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If the density of a 40.0 mass % solution of ethylene glycol in water is 1.0514 at 20 degrees celsius what is the molarity?
If a solution is made by mixing 20.0 mL 0.3 M NaCH3COO with 30 mL 0.4 M CH3COOH, calculate the pH of the solution? For acetic acid, K = 1.76 x 10-5.
What mass (in grams) of solid sucrose (C12H22O11) would need to be added to 2000 grams of water to make an ideal solution with a boiling point of 102.9°C? (Kb for water is 0.512°C/m)
Calibration and collection of equilibrium data are different experiment. Why could you use the calibration curve for getting equilibrium data?
1.when we say that something gives us energy what does that mean? what is a biological definition of energy?nbsp2.what
portion of the stock solution and dilute it to a total volume of 0.550L what will be the concentration of the final solution?
Calculate the final temperature of 34mL of ethanol initially at 20celcuis upon absorption of 739 J of heat. (density of ethanol =0.789g/mL )
If the cylinder then sits in the storage at 293 K for a long time, what is the entropy change of the universe (from the original unfilled state)?
A tightly sealed 5.0 L flask contains argon at 85.2 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas
C double bond O x2 for the first reaction and in the second reaction the CO has a tripple bond i've tried to do this several times and have gotten 166.5 kj/mol 81kj/mol and 48.5 kj/mol and all of them are wrong
an 8 g sample of a copper ore was dissolved in an acid solution and then reacted with NO3- from a KNO3 salt solution. it required 71.5 ml of a .155 M KNO3 solution to fully react the copper in the ore sample.
what is the volume of a sample of helium that has a mass of 6.36 times 10-3 g and a density of 0.17847 gl? answer in
A reaction vessel at 27 degrees C containsa mixture of SO2 (P = 3.10 atm) and 02 (P=1.10 atm). When a catalyst is added to the reaction 2SO^2(g) + O2 (g) = 2SO3 (g) takes place
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