Để khử 1800 kg quặng chứa 92% Fe2 O3 người ta dùng 1000 kg co sau phản ứng thu được 985kg sắt tính hiệu suất phản ứng giúp em vs ạ​

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the answer is barium and copper bromide

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.