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State a solution with density of 0.935 g/mL contains 37.8% H2CO, 15.0% C2H5OH, and 47.2% water by weight. Define is the molarity of H2CO?
If calcium and chlorine combine to form a compound, which of the following terms describes the types of bonds found in the compound
c3h8g 5o2g 3co2g 4h2ol ho -2220 kjmolpropane is often used for gas grills and is typically purchased by filling a
the osmotic pressure at 20.0 degrees C is 3.62x 10^-3 atm. What is the molar mass of the protein hemoglobin?
"Washing soda" (sodium carbonate) may be used to "soften" water by removal of certain ions that would otherwise react with common soaps. When the "hardiness" is due to calcium ion, the "softening" process may be represented as
Find the capacity factor for solutes with each of the following partition coefficients, K. (Note: capacity factor is also called retention factor, capacity ratio, or partition ratio.)
How many milliliters of 3.4 M NH4Cl must be added to 250 mL of 0.23 M NH3 to obtain a buffer solution having pH=9.40
The reaction 2NO ? N2 + O2, has a rate constant of 3.6 x 10^-2 M^-1 s^-1. When [NO]= 2.8 x 10^-3 M, what is the rate of change in M.s^-1 for N2?
what are amino-acid trna synthetase enzymes and why are they important in the biology of cells? how many different ones
a reaction of 1 liter of chlorine cl2 and 3 liters of fluorine gas f2 yeilds 2 liters of a gaseous product. all gases
what is the percent yield of a reaction in which 260. g phosphorus trichloride reacts with excess water to form aqueous
A solution contains 2.0*10^-3 M Pb^2+ and 1.0*10^-4 M Cu^+. I^- is added to the solution little by little, will CuI (Ksp=1.0*10^-12) or PbI2 (Ksp=7.9*10^-9) precipitate first? Determine the concentration of I^- required to commence precipitation o..
Ethers can be prepared by SN2 attack of an alkoxide ion on a alkyl halide. Suppose you wanted to prepare cyclohexyl methyl ether, shown below, using the SN2 reaction
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