Answer:
Ca^+2
Explanation:
Hence, the correct option is A.
Answer :
The concentration of 
before any titrant added to our starting material is 0.200 M.
The pH based on this ion concentration is 0.698
Explanation :
First we have to calculate the concentration of before any titrant is added to our starting material.
As we are given:
Concentration of HBr = 0.200 M
As we know that the HBr is a strong acid that dissociates complete to give hydrogen ion and bromide ion 
.
As, 1 M of HBr dissociates to give 1 M of
So, 0.200 M of HBr dissociates to give 0.200 M of
Thus, the concentration of before any titrant added to our starting material is 0.200 M.
Now we have to calculate the pH based on this ion concentration.
pH : It is defined as the negative logarithm of hydrogen ion concentration.
![pH=-\log [H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH%5E%2B%5D)
Thus, the pH based on this ion concentration is 0.698
The atomic number of the product decrease by one in the d) positron emission and the e) electron capture radioactive decay. These radioactive decays are two of three common forms of the Beta Decay which occurred when the proton released a positron and a neutron emitted an electron<span>. The Beta Decay can increase or decrease the atomic number.</span>
A.genetic modification of food helps it grow more easily in certain areas
Explanation:
The statement genetic modification of food helps it grow more easily in certain areas is a form of agricultural research that is very accurate.
Genetically modifying food is common practice in order to encourage desirable and sustainable traits in plant species.
- Drought resistant breeds can tolerate a much lower level of water in some specific areas.
- Disease resistant breeds are more adapted to outbreaks of plant epidemics.
- Overall, genetic modification of food helps them to grow and produce better.
learn more:
Genetic recombination brainly.com/question/12685192
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