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Nicotine (C10H14N2), a plant alkaloid, is an oily liquid that makes up between 0.6 to 3% of a cigarettes mass. Contact with the liquid pure form can cause death within hours, as nicotine passes through the dermis and heads directly for the bloodstream. Overdoses and death can easily occur in those smoking cigarettes with nicotine patches applied on their body. How many nicotine molecules are in 4.50 g of nicotine?
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at 22.75 C and 485 Torrat 0C. what is the standard enthalpy of vaporization?
explain how do you compute the minimum volume of h2owater required to dissolve nacl sodium chloride of 500 grams in h2o
A student has prepared a 0.309 M solution of Barium hydroxide and a 0.443M solution of hydrochloric acid for you. Determine the volume of the hydrochloric acid solution will be needed to exactly neutralize 10.0 mL of the Barium chloride solution.
What is the ratio of oxygen atoms to hydrogen atoms in the mineral cacoxenite, Fe4(PO4)3(OH)3 • 12H2O?
A weaken solution in water has an osmotic pressure of 12.2 atm at 20oC relative to pure water. Approximate the mole fraction of water in the solution also the difference in chemical potential between pure water and the solution.
a sample of an ethanol-water solution has a volume of 53.7 cm3 and a mass of 50.5 g. what is the percentage of ethanol
Given the following pairs, if used in an electrolytic cell which would be the cathode and which would be the anode
when 25.0 ml of 0.500m h2so4 is added to 25.0ml of 1.00m koh in a coffee cup calorimeter at 23.5 degrees cel the
How many times heavier than 12C is the average atom of this element?
Hemoglobin has a mass of about 67,000 g/mol. It is 0.3335% iron by mass. How many iron atoms are in a molecule of hemoglobin?
Say your a facility manager at a powerplant and your preparing for an interview with a news media reporter concerning environmental hazards at your facility
Assuming levels of atmospheric CO2 are 390 ppm CO2, what is the pH of rainwater in equilibrium with the atmosphere for the pre-industrial atmospheric CO2 concentration of 280 ppm,v.
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