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How exactly do you name a pyrrole because I've been attempting ahomework assignment and one of the structures is a pyrrole, but thename is incorrect.
A student measures the melting point of benzil and reports themelting point in the lab notebook as 95C. Explain what the student did wrong.
Solid lithium metal reacts with water,giving a solution of lithium hydroxide andreleasing hydrogen gas. Write a balanced equation for the reactionusing complete formulas for the compounds with phase
A sample is marked as containing 42.7% calcium carbonate by mass.What mass of calcium carbonate is contained in 33.9 grams of the sample?
A 0.4400-g sample of impure Ca(OH)2 is dissolved inenough water to make 43.90 mL of solution. 20.00 mL of theresulting solution is then titrated with 0.2554-M HCl.
2 mL of heptane plu 2 mL of alpha pinene give 4 mL of solution. Howmany grams per mL are in that mixture? Suppose you diluted 0.25 mLof the 50:50 heptane/alpha-pinene mixture to 5 mL with solvent an
A 40-year-old manager, at a prominent legalfirm in L.A., experiences abdominal pain post lunch. He goes to therestroom a couple of times, but continues to experience pain andcramps.
A hiker caught in a thunderstorm loses heat when her clothingbecomes wet. She is packing emergency rations which if completelymetabolized will release 30kJ of heat per gram of rations consumed.
Many gases are shipped in high pressure containers. Consider asteel tank whos volume is 65L and which contains O2 gas at apressure of 16,500 KPa at 23 degrees celcius.
Your stomach is a chemical reactor. When you consumea fast food $0.99 hamburger in about a minute, it acts like aninstantaneous input of 325 g of food entering the stomach.
An ionic compound forms when calcium (Z = 20) reacts withiodine (Z = 53). If a sample of the compound contains 1.4x 1019 calcium ions, how many iodide ions does it contain?
In the model of heptane where the chain is fully extended andanother model been its mirror image . Are these two mirror imagessuperimposable?
When 15.12 mL of 0.1194M NaOH is added to 25.00 mL of 0.1246M HX (an unknown weak acid), the resulting pH is 5.9. What is the Ka of the unknown acid?
Additioonal Feat! Dexter and Mandark team up in order toprevent the asteroids from destroying Earth. They start thisplanet saving feat by weighing a gelatin capsule (0.117g) Next they add pieces of
Dexter and Mandark team up in order to prevent theasteroids from destroying Earth. They start this planet savingfeat by weighing a gelatin capsule (0.117 g) Next theyadd pieces of aluminum/zinc allo
Calculate the molecular formula of diazomethane, assuming thecompound is 28.6% C, 4.8% H, and 66.6% N by mass and the density ofthe gas is 1.72 g/L at 250C and 1.00 atm.
Assume your are given a brain which weighs 1.45 kg andcontains 7.70e10 cells. If each cell was a cube, and had a densityof 1.0 g/mL
How would you not tell the difference between the three? Usinig the technique in the lab (we measured the samequantities of water using two different measuring devices andcompared them using a t tes
Americium-241 is used in smoke detectors. It has a rate constant for radioactive decay of k =1.6x10-3yr-1. How much of a 1.00-mg sample of Americium-241 remains after three half-lives?
What is the maximum solubility of ferrous ion in an anaerobicpH 10 solution containing 10-6 M sulfide(S2-)? Will FeS or Fe(OH)2 precipitatefirst?
A laser emits a pulse of light containing 7.99 ×10-15 J of energy at a frequency of 3.32 ×1015 Hz. How many photons are present in the pulse?
Determine the molecular weight of the Venusian atmosphere assuming that it consists of 95% CO2 and 5% N2 by volume. What is the gas constant for 1 kg of such an atmosphere? (43.2 g mol-1, 192.5 J k
Calculate the amounts of NaCl that would need to be added to 100 mL of 0.001 M KHP to give four ionic strengths between 0.01 and 0.50. Take into account that KHP ionizes completely in solution, add
If 50.0 g of copper(I) oxide and 25.8g of copper(I)sulfide are initially present, determmine the teoretical yield of copper. Indicate excess reagent.
A solution containing the biotinylated nanoparticles and streptavidin is initially prepared, and this solution is put incontact with the surface.