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50 g of soil is extracted with NH4Cl (ammonium chloride) and the extract diluted to 0.5 liter. The solution contained the following cations:
120 ppm Ca+2 24 ppm Mg+2 1 ppm Na+ 13 ppm K+
a. Estimate the CEC (meq/100g)
b. The soil pH is 7.5. Was your estimate of CEC a good estimate? Why or why not?
Calculate the amount of energy present in the following photons and find the region of electromagnetic spectrum for each.
The concentration of sulfuric acid, H2SO4 is 36M. What volume is required to prepare 6.0 L of 0.12 M acid
If a sample containing 2.03 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
Which of the following accurately lists compouds in order of increasing solubility in water? A. LiCl2, Br2, O2, methanol (CH3OH) B. methanol (CH3OH), LiCl2, O2, Br2 C. O2, Br2, LiCl2, methanol (CH3OH) D. LiCl2, methanol (CH3OH), Br2, O2
In writing the chemical formula of a compound such as Al2O3, the following statement is a true relationship between the Al and O atoms
calculate the empirical formula for the bismuth oxide, 89.7% Bi and 10.3 O. and percent composition
The heat of reaction for the combustion of cyclobutane, C4H8, is 650.3 kcal/mol. What is the heat of combustion for cyclobutane in kcal/gram?
assume that the pressure in the bottle was 1.5 atm, the bottle had a headspace of 20 mL, and the headspace contained 90% CO2. carbonate species and dissociation products of water.
A certain aldose is added to an aqueous sodium hydroxide solution. After equilibrium is reached it is found that there are 3 open chain sugars in the solution. Draw the enediol that is believed to be the intermediate.
What are the equilibrium concentrations of NH2OH (hydroxylamine), NH3OH+, and OH- in a 0.15 M solution of hydroxylamine (Kb=6.6*10^-9)? What is the pH of the solution
Balance the following equations and write balanced net ion for each reaction. a) HBR(aq) + Ca(OH)2 (aq) b) net ionic equation C) Fe(OH)3 (aq) + H2SO4 (aq) d) net ionic quation
When placed in a graduated cylinder that initially contains 24.00 mL of water, the water level rises to 28.55 mL. What is the density of the unknown material?
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