Select the correct statement below concerning the antarctic ozone hole. group of answer choices the earth's tilt ensures that the antarctic is constantly receiving direct sunlight. the antarctic ozone hole is the largest in late march. there are more cfcs in the southern hemisphere, resulting in the large antarctic ozone hole. polar stratospheric clouds assist in the generation of chlorine containing compounds that are photosensitive.

answer; talc and gypsum;

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the answer is barium and copper bromide

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