The mass of dioxin present in 2.5L of water is 2.125 grams
calculation
convert the 2.5 l to Ml = 2.5 x1000 = 2500 Ml
density of water is = 1g/ml
mass is of water is therefore = density x volume
= 2500 Ml x 1g/ml = 2500 grams
by of the below formula of calculating of % mass
that is mass of the solute / mass of the solution = % mass
let the mass of solute be represented by y
mass of solution = 2500 g
% mass = 0.085% = 0.085/100 into fraction
by subsituting in the formula
=y/2500= 0.085/100
cross multiplication
100y =212.5
divide both side by 100
y= 2.125 grams