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The ionization constant for the weak acid HA is 4.0 x 10^-8. Calculate the equilibrium concentration of H+, A- and HA in a 0.050 M solution of the acid.
1. my doctor only measures medicine in scruples. (old unit of mass) If he prescribed 0.382 scruples of medicine, how many milligrams should I ask for at the pharmacy? 1ounce=437.5 grains 1 scruple=20 grains 1ounce=28.35
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2
Suppose the reaction Ca3(PO4)2 + 3H2SO4 ------ > 3CaSO4 + 2H3PO4 is carried out starting with 103 g of Ca3(PO4)2 and 33.7 g of H2SO4. How much phosphoric acid (H3PO4) will be produced?
A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 in this solution is molar
An ionic equation has 2H+(aq) on the left side and H2(g) on the right. Are these species spectators? Explain
Identify the major type of attractive force between particles of each of the following substances: a) HCl; b) MgF2; c) PBr3; d) Br2; e) NH3.
Identify the acid and base on the left side of following equations and identify their conjugate species on the right side. (Type your answer using the format (NH4)2CO3 for (NH4)2CO3, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-.)
A gas expands and does P-V work on the surroundings equal to 323 J. At the same time, it absorbs 145 J of heat from the surroundings.
How many mL of 0.425 M NaOH are needed to react completely with 25.0 mL of 0.250 M Fe Cl3 solution? FeCl3 aq + 3NaOH arrow to Fe(OH)3 aq +3NaCl aq
Identify the original liquid and write a structure for the solid derivative. After identifying the unknown liquid, can you indicate what the structure of the precipitate obtained on reaction with bromine might be?
Are these analyses correct? (i.e. are the charges balanced?) What partial pressure of CO2 would be at equilibrium with this water
The elements contained in acetylsalicyic acid are hydrogen, carbon, and oxygen. The combustion of 3.000 g of the pure compound yields 1.200 g of water and 3.72 L of dry carbon dioxide, measured at STP
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