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A soil analysis was done for the exchangeable cations in the soil and the results were as follows:Ca = 1.8 g/kg (atomic wt. Calcium is 40 g/mol)Mg = 3.25 cmolK = 3 cmolNa = 0.230 g/kg (atomic wt. of Na is 23 g/mol)H = 9 cmolAl= 0.66 cmol. Calculate the CEC of this soil (Do not forget the units). Please show example calculations.
Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm
How many kilograms of CO2 are produced from the complete combustion of 1.00L of gasoline assume that the gasoline has the formula C8H18.
Calculate the total pressure (in atm) of a mixture of 0.0270 mol of helium, He, and 0.0200 mol of oxygen, O2, in a 4-L flask at 20°C. Assume ideal gas behavior.
hexane is a hydrocarbon a molecule containing only carbon and hydrogen with a molecular weight of 86.18 gmol a density
A 32.0-g sample of water at 290. K is mixed with 48.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
In ESI, it is very important to regulate the pH of the solution. Therefore, the solution is usually buffered or has added acid. How does the solution pH influence the ionization efficiency and the distribution of charged species formed?
A patient is given 0.050 mg of technetium-99m where m means metastable- an unstable but long lived state), a radioactive isotope with a half-life of about 6.0 hours. Explain how long until the radioactive isotope decays to 6.3 * 10-3 mg
What is the molar solubility of PbI2 in water? For PbI2, Ksp=7.9x10-9. You may assume that the ions do not form ion pairs in solution. Give your answer in moles per litre, accurate to two significant figures
Lime, CaO, is produced by reaction CaCO3(s) CaO(s) + CO2(g). What weight of CaO is obtained by the decomposition of 38.7g of CaCO3.
the vapor pressure of pure ethanol at 35c is 102.8 torr and that of pure chloroform is 295.1 torr. in an
Write a Lewis structure for each of the following molecules.
Analysis of a commercial chewing gum gave results of 0.295 mg/g of BHA. To evaluate the accuracy of their results, they performed 5 spike recoveries, adding an amount of BHA equivalent to 0.181 mg/g to each sample.
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