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How would you prepare a 25.0% water in ethyl alcohol solution using 100.0 ml of ethyl alcohol (the density of alcohol is 0.7893 g/ml)
determine the final volume of the gas If the gas ocupied 68mL, initally and determine the molarity of the solution
A 120-pound person uses 3 Calories per minute walking at a 20 min/mile pace. Approximately, how many miles would a person have to walk to burn off a scoop of ice cream (175 Calories)?
odium carbonate (Na2CO3) can be produced by heating sodium bicarbonate (NaHCO3). A student heats 5.128 g sodium bicarbonate to completely decompose the sample to sodium carbonate.
A certain carbon-hydrogen compound contains 89.94% C by mass and the remainder is hydrogen. What is the empirical formula
A 4.22g sample of CuS was added to excess HCl, and the resulting H2S was collected over water. What volume of H2S was collected at 32 degrees celsius
the third bulb has a volume of 30.0 mL and contains 4.96 atm of hydrogen. If the stopcocks (valves) that isolate all three bulbs are opened, what is the final pressure of the whole system in atm?
Use the appropriate standard reduction potential to calculate the value of K at 25 C for the reaction. NiO2(s) + 2Cl-(aq) + 4H+(aq) --> Cl2(g) + Ni2+(aq) + 2H2O(l)
Estimate how many barrels of fluid this tank could hold. Clearly state any assumption you must make to determine this and explain how you arrived at your assumption
Magnesium has three isotopes, Mg-24, Mg-25, and Mg-26. The percentage abundance of each in order is 78.70%, 10.13%, 11.17%.
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D. Substance E decomposes upon heating to give substance F and substance G. Heating substance H to 10..
Indicate the direction of polarity of each of the following covalent bonds by dragging the appropriate delta notation to each end of the bond.
A body consists of a right circular cone whose base is 12 in. and whose altitude is 16 in. A hole 8 in. in diameter and 4 in. deep has been drilled from the base. The axis of the hole coincides with the axis of the cone. Locate the centroid of the..
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