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2 years ago

A concentration gradient exists in a solution when the concentration of solutes in the solution is.

1 answer:

3 0

When the concentration of solutes in one part of a solution is more than the concentration of solutes in another part of the solution, a concentration gradient is said to exist.

Concentration gradient can be demonstrated by adding salt to a glass of water. At first, not every part of the water is salty, only the region where the salt was added. Here, a concentration gradient exists. Overtime, the Na+ and Cl- move down the concentration gradient, making the salt concentration throughout the water equal.

In nature, cells use concentration gradient to store energy. Concentration gradient also helps to facilitate movement and transport within and out of the cell through osmosis and diffusion.

To learn more about concentration gradient, check out:

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What is a substance's melting point?

TEA [102]

A melting point of a substance is a point at which the sample or substance start converting in liquid. For most substances, melting and freezing points are approximately equal. For example, the melting point and freezing point of mercury is 234.32 kelvins (−38.83 °C or −37.89 °F). Hope this helped!! :)

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3 years ago

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I need help with #3 name the compound

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4-ethyl-3-methyl 1 hexane

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3 years ago

An objects tendency to maintain its current state of motion is called

daser333 [38]

Inertia is the tendency of an object to remain at rest or remain in motion. Inertia is related to an object's mass.

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2 years ago

Give the number of lone pairs around the central atom and the molecular geometry of XeF4.A)0 lone pairs, tetrahedralB)1 lone pai

vovangra [49]

Answer: 2 lone pairs, square planar

Explanation:

Using the VSEPR ( Valence Shell Electron Pair Repulsion)Theory

To calculate the number of lone pairs electron can be done using the formula;

Number of electrons = ½ (V+N-C+A)

V mean valency of the central atom

N means number of monovalent bonding atoms

C means charge on cation

A means charges on anion

Therefore, to calculate the number of lone pair electron C=A=0;

Number of electrons = ½ (8+4) = 12/2 = 6

Number of bonding pair = 4

Number of lone pairs of electron = 6-4 = 2

The hybridrization of the compound is sp3d2 because the number of electrons around the central atom is 6.

The geometry of the compound is square planar and this is because of the repulsion between the bonding pair of electrons and lone pair of electrons which causes the lone pair of electrons to lie in a perpendicular plane in order to acquire stability.

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3 years ago

Indicate the number of significant figures in the measured number 0.0020 A. 4 B. 5 C. 2

Sergio [31]

Answer:

The correct answer option is C. 2.

Explanation:

We are given the number '0.0020' and we are to indicate the number of significant figures in the given measured number.

According to the rules of significant figures, numbers that are non-zero, zeros between any two significant numbers and the ending zeros in the decimal position are categorized as significant figures.

Since there is one non-zero number and one ending zero in the decimal position, therefore 0.0020 has 2 significant figures.

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3 years ago