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The ammonia-borane adduct (H 3 N → BH 3) is given as a classic example: the bond is weak, with a dissociation energy of 31 kcal/mol (cf. 90 kcal/mol for ethane), and long, at 166 pm (cf. 153 pm for ethane), and the molecule possesses a dipole moment of 5.2 D that implies a transfer of only 0.2 e – from nitrogen to boron.
"Tu casa" (tú with an (acute) accent is the subject pronoun, tu with no accent is a possessive adjective) means "your house" in the familiar singular: the owner of the house is one person, and it is a person with whom one has the closer relationship the tú form implies.
Graphite and the mica group of silicate minerals structurally consist of continuous two-dimensional sheets covalently bonded within the layer, with other bond types holding the layers together. [3] Disordered network solids are termed glasses. These are typically formed on rapid cooling of melts so that little time is left for atomic ordering ...
[2] [3] The term covalent bond dates from 1939. [4] The prefix co-means jointly, associated in action, partnered to a lesser degree, etc.; thus a "co-valent bond", in essence, means that the atoms share "valence", such as is discussed in valence bond theory. In the molecule H 2, the hydrogen atoms share the two electrons via covalent bonding. [5]
"Eres tú" (Spanish pronunciation: [ˈeɾes ˈtu]; "It's You") is a song recorded by Spanish band Mocedades, written by Juan Carlos Calderón. It represented Spain in the Eurovision Song Contest 1973 held in Luxembourg placing second which was followed by a global success.
TB-3 after emergency landing during the Winter War in March 1940 . The TB-3 was an all-metal aircraft of steel construction, as one of the designs from Andrei Tupolev's design bureau to be based on the 1918-onward all-metal aircraft design practices and technology pioneered by Hugo Junkers.
"A far l'amore comincia tu" (Italian pronunciation: [a fˈfar laˈmoːre koˈmintʃa ˈtu]; "You start making love first") is a song by Italian singer Raffaella Carrà from her album Forte forte forte (1976).
January 3, 2003 – January 3, 2009 108th 109th 110th: Elected in 2002. Re-elected in 2004. Re-elected in 2006. Lost re-election. 2003–2013 Part of Clark: Dina Titus : Democratic: January 3, 2009 – January 3, 2011 111th: Elected in 2008. Lost re-election. Joe Heck : Republican: January 3, 2011 – January 3, 2017 112th 113th 114th: Elected ...