- How many atoms of platinum are in 87.18 grams of platinum (ii) phosphite?

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Find B in [0,pi] and real number C such that cot theta=C tan(theta-B).? 4tan^-1 1/5 -tan^-1 1 /239 is equal to? At 70°C, the pH of water is 6.41. What is the ion-product constant of water, Kw, at 70°C? If order of abc matrix is 4*3,4*5,7*3 then (a^t.b^t)^t =c^t then what is order by solving proved it. these are transpose? Zip code of Tehran Iran?

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