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Question: Draw a structure containing only carbon and hydrogen that is a chiral alkyne with six carbon atoms. (Wedge/dash bonds are omitted for simplicity.)
why is the ortho-form of the diamine, and why is the ortho- form of the diamine a hindering impurity that must be rigorously removed before the production of Kevlar and Nomex?
Balance the equations and indicate the type of reaction. CaO+ HCl -> CaCl2 +H2O. and also, Fe + O2 -> FE2O3
1. calculate the freezing point and the boiling point of a solution prepared by dissolving 5.0 g of kclin 550 g of
consider 25.0 g of water at 21.7degc that are mixed with 25.0 g of water at 43.3degc in a foam cup calorimeter. the
A solution of the weak acid, HF, and a solution of the strong acid, HCl, have the same pH. Which solution will require the most sodium hydroxide, NaOH, to neutralize
Which statement is not true about fission? Answer a. process requires initiation by a neutron b. products have smaller nuclei than reactants c. combination of atomic nuclei d. critical mass produces a chain reaction
Extraction procedures have shown that nitrogenase contains an iron-sulfur cluster, Fe4S4, where the atoms of each type are arranged alternatively at the corners of a cube.
You need to dilute 30.0 mL of a 2.50 M NaCl solution to make a .500 M NaCl solution. what is the volume of diluted solution after you add water
determine the freezing point depression, delta Tf, for the ionic solution. b. determine m effective for ionic solution. c. determine the van't Hoff factor, i, for the ionic compound.
Arrange the subsequent substances in the order of increasing entropy at 25 degrees Celsius. HF(g), NaF(s), SiF4(g), SiH4(g), Al(s). Lowest to highest.
Calculate the work (in kJ) when 2.60 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K: 2Na(s) + 2H2O(l) ? 2NaOH(aq) + H2(g)
1. how many times would a mole of timbits placed end to end reach from here to mars and back. distance from earth to
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