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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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3 years ago
What is the relative rate of diffusion of hydrogen and nitrogen ​
vredina [299]

Answer:

2.645

Explanation:

Rate of diffusion formula:

Sqrt(mass2/mass1)

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2 years ago
What are the chemical properties of beryllium phosphide??
o-na [289]

Answer:

Forms ionic bonds, insoluble, doesn't participate in single or double displacement reactions, non-reactive, high heat of combustion

Explanation:

Beryllium is a metal, since it belongs to group 2A, the alkaline earth metals. It has a total of 2 valence electrons.

Phosphorus, on the other hand, belongs to group 5A and has a total of 5 valence electrons.

We have a compound which has a metal in it, therefore, it's an ionic compound. Beryllium, our metal, loses its 2 electrons to gain an octet and phosphorus, our nonmetal, should gain 3 electrons to have an octet. The oxidation states are +2 and -3 respectively. This means we need 3 beryllium cations and 2 phosphide anions in our formula Be_3P_2.

Beryllium phosphide would be expected to be insoluble, as only beryllium chloride, fluoride, nitrate, phosphate and sulfate are soluble substances, while the remaining ones are expected to be insoluble.

Due to its insolubility, beryllium phosphide would not participate in any ionic reactions, such as single displacement or double displacement.

Since it's insoluble, we expect this compound to be chemically stable and not reactive. This implies that if we wanted to burn it, the heat of combustion would be very high, as a lot of energy would be needed to be supplied in an endothermic reaction in order to burn it.

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Kc = [H3O+][HCO3-] / [H2CO3]

Remember that Kc is products over reactants. Also, you do not include liquid water in a Kc expression, since liquid water has no concentration.

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2 years ago
In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains
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 the prefix of the second word indicates that a molecule of carbon dioxide indicates that the compound contains two oxygen atoms
8 0
3 years ago
Read 2 more answers
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