When hydrogen peroxide decomposes, what mass of hydrogen peroxide is needed in solution to produce 1.6g of oxygen gas?

please answer quickly!!!

1 Answer
anor277
Jan 30, 2018

We need a stoichiometric equation....and we need approx. #3.5*g#

Explanation:

#H_2O_2(l) stackrel(MnO_2)rarrH_2O(l)+1/2O_2(g)uarr#

This is in fact a disproportionation reaction...

#"Moles of dioxygen"=(1.60*g)/(32.00*g*mol^-1)=0.050*mol#

....and given the stoichiometry, we need #0.10*mol# hydrogen peroxide....a molar quantity of #0.10*molxx34.01*g*mol^-1=??g#

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