How much ammonium chloride (NH4Cl), in grams, is needed to produce 1.1 L of 0.90 Maqueous solution? Record your answer with two decimal places. Write the number
only, no units.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Word equation for k(s) +h2o(l) yield koh (aq) + h2

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!