Element Na when not bonded to another element has an oxidation number of ?
A)2 B) 1 C) 0 D) 4

Find the mass in grams of 1.37x1020 particles of h3po4

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)