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The variance of five numbers is 10 if each number is divided by two then the variance of new numbers is.? Aluminum chloride decomposes to produce aluminum and chlorine. How many molecules of chlorine are produced from 10.0g of aluminum chloride? Is the sky really falling? Simplify the rational expression (x-5) - (x^2-6x +8) X (x^2+3x +2)/ (x-7) - (x^2+8x +7) X (x^2- 11x +28) identify all non permissible values? Zinc reacts with hydrochloricacid to produce zincchloride and hydrogen. What volume of hydrogen is produced if you start with 2.5g of zinc?