A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 ml of stock solution. A 10.00 ml sample of this stock solution is added to 50.00 ml of water. Calculate the concentration (in molarity) of ammonium ions and sulfate ions in the final solution

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

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!