Question

37 The accepted value for the percent by mass of water in a hydrate is 36.0%. In a laboratory activity, a student determined the percent by mass of water in the hydrate to be 37.8%. What is the percent error for the student's measured value?(1) 5.0% (3) 1.8%

(2) 4.8% (4) 0.05%

Answer 1

37.8% - 36.0%= 1.8%

(3) 1.8% is the correct answer.

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