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Solve for X. X^4 - X^2 - 72 = 0? Explain the formation of line spectrum in the Balmer series of hydrogen atom? If x#y= (x.y)/(x+y) then 4#3 = 4x3/4+3 =1 remainder 5 If 5#x =2 remainder 5, determine the value of x? Hey,guys.
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Here is a screenshot : http://prntscr.com/fz6d0c? How many grams of Na2CO3 will be produced from the thermal decomposition of 250.0 g of NaHCO3?