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Hawaiian macadamia nuts provide about 190 Cal of energy usable from the digestion of these nuts per 1.0 oz serving. If the usable energy in an 8.5 oz can were used to light a 100-watt (W) light bulb (1 W = 1 J⋅s), how many hours would the light bulb run from one can of these snacks?
In one experiment, when 112 grams of calcium oxide was mixed with 224 grams of ammonium chloride, 16.3 grams of ammonia was produced. What is the percent yield of ammonia in the experiment
Calculate the pH of a 2.96 M solution of 2,4,6-trimethylpyridine. The Kb of 2,4,6-trimethylpyridine is 2.7x10-7
Both on Earth and in the sun the abundance of N is lower that that of its neighbors C and O. Is this the expected observation. explain
48.61 g of magnesium was dissolved in diluted sulfuric acid and 490 g of MgSO4 . 7H2O was isolated from the solution. How many percent of impurities (if any) did the metal contain?
Draw an energy-reaction coordinate diagram for both exothermic and endothermic reactions and compare the two. How would temperature changes observed using a calorimeter differ for exothermic and endothermic reactions?
For three known solutions and an unknown solution of a compound in water: Which one of the following values is possible as the molarity of the unknown
A sample of 0.836 gm of unknown compound containing barium ions Ba2+ is dissolved in water and treated with an excess of Na2So4. If the mass of BaSo4 precipitat formed 0.7403 gm, what is the percent by mass of Ba in the orginal unknown compund
how many joules of heat are needed to raise the temperature of 591 grams of water from 25C to 55C?
An unknown nuclide decays by elimination of 2 alpha particles followed by a positron. Bombarding this decay product with a 6Li nucleide creates the single nuclide Pb-207. What was the origional nuclide
The standard free energy (?G0') for the hydrolysis of ATP is -30 kJ/mol. The free energy for the hydrolysis of ATP in the cell (?G) is -50 kJ/mol. Which number is closest to the ratio of [ADP][Pi]/[ATP] found in the cell? R=8.314 J/mol*K T=310K An..
magnesium burns in air to produce magnesium oxide mgo and magnesium nitride mg3n2. magnesium nitride reacts with water
Atkin's Physical Chemistry 9th edition. 10.14a. The ionization energy of Xe5p and F2p electrons are 12.1eV and 17.4 eV, respectively. Calculate the energies and composition of the bonding and antibonding orbitals of XeF. Use beta=-1.5eV and S=0.
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