N2+ 3 h2 -> 2 nh3 if 12.0 g of h2 reacts with excess n2. then what mass of nh3 will be produced?

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Which element is the least metallic between cadmium, silver, zinc, or iron?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5