Can someone pls help with this, full step by step process and no links please 7kg of nitrogen is 35% of a compound. The compound has a relative formula mass of 80g. How many atoms of nitrogen does it contain?

your answer is c

hope i ! ; )

personal, she chose to do it.

the answer is 75.0%.

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