Cuales son todas las propiedades periodicas

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Why does his teacher ask him to balance the equation by including the correct coefficient