Chemistry Weekly Newsletter - Monday, August 31, 2015

Top new questions this week: Why are isotopes of hydrogen the only ones with special names? Why does no other element but hydrogen get special names for its isotopes? nomenclature hydrogen isotope   asked by Abhirath Anand 19 votes answered by jerepierre 17 votes Are long Oxygen molecules possible? Are large oxygen containing molecules possible? Either large rings, or chains with hydrogen atoms at the ends. Like this: $\ce{H-O-O-O-O-O-O-O-O-O-... -O-O-O-O-O-H}$ molecules   asked by Cano64 14 votes answered by ron 10 votes Why water spills on our shirt change its colour? While drinking water, some of it fell on my shirt and as usual, as has happened to many of us, the colour darkens? So why does this happen ? Is it due to some chemical effect or physical one ? everyday-chemistry   asked by Pi5 12 votes answered by santiago 18 votes Why is trans-cyclooctene chiral? How does trans-cyclooctene exhibit chirality if there are no stereocenters? See follow-on questions: (1) Are all higher cycloalkenes chiral? (2) Do more double bonds cause a bigger number of ... stereochemistry chirality   asked by Marko 10 votes answered by א_ϵ 13 votes Is Hydrogen Bonding a Type of Dipole Dipole Interaction I understand that dipole dipole forces is due to the attraction of the different partials charges of atoms in different molecules due to their different electro-negativities. For example in ... quantum-chemistry intermolecular-forces dipole hydrogen-bond   asked by Nanoputian 7 votes answered by Pradnya -3 votes What advantages does the mole have over counting large numbers using SI prefixes? I'm trying to understand why chemists use the mole unit instead of just counting and using SI prfixes to simplify the big numbers with units such as zetta- or yotta-molecules (yotta=10^24). Here's ... mole   asked by user1318499 6 votes answered by Jan 3 votes What does a square mean in a chemical formula? We find in the book Minerals and their Localities by Jan H Bernard and Jaroslav Hyrsl several chemical formulas containing a square. What does this square means? An example: Franciscanite $\ce{Mn3 ... inorganic-chemistry nomenclature   asked by André Audet 6 votes answered by Todd Minehardt 5 votes Greatest hits from previous weeks: reason for the stronger acidic property of phenol than alcohol "In phenol, pulling the $p_z$ electrons from the oxygen atom into the ring causes the hydrogen atom to be more partially positive than it is in aliphatic alcohols. This means it is much more easily ... acid-base aromatic-compounds   asked by Eliza 11 votes answered by G M 10 votes What is the definition of of 'compound', 'mixture', 'element' and 'molecule'? I am looking for the precise definitions, as I am very confused as to what they are exactly, because although I mostly understand what they mean, I have encountered some conflicting definitions that ... homework terminology   asked by Sophia 14 votes answered by Anti Earth 10 votes Can you answer these? Why does water donate a proton to ammonia instead of accepting one? Water can donate a proton to $\ce{NH3}$ when they react. Why doesn't water accept a proton from $\ce{NH3}$? Why does water have a tendency to donate protons when reacting with $\ce{NH3}$? acid-base aqueous-solution   asked by silenceislife 2 votes How is LAH a stronger reducing agent than NaBH4? Here's a list of organic compounds reduced by the two: $\ce{NaBH4}$ reduces: Aldehydes, Ketones, Acid Chlorides, Alkyl Halides $\ce{LiAlH4}$ reduces: Aldehydes, Ketones, Acids, Acid Chlorides, ... organic-chemistry reaction-mechanism redox reactivity   asked by Technotoes 1 vote Reading enthalpy of mixing graph I'm struggling to interpret enthalpy of mixing data. Given this plot, from this paper, say I want to calculate the heat released from mixing 0.29 mol of 7.7% ethanol with 0.71 mol of 28.7% ethanol to ... physical-chemistry mixtures   asked by ericksonla 1 vote

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