Answer:
Co2O3 esa es la formula creo espero que te sirva
B and d will work out and a and c will also work out
The answers that are correct are a, b, and d
The answer is A: fleas and cats.
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.