January 2012 Chemistry Regents #75-78

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Question

Base your answers to questions 75 through 78 on the information below.

 

Vitamin C, also known as ascorbic acid, is water soluble and cannot be produced by the human body. Each day, a person's diet should include a source of vitamin C, such as orange juice. Ascorbic acid has a molecular formula of C6H8O6 and a gram-formula mass of 176 grams per mole.

77 In the space in your answer booklet, show a numerical setup for calculating the percent composition by mass of oxygen in ascorbic acid. [1]

 

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