February 2019 0 40 Report
Uzgodnij współczynniki zapisanych reakcji:

Reakcja a) .....O² + .....Mg = .....MgO

Reakcja b) ......K + ......H²S = ......K²S + .......H²

Reakcja c) .........O² + .......Fe = ......Fe²O³

Reakcja d) ..........NH³ + .........O² = ...........N² + ..............H²0
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