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A basalitc magma with a 87Sr/86Sr ratio of 0.7025 and a Sr concentration of 300 ppm, a sigma18 O value of 0 passes through a granitic crust with a 87Sr/86Sr ratio of 0.750 and a Sr concentration of 150 ppm and a sigma 18 O of +20. Assuming the oxygen content is analogous in the basalt and granite. The basalt assimilates granite in the proportions of 1%, 2%, and 5% What are the O ans Sr isotopic compositions of the contaminated magmas?
Show all the steps in the mechanism for the following reaction, When benzene is mixed with deuterated sulfuric acid, deuterium is slowly incorporated onto the ring. Show the mechanism for this reaction and explain how this relates the sulfonation of ..
calculate mass of KHC8H4O4 (molar mass = 204.44 g/mol) that reacts with 15 ml of the NaOH solution
how many millileters of a 0.225 M HCL solution are needed to neutralize 259 mL of a 0.0309 M Ba(OH)2 solution.
a student placed glucose of 10.5g in a volumetric flaskmixed enough h2o to mix the glucose by swirling and mixed
Write an equilibrium expression for each chemical equation. 1. 2CO(g)+O2(g)===2CO2(g) 2. N2(g)+O2(g)===2NO(g) 3. SbCl5(g)===SbCl3(g)+Cl2(g) 4. CO(g)+Cl2(g)===COCl2(g)
Calculate the pH of a solution prepared by mixing 20.5 mL of a .5 M sodium flouride solution with 32.5 mL of a .750 M hydrofluoric acid solution
A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Chlorine dioxide, ClO2, is a reddish yellow gas used in bleaching paper pulp. The average speed of a ClO2 molecule at 25 degrees Celsius is 306 m/s. What is the kinetic energy of a ClO2 molecule moving at this speed?
How many moles of Urea were used to creat this tempreature difference? given the molecules weight (60.0551g/mol), how money grams of urea was used to give this change temperature value?
A certain sunstance, intially present at 0.0800 M, decomposes by zero-order kinetic with a rate constant of 2.50 x 10-2 mol/l s. Calculate the time (in seconds) required for the system to reach a concentration of 0.0630
Why do you wash the ether layer with sodium carbonate? 4. Why is this experiment more expensive than the Fisher esterfication process? When is this method perferred?
silver has only two naturally occurring isotopes 107ag with a mass of 106.90509amu and an abundance of 51.84% and 109ag with a mass of 108.9047 amu calculate the atomic mass of silver.
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