- If there are 650 mg of nicotine in a cigarette, how many moles and molecules is this?

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C6H6 AXmEn & Molecular Shape? Entropy and Enthropy problem? Phosphoric acid, is a triprotic acid, for which Ka1= 7.2×10^-3, Ka2 = 6.3×10^-8 and Ka3 = 4.2×10^-13. What is the value of Kb for PO43-? In what way will the calculated molar mass be affected if the precipitate is not heated to constant mass. **Please help 5 stars Chemistry***? How the **** you use fsolve in Maple when you have two equations: x+y=2, 2x-y=3? it doesn't give u a solution it said invalid arguments?