How many grams of ethyl alcohol added to water
How many grams of ethyl alcohol, C2H5OH, must be added to 1.000 kf of water so that the solution will not freeze until -20 degrees C? For water, Kf= 1.86 degrees C/m.
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The normal boiling point of water is 100.0 degrees C and its molar enthalpy of vaporization is 40.67 kJ/mol. What is the change in entropy in entropy in the system in J/K when 39.3 grams of steam at 1 atm condenses to a liquid at the normal boilin
Detarmine the resulting Nitrate ion concentration when 95 ml of 0.592m potassium nitrate and 145.5ml of 1.770m calcium nitrate are combined
When Heated, KClO3 decomposes into KCl and O2. 2KClO3 arrow 2KCl+3O2 If this reaction produced 25.8 g of KCl, how much O2 was produced (in grams)
What is the net ionic equation for the precipitation reaction, if any, that occurs when an aqueous solution of Zn(CH3CO2)2 is mixed with an aqueous solution of CaCl2
Question: A 50.00-mL solution of 0.0350 M ammonia (Kb = 1.8 × 10-5) is titrated with a 0.0152 M solution of hydrochloric acid as the titrant. What is the pH at the equivalence point? (Kw = 1.0 × 10-14)
A mixture in a container at this temperature has a total pressure of 2.0 atm. The molar percent of N2O4 is 12.0% and NO2 is 88.0%. Calculate the reaction quotient, Qp.
It the activation energy for the 2Cl from Cl2 is 243.4 KJ what is the activation energy for the reverse reaction ("cl to Cl2)?
How much work is needed to lift a water molecule by 15 km? Pretend that the gravity force is the same throughout. Give answer in Joules, 2 significant digits.
Calculate the number of moles of B at each time in the table. 0 s mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s m
A physics student wants to cool a glass of Diet Cola (mostly water), initially at 27°C, byadding ice initially at -18°C. If there is 250g of Diet Cola in the glass, how much ice must they add so that the final temperature will be 0°C?
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