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Graw-Hill Education Car Connect onnectmheducation.com/flow/connect.html Saved . Ex. 117-Hydrogen Peroxide and Oxygen 2 atlemptsf Check my work Enter your answer in the provided box. Rep Dilute aqueous hydrogen peroxide is used as a bleaching agent and for disinfecting surfaces and small cuts. Its concentration is sometimes given as a certain number of "volumes hydrogen peroxide," which refers to the number of volumes of O, gas, measured at STP, that a given volume of hydrogen peroxide solution will release when it decomposes to O, and liquid H O. How many grams of hydrogen peroxide are in 0.125-L of 20 "volumes hydrogen peroxide" solution? K Prev 16 or 31 ext> ows acerExplanation / Answer
20 volume solution of hydrogen peroxide means that
1L of this H2O2 will give 20 L of oxygen at STP
2H2O2------------------------> O2 + 2H2O
2×34 g=68g 22.4 L of oxygen at STP
22.4 L of O2 at STP is produced from 68 g of H2O2
20 L of O2 at STP is produced from 60.71 g of H2O2
0.125 L O2 at STP is produced from: (0.125 x 60.71 / 20)= 0.379g of H2O2
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