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If a chemist has 9.2 moles of N2H4O3 what is the mass of the sample? How many chloride ions are in 0.28 mol MgCl2? As os 2014, approximately how many programs were accredited by NAEYC? A submarine first went down to 725 feet below sea level. It then went up 150 feet. what was the final depth of the submarine? What is the partial derivative for f(x,y)=(-(2x+y))^7. For fx(x,y) and fxy(x,y)?