16 and 17 with an explanation. I get how to do the others but I’m stuck on these last 2

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

In 2002, the rare earth elements mine in mountain pass, california was closed because

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space