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Ber [7]
3 years ago
8

Tar contained in tobacco smoke is harmful to the lungs because it

Biology
1 answer:
Oksana_A [137]3 years ago
5 0
The answer is = a stimulant
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The compound sodium chloride is formed by which kind of bond? Covalent bond ionic bond hydrogen bond sodium bond
ehidna [41]

<u>Answer</u>: Ionic bond

<u>Explanation</u>:

  • An ionic bond is a type of a chemical bond formed by the complete transfer of electrons from one atom to another atom i.e one of the atoms loses its electrons and the other gains it. This results in the formation of 2 oppositely charged ions.
  • In sodium chloride, sodium loses one electron from its outermost shell (valence shell) whereas chloride gains it. Due to this sodium gains, a net positive charge and chloride gain a net negative charge.
  • So, due to the complete transfer of electrons that takes place from sodium to chloride, the compound generated (Sodium chloride) has an ionic bond.
7 0
3 years ago
Identify the items that are part of an ecosystem. Check all that apply.
Alika [10]

Answer:

An ecosystem includes the ways these organisms live, feed and reproduce within that particular area. Ecosystems contain many components, but the four main things needed in an ecosystem are plants, animals, rocks and minerals, and water.

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3. What is the role of mRNA in expressing specialized structures?
Fiesta28 [93]

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MRNA ou RNA?

Explanation:

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What 2 atoms are present in all organic molecules
Liula [17]
I think carbon and hydrogen.
3 0
3 years ago
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This is data from a visible satellite image. What types of weather conditions are associated with the image?
masya89 [10]
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6 0
3 years ago
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