Answer: D, Scientists cannot predict what other unintended effects large concentrations
of iron may have.
Explanation: just took quiz ap3x
The answer to this question would be: <span>c) gonorrhea
</span>
Gonorrhea is an infection that was caused by gram-negative diplococcus bacteria named Neisseria gonorrhea. It can cause varying symptoms from purulent urine to pain in pelvic area. Other options like herpes, HIV and HPV is caused by virus, not bacteria.
Phytoplankton contribute positively in the oceanic ecosystem as they are a source of food for oceanic animals. Moreover, they remove carbondioxide from the carbon cycle and utilize it for the process of photosynthesis.
Explanation:
Hydrogen atoms contain 1 proton and 1 electron while being devoid of neutrons. When they lose their electron they form an ion or H+, a particle carrying a unit of positive charge. pH measures how basic or acidic a water-based solutions are, with a formula for pH is
pH = -log[H+].
...where pH is -base 10 log of the concentration of hydrogen ions within the solution.
Initial volume= 20 mL
Final volume= 600 mL
# of dilutions=
= 30
for a pH 2= [H+]= 
∴ [H+]= 
and pH is an antilog of [H+]= - log 
∴pH = 3.47
Learn more about pH at brainly.com/question/4981491
Learn more about pKA at brainly.com/question/11062486
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