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Consider the reaction: 200.00mL of 0.125M Pb2+(aq) is mixed with 400.00mL of 0.175 M Cl- (aq). PbCl2 forms. What's the limiting reactant and how many grams of PbCl2 forms and precipitates out of the
An aqueous solution is made by dissolving 2.569 grams of potassium phosphate (K3PO4) diluting to exactly 500.00mL in a flask with water.
Consider a region of the atmosphere of volume 25L, which at 20C contains about 1.0 mol of molecules. Take the average molar mass of the molecules as 29g/mol and their average speed as about 400m/s.
You take 20.0 g of a sucrrose (C12H22O11) and NaCl mixture and dissolve it in 1.0 L of water. The freezing point of this solution is found to be -0.426Celcius).
An iron ore sample contains Fe2O3 together with other substances. Reaction of the ore with CO produces iron metal: Fe2O3 (s) + CO(g) -> Fe(s) + CO2(g)a. Balance the equationb. Calculate the numbe
If you take 1000.steps per day to the west with each step coverting 0.675m,how many days will it take to get to California? Assume the distance to California is 2.22 x 10 to the 6 power or exponent
In a later scene he and an unscrupulous guide play catch with the idol. assume the volume of the idol is about 1.0L. If it were solid gold, what mass would the idol have? Is playing catch with it pl
If about 2.55 gallons of oil spills into the ocean per second, the first traces of color from an oil slick on the surface of water appear when the film reachs a thickness of 0.000150 mm and a dark s
Solid carbon dioxide goes directly from a solid to a gaseous state at -78 degrees Celsius (change of Hsub 25.2 kj/mol) calculate the amount of heat required for sublimation of 28.5 g of dry ice.
A mixture of oxygen and hydrogen is analyzed by passing it over hot copper oxide and through a drying tube. Hydrogen reduces the cu0 according to the reaction.
The bioreactor is a closed, rigid vessel into which liquid medium containing 10 mmol glucose (C6H12O6) and an excess of ammonium sulfate is added.
5 grams of water are evaporated: converted to gaseous water vapor. Is the mass of the water less than, equal to, or greater than 5 grams and do the water particles remain the same in size when wate
An average human body produces about 10 MJ of heat each day through metabolic activity. If a human body were an isolated system of mass 65 kg with the heat capacity of water, what temperature rise w
If a man stands on a scale while totally submerged in water at 30 degrees C (specific gravity=.996) and the scale reads 44N, what is the volume of his body in liters.
Two Evacuated bulbs of equal volume are connected by a tube of negligible volume. One bulb is placed in a 200 K constant temperature bath and the other in a 300 K constant temperature ath, and then
Determine the weight in grams of sodium dihydrogen phosphate (NaH2PO4.H2O; FW = 138.01) and disodium hydrogen phosphate (Na2HPO4; FW = 141.98) needed to prepare 1 L of a standard buffer at pH 7.00 w
Derive the relation between the critical constants and the Dieterici equation parameters. Show that Zc = 2e-2 and derive the reduced form of the Dieterici equation of state. Compare the van der Waal
Vaillin (used to flavor vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest amount. The threshold limit is 2.0x10^-11 g per liter of air.
It is only through the study of isolated and purified elements and their combination that one can observe characteristic properties and make cause and effect relationships.
If the chemical reaction has occured by a mechanism that involves more than one step. What is the reaction occurs by the given mechanism?
Express the work of isothermal reversible expansion of a van der Waals gas in reduced variables and find a definition of reduced work that makes the overall expression independent of the identity of
The human body on average contains 6 liters of blood. If 20 drops are equal to 1 milliliter, how many drops of blood are in the average human body?
A 1.0 ounce piece of chocolate contains 15 of caffeine, and a 6.0 ounce cup of regular coffee contains 105 of caffeine.How much chocolate would you have to consume to get as much caffeine as you wo
Suppose you have two 100mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each isde.