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A NaCl solution contains 20.0% NaCl by mass and has a density of 1.15 g/mL. The molarity of the solution is: (hint: assume 1000. g of this solution)
What mass of C2H5OH should be added to 535 kg of the paraffin in formulating the mixture if the vapor pressure of ethanol at 35°C over the mixture is to be 8 torr? The vapor pressure of pure ethanol at 35°C is 100 torr.
A 0.456 gram sample of an unknown mono protic 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.
Given a barometric pressure of 756.0{rm mmHg} , calculate the pressure of gas sample (a) as indicated by the manometer
Suppose you have a Mo-W alloy that is 70 wt% W. Describe a process that would allow you to isolate an enriched mixture that is 80 wt% W. What would your yield be for a two-step process
how many grams of water are formed when 5.00 g of butanol combust with excess oxygen according to the reaction shown
Complete combustion of a hydrocarbon is a reaction where oxygen reacts with the compound to yield carbon dioxide and water. What is the correct balanced equation for complete combustion of CH4
30 mL of 0.25 M acetic acid are titrated with 0.05 M KOH. What is the pH after addition of 75 mL KOH
calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees Celcius and a pressure of 1.10 atm.
A reaction has a second-order rate law with kr=1.44 dm3 mol-1 s-1. Calculate the time required for the concentration of A to change from 0.460 mol dm-3 to 0.046 mol dm-3.
how many grams of ice at -20.5 degrees c can be completely converted to liquid at 16.3 degrees c if the available heat
Compute the amount of heat evolved in the oxidation of 32.0 grams of Fe at the temperature 25 oC and pressure 1 atm pressure ( ΔHfo(Fe 2 O 3 ,s) = -824kJ/mol)
Nonmetals like C,N,S and P are typically the central atom in a molecular compound rather than nonmetals such as O,F,H and Cl. One reason for this is
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