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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
Assume 846 mg of a pure diprotic acid, this means that the acid is capable of donating two hydrogen ions or protons was titrated with 12.32 mL of a 0.684 M potassium hydroxide solution. Define the molar mass of the acid and the balanced equation i..
While excited elemental sodium gives off a distinctive color that is utilized often in street lighting. Explain what is the predominant wavelength associated with the emission of atomic sodium
the flow of florida current through the straights between key west and cub is 150 x 106m3sec. the mass concentration of
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
a swimming pool 20.0 m ? 12.5 m is filled with water to a depth of 3.71 m. if the initial temperature of the water is
Question- What problems would occur if the urea were added to a strongly acidic solution. Note- What happens to the nucleophile in strong acid
A 680 MW coal fired power plant is 34% efficient at producing electricity. The coal has a heating value of 20,000 kJ/kg, an ash content of 5.5% and a sulfur content of 4.5%. Note: 1 MW = 1000 kW , and 1 kW = 1 kJ/s. a. What is the daily input rate..
The molar mass for NaCl and water are 58.443 g/mol and 18.015 g/mol, respectively. Calculate the partial molar volumes for NaCl and water in a 0.35m solution
Suppose .050 moles of a substance reacts in 25.0 grams of water. If the water temperature goes from 22 degrees C to 26 degrees C, how much heat was given off? How much heat would be given off if one mole of the substance reacted
Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm. (1 inch = 2.54 cm)
Question- An organic compound A is composed of carbon, hydrogen and nitrogen, with carbon constituting over 60% of the mass. It shows a molecular ion at m/z= 112 in the mass spectrum. 1. Write a plausible molecular formula for compound A
If a drop of water clings to the outside of the foil cap and is not removed, how would the experimentally determined molecular weight be affected? Too high or too low?
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