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Solve -7m plus 20 equals -17m-10?
-7m + 20 = -17m - 1010m = -30m = -3
Where is the fastest elevator in the world?
In Taiwan, Taipei 101 the 509m or 1671ft skyscarper reaches the speed 60km ,1010m/min zipping to the 89th floor.
What is oxygen's acidity?
The reactivity of 2,2-dimethyl-5-methoxyindan-1-ol (1) and 2,2-dimethyl-6-methoxytetral-1-ol (2) radical cations has been studied both in acidic and basic solution. At pH≤4 both 1+ and 2+ undergo Cα---H deprotonation as the exclusive reaction with k=4.6×104 and 3.2×104 s−1, respectively. In basic solution 1+ and 2+ behave as oxygen acids undergoing −OH-induced α---OH deprotonation in a diffusion controlled process (k−OH≈1010M−1 s−1). An intermediate alkoxyl radical is formed which undergoes a 1,2-hydrogen atom shift in competition with C---C β-scission (with 1+) or as the exclusive pathway (with 2+). A behavior which is interpreted in terms of the greater ease of ring-opening of a five membered ring as compared to a six-membered one.Graphic
