You add 7.8 g of iron to 20.70 ml of water and observe that the volume of iron and water together is 21.69 ml . calculate the density of iron.

What reaction is taking place? 02 + c3h8 = h20 + co2

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!

Why do lunar and solar eclipse not happen every month