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Calculate the pH of a solution that is 0.295 M in sodium formate (NaHCO2) and 0.205 M in formic acid (HCO2H). the Ka of formic acid is 1.77x10^-4.
After complete combustion, a 0.4946-g sample of the compound yields 0.7092 g of CO2, 0.4355 g of H2O, and 0.3812 g of P4O10. What is the empirical formula of the compound
A water sample is suspected to be contaminated by iron (III) ions. How could you determine if the sample is really contaminated
The pressure on a gas at -77 deg. C is doubled, but it's volume is held constant. What will the final temperature be in degrees C
Consider 4.40L of a gas at 365mmHg and 20degrees C . If the container is compressed to 2.60L and the temperature is increased to 30 degrees C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cy..
what is the molar concentration of phosphate ion in a 2.5 m aqueous solution of phosphoric acid
Is the wave behavior of light adequate to explain all phenomena? Give three examples of cases
Study the structures of the chlorophylls and carotenoids and predict the relative polarity of each set of pigments below
In the presence of large excesses of I^-1 ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00L of H2O2 reacts at 25C and 1.00atm pressure?
A water pipe fills a container that measures 189 cm , 307 cm ,272 cm in 97 seconds, What is the rate of flow in the pipe in liters per minute.
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
Provide structures consistent with the following molecular formulae and spectral data, and assign spectral peaks. Write your structures and tables on a sheet of paper.
If 465 mL of oxygen at STP is used in the reaction, what volume of CO2 measured at 37 degrees C and 0.973 atm, is produced?
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