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A graduated cylinder contains 129 of water. A 17.0 piece of iron (density = 7.86 ) and a 21.0 piece of lead are added. What is the new water level in the cylinder?
The ligand, hydrotris( 1-pyrazolyl)borate is commonly used in biomimetic complexes. Draw out the ligand. Why is this a useful ligand for bioinorganic model complexes?
Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if neither reactant is present in stoichiometric excess.
How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 3.0-cm rainfall of pH 2.00 over an area of 100 square kilometers?
Calculate the mass of propylene glycol that must be added to 0.340 of water to reduce the vapor pressure by 2.86 at 40 ( at 40 ).
The water level in a graduated cylinder initially at 224 rises to 287 after a piece of lead is submerged. What is the mass in grams of the lead?
Is the solution saturated or unsaturated? what would happen if: (a) more KBr was added to the solution; (b) the tempurature was lowered to 0C?
A chemist prepares a solution by dissolving 2.228 g of NaNO3 in enough water to make 200 mL of solution. What molar concentration of sodium nitrate should appear on the label.
When separated from a water solution cuso4 forms a hydrate with 5 water molecules per formula unit. If 36 g of anhydrous cuso4 are dissolved in water, why mass of the hydrate could be recovered fro
The flask was then shaken until the solution was uniform. A 45.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
Calculate each of the following for the reaction that occurs when 56.0mL of 0.50M barium chloride solution are mixed with 78.0mL of 0.75M sodium carbonate solution.
A solution is prepared by mixing 62.0 mL of 5.00 M HCl and 30.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
The total volume of hydrogen gas needed to fill the Hindenburg was 2.0x10^8 L at 1.0 atm and 25°C. How much heat was evolved when the Hindenburg exploded, assuming all of the hydrogen reacted. H
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n=7 state to the n=1 state.
A cylinder with a moveable piston contains 0.553 mol of gas and has a volume of 253 mL. What will its volume be if an additional 0.365 mol of gas is added to the cylinder?
The enthalpy of vaporization of ethanol i 43.5 kj/mole at its normal boiling point of 352 k. using avalue of the molar heat capacity of liquid ethanol of 111.46 j/k/mol, calculate the enthalpy of v
A 5.0 dm3 sample of oxygen at a pressur of 200 kpa and 2.0 dm3 sample of nitrogen at a pressure of 500 kpa are introduced into a 2.5 dm3 vessel. What is the total pressure in the vessel?
A sample of zinc metal reacts with an excess of hydrochloric acid (hydrogen chloride) via a single displacement reaction. All of the zinc reacts, and the hydrogen gas is collected over water at 17C;
You dissolve 650.0 g of sugar (C12H22O11) in 726 mL of water. The density of wat is 1.00 g/mL. Calculate the molarity of the solution.
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2? Molar Mass SO2 64.1 gmol.
The reaction is commenced with initial concentrations [A] = 0.2 M, [B] = 0.2 M and [C] = 0.2 M. In what direction does the reaction occur?
The electrolysis of molten A12O3 at 980 ºC is used to produce metallic aluminum. A current of 360 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms pe
Calculate the number of calories needed to increase the temperature of 50.0 g of copper metal from 21.0 degrees C to 75.0 degrees C. Given, the specific heat of copper is 0.382 cal/g x degrees C.
The two reactions involved in quantitatively determining the amount of iodate in solution are: What is the stoichiometric factor, that is the number of moles of Na2S2O3 reacting with one mole of KIO3?