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What are all the coefficients of the expression 2+6a? How many miles is 7.84 km? What would the formula be written out for Sn(HPO4)2 . on endmemo it says Tin(IV) Hydrogen Phosphate , but wouldnt it be Tin(II)? What is the derivative of the sqrt of 2x? The book says the answer is the sqrt of 2/2•sqrt x. But I keep getting 1/sqrt(2x).? What element loses electron when solid magnesium reacts with liquid bromine?