Which of the following is not true concerning crop rotation?
a. It reduces soil compaction by turning the soil.
b. It grows different, dissimilar crops in series.
C. It prevents the depletion of nutrients by any single crop variety.
d. It improves soil structure and fertility.
Please select the best answer from the choices provided
СА
Oo

The correct answer would be A

Explanation:

The practice of rotating crops help by improving the soil stability while also helping with decreasing the life cycle of any pests that may be interfering with the crop. It helps control disease and it makes the soil fertile as well.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

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