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The total mass of carbon in living systems is estimated to be 7.5 x 10^17 g. The total mass of carbon on Earth is estimated to be 7.5 x 10^22 g, what is the ratio of carbon atoms in living systems to the total carbon atoms on Earth? Report your answer in percent and ppm.
An iron ore sample is a mixture of Fe2O3 and several impurities. A 752. g sample of the impure iron ore is heated with excess carbon.
high spin whereas octahedral complexes can be either high or low spin, depending on the metal and/or ligand. What is the most likely explanation of this experimental result?
The Cu is added to the calorimeter, and after a time the contents of the cup reach a constant temperature of 30.2 *C. Determine the amount of heat, in Joules, lost by the copper block
The required dosage for a certain medication is 4.4 mg per kg of body mass. What mass of medication (in mg) is necessary for a female weighing 121 pounds? (1 lb = 454 g)
At a temperature of 500 degrees celsius the equilibrium constant ,Kc, for the following nitrogen fixation reaction 3H2(g)+N2(g)----->2NH3 is 6.0x 10^-2 . If 0.250 mol/L of H2 and 0.050 mol/L NH3 are present at equilibrium, what is the concentratio..
A coffee-cup calorimeter contains 140.0 g of water at 25.2 *C. A 122.0 g block of copper metal is heated to 100.4 *C by putting it in a beaker of boiling water.
How many grams of potassium phthalate must be added to 750 mL of 0.0500 phthalic acid to give a buffer of pH 5.75?
if two atoms of element A react with three atoms of element B, what is the chemical formula for the resulting compound
Calculate the delta H for the reaction in KJ/mol AgNO3, assuming that the combined solution has a mass of 100.00g and a specific heat of 4.18J/gc
An equilibrium mixture of propanoic acid (propionic acid), CH3CH2COOH, and its conjugate base has a pH of 4.87. Draw the form that predominates after H3O is removed from the equilibrium mixture
express the work of isothermal reversible expansion of a van der waals in reduced variable and find a definition of reduced work that makes the overall expression independent of the identity of the gas.
The solubility of magnesium fluoride, MgF2, in water is 0.016 g/L. What is the solubility (in grams per liter) of magnesium fluoride in 0.013 M sodium fluoride, NaF
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