Both the smaller person and the bigger person are pushing the box in the same direction: to the right. The bigger person is pushing the box with a force of 50 N. The smaller person is pushing the box with a force of 20 N. What is the net force being applied to the box? a . 30 N
b . 0 N
c . 70 N
d . 50 N

a) the particles of the chair are strongly held together.

i don't know people like to fight everywhere rip.

it is a solid

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