Zn + 2 hcl --> zncl2 + h2 how many moles of hydrochloric acid (hcl) are used (assume a complete reaction) if 8.3 moles of zinc chloride (zncl) are produced? a 8.3 mol zncl2 b none of these answers c 8.3 mol hcl d 4.15 mol hcl e 16.6 mol hcl

Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?

Which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?