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Dafna1 [17]
3 years ago
13

Scientists interested in early life on Earth including the first cells and the last universal common ancestor of all three domai

ns of life are likely to get the most information from:
a. sis of two amino acids, forming a peptide bond with the release of water
b. the reaction of two monosaccharides, forming a disaccharide with the release of water
c. the reaction of a fat with glycerol, forming fatty acids with the release of water
d. the reaction of a fat, forming glycerol and fatty acids with the consumption of water
Chemistry
1 answer:
jonny [76]3 years ago
7 0

Answer: A. sis of two amino acids, forming a peptide bond with the release of water

Explanation: Molecule Evolution is a term used to explain the changes that has taken place as organisms evolve from one generation to the next.Molecular evolution is connected with the Amino acid sequence and synthesis as every ancestor of man have certain closely related or changes which must have caused evolution to take place. the formation of peptide bonds from amino acids with the release of water is the closest option Scientists can use to explain the evolution of man.

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Given one mole of each substance, which of the following will produce the FEWEST particles in aqueous solution? 1. sodium nitrat
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<u>Answer:</u> The substance that produces fewest particles is CH_2Cl_2

<u>Explanation:</u>

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

Covalent compounds do not dissociate into ions when dissolved in aqueous solution.

For the given options:

  • <u>Option 1:</u>  Sodium nitrate

The chemical formula of sodium nitrate is NaNO_3

The ionization reaction for the given compound follows:

NaNO_3(aq.)\rightarrow Na^+(aq.)+NO_3^-(aq.)

This produces in total of 2 ions.

  • <u>Option 2:</u>  CH_2Cl_2

The given compound is a covalent compound and do not dissociate into its ions. It remains as such as a single unit.

  • <u>Option 3:</u>  K_2SO_4

The chemical name for the given compound is potassium sulfate.

The ionization reaction for the given compound follows:

K_2SO_4(aq.)\rightarrow 2K^+(aq.)+SO_4^{2-}(aq.)

This produces in total of 3 ions.

  • <u>Option 4:</u>  Sodium phosphate

The chemical formula of sodium phosphate is Na_3PO_4

The ionization reaction for the given compound follows:

Na_3PO_4(aq.)\rightarrow 3Na^+(aq.)+PO_4^{3-}(aq.)

This produces in total of 4 ions.

Hence, the substance that produces fewest particles is CH_2Cl_2

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