Carry brake fluid from the master cylinder to the brake units.
a. double-walled steel lines
b. rubber hoses
c. double-walled steel lines and flexible hosesd. none of the answers listed

C. Double-walled steel lines and flexible hoses

Explanation:

The brake units consists of;

Double-walled steel lines carry the brake fluid from the master cylinder along the vehicle frame to flexible hoses attached to wheel cylinders.

icc, international association for cereal chemistry

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