What is the IUPAC name of (CH3)2NC2H5?
A) ethyldimethylamine
B) dimethylethylamine
C) N,N-dimethylethanamine
D) none of these
C
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The mineral halite has cube-shaped crystals because
A. of the arrangement of atoms in the crystal lattice. B. there are no planes along which the mineral can break. C. cubes are the most common way two tetrahedron can join. D. halite is soluble in water.
The world's second-fastest-growing energy resource is ____.
A. hydroelectric dams B. wind power C. nuclear power D. coal-fired power plants E. tidal energy
What are two major agencies that promote development in poor nations? How do they carry out their work?
What will be an ideal response?
The North Pole has a higher noon Sun Angle that New York City on this date.
June 21 March 21 September 21 none of these