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NARA [144]
3 years ago
8

Name two elements, compounds and mixtures that are essential for living organisms. Also write why are they essential?​

Chemistry
2 answers:
Butoxors [25]3 years ago
8 0

Answer:

Elements-

  1. Oxygen is essential for living organisms to survive.
  2. Carbon dioxide is essential for the survival, growth and reproduction of living things. Plants obtain carbon from the atmosphere in the form of carbon dioxide, which they need for photosynthesis. They convert inorganic carbon into organic carbon in the form of sugar and starch, which they add to their tissues.

Compounds-

  1. Water is essential for living organisms to stay hydrated.
  2. Carbohydrate and protein- These compound are used to form new cells and tissues and to repair.

Mixtures-

  1. Blood is very much important for the transportation of oxygen in living organisms.
  2. Blood plasma is an example of a homogeneous mixture. This is a colourless fluid that holds the blood cells in suspension. It makes up a little more than half of the volume of human blood.

svlad2 [7]3 years ago
5 0

elements:

calcium : for strong bones

Iron : maintaining haemoglobin for metabolism

compunds

sodium chloride : to maintain blood pressure and other life processes

Adenosine Triphosphate: for metabolism, to maintain rate of inhalation and exhalation of oxygen and to supply energy

Mixture:

I) gasoline : used as fuel

ii) cement : used in construction

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Hydrogen +

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If salt (5. 99 × 10–6 mol) is dissolved in 1. 50 × 10–2 L of water, which expression can be used to find the molarity of the res
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Molarity can be defined as the moles of solute in a liter of solution. The molarity of the salt solution is \rm \bold{3.99\;\times\;10^{-4}\;M}.

<h3>What is the relation between moles and volume?</h3>

The moles are the mass of substance with respect to the molar mass. The moles and volume relationship can be expressed in terms of molarity.

The molarity can be expressed as:

\rm Molarity=\dfrac{Moles}{Volume}

The given solution has,

  • Moles of salt = \rm 5. 99\;\times\; 10^-^6
  • The volume of solution = \rm 1.50\;\times\;10^-^2 L.

Substituting the values for molarity as:

\rm Molarity=\dfrac{5.99\;\times\;10^{-6}}{1.50\;\times\;10^-^2\;L}\\ Molarity=3.99\;\times\;10^{-4}\;M

The molarity of the solution is \rm \bold{3.99\;\times\;10^{-4}\;M}. Thus, option C  is correct.

Learn more about molarity, here:

brainly.com/question/12127540

4 0
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Now
crimeas [40]

Answer:

✔️Ionic bonds form between metal atoms and nonmetal atoms.

✔️The less electronegative atoms transfers one or more electrons to the more electronegative atom

✔️The metal atom forms a cation and the nonmetal atom forms an anion.

✔️The attraction between ions with an opposite charge forms an ionic bond.

Explanation:

Ionic bond refers to the bond formation which occurs when there is complete and permanent transfer of electrons from one metal atom to another non-metal atom. The metals, which are electropositive (less electronegative) loose their electrons while the non-metals, which are less electropositive (more electronegative) gain the electrons.

When the metal atom looses electrons, they form cations(become positively charged) while non-metal atom forms anions (become negatively charged). When the opposite charges attract each other, they form ionic bond.

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