.140 molkg-1. Data: Mass H2O = 1 kg; M.M. H2O = 18.01 gmol-1.Calculate for the mass of glyceraldehyde (C3H6O3) needed to prepare 250 mL of each of the following solutions?a. 78% (w/v)b. 1.65 Mc. 890 ppmThe partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.
- Saturated aqueous sodium chloride (d = 1.2 g/mL) is added to the followingmixtures in order to dry the organic layer. Which layer is likely to be on thebottom in each case?a. Sodium chloride layer or a layer containing a high-density organic compound dissolved in methylene chloride (d = 1.4 g/mL)b. Sodium chloride layer or a layer containing a low-density organic compound dissolved in methylene chloride (d = 1.1 g/mL)For the ppm of K2Cr2O7 why did you multiply by 10^6? What is the 10^6 suppose to represent or mean?A U-Tube is divided into left and right compartments by a membrane that exclusively allows water to pass through but not any dissolved particles. Initially, the water level is equal on both sides. Then. the following compounds are added to each compartment: Left compartment: 0.50 mol calcium nitrate and 1 mol of glucose(C6H11O6) Right compartment: 0.75 mol maltose (C12H22O11) and 0.75 mol AlPO4 Select the one statement below that is TRUE. a)Water will stop flowing across the membrane b)The right side compartment will have a higher osmotic pressure c)There will be no change in the water level on either side because water always flattens out d)The water level on the right side will be higher e)The water level on the left side will be higher
- Estimate the osmotic pressure associated with 24.5 g of an enzyme of molecular weight 4.21 x 10-6 dissolved in 1740. mL of ethyl acetate solution at 38.0°CWhat is Brownian motion, and what causes it?15.00 ml of a H3PO4 solution required 21.45 ml of 0.125 N NaOH fpr complete neutraliztion. calculate the normality and the morility o the phosphoric acid solution.