Nitrogen when combined with oxygen can form various oxides. 3.5g of nitrogen gas is burned in oxygen to form 11.5 g of an oxide of nitrogen. a) Determine the mass of oxygen burned. (HINT: the oxide contains only nitrogen and oxygen) b) Using data from the experiment find the percent of nitrogen by mass in the oxide. I'm stuck on b)! Help! :(

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

elements make up everything, and they combine to make compounds.

the answer is c