Upon decomposition of 340 g of hydrogen peroxide, _ l of oxygen is formed.

Write the reaction equation 2Н2О2 = 2Н2О + О2. Calculate the amount of the substance according to the formula m | M H2O2 340g / 34g / mol = 10 mol. We determine the amount of oxygen substance from the ratio by the reaction equation and by the condition. According to the equation, the ratio between H2O2 and O2 is 2 to 1, which means the amount of oxygen substance = 5 mol. Calculate the oxygen volume by the formula V = Vm * n (amount of substance). V (O2) = 5 mol * 22.4 L / mol = 112 L