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3 years ago

In nature, atoms typically form molecules and are usually never in isolation

2 answers:

7 0

True. A good example of this is oxygen, which is found in nature as O subscript(the little number) 2. They can break and creates molecules that are compounds, for example H subscript 2 O.

Readme [11.4K]3 years ago

4 0

Answer:

True

Explanation:

- When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule.

- Atoms are made up of electrons, neutrons, and protons. Due to the charges in the atom, that is how the atom stays together, by attraction of the electric charges present in the atom.

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Which of the following events would be considered a rising action in the short story "The Lady, or the Tiger?"

Elenna [48]

Answer:Which of the following events would be considered a rising action in the short story "The Lady, or the Tiger?"

Explanation:

The rising action is the main first part of the story thats stars someting.

8 0

3 years ago

A molecule of chlorine has atoms of the same element, and a molecule of carbon dioxide has different kinds of atoms, chlorine is

Sergio039 [100]

Answer;

Chlorine is an element while carbon (iv) oxide is a compound.

Explanation;

-An element is a pure substances that is made up of similar types of atoms. Elements unlike compounds can not be divided into simpler forms using chemical means. Examples of elements include; potassium, chlorine, helium, sodium, etc.

-Compounds on other hand are substances that contain more than one atom from different element that are combined together chemically. The atoms in a compound are in a fixed ratio. Compounds can be divided into simpler forms using chemical means. Example of compounds include; carbon (iv) oxide, water, etc.

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3 years ago

Read 2 more answers

PLEASEEE HELPPP!! what is an example of an energy transfer in the picture?

RideAnS [48]

Answer:

Explanation:

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3 years ago

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The table shows the distance between the moon and

Lunna [17]

January 10. 360,048.

Explanation:

The Earth and the Moon are two space bodies that have each other as the closest to one another. Both of them have their own gravitational pull, with the one of the Earth being much greater, while the one of the Moon being weaker than it is expected for a body of its size. Nevertheless they influence each other with the gravitational pull, which is most noticeable on Earth.

The gravitational pull between these two space bodies is the greatest when they are the closest to each other, while it is the smallest when they are the furthest from each other. On January 10 the distance between Earth and the Moon is the smallest and it is 360,048 km, so the gravitational pull is the greatest on this date. On December 19 the distance between Earth and the Moon is the greatest and it is 406,276 km, so the gravitational pull is the smallest.

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3 years ago

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A. Determine the surface area, volume, and surface area to volume ratio for the following three blocks. Then, state which one yo

insens350 [35]

Explanation:

In a cell, the rate of diffusion is higher when the surface area to volume ratio is higher.

- given that a cube or block has 6 sides...

Volume ⇒ 1.5 cm x 1.5 cm x 1.5 cm= 3.375 $cm^{3}$

Surface area ⇒ (1.5 cm x 1.5 cm x 1.5 cm) x 6=13.5 $cm^{2}$

Surface area :Volume ⇒ $\frac{13.5}{3.75}$ = 1:4

Volume ⇒.5 cm x .5 cm x 6 cm= 1.50 $cm^{3}$

Surface area ⇒(2 (.5 cm x .5 cm)) + (4(.5 cm x 6 cm))= 0.5+12 = 12.5 $cm^{2}$

Surface area :Volume ⇒ $\frac{12.5}{1.5}$ = 25: 3

Volume ⇒3 cm x 2 cm x 2 cm= 12 $cm^{3}$

Surface area ⇒(2 (3 cm x 3 cm ))+(4(3 cm x 2 cm))=42 $cm^{2}$

Surface area :Volume ⇒ $\frac{42}{12}$ = 7:2

<em>The highest ratio is said to be the most efficient; with a higher surface area, more substances can pass across the surface of the cell at a time. </em>

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Further Explanation:

Cells require all substances to cross the cell membrane. These, like agar, which contains small pores, is semi permeable -only allowing some molecules to pass cross the membrane or surface. The cubes contain a pH indicator that reacts with the solute, vinegar. Cell membranes contain lipids which form a barrier; polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties.

Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracross the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water and water soluble molecules, to diffuse across the membrane along the concentration gradient

acellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water and water soluble molecules, to diffuse across the membrane along the concentration gradient

Thus in smaller cubes the rate of diffusion is higher as the surface area to volume ratio is higher; the vinegar diffuses all the way to the center, as indicated by the color change in the cube.

However as cells increase in size, their surface area:volume ratios decrease rapidly; larger cells, like the larger agar cubes, have a harder time moving molecules across the membrane, so the color change cannot be seen in the middle, as there was less of a permeable surface for the vinegar to diffuse across. to combat this, eukaryotic cells have specialized mechanisms to transport molecules along with membrane-bound organelles like the endoplasmic reticulum that provide a higher surface area for absorption and enable more efficient transportation.