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You are given 2.51 g of salicylic acid (MM = 138.118 g/mol). Utilizing the procedure in the lab manual for the synthesis of aspirin (MM = 180.154 g/mol), you recover 1.34 of aspirin. Compute your percent yield of aspirin.
What is the molality of a solution of aluminum nitrate that contains 31.0 g of Al(NO3)3 dissolved in 295.0 g of water? Use molar masses with at least as many significant figures as the data given. What is the molality of each of the ions in soluti..
If 5.400 g of C6H6 is burned and the heat produced from the reaction is absorbed into 5691 g of water and 21 degrees C, what is the final temperature of the water?
Explain why the boiling point of your cyclohexane: toluene mixture rose slowly throughout your simple distillation procedure. Explain this in terms of the temerature/composition diagram
A weak acid HA (pKa=5.00) was titrated with 1.00M KOH. The acid solution has a volume of 100.00mL and a molarity of 0.100M. Find the pH at the following volumes of base added and make a graph of the pH versus Vb:Vb= 0, 1, 5, 9, 9.9, 10, 10.1, and ..
Air bags in automobiles inflate when sodium azide, NaN3, rapidly decomposses to its component elements: 2NaN3(s)-----2Na(s)+3N2(g). a)how many moles of N2 are formed by the decomposition of 2.50 moles of NaN3
the reaction between calcium metal and chlorine gas is described by the following thermochemical equation cas cl2g
Does a precipitate form? Show all calculations. Calculate the concentration of each ion at equilibrium.
Calculate the de Broglie wavelength of a Helium atom moving at a speed of 244.0 m/s.
The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 3.70 1022 atoms of Tl-206, calculate the number of such atoms left after 38.0 min.
when 2.45 g of an unknown weak acid ha with a molar mass of 85.0g mol is dissolved in 250.0g of water the freezing
In which of the following are there more than eight electrons in the valence shell of the central atom
If 2.0 x 10^23 argon atoms strike 4.0 cm^2 of wall per second at a 90 degree angle to the wall moving with a speed of 450 m/s. what pressure (in atm) does the gas exert on the wall
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