Chemical changes are considered unseen because they occur at the atomic level, changing the actual structure of the thing.
Answer:
it is 50
if I m right pls mark me brainliest
Biodiversiti adalah kehidupan di dunia termasuk manusia, hewan dan tumbuhan
Answer:
my answer is b oti d I am not sure
We are given with the mass of pure iron that reacts with oxygen to form an oxide which has a given mass as well. the mass of oxygen reacted is 8.15-6.25 g or 1.9 grams. THen we convert the mass of the reactants to moles. Iron is equal to 0.1119 moles and oxygen is equal to 0.1188. We divide each number to the less amount. Hence iron is 1 and oxygen is approx 1. The empirical formula hence is FeO or ferrous oxide or Iron (II) oxide.
