How many phosphorus atoms are there in 2.57g of this element?

How many phosphorus atoms are there in 2.57g of this element? phosphorus 英语懂的 来拿分 11.How many neutrons and pro tons are in an atom of phosphorus11.How many neutrons and pro tons are in an atom of phosphorus-31,atomic number 15,and determine how many electrons should be in the first,second,third,and fourth en how many how many, how many how How Many Times,How Many Lies 歌词 How many?的中文. how many的中文 cakes many how how many bears are how many中文意思 How many bears how many minutes do How many derks are how many planes是什么意思 how many造句 用How many 造句,