Completa el espacio en blanco con la mejor respuesta.
Daniel__Rosa son hermanos.
es
ya
aunque
Y

Translate this to spanish .sometimes a (un) teacher is mean.

Select the letter from the list that best fits the definition (be) h r s x z y f b

Achemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. what is the value of x, the acid concentration of the first solution