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What volume of a 0.100 M HCl solution is needed to neutralize 25mL of a 0.350 M NaOH? The first and most important elements of the marketing mix? In a nuclear reaction what fraction of the parent nuclides remain after two half lives?three half lives? four half lives? Hello, can someone help me with solving integral (sin^2x-cos^2x)/(sin^4x+cos^4x) ? How many 12 cent stamp in a dozen?