Para que o corpo humano exerça funções, comandadas pelo sistema nervoso, como correr, andar, levantar e pular, é necessário que funcionam em conjunto os: a)Músculos, tendões e encéfalo.

b)Ossos, tendões e articulações.

c)Ossos, músculos e articulações.

d)Sistema nervoso central e periférico

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

the correct answer would be b) volume versus temperature, because they are also directly proportional.