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An impure sample of Na3PO4 which is having 2.488g are dissolved in the water, and the PO43- ions are precipitated as Ca3(PO4)2, which is dried, filtered and found to weigh the 1.796 g. Calc
With a substantial stench the hydrogen sulfide gas is a poisonous gas like that of rotten eggs. It can be found in the natural gas like that used in the academic laboratories. The Hydrogen sulfide w
Determine the standard enthalpy change for the reaction that represents the breaking all the bonds in the gaseous C_6H_ 6 (g)?
Determine the number of moles of CO2 formed starting with the 3.80 moles of CO, if there is enough oxygen gas to react with the entire CO.
At 71.2°C a coffee-cup calorimeter contains the 65.0 g of water. At 20.2°C a 15.0 g piece of metal is placed in the calorimeter. The final temperature of the water and the metal is 69.3°
When making a complex ion, for a first row transition metal would you take the electrons out of the 4s or 3d first? It seems like since you fill 4s first you would not take them out until after all
Provide the outline for all the chair conformations of 2-tert-butylcyclohexanol. Find out the cis and trans stereoisomer and circle the least stable conformation and explain your choice.
When 50.0 mL of a sodium chloride solution and 100.0 mL of a silver nitrate solution were mixed in a constant pressure calorimeter, the temperature of the mixture rose from the 21.15 degrees C to 25
Estimate the number of grams of Aluminum formed in one hour by the electrolysis of molten AlCl3 if the electrical current is 10.0 A. (A=amps=C/s)
Estimate the value of pH? Determine the numbers of grams of KOH must be added to 0.500 L of the buffer to change the pH by the 0.15 units?
Calculate the theoretical yield of H2S in moles if the 4.0 molAl2S3 and 4.0 mol H2O are reacted according to the following balanced reaction when a possibly useful molar mass is Al2S3 =150.
Describe the wavelength and frequency of the radiation involved in the least energetic emission line in the Lyman series? Determine what quantum levels are involved in the emission line? Estimate t
The molar heats of vaporization and fusion of a certain substance are 7.31 kJ/mol and 3.63 kJ/mol and the melting points and boiling points are -161 degrees Celsius and -115 degrees Celsius
A 25.0 L container initially contains the oxygen gas which is having a partial pressure of 0.711 atm at the160 degrees C, plus 0.397 g of hydrogen gas.
Estimate the heat of formation of sucrose, knowing that the heat of combustion is -5645 KJ/mol. How can write the equation for the combustion of sucrose?
A gaseous compound containing hydrogen and carbon was analyzed and found to consist of the 83.65% carbon by mass. At 139 degrees C and 1.00 atm, when the density of this compound is 2.55g/L
Radium-226, which undergoes the alpha decay, has a half-life of 1600yr. Determine the numbers of alpha particles are emitted in the 1.9 min by a 6.3-mg sample of 226Ra?
Suppose the temperature is 25degrees Celsius and a partial pressure of oxygen is the 0.21 atm. If a current of 2.1 * 10^5 A is to be drawn from a zinc-air system, what volume of the air would requir
Determine the emf under actual operating conditions when the partial pressure of the oxygen is 0.21 atm.
Discuss how would change the OH group on the glucose to methyl, CH3, groups affect its solubility in water? Determine what would be a good solvent for this molecule? Why?
Determine the numbers of grams of acetylene must be burned to form the enough heat to raise the temperature of 1.00 gal of water by the13.2°C if the process is79.0% efficient and assume the dens
A coffee-cup calorimeter which is having 65.0 g of water at the 71.2°C. A 15.0 g piece of metal at 20.2°C is placed in the calorimeter. The final temperature of the metal and the water is 69
Determine the numbers of grams of water are produced in the following reaction when you start with the 15 grams of methane and 100 grams of oxygen.
Explain the change in energy of a neon atom when it emits a photon of this wavelength and the red color of neon signs is due to electromagnetic radiation of the 640 nm.
Determine in a detail that what volume of 0.250m ba (oh)2is required to totally react with the 100.0ml of a 0.500m solution of acid in ba (oh)2+ 2 hcl = bacl2 + 2 h2O