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Magnesium nitride reacts with liquid water to form insoluble magnesium hyrdroxide and ammonia. What is the balanced equation for such?

A hydrate of cobalt (ii) chloride had a mass of 238.1 g before heating. After heating, the anhydrous CoCl2 weighed 130.7 g.

What is the mass of the water that was driven off?

How many moles of water were driven off?

How many moles of anhydrous CoCl2 remain?

What is the hydration number (moles of water per mole of compoud)?

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