Question 854606
That would be expected 48% weight per weight. This site, http://www.h2o2.com/technical-library/physical-chemical-properties/physical-properties/default.aspx?pid=11&name=Density-of-H2O2-Solutions, indicates the density is about 1.19 g/ml.  That also indicates 1.45 g/ml for 100% hydrogen peroxide.


320 ml. of hydrogen peroxide is 0.32 liter of it.
{{{320*ml*1.45(gram/ml)=highlight(464*grams)}}} of hydrogen peroxide.


{{{48/100=464/S}}}, where S is the mass in grams, of HYDROGEN PEROXIDE SOLUTION, 48%.
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{{{S/464=100/48}}}
{{{S=464(100/48)}}}
{{{highlight(S=966&2/3*grams)}}} of 48% solution
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To put this into volume, {{{966&2/3*grams((1*ml)/(1.19*grams))=highlight(812*ml)}}}, which should be 810 ml, to TWO SIGNIFICANT FIGURES.