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What is the osmotic pressure of a 0.100 M aqueous solution of sucrose at 25 degrees C. Please explain
The vapor pressure of ethyl ether is 7.87 in. Hg at 2°C; 11.8 in. Hg at 12°C; 27.5 in. Hg at 32°C; 29.9 in. Hg at 35°C; 39.3 in. Hg at 42°C. What is the normal boiling point of ethyl ether
Nickel nitrate and potassium carbonate react to form nickel carbonate and potassium nitrate. How many milliliters of 0.55M Ni(NO3)¬2 are needed to react with 85 mL of 0.25M K2CO3?
The pH of the solution at the equivalence point, The pH of the solution after 40.0 mL of HCl are added.
The equation for the reaction is CaCO3(s) + 2HCl(aq) arrow CaCl2(aq) +H2O(l) +CO2(g) The excess HCL (aq) is titrated by 6.45 mL of 0.125 M NaOH(aq). Calculate the mass percentaageof CaCO3(s) in the sample.
a chemist weighed out 5.25 g of a mixture containing unknown amounts of baos and caos and placed the sample in a 1.50-l
Crude gunpowders often contain a mixture of potassium nitrate and charcoal (carbon). When such a mixture is heated until reaction occurs, a solid residue of potassium carbonate is produced.
Determine which H atom transition (ninitial,nfinal) was responsible for the emission of a photon with a frequency of 6.91 x 1014 Hz.
What hybrid orbital would be expected for the central atom in each of the following: Draw the molecular structure of these compounds and label Ï? and Ï?bonds.
The delta H sub f of FeBr3 is -269 kJ/mol and the delta H for the reaction 2Fe (s) + 3Br2 (g)----> 2Br3 (s) is -631 kJ/mol . Calculate the Delta H of evaporation of Br2 (l) which is a liquid at 25 degrees Celcius.
Suppose you want to heat air in your house with methane (CH4). Assume your house has 275 m2 of floor area and that ceiling is 2.50 m from the floor.
We wish to prepare a buffer of pH 10 using common laboratory reagents. How many mL of 6M HCl would we have to add to a solution prepared by adding 100 mL of 15M NH3 to 200 mL of water?
Explain Solid State Chemistry, 1) Write the balanced chemical equation for Fe2O3+2Al?2Fe+Al2O3 using the lowest possible whole number coefficients.
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