Use the periodic table to answer the following questions: atoms of which element contain 25 protons? magnesium (mg) aluminum (al) tin (sn) manganese (mn) which element has an atomic number of 16? oxygen (o) sulfur (s) germanium (ge)

The naswer to the first question is Manganese and the second is Sulfur

no. of protons = atomic no.

atom w/ 25 protons is manganese Mn

element w/ atomic no. 16 is sulfur S

answer; i do believe the correct answer is (river); /// good luck

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