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Draw the Lewis Structure of the Following species, give the formal charges the central atoms, and state the electrons and molecular geometries of each.
a. HCN b. NO2-c. SeOF2d. IF4+
find the mass of C3H8 required to generate 2.5x10^8 KJ of energy when combusted with O2 gas to produce CO2 gas and water vapor.
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves
It takes 53.0 j to raise the temperature of an 10.2 g piece of unknown metal from 13.0 C to 24.9 C. What is the specific heat for the metal. Answer in value and units (fully) for full points.
Calculate the solubility of MgCO3 in pure water, ksp = 3.5 E=8. Then calculate the solubility of the same MgCO3 in a .010 M Al(NO3)3 solution. Assume there is no other interaction between any of the components of the 2 molecules.
The molar solubility of a compound AX2 is 2.5 x 10-3 M. Calculate the value of Ksp for AX2. 1.5 x 10-3 6.3 x 10-8 1.4 x 10-8 3.4 x 10-9 none of these
A particular smoke detector contains 2.85 uCI of 241Am , with a half-life of 458 . The isotope is encased in a thin aluminum container. Calculate the mass of 241Am in grams in the detector. Fears of radiation exposure from normal use of such detec..
How many grams of NH3 can be produced from the reaction of 28 grams of N2 and 25 g of H2
Why is it important to maintain the reaction temperature low and the addition of nitric acid-sulfuric acid mixture carried out slowly
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.49. What was the concentration of the solution? The Ka of lactic acid is 1.4 10-4.
This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 2.20 L, at the temperature is held constant at 297 K. After two hours the pressure inside the ..
100.0mL of 0.400 mol/L CoCl2 (aqueous) is mixed with 100.0mL of 1.600 mol/L NaOH. Determine the moles of precipitate which form, and the molarity of each ion (including spectator ions) after the precipitation process is complete
Some students observe a low-boiling fraction around 40 degrees C during the simple distillation of preparing t-amyl chloride from t-amyl alcohol with catalyst HCl and reagent H2O. What compound(s) might be present in this fraction
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