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Which of the following is the best choice below for preparation of a .10M buffer solution required to maintain a ph of 3 and WHY? Why aren't others suitable?
HC3H5O2/C3H5O2 ka=1.34x10-5
HC2O4-/C2O4- ka=5.42x10-5
HNO2/NO2- ka=7.10x10-4
NOCI-/OCI- ka=3.00x10-8
what is the titer of the iodine solution of the .1137 sample of pure ascorbic acid 26.75 ml i2 required to reach starch
What is the density of a block of marble that occupies 350 cm3 and has a mass of 660 g?Answer in units of g/cm
A typical absorption due to stretching of the C=O bond is 1750 cm-1. (5.25 x 10 ^13 s-1). What is the force constant for the stretching vibration?
A 10.0 mL sample of aqueous H2SO4 requires 24.32 mL of 0.134 M NaOH to reach the endpoint. What is the molar concentration of H2SO4. First write the equation for the reaction.
Hydrogen bonding does not make a significantly large contribution to the overall stability of the DNA molecule. Explain
What is the height of the column that contains a solution of Sucrose (C12H22O11) with 21% weight percentage of Sucrose?
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
The solubility constant of TlBr is Ksp = 3.6 × 10^-6 and the solubility constant of AgBr is Ksp = 5.0 × 10^-13. Determine the range of NaBr volumes over which each solid precipitates.
Determine what given process is occurring when the color appears in the flame and an electron emits energy and it makes a transition to a higher energy orbital.
ammonia gas at 223degc and 90. atm flows into a reactor at a rate of 480. lmin. carbon dioxide at 223degc and 43 atm
The volume of the container is 2 ft 3 .Calculate the volume of gas in the container?
Which of the following substances have a standard heat of formation (?Hf°) of zero? Fe at 1200 °C Cl2(g) at 2 atm O2(g) at 25.0 °C and 1 atm C2H6(g) at standard conditions
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