50. Solving a chemistry problem

184. Two weighings of SiHCl3 weighing 10 g, one of which was injected with 0.0200 μg Ta2O5, decomposed HF, added rhodamine 6G, and extracted the formed ion associates [BH+][TaF6-] with benzene. The fluorescence intensity of the obtained extracts (Ix, Ix+Δ), as well as the extract of the control experiment (I0) was measured on a fluorimeter and the following results were obtained (c.u.): I0 = 4.0; ix = 16.0; Ix+Δ = 22.0. Calculate the mass fraction (ω,%) of Ta2O5 in SiHCl3.