When iron rusts in air, iron (iii) oxide is produced. how many moles of oxygen react with 2.4 mol of iron in the rusting reaction shown below ?

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?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?