2H2+ O2 =2H2O, how many moles of water is produced if there is 10gm of O2 gas used?

What are transitions between a liquid and gas called? identify which way they are transitioning

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.

The excretory system,need answers for all: )