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OpenStudy (anonymous):
When 170g of hydrogen peroxide are decomposed, how many dm^3 of oxygen are released at STP?
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OpenStudy (aaronq):
There is small shortcut you can take because the moles of \(O_2\) would be equal to the moles of \(H_2O_2\). (because of the same number of atoms. Another shortcut you can use is the fact that 1 mole of any gas at STP is equal to 22.414 L. So find moles, multiply by 22.414 L/mol.
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