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
Jan 30, 2018

We need a stoichiometric equation....and we need approx. 3.5*g3.5g

Explanation:

H_2O_2(l) stackrel(MnO_2)rarrH_2O(l)+1/2O_2(g)uarrH2O2(l)MnO2−−H2O(l)+12O2(g)⏐ ⏐

This is in fact a disproportionation reaction...

"Moles of dioxygen"=(1.60*g)/(32.00*g*mol^-1)=0.050*molMoles of dioxygen=1.60g32.00gmol1=0.050mol

....and given the stoichiometry, we need 0.10*mol0.10mol hydrogen peroxide....a molar quantity of 0.10*molxx34.01*g*mol^-1=??g0.10mol×34.01gmol1=??g