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Discuss what fraction of the initial number of the C-11atoms in a sample will remain after 81 minutes? Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes.
Synthesis of a Hetero cycle: Write down a detail mechanism for the formation of acid catalyzed hydrolysis of methyl benzoate (Esterification) and 2,3-dimethylquinoxaline.
How can determine the numbers of mg of polonium from an original sample of the 2.0mg will remain after the 8.0 years when the Po-208 is an alpha emitter with a half-life of 2.90years.
Determine the pH that will precipitate out the X^3+leaving the Z^3+ in the solution? Determine the pH that will precipitate out the Z^3+ leaving the X^3+ in the solution?
Identify the equilibrium concentration of the Pb+2 when PbSO4 is placed in the water. By using the chemical equation explain will the solubility of PbSO4 increase or decrease if the pH
Calculate the sign of the entropy of vaporization (DSvap)? (+ or -) Calculate the approximate ratio of DHvap to DSvap, given that the normal boiling temperature of water is 100oC?
If a watch draws 1.0 X 10-5 amperes continuously for 365 days, determine what mass of Hg(l) is produced when one kind of battery used in the watches contains mercury (II) oxide. As current is d
Discuss what will be the pH of the bath tub due to the above reaction after 30.0 minutes if the bath tub holds 100.0 liters of water and the battery is able to produce an average current of I=0.0960
Identify the amine when a Hofmann degradation of a primary amine forms an alkenes that gives butane and 2-methylpropanal upon ozonolysis and workup under reducing the conditions.
Calculate the molality, mole Friction and the molarity of the magnesium nitrate in the solution when an aqueous solution is 15.25% Magnesium Nitrite by mass and the density of the solution is 1.023
Determine the coefficient of H2O when the half-reaction below is balanced in the BASIC SOLUTION with lowest whole number of coefficients? On which side of the equation does water appear?
Determine the numbers of Seconds would be needed for the initial concentration of Fe 3+ to decrease to each of following values: 25% left, 12% left, 6.25% left, 3.125% left?
The main three beakers are placed in a sealable container where the beaker A is filled with the 100 mL of pure water, beaker B with the 100 mL of 1 moral salt, and the beaker C is filled with the 10
Determine the numbers of grams of sodium citrate should be added to the 1.00L of 0.297Mcitric acid to form a buffer solution with a pH or 3.17?
A water heater is operated by the solar power. If the solar collector has an area of 7.00m2, and the intensity delivered by the sunlight is 700 W/m2, explain how long does it take to increase the temp
A bar of gold (bar A) is in thermal contact with a bar of iron (bar B) of the same area and length. One end of the compound bar is maintained at Th =80.0°C while the opposite e
Calculate the boiling temperature of this liquid when the external pressure is only 0.100 atm. For a given liquid, DHvap is 10,000J/mol and DSvap is 100J/K mol.
Aluminum dichloride, AlCl3 Is and electron-deficient molecule. It has a tendency to produce the admire (a molecule made of two of the same units).
The active ingredient in the aspirin is acetylsalicylic acid, HC9H7O4 , a monophonic acid with a Ka = 3.3 X 10^ -4 at 25 degree Celsius.
When the sodium would require reacting with determine the numbers of moles of water in order to form the 8.2 moles of sodium hydroxide?
Determine the numbers of grams of aluminum chloride will be produced from the reaction of aluminum metal and the 2.0 moles of chlorine gas?
Determine the numbers of liters of hydrogen gas will be released where the density of hydrogen gas is 0.0899g/L if a 5 gram piece of sodium metal is reacted with the water.
Carbon dioxide is bubbled through water to produce hydrogen carbonate (carbonic acid). In order to form the 10.0 grams of carbonic acid, Determine the numbers of liters of carbon dioxide must be us
If the bathroom is 4 x 5 x 8 ft. Suppose 70% goes into the air and 30% dissolves in the water with no effect on the pH. What will be the concentration of the Chlorine gas in the water and in the ai
A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, withCl2 gas bubbled around the electrode and in the other beaker a platinum electrode is immersed in