What is the percent yield of nh3 if the reaction of 26.3 g of h2 produces 79.0 g of nh3?

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Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.