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What is H in kJ for the process of freezing a 39.2 g sample of liquid antimony at its normal melting point of 631oC? is it positive or negative? INFO boiling point = 1440oC vapH(1440oC) = 195 kJ/mol melting point = 631oC fusH(631oC) = 19.6 kJ/mol specific heat solid= 0.209 J/goC specific heat liquid = 0.259 J/goC
circle the correct choices to indicate how many electrons each element must gain or lose to form an octet
Draw the structure resulting from a reaction of osmium tetroxide (OsO4) and hydrogen peroxide (H2O2) with the following alkene. If one stereogenic center is formed, draw a single specific enantiomer. If more than one stereogenic center is formed, ..
The half-life of 32P is 14.3 days. If you begin with 4.9 ?g (micrograms) of radioactive 32P in the form of Na2HPO4, what mass remains after 28.6 days (about one month)
If 4.5 of ammonium chloride were dissolved in 200 L of water what would be the ammonium chloride concentration in mg/L
what is the theoretical yield of carbon dioxide when 56.0 g of methane is burned in a excess of oxygen, according to the equation CH4 2 )2 ->CO2 ,2H2o.
Draw products A through E for the following series of reactions. If both ortho and para product would form, continue on only with the para product, but mention that ortho would also be a product.
Determine the total number of valence electrons in each of the following: a) COCl2; b) N2O; c) ClO2^-; d) SeCl2; e) PBr3
If a photon has a wavelength of 412.2 nm, what is its energy in J, frequency in s^-1, wavenumber in cm-1, and linear momentum in kg m/s
Select the IR frequency and number of NMR signals that is diagnostic for either isomer a or isomer b. Isomer A: cyclopentanecarboxamide Isomer B: 6-hydroxyhexanenitrile
Calculate the standard potential for this cell at 25 °C. Standard reduction potentials can be found here.
what is the diameter of an aluminum atom? the mass of 1 mold is 27 g the density of aluminum is 2.7g mol
How many grams of solid Iodine are produced by the decomposition of 3.8 grams of hydrogen iodide gas? Round your answer to one decimal place.
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