timer Asked: Apr 19th, 2017

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1.sodium tetraborate is produced according to the following reaction (molar masses are given beneath each substance): 4H3BO3 (61.83 g/mol) + 2NaOH (40.00 g/mol) = 7H2O (18.02 g/mol) +Na2B4O7 (201.22 g/mol). a) How many moles of H3BO3 would be needed to make 3.50 moles of Na2B4O7?

b) how many moles of O2 are required to make 97.0 grams of K2CrO4

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