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naturally occuring iodine is iodine-127. medically, radioactive isotopes of iodine-125 and iodine-130 are used. a)write the atomic symbol for each isotope. b)in what ways are the isotopes similar, and in what ways do they differ
How many grams of methane CH4 must be combusted to heat 1.15 kg of water from 24.0 C to 93.0 C, assuming H2O as a product and 100% efficiency in heat transfer?
What volume of hydrochloric acid solution of 0.25 M must be diluted to prepare 1.00 L of 0.040 M HCl and calculate Keq at this temperature for the given reaction 2 NOCl (g) W 2 NO (g) + Cl 2 (g) ( reaction is at equilibrium):
the heat capacity for the heat capacity of the calorimeter in calculating the enthalpy of reaction. What effect would ignoring this have on the calculation?
A solution is prepared by adding 80.0 mL of 0.090 M HBr to 130.0 mL of 0.50 M HI. Calculate the concentrations of all species in this solution. HBr and HI are both considered strong acids.
The acceptable limit for mercury in drinking water is 2ppb. Does this correspoond to mercury in its elemental form (Hg) or in its ionic form (Hg^2)
In a lab exercise 2.43 grams of sodium chloride NaCl is placed in a calorimetric cup containing 50 mL of water at 19 degrees celcius. After mixing the solution temperature is 16.5 degrees celcius.
Separation scheme for isolating benzoic acid, Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard
Deduce the structure of the molecule with the molecular formula C3H6 with a C13 NMR delta peak value of 27.8
Determine Ssys separately for the volume and temperature changes and show that ?Ssys = 0 for a reversible adiabatic process. If the expansion had instead occurred irreversibly against a constant external
With acid-catalyzed condensation of a molecule with two aldehyde groups that is suitable for forming 5- or 6-membered rings, are both carbonyls protonated right away at the same time
The temperature in the laboratory was 25°C, and the barometric pressure was 740 mmHg. At 25°C, the vapor pressure of water is 23.8 mmHg. Calculate the equivalent mass, EM, of the unknown metal anode. The student was told the metal was oxidized to ..
25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 C. The balloon is then cooled to 5.0 C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
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