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Troyanec [42]
3 years ago
15

runners often eat a big meal of pasta before a big race. which molecules in the pasta increase the runner’s energy

Chemistry
2 answers:
masya89 [10]3 years ago
5 0
The molecules of carbohydrates (carbon, hydrogen and oxygen) are the responsible to produce energy in our bodies as result of the metabolism (chemical reactions that occur in our body).
Firlakuza [10]3 years ago
3 0

Answer:

Starch

Explanation:

Pasta is made of eggs and flour. The eggs are basically water, proteins and fats while flour is composed by starch.

Starch is a macromolecule that is composed of two polysaccharides, amylose and amylopectin, which are big chains of glucose, so starch is a carbohydrate. Carbohydrates are the biggest source of energy to the body, then, the starch will be the molecule in the pasta that increases the runner’s energy.

Bear in mind that proteins and fats also give energy but, as the starch is in greater proportion it will provide more energy to the runner.

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Which of the following have the most similar properties?
rjkz [21]

Answer:

             Option-B (Carbon and Silicon)

Explanation:

                  Among the given pairs only carbon and silicon have the most similar properties. This is because,

Sodium and Magnesium belong to different groups. Sodium present in Group I has one electron in its valence shell and capable of transferring only one electron while, Magnesium present in Group II have two electrons in its valence shell and is capable of donating two electrons. Hence, both show different properties.

Example:

                                           2 Na  +  Cl₂    →     NaCl

                                           Mg  +  Cl₂    →    MgCl₂

As shown in reactions when Sodium and Magnesium are treated with Cl₂ they give a products with different proportions.

Carbon and Silicon show almost same properties because both belong to Group IV hence both are capable of forming four bonds. Also, they share the same property of self linkage in making a long chains.

Argon and Chlorine also belong to two different groups. Argon is present in Group VIII (Noble Gases) and Chlorine is present in Group VII (Halogens). Hence, Argon is an inert specie which is non reactive while Chlorine gives different reaction easily.

Potassium and Calcium belong to different groups. Potassium present in Group I has one electron in its valence shell and capable of transferring only one electron while, Calcium present in Group II have two electrons in its valence shell and is capable of donating two electrons. Hence, both show different properties.

Example:

                                           2 K  +  Cl₂    →     KCl

                                           Ca  +  Cl₂    →    CaCl₂

As shown in reactions when Potassium and Calcium are treated with Cl₂ they give a products with different proportions.

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3 years ago
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