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Balance the following equation and write in molecular as andnet ionic form. Identify as an acid-base reaction,precipitate reaction , an oxidation-reduction reaction, or as a combination of one of th
What would be the molarity of a saturated aqueous solution ofNaI prepared at 25 degrees C, assuming that the added NaI does notadd significantly to the volume of water?
Calculate the freezing point depression of liquid mercury caused by dissolved sodium if the mole fraction of sodium is0.0477. For Hg(l),
Calculate the osmotic pressure, freezing point and boiling point of seawater, which you can assume is a 1.08 msolution of NaCl(aq).
Given a saturated solution of of calcium carbonate , how many moles of calcium ion will remain in solution after the addition of3.16 * 10^-4 M of Na2CO3 at 25 degrees celsius? (Assume thepH does not
When a 0.3044-g sample of an unknown organic substance issimilarly burned in the same calorimeter, the temperature rises by3.72 °C. What is the energy of combustion per unit mass of the unknown
When benzeneand toluene are at the sme concentration te gas chromatogramproduces a peak height for benzene that is 3.74 times greater thanthat of toluene.
1.443 g sample of CaCO3 mixture is treated with Hydrochloricacid, evolving CO2 gas. After the reaction, the mixture has a massof 1.194 g.
The atomic mass of element X is 33.42 amu. A 27.80 g sample of X combines with 90.10 g of another element Y to form a compoundXY. Calculate the atomic mass of Y.
Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the followingpercent composition by mass: C: 44.4%; H: 6.21%; S:39.5%; O: 9.86%.
When conducting a simple experiment involving placing a small quantities of corn syrup in dialysis tubing and an equal amount of water in a second piece of tubing.
High altitude balloons used by the weather office to measureO3 levels in the atmosphere also use a similar idiometric titration where the iodine liberated is measured by back titration with sod
What percentage of hydrogen peroxide has been decomposed in Mixture #1 when 20.0 ml of O2 gas has been evolved? Asume your room temperature, 740 torr of pressure, and a density of 3% H2O2 of 1.00g/m
How many grams of KIO3 are required to make a potassiumiodate (KlO3) solution of 0.015 mol * L-1and how many mL of H2O are required?
A solution is prepared by dissolving 19.1 g ammonium sulfate in enough water to make100.0 mL of stock solution. A 15.00 mLsample of this stock solution is added to 55.00 mL of water.
7 million gallons per day (MGD) of a conservative substance, with concentration 13.5 mg/L, is released into a stream having an upstream flow of 20.0 MGD and substance concentration of 5.0 mg/L.
When performing sn2 chemistry- synethesis of 1-bromobutane from butan-1-ol, what would be the purpose of refluxing the RXN mixture for 30 minutes instead of just boiling and what would need modified
When 5.00mL of a sodium nitrate solution containing 17.04g/L ofsodium nitrate is added to 25.00mL of sulfamic acid solution containing 2.754g/L of sulfamic acid, the following reaction occurs:
Consider the reaction: CO2(g) + H2(g) -> CO(g) + H2O(g), for which Kc= 0.64 at 900K. If the initialconcentrations of CO2 and H2 are each 0.100 M, what will be the equilibrium concentrat
A drop of water has a volume of .05 mL. If the density of water is 1.0g/mL, how many molecules of water are present in the drop? The gram molecular weight is 18.016.
A solution of 0.2532 g of sulfamic acid and 100ml H2Oand a solution of 0.30g sodium nitrate acid in 50ml H2Owere used to produce nitrogen gas. 10ml of the sulfamic acid solution was mixed with 5ml of
The purity of a sample containing zinc and weighing 0.198 g is determined by measuring the amount of hydrogen formed when thesample reacts with an excess of hydrochloric acid.
50 mL of HNO3 requires 35.50 mL ofBa(OH)2 0.150 M to neutralize it. Determine the molarity of the acid solution. Write the adjusted chemical equation.
An enzyme catalyzed reaction is carried out in a 50 mLsolution containing 0.1 M TRIS buffer. The pH of the reactionmixture at the start was 8.0. As a result of the reaction, 00002mole of H+ were pro
is collected over waterat 27 C in a 2.00 L vessel at a total pressure of 760 torr. (The vapor pressure of H2O at 27 C is 26.0 torr.) How manymoles of KClO3 were consumed in the reaction?