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I just wanted to clarify anwsers.

Question
23. Nucleotides contain phosphate groups bonded to the..
A) C3' or c5' atoms
B). C3 or C3' atoms
C). N1 or N9 Atoms
D). C3 or N9 atoms
E). C3 or C5 atoms
The anwser that I chosen in A.
QUESTION 19. When the hydrogen ion concentration of a solution increases,
A). The hydroxide ion concentration increases and the pH increases
B). The hydroxide ion concentration decreases and the pH increases.
C). The hydroxide ion concentration decreases and the pH decreases
D). The hydroxide ion concentration increases and the pH decreases.
I picked B?
Please help

Thanks.

thanks for?

For the chemistry teacher who will answer your questoin.

For the second question, I think you choice B is correct.

so do you think the first one is wrong?

Since so far no chemistry teacher has taken notice of this post, could you repost both questions, but make sure you put "Chemistry-repost" as the subject?

Thank you.

To clarify the answers for the given questions:

Question 23: Nucleotides contain phosphate groups bonded to the C3' or C5' atoms. You have chosen option A, which is correct. The phosphate group in a nucleotide is attached to the sugar molecule at either the C3' or C5' position.

Question 19: When the hydrogen ion concentration of a solution increases, the correct answer is option D. The hydroxide ion concentration decreases, and the pH decreases. Increasing hydrogen ion concentration means more acidic conditions, and as the pH scale is logarithmic, a decrease in pH value indicates increased acidity.