8. The oxidation number of magnesium in magnesium chloride is _____.
2 answers:
<u>Answer:</u> The oxidation number of magnesium in magnesium chloride is +2.
<u>Explanation:</u>
Oxidation number is defined as the number that is assigned to an element when it gains or looses electrons. If an element gains electron, it will attain a negative oxidation number and if an element looses electron, it will attain a positive oxidation number.
The chemical formula for magnesium chloride is
We take the oxidation state of magnesium atom be 'x'.
Oxidation state of chlorine atom = -1
Evaluating the oxidation number of magnesium atom:
Hence, the oxidation number of magnesium in the given compound is +2.
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Answer : The mass of oxygen will be, 36.8 grams
Solution : Given,
Moles of water = 2.30 moles
Molar mass of = 32 g/mole
First we have to calculate the moles of oxygen.
The balanced chemical reaction will be,
From the balanced reaction we conclude that
2 moles of water decomposes to give 1 mole of
2.30 moles of water decomposes to give moles of
Now we have to calculate the mass of oxygen.
Therefore, the mass of oxygen will be, 36.8 grams