<span>as you have lost some solid, your measured mass when you were done heating it will be smaller than it should be. therefore it will be smaller relative to the initial mass (that you have taken at start) of the hydrated solid. So % water which you calculate will be higher than it should be.
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Heterogeneous mixtures are not similar throughout. Milk, the cake mix and smoothie are homogeneous mixtures because they have a uniform consistency throughout.
The only answer in this is D) mixed nuts.
Hope this helps! :)
