100 POINTS - A sample of crushed rock is found to have 4.81 x10^21 atoms of gold, how many moles of gold are present in this sample? SHOW WORK INCLUDING FORMULA : THANK YOU

it would be 349.23

Explanation:

please mark brainliest ty

elements make up everything, and they combine to make compounds.

the answer is c

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