Complete the sentence. if mass remains the same while the volume of a and the density of the substance will

Answer : If mass remains the same while the volume of a substance increases/decreases and the density of the substance will decreases/increases.

Explanation :

Density : It is defined as the mass contained per unit volume.

Formula for density :

As per question, if the mass of remains constant then the volume of a substance will be inversely proportional to the density of the substance. That means, when the volume increases, the density will be decreases and vice a versa.

Hence, if mass remains the same while the volume of a substance increases/decreases and the density of the substance will decreases/increases.

i think is conclusions.i think so

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