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In a 0.400 mol/kg aqueous solution of sucrose, the molarity of sucrose is 0.282 mol/dm3 and the density of water is 0.998 g/cm3 at 20oC and 1 atm. Estimate the osmotic pressure of this solution.
a certain element has only two naturally occurring isotopes one with 18 neutrons and the other with 20 neutrons. the element forms 1 charged ions when in ionic compounds. predict the identity of the element. what number of electron does the 1 char..
The bond angles in H3O+ are:? a) slightly less than 109.5o b) exactly 109.5o c) slightly less than 90o d) exactly 90o
Identify the cation and anion. Express the answer in terms of the formula of the salt. A green powder dissolves in water and gives a pure white precipitate with acidic AgNO3. When the solution is heated with H2O2 and NaOH, it turns a yellow color,..
Calculate the equilibrium pressure of the H2O vapour at both 0oC and 25 oC. The value of ?H is 522.0kj/mol, why may be assumed constant over the temperature range of interest.
Using the equation below assume we want to use 2.3 g of Fe(no3)3 in our experiment. how much NaOH will be needed for a complete reaction?
A 5.0 L sample has a pressure of 5.0 atm. What is the volume of the anesthetic given to a patient at a pressure at a pressure of 1.0 atm?
What is the oxidation number of chlorine atom in Clo- c)What is the oxidation number of manganese in MnO2
napthalene lowered the freezing point of the solvent by 0.780K. Calculate the molar mass of the compound. [Kf of napthalene= 6.94 K*kg/mol]
Is the reaction exothermic or endothermic. Does the reaction lead to an increase or decrease in the disorder of the system
The pI can be estimated fairly accurately (within 0.1 or 0.2 pH units) from the pK values of all the proton dissociable groups in the peptide. Using pK values from the table at the right, estimate the pI value of the following hexapeptide
Write the expressions for Kc for the following reactions. a. 2O3(g) --> 3O2(g) b. Ti(s) + 2Cl2(g) --> TiCl4(l) c. 2C2H4(g) + 2H2(g) --> 2C2H6(g) + O2(g)
At 55.0C, what is the vapor pressure of a solution prepared by dissolving 75.8 g of LiF in 265 g of water?
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