Medstudy - לימודי רפואה בחו"ל

Why? answeer 1 answer 2 answer 3

What is the formula of the compound whose name is ammonium nitrite? (NH4)2NO2 (NH4)3NO2 NH4NO2 NH4NO3 no answer is correct

What is the oxidation number of iron in the compound whose formula is Fe2O3? III IV V II no answer is correct