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.

which formula represents the empirical formula for ascorbic acid?

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol