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Below is a list of chemicals with their oral LD50 in mg/kg (rats). Select the substance that is MOST toxic to rats. DDT, 87 mg/kg malathion, 885 mg/kg carbaryl (sevin), 307 mg/kg parathion, 3 mg/kg
what are the h3o and oh- concentrarions in a 125 ml solution prepared with 0.100 mol pf naoh and
What is the buffer strength (ie the total of Ha and A). The concentration of weak base in the buffer on 0.126 M The concentration of weak acid in the buffer is 0.04906
Question- Draw a flow sheet to show how you would separate the components of a mixture containing an acid substance, toulic acid, a basic substance, p-bromaniline, and anthracene, a neutral substance
acetylene gas c2h2 is produced by adding water to calcium carbide cac2.cac2 s 2 h2o l -----gt c2h2 g caoh2 aqhow many
Using the molar ratio, determine how many liters of 0.180M lead (II) nitrate are required to react completely with 0.08 L of 0.130 M manganese (IV) chloride. Show work. (Superscripts= X^2, subscripts= X_2). Make sure to use the correct units.
explain why the rf values changed when the eluant was changed from 100 petroleum ether to a 955 mixture of petroleum
A standardized solution that is 0.0100 M in Na is essential for a flame photometric determination of the element. Explain how many grams of primary-standard-grade sodium carbonate are necessary to prepare 700.0mL of the solution
A molecule has the empirical formula C3H7 and has a density of 3.844g/L at STP. If one mole of this gas is burned completely in excess oxygen, how many moles of CO2 are produced
A sample of a gas in a cylindrical chamber with a movable piston occupied a volume of 2.86 cubic meters when the pressure was 9.85 × 104 Pa and the temperature was 25.8 ºC
A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The combustion of 29.9 mg produced 81.3 mg of CO2 and 16.6 mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular fo..
When beryllium-9 is bombarded by alpha particles , carbon-12 is produced. Write an equation to show what other particle is emitted.
The Bradford assay is often utilized in place of the standard Biuret assay. Explain the general chemical mechanism of the Bradford assay as well as list the major advantages of this technique.
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