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Exactly 100 mL of 0.10 M nitrous acid (HNO2) are titrated with a 0.10 M NaOH solution. Calculate the pH for the following.
(a) the point at which 80 mL of the base has been added
(b) the equivalence point
(c) the point at which 105 mL of the base has been added
Which of the seven cations will be the hardest to detect (same anions as above), Why do you think this? If two or more are possible explain why.
Calculate the work (in kJ) when 2.20 moles of methane react with excess oxygen at 384 K: CH4(g) + 2O2(g) ? CO2(g) + 2H2O(l) Hint
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at -22.75 ? C and 485 Torr at 0?C. What is the normal boiling point of chlorine dioxide?
If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded to the central atom in each case, is the molecule polar, nonpolar, or does it depend on the identity of the outer atom?
Calculate ?H, q and w when 1.00 mol of helium at 5.00L and a temperature of 298.15K is expanded and heated simultaneously
The solubility of barium carbonate,BaCO3, is .0100 g/L . Its molar mass is 197.6 . What is the Ksp of barium carbonate?
An empty vial has a mass of 67.77 g. If the vial has a mass of 244.56 g when completely filled with liquid carbon terachloride (d = 1.59 g/cm3), what is the volume of the vial?
A mixture of gases with a pressure of 800.0 mm Hg contains 60% nitrogen and 40% oxygen by volume. What is the partial pressure of oxygen in this mixture?
Please note that NO3 has an odd number of electrons. But you must decide where the missing electron will be. Does the central atom violate the octet rule or do the oxygen atoms? Use formal charges to decide.
A beaker with 1.30×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M .
Which of the following alkenes can exhibit cis-trans isomerism?
a titration curve for H3PO4 (triprotic acid) and a mixture of three weak acids?
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