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Write down all species (including states) that are present in signicant amounts when the following solids are added to water.
(a) Ammonium chloride
(b) Calcium hydroxide
(c) Copper (I) bromide
(d) Sodium phosphate
(e) Sodium hydroxide
(f) Naphthalene
(g) Lead (II) chromate
(h) Cadmium (II) sulde
Heptane can appear harmless, but when ignited, it explodes violently. What is the first law of thermodynamic?
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.72-M NaOH is added to 490. mL of each of the following solutions. a) water pH before mixing
You dissolved three salts in the previous lab: NaCl, CaCl2, and AlCl3-6H2O. Which of these three (on a per gram basis) will have the greatest impact on the freezing point when added to water
a buffer solution is prepared by adding 15.0 g nac2h3o2 and 12.5 g acetic acid c2h4o2 to enough water to make 500.0 ml
Pyridoxine contains 11 hydrogen atoms, 8 carbon atoms, 3 oxygen atoms, and 1 nitrogen atom. What is the chemical formula for pyridoxine
How many milligrams of sodium ion are in 250 ml of a 3.6%(m/v) solution of sodium phosphate, Na3PO4
To convert this into a buffer having a pH of 9.3380, how many grams of KH2BO3 (M.W. 99.926) should be added to the solution?
A sample of pure NO2 is heated to 334 degree C at which temperature it partially dissociates according to the equation 2NO2(g)-->2NO(g)+O2(g)
A solution of 48.6% H2SO4 by mass has a density of 1.39 g/cm3 at 293 K. A 23.2 cm3 sample of this solution is mixed with enough water to increase the volume of the solution to 99.8 cm3. Find the molarity of sulfuric acid in the obtained solution.
the coinage metals -- copper silver and gold -- crystallize in a cubic closest packed structure. use the density of
For the following reaction: Fe(OH)2 + H3PO4 ----> Fe3(PO4)2 + H2O [Unbalanced] In a reaction, 3.20 g of Fe(OH)2 is treated with 2.50g H3PO4. If 3.62g of Fe3(PO4)2 is produced in the reaction, what is the percent yield for the reaction?
Evaluate reversibility of a process where an ideal monoatomic gas is first slowly compressed 10-fold by a gradually increasing external pressure (gas remains in thermal equilibrium with the surroundings)
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