# Mixture concentration and dilution
# Scope: Two-stream mass-fraction blending, identical conserved solute.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

massA = 2 kg
fractionA = 0.1
massB = 3 kg
fractionB = 0.3

fraction := (massA*fractionA+massB*fractionB)/(massA+massB)

check concentration upper requirement: fraction <= 0.25

scenario alternative: massA = 1.6 kg