How many molecules of sodium oxide will be created if 187 grams of oxygen reacts with excess sodium? 4na + o2 -> 2na2o a. 11.69 x 1023 molecules of na2o

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?