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Consider the reaction between a magnesium atom and a sulfur atom to form magnesium sulfide. Would you expect this reaction to be exothermic or endothermic? Explain?
Calculate the feed ratio of adipic acid and hexamethylene diamine that should be employed to obtain polyamide of approximately 15000 molecular
If you were to perform this reaction in a lab, you would make far less than the theoretical yield of product due to a wide range of outside factors. We can compare the actual yield to the theoretical yield to calculate the percent yield:
An anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
What is the mole fraction of solute and the MOLAL (MOLALITY NOT MOLARITY!!!!!) concentration for an aqueous solution that is 14.0% NaOH by mass
Describe in detail how you would prepare 300 mL of aqueous 0.200M sodium sulfate. What mass of sodium sulfate is needed
The concentration of hydrogen ions in a solution of 40.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO- to be 500 pm
a storage container has the dimensions of 232mm by 0.145m by 32.5cm. If it is filled with liquid mercury (density 13.534 g/ml), what is the mass in kg of the mercury in the container
Why do oxyacids become stronger when more oxygens are added. (as in the case of HNO2 being much weaker than HNO3)
A solid mixture consists of 34.0g of KNO3 and 6.0g of K2SO4. The mixture is added to 130.0g of water. (this problem includes a solubility curve for other answers).
The solvent for an organic reaction is prepared by mixing 70.0 mL of acetone (C3H6O) with 73.0 mL of ethyl acetate (C4H8O2). This mixture is stored at 25.0 degrees C.
Would the organisms find the environment in the untreated water more favourable, less favourable, or identical (from an energy standpoint) after equilibration with air. Explain briefly
Write lewis structures for each of the following species. Use expanded octects as necessary.
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