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Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours. An eardrum has an area of 3.33 x 10-4 m2. How much sound energy is incident on the eardrum during this time?
what is the hybridization of each carbon for the following structure? explain each one and provide the line structure.
What are structures and what process used in the reaction of Isobutylene with HCL to get tert-butyl-chloride?
What ions are in these solutions. cold tap water, 0,9 % NaCl (aq), 0,1 M acetic acid, 0,1 M HCl, 0,1 M NaC2H3O2 (aq), 0,1 M ammonia.
High-purity benzoic acid (C6H5COOH; change H (rxn) for combustion = -3227 kj/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter
How much energy must be supplied to break a single 21 Ne nucleus into separated protons and neutrons if thenucleus has a mass of 20.98846 amu. What is the nuclear bindingenergy for 1 mol of 21 Ne.
at high temperatures phosgene cocl2 decomposes to give carbon monoxide co and cl2. in a typical experiment 0.631 g of
An electrochemical cell is constructed with a zinc metal anode in contact with a 0.0520M solution of zinc(II) nitrate and a silver cathode in contact with a 0.00420M solution of silver(I) nitrate
32.4 mL of 0.153 M HCl(aq)will neutralise 25.0 mL of NaOH(aq) solution of unknown concentration. Calculate the concentration of the NaOH(aq)solution. Your answer should be in molL-1(aka M). Please do not include units in your answer.
Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32 x 10^-9. You have available at your lab bench a 0.1 M solution of Tris in its protonated form, 0.1 M solution of HCL and NaOH, and ample distilled water. Descr..
Calculate ph of solution formed by mixing 250 ml of .15 M NH4Cl with 100 ml of .2 M NH3. Kb for NH3 at 25C is 1.8x10^-5
Lauryl alcohol, C12H25OH, is prepared from coconut oil; it is used to make sodium lauryl sulfate, a synthetic detergent. What is the molality of lauryl alcohol in a solution
which of the responses includes all of the following that can form hydrogen bonds with water molecules
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