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How many formula units of SiO2 are there in a quartz crystal (SiO2) that has a mass of 45.2 g? Can someone help me work this out? Did Einstein in his field equation of relatvity prove Newton gravity constant to be Universal? What is 2017 - 70 AD? How did Miles Mathis discover the the new configuration of the structure of Atoms? Calculate the number of required electrons in CO-3 ^2- and PO-3 ^3-?