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How many grams of copper are produced when excess aluminum reacts with 11.0 g of copper oxide.
An aqueous solution contains 4.90% NH3 (ammonia) by mass. The density of the aqueous ammonia is 0.979 g/mL. What is the molarity of NH3 in the solution?
Using the Arrhenius concept of acids and bases, identify the Arrhenius acid and base in each of the following reactions
What is Ka? The answer is 8.1E-10. Hope you can help
Explain Oxidation of Elements and Their Reactions, Which element is oxidized and which element is reduced in each of the following reactions?
Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.10 mm.
Indicate whether each of the following reactions lies to the right, favoring the formation of products, or lies to the left, favoring formation of reactants.
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
Calculate the P-Cl bond energy, given the following reaction and the average bond dissociation energy of chlorine as 240kJ/mole.
If a 0.10M solution of HA has a pH of 5.83 at 25 degrees C, what is deltaG0 for the acid's dissociation at 25 degrees C
The half-life of 137Ce is 30. years. If we have 150.000 g of 137Ce now, how many grams of Ce will remain in 150. years?
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol.
Using the following reaction: OH- + HC2H3O2 ---> H2O + C2H3O2- a 75.0 mL sample of potassium hydroxide, KOH, of unknown concentration is titrated with 42.5 mL of 0.575 M acetic acid.
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