Answer: Tú is less formal than usted.
Explanation:
Answer:
The Wurtz reaction, named after Charles Adolphe Wurtz, is a coupling reaction in organic chemistry, organometallic chemistry and recently inorganic main-group polymers, whereby two alkyl halides are reacted with sodium metal in dry ether solution to form a higher alkane.
Explanation:
Answer:
Los helechos semilleros son el grupo más antiguo de plantas semilleras.
Explanation:
Sólo se conocen de fósiles.
Answer:
correcto
Explanation:
"Nosotros tenemos mucho dinero"
no tiene tildes
