Scientists noticed that the frogs in smith lake were much larger than the frogs in lake martin. smith
lake is non-polluted, fresh water, whereas the water quality in lake martin is low due to contamination
with pesticides. in the experiment, tadpoles of the same age were collected, along with the same amount
of water from each reservoir. the tadpoles were allowed to mature for 3 weeks and their growth was
compared

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

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

idk i'm not smart

explanation:

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