Cho 11,2 gam FE tác dụng với 34g AgNO3 trong dung dịch . Khối lượng kim loại thu được và khối lượng chất dư lần lượt là bao nhiêu

no but i do not usually comment or use my voice that much when it comes to social media

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

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.