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Explain why does dichromate (Cr2O72-) have seven oxygen atoms whereas chromate (CrO42-) have only 4 shouldn't dichromate have eight oxygen instead of 4?
What is the density (in grams per liter) of a gas mixture that contains 26.0 % F_2 and 74.0 % He by volume at 743 mm Hg and 28.5 C?
the meta and para forms of phenylene diamine are used in the production of Kevlar and Nomex, respectively. Why is a corresponding material with similar properties not made from ortho-phynelene diamine
evaluate its purity and to determine whether it might be identical to a given sample of an illegal drug, a white crystalline solid. Clearly explain what you would do, why you would do it, and how you interpret your results
A gaseous mixture of 02, H2 and N2 has a total pressure of 1.50atm and contains 8.20g of each gas. Find the partial pressure of each gas in the mixture?
Calculate the uncertainty in the distance of the electron (in Angstroms) at any point during its 25 Angstrom journey. (HINT: remember velocity = distance/ time)
What is the molar mass of a nonelectrolyte compound if 3.42 grams of the compound dissolved in 41.8 grams benzene begins to freeze
water is pumped into a storage tank from a well delivering 15.0 gallons of water in 34.0 seconds through a pipe of 1.00
Derive the relationship that the effective rate constant of the reaction K is the same as (d[P]/dT)/([A][B]) takes the form k= k2 exp(-deltaG/RT) Where deltaG(these deltaG are with double dagger )is the standard free energy difference between the ..
You react 2.33 g of iron (III) with 5.0 mL of 0.500 M solution of sodium phosphate to form iron (III) phosphate and sodium chloride. How many grams of sodium chloride ought to be produced
If A container holds 355mL of a mixture of nitrogen also carbon dioxide gases. The container is found to have a little leak. Assume which gas is escaping faster
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55. The half life of Potassium 40 is 1.28 x 10^9 years.
suppose that you are given a 0.700 m acetic acid solution and a 0.500 m sodium acetate solution. determine the volumes
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