9999699999699999699999699999699999
9666696669696666696666696669666966
9999696669696666696666696669666966
9666699999696699696699696669666966
9666696669696669696669696669666966
9666696669699999699999699999666966

Highlight the numbers
Press Ctrl + F
Then press 9

5. Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several
reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes upon
contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic
microorganisms); and it foams upon contact with blood, which provides a cleansing action. In the
laboratory, small quantities of hydrogen peroxide can be pre- pared by the action of an acid on an
alkaline earth metal peroxide, such as barium peroxide:
BaO2(s) + 2HCl(aq)  H2O2(aq) + BaCl2(aq)
What mass of hydrogen peroxide should result when 1.50 g of barium peroxide is treated with
25.0 mL of hydrochloric acid solution containing 0.0272 g of HCl per mL? What mass of which
reagent is left unreacted?

░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
░░░░░░░██████╗░███████╗██████╗░░
░░██╗░░██╔══██╗██╔════╝██╔══██╗░
██████╗██████╔╝█████╗░░██████╔╝░
╚═██╔═╝██╔══██╗██╔══╝░░██╔═══╝░░
░░╚═╝░░██║░░██║███████╗██║░░░░░░
░░░░░░░╚═╝░░╚═╝╚══════╝╚═╝░░░░░░
░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░