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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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How many moles of chlorine are in 6.67x10^40 chlorine molecules?
sweet-ann [11.9K]
To solve for the number of moles, we simply have to use the Avogadros number which states that there are 6.022 x 10^23 molecules per mole. Therefore:
 
number of moles = 6.67 X 10^40 chlorine molecules / (6.022 x 10^23 molecules / mole)
number of moles = 1.108 x 10^17 moles



4 0
3 years ago
Read 2 more answers
50 POINTS!!!!!!!
KATRIN_1 [288]
We could reduce soil erosion and recycle phosphorus from farm and human waste so that we could help make food production sustainable and prevent algae blooms. We can also do land reclamation as well to help solve this problem. With the land, we would have to design a system to where the land could be functional again in order to plant crops, trees, also to help the wildlife that was once a part of the island. Therefore if the design is done before the mining then afterward we can do the reclamation of the land which would help the people to be able to function after the mining. It would also help the future generations that come along after the previous generations. Everyone must work together in the process in order for everyone to survive. If all this is done then the people of the island would not have to import their food. The reclamation process is the most important thing that has to be designed first whether it is land, soil, water, lakes, and clay then after plant trees, vegetation, and other forms of plants to help replenish the land after the mining is done.

I hope I helped :3
7 0
3 years ago
If an element has 3 valence electrons, what charge will likely form on its ion? Hint: It will lose those electrons. What happens
guajiro [1.7K]

Answer:

The answer to your question is: letter A

Explanation:

If an atom lose 3 electrons its charge will be positive, it will be +3

6 0
3 years ago
8.0 mol AgNO3 reacts with 5.0 mol Zn in
Yakvenalex [24]

Taking into account the reaction stoichiometry, 8 moles of Ag can be produced from 8 moles of AgNO₃ and 5 moles of Zn.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

2 AgNO₃ + Zn → 2 Ag + Zn(NO₃)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

  • AgNO₃: 2 moles
  • Zn: 1 mole
  • Ag: 2 moles
  • Zn(NO₃)₂: 1 mole

<h3>Limiting reagent</h3>

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

<h3>Limiting reagent in this case</h3>

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of Zn reacts with 2 moles of AgNO₃, 5 moles of Zn reacts with how many moles of AgNO₃?

amount of moles of AgNO_{3}= \frac{5 moles of Znx2 moles of AgNO_{3}}{1 mole of Zn}

<u><em>amount of moles of AgNO₃= 10 moles </em></u>

But 10 moles of AgNO₃ are not available, 8 moles are available. Since you have less moles than you need to react with 5 moles of Zn, AgNO₃ will be the limiting reagent.

<h3>Moles of Ag formed</h3>

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 2 moles of AgNO₃ form 2 moles of Ag, 8 moles of AgNO₃ form how many moles of Ag?

amount of moles of Ag=\frac{8 moles of AgNO_{3}x2 moles of Ag }{2 moles of AgNO_{3}}

<u><em>amount of moles of Ag= 8 moles</em></u>

Then, 8 moles of Ag can be produced from 8 moles of AgNO₃ and 5 moles of Zn.

Learn more about the reaction stoichiometry:

<u>brainly.com/question/24741074</u>

<u>brainly.com/question/24653699</u>

#SPJ1

4 0
1 year ago
Antique paintings will deteriorate more rapidly in a humid environment. Art museums will combat this by placing a desiccant into
stira [4]

233.1g

Explanation:

Given:

Formula units of FeCl₃ = 8.65 x 10²³ formula units

Unknown:

Mass of the FeCl₃ = ?

Solution:

The formula unit is the same as the amount of subatomic particles in an atom.

  1 mole of a substance = 6.02 x 10²³ formula units

 For  8.65 x 10²³ formula units; the number of moles;

  Number of moles = \frac{8.65 x 10 ^{23} }{6.02 x 10^{23} } = 1.44moles

Now to find the mass of  FeCl₃;

   Mass of  FeCl₃ = 1.44 x 162.2 = 233.1g

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

3 0
2 years ago
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