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The elements of Si, Ga, As, Ge, Al, Cd, S and Se are all used in the manufacture of various semiconductor devices. Write expected electron configurations for these atoms.
Calculate the base to acid ratio needed to make a pH 3.80 buffer from acetic acid (Ka = 1.8 x 10-5) and sodium acetate.
what is the mol fraction na2so4 in a solution which is 11.5 by weight na2so4 molar mass na2so4 142.06 gmol and h2o
Draw the structural formula of 3,4-diethyl-3-hexene. If more than one isomer of this compound exists, then both isomers must be drawn
Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving .8 mol of NaOH in .50 L of 1.0 M H3PO4
A sample of fluorine gas occupies 855 mL at 710 mm Hg and 1550C. What is the mass of the sample?
calculate the amount of work produced on the system and by applying the first law of thermodynamic calculate the amount of q of heat transfered from the system to the enviroment,
A gas is compressed from 68.2 L to 8.0 L at 0.70 atmospheres? In addition a total of 3300 J of heat are gained from warmer surroundings. What is the change in internal energy in kJ
What is the freezing point of a solution of 8.69 grams of the electrolyte sodium acetate NaCH3COO dissolved in 15 grams of water?
the system h2g i2g ?? 2 hig is at equilibrium at a fixed temperature with a partial pressure of h2 of atm a partial
A 30.00 mL volume of a weak acid, HA, (Ka = 3.8 x 10^-6) is titrated with 39.00 mL of 0.0958 M NaOH to the equivalence point. What is the pH of the analyte solution before any base is added to it
Saturated Calomel Electrode || Titration Solution | Ag (s) Calomel Electrode: E=0.241V For Ag+ + e- ---> Ag(s), E0 = 0.79993 V. AgI is Ksp = 8.3 × 10-17. What it the volts at equivalence point when Ve=30.00mL
For a given reaction, which of the following statements can be made about the value of the equilibrium constant? It always remains the same.
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