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What is the melting point of a 20% by weight aqueous solution of a sugar whose molecular weight is 180 g/mol. The Kb for water is 0.51 (degrees Celsius*kg)/mol.
an empty flask has a mass of 123.4 grams. when the flask is filled with water, the mass is 211.6 grams. if 10 grams of zinc (density=7.14g/cm3) are added to the flask filled with water, what is the new mass of the flask?
The presence of the carbon-carbon double bond in eugenol can be tested using the bromine water test. write a balance equation for the reaction involved in this test?
A 50.00 mL sample of the solution (1L of 0.01000M solution requires 2.14g of potassium iodate), mixed with 2 g of potassium iodide and 10.00 mL of H2SO4 , is fully titrated with 38.50 mL of sodium thiosulfate. What is the concentration of the sodi..
The collision (frequency) factor remains the same, by how much an enzyme lower the activation energy of the reaction in order to achive 1 x 10 ^5 fold increase in the reaction rate
The molecular formula mass of this compound is 240 amu. What are the subscripts in the actual molecular formula
Determine All the products of acid-catalyzed dehydration of 2-pentanol. Show the mechanism for one of the products.
The only difference is the H+-ATP stoichiometry. Given that the pH on the outside of the xeno-mitochondrial membrane is 6.014,
Give the electron-domain and molecular geometries for the following molecules and ions (enter the appropriate number from thefollowing list).
The analysis of oil from a reciprocation aircraft engine showed a copper content of 8.53 μg Cu/mL. Calculate the 90% and 99% confidence intervals of the results if it was based on (a) a single analysis, (b) the mean of four analyses, (c) the mean ..
because of the slightly solubility 0.59mgl. of ba3po42 all of the ba2- and po43- do not precipitate from solution.a.
Suppose that you have 1.55grams of nitroglycerin( also known as nitroglycerine, trinitroglycerin, trinitroglycerine) in a 603.0 mili litres of steel container at 20 degree celsius and one atm pressure.
Draw electron-dot structures for the following molecules which contain atoms from the third row or lower: (a) SbCl3 (b) KrF2 (c) ClO2 (d) PF5 (e) H3PO4 (f) SeOCl2
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