An eperiment is performed on plants to see how different liquids effect plant in the experiment is given a different liquid: water, apple juice or milk. What variable
should be kept constant/controlled? *
type of plant, soil, amount of sunlight, and flower pot
only the amount of sunlight
water, apple juice, milk
type of plant only

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

c. is the answer

by love gaming

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