How many molecules are in 2.00 moles of h2o

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

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.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains