Please help due in 5 min timed.. (8thgrade) Will mark brainest

If a sound wave is really loud, what is be correct?

the intensity of vibration from the sound wave is very low
the amplitude of the sound wave is very low
the intensity of vibration from the sound wave is very high
the frequency of the sound wave is very high

narendra modi is currently the pm of india

explanation:

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

5.6⋅10−^19  j

do you need the explaination?