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A 0.0100 molal aqueous solution of a weak acid freezes at -0.0205 oC. Calculate the percent ionization of the weak acid, HA.
A 15.6 mL sample of vinegar, containing acetic acid, HC2H3O2, was titrated using 0.6216 M NaOH solution. The titration required 19.80 mL of the base. Assuming the density of the vinegar to be 1.0 g/mL, what was the percent (by mass) of acetic acid..
calculate the concentration in molarity of a NaOH solution if 25.0 ml of the solution are needed to neutralize 17.4 ml of a .312 M HCl solution.
The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
Maria wants to plant a small tomato garden in her yard. She bought 25 tomato plants, and she has read that ideally tomatoes are planted in a square grid
Consider a cylinder filled with air with a piston and spring arrangement on top. The external pressure is 1 bar, the initial temperature of the air in the cylinder is 25 C.
N2(g) + 3H2 (g) ---- 2NH3(g) a one liter vessel contain 1.60 mole NH3.800 mole N2 and 1.20 mole of H2. What is the equilibrium constant.
Find the change in the fraction of visibility for a person from planet Krypton with x-ray vision in addition to visible spectrum.
How much heat in is evolved or absorbed in the reaction of 2.28 grams of sodium ( Na) with water( H 2 O), express your answer in kilocalories?
A certain second-order reaction (B--> products) has a rate constant of 1.40×10^-3 M^-1*s^-1 at 27 Celsius and an initial half-life of 280s . What is the concentration of the reactant B after one half-life?
Equilibrium shift of the reaction and the pH of solution, 1. The pressure on each of the following systems is decreased from 5 atm to 1 atm. Which way does the equilibrium shift in each of the following systems?
Calculate the molecular weights of the 5 congeners listed above. What do the trends of log KOA, log KOW, and the negative log of water solubility vs. molecular weight indicate about the relationship between molecular weight and
The vapor pressure of water at 20oC is 17.5 mmHg. What is the vapor pressure of water (in mmHg) over a solution prepared from 258 g sucrose (C12H22O11) and 350 g water?
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