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The Chemistry of NicotineNicotine, a component of tobacco, is composed of C, H, and N. A 5.250-mg sample of nicotine was combusted producing 14.242 mg of CO2 and 4.083 mg of H2O. What is the empirical formula for nicotine? If the substance has a molar mass of 160 ± 5 g/mol, what is its molecular formula?
What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
What is the change in air temperature(, assuming the heat from the steam is all absorbed by air)
You are the Science Officer on the Starship Enterprise and you come across a new planet. You find that no light with wavelength less than about 650 nm reaches the surface of the planet.
Explain Oxidation of Elements and Their Reactions, Which element is oxidized and which element is reduced in each of the following reactions?
A 32.0-g sample of water at 260. K is mixed with 47.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Calculate the Gibbs energy of the reaction (delta G rxn) at 25'C for the above rxn when all three gases are at 0.0010 atm. Kp = 1.8 x 10 ^ - 18
25.0 cm3 of a saturated solution of Ca(OH)2 required 21.0 cm3 of 0.0500 mol dm-3 HCl for complete neutralisation. Calculate the [OH-(aq)] and the [Ca2+(aq)] in the saturated solution.
Considering the given equation Fe2O3 (s) + 3 CO (g) ? 2 Fe (s) + 3 CO2 (g) this is The overall reaction for the production of iron from iron ore (Iron (III) oxide) determine How many kilograms of iron are required to form 10,000 kilograms of Fe?
A. Epinephrine, C9H13NO3, has a concentration of 10-10 M in circulating blood. Calculate the diameter of a round swimming pool with a water depth of 2.0 M that would be needed to dissolve 1.0 g (about a teaspoon) of epinephrine.
Determine what is the density of the oxygen gas in the full bottle If A cylindrical gas lecture bottle has internal dimensions of 18.0 cm in diameter and a height of 49.0 cm and weighs 1.75 kg when empty.
Differ from the ideal pressure? The value For N 2 gas is given as , a = 1.390 L2atm/mol2 and b = 3.910E-2 L/mol.
What volume of hydrochloric acid solution of 0.25 M must be diluted to prepare 1.00 L of 0.040 M HCl and calculate Keq at this temperature for the given reaction 2 NOCl (g) W 2 NO (g) + Cl 2 (g) ( reaction is at equilibrium):
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