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The overall hydrogen burning reaction in stars can be represented as the conversion of four protons to one alpha particle. Use the data for the mass of H-1 and He-4 to calculate the energy released by this process.
write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide
Galvanic cell consists from CO/CO2+ standard electr0de and NI/NI2+ ELECTRODE. At what concentration of nicle electrolyte the theoretical
according to a study of us cigarette sales between 1955 and 1985 when the price of cigarettes was 1 higher consumption
What is the rate of formation of carbon dioxide over the specified time period in this reaction
Phenol is a weak organic acid with Ka=1.0x10^-10. How many grams of phenol do you need to add to 500. mL of water to make a pH=5.75 solution
1. during an acid-base titration 23.3 ml of hcl completely neutralized 19.5 ml of potassium hydroxide 0.315 m.
The meniscus of mercury in a glass capillary tube is convex because of A)the very high density of mercury as compared with water. B)the low surface tension of mercury
A solution has [Cl-] = 0.041 mol/L and [I-] = 0.073 mol/L. Finely divided, solid Pb(NO3)2 is slowly added to the solution with stirring. SALT=PbCl2 Ksp=1.6x10-5 SALT=Pbl2 Ksp=7.1x10-9 What are [Pb2+ ], [Cl- ] and [I- ] at the instant the second pr..
how many grams of dry nh4cl need to be added to 1.60 l of a 0.800 it m solution of ammonia nh3 to prepare a buffer
Calculate the {H30^+] of each aqueous solution with the following [OH^-] at 25 degrees C: A. NaOH, 1.0x 10^-2M B. asprin 1.8x 10^-11M C. Milk of magnesia 1.0x 10^-5M D. seawater, 2.0 x 10^-6M
how many moles of zinc were oxidized. by how many grams did the mass of of the zinc electrode change during this process
A 43 kg person drinks 280. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 19% of the energy in milk is converted to mechanical work.
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