Selenium dioxide, a medicine that is used for the treatment of stroke, hardening of arteries, and cancers, is prepared by a reaction of selenium with hydrogen peroxide:
2H2O2 + Se → SeO2 + 2H2O
How many moles of H2O2 are required to produce 11g SeO2 according to the equation?
"2H_2O_2 + Se \u2192 SeO_2 + 2H_2O\\\\"
11g of SeO2 = 11/111 = ~0.1 mole
2 moles of H2O2 reacts with one mole of SeO2
"\\therefore" 0.2 moles of H2O2 is needed for the reaction.
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