You are given 6.3 grams of magnesium to react with excess oxygen in a synthesis reaction. 2Mg+O2 > 2MgO(balanced equation) How many grams of magnesium oxide are produced?

it's c. elements are placed in rows based on how may valencies electrons have.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).