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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?
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?
A bacterial culture isolated from sewage produced mL of methane,ch4 at 30C and 749 mmHg. What would the volume of methane at standard temperature and pressure 10 C 760 mmHg.
Calculate the standard potential for this reaction. Normally, X is Fe. Here it is some unknown metal, allowing for somewhat random values for ΔGo.
A pressure of 0.31 atm of NO2 is introduced into a container and allowed to come to equilibrium. What are the equilibrium partial pressures of NO(g) and O2(g)?
After the reaction comes to equilibrium, an additional 1.00g of O2(g) is added to the system. What is the expected partial pressure of SO2(g) then?
A mixture of gases contains 0.290 mol CH4, 0.250 mol C2H6, and 0.270 mol C3H8. The total pressure is 1.60 atm. Calculate the partial pressure of the gases.
A 325 mL sample of solution contains 25.3 grams of CaCl2. Calculate the molar concentration of Cl- in this solution.
A 45.5g sample of copper at 99.8 Celsius is dropped into a beaker containing 151 g of water at 18.5 Celsius. What is the final temperature when thermal equilibrium is reached?
If an air bubble is originally trapped in the buret tip but disappears during the titration, how does this affect the calculation of the ascorbic acid in the sample of juice? Explain.
A 3.00 L helium balloon, initially at STP, floats up to an altitude of 10 km, where the pressure is 200.0 torr and the temperature is -45°C. What is the balloon's new volume?