Помогите пожалуйста .  Уровняйте уравнения и назвать вид связи. 1) Al+O2 , 2) Hg O, Na+HNO3,  3) H2O+SiO2, 4) Zn+ H2S, 4) KOH+H2SO3,  5) Fe+Cl2
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