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98 g of ethylene glycol (C2H6O2) are dissolved in 715 g of water. The freezing point constant (Kf) of water is 0.81°C·kg/mole. Determine the freezing point of the solution. (°C)
Decomposition of KClO3 is sometimes used to prepare small amounts of O2 in the laboratory: 2KClO3(s) 2 KCl(s) + 3 O2(g). How many grams of O2 can be prepared from 4.50 g of KClO3?
in order to purify a certain protein you require 0.1m glycine buffer at ph 9.4. unfortunately your stock room has run
10 g of methane (CH4) is combusted in a calorimeter that has an empty heat capacity of 18 J/°C. The calorimeter contained 150 g of water.
Silver has two naturally-occurring isotopes with masses of 106.905092 amu and 108.904756 amu. What are the percent abundances of each isotope, respectively?
How much heat in kJ is absorbed when 63.7 g H2O at 100C is converted to steam at 100C?
rank the following compounds in order of decreasing vapor pressure. rank from highest to lowest vapor pressure. to rank
Calculate the molarity and the molality of an NH solution made up of 28.0 g of NH in 70.0 g of water. The density of the solution is 0.982 g.
The rate constant of a reaction at 28°C is 0.064 /s. If the frequency factor is 1.9 1013 /s what is the activation barrier
In the following reaction: A + 2B --> 3C + D the MM(A) = 75 g/mol, MM (B) = 52 g/mole, MM(C)= 87 g/mol. If 250g of A and 310g of B combined, what is the limiting reagent, and what is the theoretical yield of C in gram
the three species n2 co and cn- are isoelectronic. comment on the location of any formal charges in these moleculesion
Initially a container contains 0.46 M HI and no product. What is the equilibrium concentration of H2
stilbene isomerizes to isostilbene when dissolved in benzene with an appropriate catalyst. isostilbene also isomerizes
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