- How many grams of oxygen are in 4.24×1023 formula units of (NH4)2SO4?

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A microscope has a x10 eyepiece, when using a x40 objective what is the effective magnification? Amadou Seck? What job can i have without taking a chemistry class in college but still make a good amount of money? In maths exam says is it true that a number is squared , the answer is always larger . explain ? La reaccion de sintesis y la de descomposicion pueden ser exclusiones entre si y por que ayuda?

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