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Four beakers containing potassium nitrate dissolved in water are allowed to evaporate to dryness. Beakers 1 through 4 contain 2.3, 1.91, 5.985, and 0.52 g of dry potassium nitrate respectively. How many moles of potassium nitrate were recovered after the water evaporated?
A solution is prepared by mixing 0.0300 mol CH2Cl2 and 0.0500 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor
How many kJ of heat are needed to raise the temperature of 2kg of water from 29 degrees C
Compute ΔHo fusion and ΔSo fusion for this substance If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K..
The physical separation of crude petroleum into fractions is based on boiling point differences among components present
Calculate the volume of approximately 37 wt% HCl that should be added to 1 L of distilled water to produce 0.1 M HCl
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
Gilman reagents will react with alkyl halides to form carbon-carbon bonds. Outline a synthesis of Ph2CuLi and use it to make butylbenzene isomer free. What other way can you make butylbenzene isomer free?
some species of bacteria can oxidize nitrite to nitrate using the energy released by the transfer of electrons to oxygen to drive ATP synthesis. Given the E values below, calculate the max yield of ATP per mole of nitrite oxidized.
one day you notice that the outside temperature increase by 16 degrees Fahrenheit between your early morning jog and your lunch at noon. what is the corresponding change in temperature in the Celsius and Kelvin scales?
Define or give examples for the following terms using words and equations as necessary. If a symbol exists, write it along with metric units (kg, m, s, J, N, kJ, kPa, C, K, kmol, etc.)
Assuming that prior experiments have shown the single-step extraction removes only 71.0 % of the ethanol, what is the mass of ethanol in your original unknown?
what is the molarity of a solution of silver perchlorate agclo4 if 3.2 moles of silver perchlorate is dissolved in 1.5
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