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what is the mole fraction of ethanol in an aqueous solution that is 46 percent ethanol by mass?
A proton in a linear accelerator has a de Broglie wavelength of 144 pm. what is the speed of the proton?
200g of magnesium phosphate and 250.0g of copper bromide react, how much copper phosphate will be produced?
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
A 493 mL sample of solution contains 33.2 g of CaCl2 Calculate the molar concentration of Cl in this solution
Consider the compound (Z)-3-hexene (B). Draw the bondline structures of the isomers of this compound in the manner requested. i) an isomer E that is the most reactive or reacts at the fastest rate during an addition reaction.
Determine what ventilation rate (minimum) in m3/hr will be essential to keep the carbon monoxide concentration in his garage from the dangerous level of 1600 ppmv? What is your answer in this case?
Rate of Initiated Radical Polymerization, What are the basic steps of initiated radical polymerization? Derive the rate expression of initiated radical polymerization
How many grams of dry NH_4Cl need to be added to 2.10 L of a 0.100 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.84? K_b for ammonia is 1.8 * 10^{-5}
Alcohols are less volatile than ethers of the same molecular weight, but the two classes of compounds have approximately the same solubility in water because:
If the molar enthalpy of water is 6.009 kJ/mol, how much energy is needed for 4.5 moles of ice to melt at STP?
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 720. mL at 25.0 oC and a barometric pressure of 755 torr.
You have 16 electrons, 16 protons, and 16 neutrons. You can combine them to make 8 Helium (He-4) atoms, 4 beryllium atoms (Be-8), 2 oxygen atoms (O-16), or one sulfur atom (S-32).
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