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20 October, 15:44

You feed a canned dog food that is 75% moisture. When analyzed, it contained 30% crude protein and 1.20% calcium on a dry matter basis. If you feed 681 grams (1.5 pounds) of this dog food per day to your Collie pup, how many grams of calcium is your dog consuming each day?

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  1. 20 October, 16:27
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    To solve the problem, let us note that the calcium percentage no longer considers the moisture content of the canned dog food. Taking the 75% of the sample 681 grams results in a moisture content of 510.75. This is "removed" from consideration and we're left with 170.25 grams which we multiply with the given (dry basis) percentage of calcium to get 2.043 grams of Calcium.
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