I was given lab data on a sample of organic chemistry, and I need help dating it. The data is as follows: 1. the delta value for the 13-C (carbon 13) = -7.2 2. 14-C (carbon 14) activity = 8.16 dpm/g I need help calculating the age of this carbon, and if possible, corrected for isotopic fractionation.
Finding Eh of Uranium Isotopes
I need to find the Eh (electromotive force) of this solution before I can procede: the solution has U4+ / U3+ = 100
Calculating Ferric and Ferrous Concentrations
Calculating Ferric and Ferrous Concentrations - please see the attachment. Thanks.
Effects of higher MPG in US petroleum consumption
Petroleum consumption in the US in 1990 supplied about 33.7E15 kJ of energy. Of this quantity, about 15.9E15 kJ was supplied by foreign sources. The transportation sector is the major user of petroleum, accounting for 23.2E15 kJ of consumption. Overall automobile fuel economy in the US was about 21 miles per gallon in 1990. ...continues
Iron concentration given pH and pE values
At pH 6.00 and pE 2.90, what is the concentration of Fe2+ (mol/L) in equilibrium with Fe(OH)3?
I would like some information as to the pros and cons of radioactive waste. I would like more info on the pros of using nuclear energy to meet our high-energy demands even though there is readioactive waste. How we dispose of it and the safety of the way we dispose of it.
pH and pE are given, need concentration of Fe2+
At pH 6.00 and pE 2.70, what is the concentration of Fe2+ (mol/L) in equilibrium with Fe(OH)3?
given temp, Eh(??) and pH, find disolved amt of Oxygen (ppm)
A ground water sample , at 25 C, has Eh= 0.6 and pH=6.40. Assuming the system is at equilibrium, calculate the amount of dissolved oxygen (ppm) in the groundwater sample.
pH is given, need calcium carbonate dissolved per liter
The average pH of precipitation in rural areas is 5.50. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere, calculate the amount of calcium carbonate (mg) dissolved per liter of rainwater. pKa1=6.33, KCO2=3.388e-02 Hint: PCO2=3.16E-4, I'm confused!
How much Less petroleum in kj needed? Dealing with mpg and kj consumption
How much Less petroleum in kj needed? Dealing with mpg and kj consumption -------------------------------------------------------------------------------- Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources. The transportation se ...continues
