180grams of sulfur (S) reacted with an unknown amount of oxygen (O2) to produced 220g of sulfur trioxide (SO3). How much oxygen was needed? S + O2 ® SO3 Group of answer choices

Ibelieve your answer is true 

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o

There are two molecules. check the attached file for the solution.

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this .