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The venom black widows has a rat LD50 of approximately 0.002 mg/kg. Assuming a density of 1g/ml, what volume of venom do black widows and rattlesnakes have to inject to have 50% chance of killing a human? What are the many assumptions that go into this calculation? does the amount intuitively seem like a reasonable amount for the spider bite?
Calculate the proportion by mass of titanium in Sphene. Give your answer as a percentage to 2 significant figures. You will need to consult the Periodic Table in Book 4, page 48, to obtain the relative atomic masses of the elements in the mineral.
Why are the mobile phases added in order of increasing polarity rather than in the order of decreasing polarity?
The fluorescence intensity for the diluted sample at 347.5 nm offers a reading of 245 on an arbitrary scale. A standard 100-ppm quinine solution registered 125 when measured under conditions identical to those for the diluted sample. Compute the m..
Problem- Write the structural formula for each compound: A) undecane B) propyne C) cyclopentane D) cyclohexene
How many grams of FeSO4.(NH4)2SO4.6H2O (MW = 392.14) must be dissolved and diluted to 250.0 mL to prepare an aqueous solution that is 10.00 ppm Fe2+
Write a balanced equation with phase changes for an electrochemical cell that has a copper cathode immersed in a solution of cu+2 ions and a lead anode immersed in a solution of Pb+2 ions
Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter
Problem- Complete and balance each of the following equations for acid-base reactions. I'm completely lost please help
A 10.0-mL sample of a HCl solution has a pH of 2.000. What volume of water must be added to change the pH to 4.000?
Compute the number of atoms in the subsequent unit cells a.) body-centered cubic structure b.) hexagonal structure. ii.) Compute the packing efficiency of each above unit cell.
The inclined arm is 8mm in diameter and the larger arm has a diameter of 24mm. The manometric fluid has density 740 kg/m3 and the scale may be read to +/- 0.5mm. What is the angle required to ensure the desired accuracy may be achieved
The white precipitate obtained when cold HCl was added to an unknown solution was completely insoluble in both hot water and NH4OH
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