# A 4.00 gram sample of hydrate of nickel(II) bromide loses 0.793 grams of water when heated. Determine the mass percent water in the hydrate and the formula of the hydrate

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A 4.00 gram sample of hydrate of nickel(II) bromide loses 0.793 grams of water when heated. Determine the mass percent water in the hydrate and the formula of the hydrate

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Step 1

Mass of hydrated nickel bromide = 4 g

When it heated it lose water of 0.793 g from nickel bromide.

Mass of nickel bromide without water molecules Step 2

The mass percentage is calculated as the mass of a component divided by the total mass of the mixture and then multiply by 100.

The mass percentage of water is 19.82. help_outlineImage Transcriptionclosemass of water mass percentage of water -x100 mass of given compound(NiBr,.XH2O 0.793 4 -x100 19.82 fullscreen
Step 3

Mass of anhydrous nickel bromide is 3.207g.

So no. of the mole of anhydrous nickel bromide

By using equation (1), no... help_outlineImage Transcriptionclosemass (g (1) no. of moles(n) = molecular massg mol 3.207g 218.53 g mol- n 0.0146 moles n = 0.793 g n = 18 gmol- n 0.0440moles fullscreen

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