1.68g of iron is combined with 0.48g of oxygen. What is the empirical formula of the new compound?

How many grams of n2h4 will be consumed by 23 g of n2o4

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

What occurs when a cell engulfs large food particals