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Where is energy stored in a carbon-based molecule like glucose? responses the space between atoms the space between atoms the hy

Alik [6]

Food is made up of organic (carbon-containing) molecules that contain chemical bonds between their atoms that act as energy storage units. In addition to using the energy in food to fuel life processes, organisms construct larger organic molecules, such as proteins, DNA, and fats (lipids), using the atoms from food molecules.

What is glucose ?

The primary form of sugar in the blood, glucose serves as the body's cells' main source of energy. Glucose can be produced by the body from other chemicals or it can be obtained from the meals we eat. The bloodstream carries glucose to the cells. Insulin is one of many hormones that regulate blood glucose levels.

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7 0

1 year ago

Reaction enthalpy for ethanol oxidation, C2H5OH+3O2 -> 2CO2 + 3H2O is 1257 kJ/mole. Energy content per mol fuel ______kJ Ener

MArishka [77]

Answer:

Energy content per mol fuel 1257 kJ.

Energy content per gram fuel = 27.33 kJ

Energy released per mol carbon dioxide gas formed is 628.5 kJ

Energy released per mol oxygen gas consumed= 419 kJ

Moles of carbon dioxide gas formed per 1000 kJ energy released is 1.591.

Explanation:

$C_2H_5OH+3O_2\rightarrow 2CO_2 + 3H_2O,\Delta H= 1257 kJ/mol$

1) Energy released per mole or fuel that is ethanol :

$1mol \times 1257 kJ/mol=1257 kJ$

2) Mass of 1 mole of ethanol = 46 g

46 grams of ethanol produces 1257 kJ of energy

Energy content per gram fuel :

$\frac{1257 kJ}{46 g}=27.33 kJ/g$

3) Energy released when 2 moles of carbon dioxide are formed = 1257 kJ

Energy released per mol of carbon dioxide formed:

$\frac{1}{2}\times 1257 kJ/mol=628.5 kJ/mol$

4) Energy released when 3 moles of oxygen gas are consumed = 1257 kJ

Energy released per mol of oxygen gas consumed:

$\frac{1}{3}\times 1257 kJ/mol=419 kJ/mol$

5) Energy released when 2 moles of carbon dioxide are formed = 1257 kJ

Moles of carbon dioxide gas formed per kilo Joule of energy:

$\frac{2}{1257} mol$

Moles of carbon dioxide gas formed when 1000 kJ of heat is released:

$\frac{2}{1257} \times 1000 mol=1.591 mol$

5 0

4 years ago

Choose the compound below that contains at least one polar covalent bond, but is nonpolar.

Ghella [55]

Answer:

The correct choice is the letter d. CF₄ is a compound that contains at least one polar covalent bond (four in fact), bust is nonpolar.

Explanation:

For a compound to have at least one polar covalent bond, but being a not polar compound, the geometric configuration of the molecule must lead to a symmetrical distribution of the charges. This is because, in that way, the dipoles will cancel each other, producing a null net dipole, which makes a non-polar molecule.

Consider the four given molecules:

a. SeBr₄

Since, Se has six valence electrons, and it is bonded to four Br atoms, there will be one lone electron pair which will make that the charge is not symmetrically distributed, leading to a polar molecule. so this is not correct choice.

b. HCN

HCN's structure is linear: H-C≡N.

Nitrogen is more electronegative than carbon an so it is pulling the electrons on in the triple bond with carbon (C≡N) more than the hydrogen on the other side of carbon (H-C)

Therefore, there is a net a dipole moment towards N and the molecule is polar.

c. ICl₃

This is quite evident non-symmtrical and so you quickly can predict that is is polar.

d. CF₄

This molecule has four F atoms around a C atom.

Since, F is more electronegative than F, each C - F bond has a dipole moment (negative charge is closer to F atoms). Then, whe have four dipole moments (covalent bonds) on each CF₄ molecule.

Now, since the molecule is symmetric the four dipoles will cancel each other and the compund in nonpolar.

In conclusion, the correct choice is the letter d. CF₄ is a compound that contains at least one polar covalent bond (four in fact), bust is nonpolar.

8 0

3 years ago

Organisms that have the ability to use an atmospheric gas to produce an organic nutrients are known as?

Andrew [12]

Its an autotrophs because they use carbon monoxide

4 0

3 years ago

The energy transferred between samples of matter because of a difference in their temperatures is called a. heat. b. thermochemi

Evgesh-ka [11]

Answer:

The energy transferred between samples of matter because of a difference in their temperatures is called a. heat.

Explanation:

The first law of thermodynamics establishes that when two bodies with different temperatures are put in contact they will find thermic equilibrium to a final temperature by transferring heat. Thus the correct answer is (a).

Thermochemistry is the study of the transformations of heat energy on the chemical reactions. Chemical kinetics is the study of the rate of chemical reactions. And temperature is the measure of the heat.

8 0

3 years ago