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3 years ago

Earth's layers can be distinguished by density and what other property?

Chemistry

2 answers:

krok68 [10]3 years ago

4 0

The layers are different by composition also,
heavier gasses are lower.

Whitepunk [10]3 years ago

4 0

Answer:

Composition

Explanation:

Earth's layers can be distinguished by both the property of both density and composition. The earth is comprised of 3 different layers whose density and composition significantly changes with depth. The density of the crust is the lowest and the density of the core is the highest. The composition and density of different layers of the earth's interior are as follows-

(1) Core- it is comprised of hot molten materials that include the alloys of Iron (Fe) and Nickel (Ni) and other siderophile elements. The average density of this layer is about 12.5 g/cm³.

(2) Mantle- This layer is comprised of rocks that primarily contain Silicon (Si), Magnesium (Mg), Iron (Fe), Oxygen (O), Aluminum (Al), in association with some other minerals. The average density of this layer is 4.5 g/cm³.

(3) Crust- This is the outermost hard layer that is made up of rocks containing Oxygen (O), Aluminum (Al), Potassium (K), Iron (Fe), Calcium (Ca), Silicon (Si), Sodium (Na) and some amount of Magnesium (Mg). The continental crust is comprised of granitic composition whereas the oceanic crust is comprised of basaltic composition. The average density of the crust is approximately 2.5 g/cm³.

Thus, both density and composition are two distinguishable properties.

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Matter G has a fixed shape and size. It is a:

agasfer [191]

Answer:

it is a solid

Explanation:

a solid is a fixed shape and size while liquids and gasses are not

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2 years ago

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Write the electrons configuration for an atom of an element whose atomic number is 8

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The electron configuration for a atom whose element has a atomic number of 8 (Oxygen) is 2,6

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3 years ago

Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. Solutes formula hydroch

matrenka [14]

Compounds which on dissolving in water gets completely dissociates into its ions are known as strong electrolytes whereas compounds which on dissolving in water gets partially dissociates into its ions are known as weak electrolytes.

Substances which gives solution on dissolving in water and do not dissociates into ions also does not conduct electric current are known as nonelectrolyte.

Hydrochloric acid, $HCl$

On adding $HCl$ (strong acid) in water, it will completely dissociates into ions ( $H^{+}$ and $Cl^{-}$ ) and thus, it is a strong electrolyte.

Sodium hydroxide, $NaOH$

On adding $NaOH$ (strong base) in water, it will completely dissociates into ions ( $Na^{+}$ and $OH^{-}$ ) and thus, it is a strong electrolyte.

Formic acid, $HCOOH$

On adding $HCOOH$ (weak acid) in water, it will partially dissociates into ions ( $H^{+}$ and $HCOO^{-}$ ) and thus, it is a weak electrolyte.

Methyl amine, $CH_3NH_2$

On adding $CH_3NH_2$ (weak base) in water, it will partially dissociates into ions ( $CH_3NH_3^{+}$ and $OH^{-}$ ) and thus, it is a weak electrolyte.

Potassium chloride, $KCl$

On adding $KCl$ in water, it will completely dissociates into ions ( $K^{+}$ and $Cl^{-}$ ) and thus, it is a strong electrolyte.

Ethanol, $C_2H_5OH$

On adding $C_2H_5OH$ in water, it will not dissociates into ions and thus, it is a nonelectrolyte.

Sucrose, $C_{12}H_{22}O_{11}$

On adding $C_{12}H_{22}O_{11}$ in water, it will not dissociates into ions and thus, it is a nonelectrolyte.

3 0

3 years ago

Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different i

alina1380 [7]

Answer:

Number of protons, Z = 14
Number of neutrons, N = 14

Explanation:

1) About isotopes:

Isotopes are different kind of atoms of the same element. Hence, they have the atomic number (Z), which is the number of protons, the same number of electrons (talking about to neutral atoms, not ions), and different number of neutrons N).

This is, it is the number of neutrons what distinguish different isotopes of an element.

2) About the notation used to distinguish different isotopes:

A superscript and a subscript, both to the left of the chemical symbol of the element, are used to distinguish different isotopes:

A ←------------- This superscript tells the mass number of the isotope

X ←--------- This is the chemical symbol of the element

Z ←-------------- This subscript is the atomic number of isotope

In our case, the notiation for the isotope of silicon is: ²⁸₁₄ Si

So, we have:

28 is the mass number (A)
14 is the atomic number (Z)
Si is the chemical symbol.

Now, you can answer the questions of the part A:

Number of protons: Z = 14

Number of neutrons N:

mass number = number of protons + number of neutrons

A = Z + N

⇒ N = A - Z = 28 - 14 = 14

In conclusion:

Number of protons, Z = 14
Number of neutrons, N = 14

5 0

3 years ago

Complete the table to summarize the properties of the different subatomic particles. Type in your answers.

Aloiza [94]

<h2>Complete the table to summarize the properties of the different subatomic particles. </h2>

Explanation:

Atom

It is a smallest particle which cant exist independently.

According To Dalton, atom was indivisible but later on, it was proved that atom can be subdivided into sub atomic particles called electron, proton & neutron.

These subatomic particles have marked properties .

Proton

It was discovered by E.Goldstein .
It is positively charged particle
It is present in nucleus .
Its mass is equal to 1.6726219 × 10⁻²⁷ kilograms

Neutron

It was discovered by E.chadwick .
It is neutral
It is present inside the nucleus .
It's mass is equal to 1.674927471×10⁻²⁷ kg

Electron

It was discovered by J.J Thomson .
It has negative charge .
It's mass is equal to 9.10938356 × 10⁻³¹ kilograms
It is present outside the nucleus in shells .

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2 years ago

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