13. complete the following sequence.
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14. explain how the dna molecule stay stable?
15. how many hydrogen bonds pairs between adenine and thymine?
16. how many hydrogen bonds pairs between guanine and cytosine?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

Calculate the molarity of the solution. 6.02 x 1022 molecules of hci (molecular weight = 36.5 g/mole) in 2.0 liters of water m

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.