Glucose testing, continued. shelia’s measured glucose level one hour after having a sugary drink varies according to the normal distribution with μ = 122 mg/dl and σ = 12 mg/dl. what is the level l such that there is probability only 0.05 that the mean glucose level of four test results falls above l? (hint: this requires a backward normal calculation. see page 91 in chapter 3 if you need to review.)

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

answerambulatory;