When metals react with other elements what happens to the valence electrons of the metal atoms?

Urea, co(nh2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by combustion of 1.00 x 104 grams of co2?

What type of reaction is illustrated? 2c12o5 = 2cl2 + 502

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .