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Calcualte the molarity of a solution made by dissolving31.5g of NaNo3 in 435g of water. How many grams of NaCl are present in a 1.2 M solution made by using 1.440 kg of water?
Give one use of the polymer Kevlar. What is the polymer found in disposable diapers that allows them to absorb so much liquid?
Tungsten (W) crystallizes in a cubic unit cell with a celledge of 0.3981nm. The density of Tungsten (W) is19.35g/cm3. Calculate the number of atoms per unitcell.
Zinc and magnesium metal each react with hydrochloric acid to makechloride salts of the respective metals, and hydrogen gas. A12.0 g mixture of zinc and magnesium produces 0.5166 g of hydrogen gas
Can someone help me describe the blood buffer system- includethe acid, base, conjugate acid and conjugate base (molecularformulas or names) and the source of the acid and conjugate base.Also indicat
What is the oxidation state and d electron count (numberof d electrons) for the metal ion in the following coordination complex? [Rh(en)3]Cl3
Propose and draw a mechanism for the reaction of the dianion of luminol with molecular oxygen to give the "postulated" cyclic endoperoxide intermediate and then for the loss of nitrogen to give the
List three possible fates of an electron that can occur after it has been excited to a singlet excited state. On the molecular level, what determines if a light-producing reaction is fluorescence or
Define and compare the terms ground state electron configuration versus the singlet excited states and triplet excited states.
How many millilters of the 1000ppm solution would youneed to add to a 500ml bottle of wine to achieve copper sulfate concentration of 0.1, and 0.2, and 0.5ppm?
A metal M forms an oxide having the formula of M2O3. M2O3 is 68.4 % metal by mass. What is the atomic wight of the metal? Set up the algebraic expression needed and then solve for the molar mass of
When the compund is analyzed for N content only, the masspercent of N is found to be 28.84 percent. What is the mass, ingrams, of N in the original 1.2359 g sample of the compound?
They can be removed by precipitation using solutions ofCa2+ ions because the Ksp of calciumphosphate is 2.0 x 10- 29.Suppose that 3.00 x 103 L of waste water containingphosphate ions at 2.2 x 10- 3M
A 2.30-g sample of a large biomoleculewas dissolved in 18.0 g of carbontetrachloride. The boiling point of this solution was determined tobe 77.85°C. Calculate the molar mass of the biomolecule.
In a Titration experiment, a student is given a weighed sample of a solid that contains a mixture ofKHC8H4O4 (KHP for short) and another salt that doesn't affect the pH of the solution.
In the lab, a student tried tp prepare N,N-diethylacetamideby heating acetyl chloride with two equivalents of triethylamine.was the student successful? Explain.
Rhodium is an element that has the appearance of silver, but it does not tarnish like silver, and because it is very hard, does not become worn or scratched like silver.
How high in meters must a column of water be to exert apressure equal to that of a 760 mm column of mercury? The density of water is 1.0 g/mL, where as that of mercury is 13.6g/mL.
If 5.00 g helium gas is added to a 1.00 L balloon containing 1.00 g of helium gas, what is the new volume of the balloon? Assume there is no change in temperature and pressure.
What is the pH at the midpoint of the titration of 50.0 ml of0.100 M acetic acid with 0.100 M sodium hydroxide? ka 1.74 x 10-5
Do the electrons flow from the zincelectrode to the nickel electrode or from the nickel to the zinc?e. In which directions do the cations and the anions migrate through the solution?
This reaction calls for the use of 2.20 grams of acetanilde and 6.5ml of Chlorosulfonic acid and is later poured into 30ml of ice water. Suppose that only 1.6 grams of acetanilide is available.
What structural features make benzil yellow and benzoincolorless (white)? What would the difference be in the reaction of benzoin tobenzil using copper acetate versus cuprous acetate?
What is the difference between hot-forming and cold-forming of metals with regard to the metal's recrystallization temperature?
What is the name of the phenomenon that makes the stability of a complex increase when two or more donor atomsare connected by a backbone that allows them to coordinate simultaneously to a metal ion