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In the complex ion [Cr(C2O4) 2(H2O) 2]-, what is the oxidation number of Cr?
Q17: Indicate whether a statement is true or
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Q37: Ozone protects us from ultraviolet light by<br>A)
Q52: Which of these elements is not found
Q63: In complexes of transition metals, the maximum
Q80: Due to a highway accident, 150 L
Q82: Which of these compounds does not follow
Q86: Name the three component parts of a
Q101: What products are formed from the reaction
Q105: The main effect of the biosphere on