The force acting between two charged particles a and b is 5.2  *  10è¢ newtons. charges a and b are 2.4  *  10èæ meters apart. if the charge on particle a is 7.2  *  10è§ coulombs, what is the charge of particle b? (k = 9.0  *  10© newton·metersæ/coulombæ)

the correct answer is answer a. a mixture

no other options make sense

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  - sprinkles

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