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How many Sr2+ ions are in a mole of Sr3(PO4)2? Also, how many PO43- ions are in a mole of Sr3(PO4)2?
A 4.000-g sample of the metal nitrate M(NO3)2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal.
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
In a gas mixture, the partial pressure are argon 415 mmHg, neon 75mmHg, and nitrogen 125 mmHg. What is the total pressure (atm) exerted by the gas mixture
Calculate the concentration of OH- ions in a HCl solution whose hydrogen ion concentration is 1.5M
what is the weight of O in 742.0 g of citronella oil that has the chemical formula C10H18O
The temperature of a 150 gram drinking hlass decreased from 25 to 14 * C as 200 grams of water were added
calculate the percent yield based upon the amount of maleic anhydride used. use the molecular weight of one repeating monomer unit for the weight of the product.
A 1.45 g sample of an iron ore is dissolved in an acid and the iron is obtained as Fe+2 (ag). To titrate the solution, 21.6 mL of 0.102 M KMnO4 (aq) is required. The Fe+2 solution reacts with MnO4- as follows: 5Fe+2 (aq) + MnO-4 (aq) + 8H+ (aq) --..
Describe why barium must be disposed of properly. What are the health effects of excess barium in drinking water? What is the maximum allowable concentration of barium in public water systems?
Sulfur, S8, combines with oxygen at elevated temperatures to form sulfur dioxide. If 288 oxygen molecules are used up in this reaction, how many sulfur molecules reacted. In the reaction above, how many molecules of sulfur dioxide were formed
The activity of the antibiotic penicillin slowly decomposes when stored in a buffer at pH 7.0, 298K. The time dependence of the penicillin antibiotic activity
Draw the major organic product(s) formed when hex-2-yne undergoes hydration in the presence of HgSO4 and H2SO4.
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