Ud. analiza 1.5 kg de una muestra de agua contaminada con Cr+6 (Cromo hexavalente), causante de la muerte de peces en un lago y concluye que tiene
una concentración de 67 ppm. ¿Cuántos mg de Cr+6 (Cromo hexavalente) tiene
la muestra?

Idon't know hope someone you

Not a  mixture of two common elements that can be separated by physical means.

Polymerization reaction

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.