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Explain why either greatly decreasing or increasing the percentage of oxygen in the atmosphere is dangerous.
Which of the following is a forbidden transition? please give a brief explanation why you chose your answer a) L=3 m=2; l=2 m=2 b)L=3 m=2 ;l=2m=0 c) L=3m=2; l=4 m=3 d) L=3 m=2; l=2m=1
Question- Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution that is 0.28M in formic acid (HCO2H) and 0.52M in sodium formate (HCO2Na).
solid ironiii oxide reacts with solid aluminum to produce solid iron and solid aluminum oxide. if 50.0 grams of
How many grams of CuSO4*5H2O should be dissolved in a volume of 500.0 mL to make 8.00 mM Cu2+?2. An iron ore is analyzed for iron content by dissolving in acid, converting the iron to Fe2+, and then titrating with standard 0.0150 M K2Cr2O7 solutio..
Which of the subsequent statements does not accurately describe a characteristic property of an Arrhenius acid
Does ammonium chloride added to water produce a simple solution, does the ammounium chloride dissociate or does a chemical reaction occur resulting in a new set of compounds.
aluminum has a specific heat of 0.900 jgmiddotdegc. how much energy is required to raise the temperature of 160. g of
A beaker with 200 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 7.20 mL of a 0.490 M solution to the beaker. How much will the pH chan..
Draw a structure for each isomer of dimethylcyclopropane. Label each proton, a, b, c etc.. to indicate the number of signas in the H NMR spectrum. Use the same letter for equivalent protons.
A sample of 1.00 mol of a perfect monatomic gas with a molar heat capacity at constant volume of 3/2R initially at 298K and 10 L is expanded with the surroundings maintained at 298K, to a final volume of 20 L in three ways
construct molecular models of threo- and erythro-2,3-dibromo-3-phenylpropanoic acid and show which diastereomer would be formed by anti addition of bromine to trans-cinnamic acid
the force generated in a living cell by elongation of a single actin filament is approximately 1 pn. calculate the work
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