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34kurt
3 years ago
8

The electrons in an atoms outermost orbitals, the electrons, are represented in a(n) , which consists of the elements symbol, re

presenting the atomic nucleus and inner-level electrons, and the appropriate number of dots.
Chemistry
1 answer:
Elis [28]3 years ago
8 0

Answer:

valence electrons

electron dot structures

Explanation:

Valence electrons -

It refers to the number of electrons that are present on the very last shell of any atom , is referred to as valence electrons .

Valence electrons are responsible to show any chemical properties of the atom .

Hence , the answer of the first part is - valence electrons .

Electron dot structures -

It is the structural representation , where the symbol of the element is placed at the center and the electrons are arranged surrounding it .

Hence , the answer of the second part is - electron dot structures .

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Determine which of the following contains the greatest mass of aluminium: 122 g of AlPO4, 266 g of A12C16, or 225 g of
pav-90 [236]

Answer : The Al_2S_3 contains the greatest mass of aluminum.

Explanation :

<u>For AlPO_4 :</u>

Molar mass of AlPO_4 = 122 g/mole

Molar mass of aluminium = 27 g/mole

As, 122 g of AlPO_4 contains 27 g of Al

So, 122 g of AlPO_4 contains \frac{122}{122}\times 27=27g of Al

The mass of 'Al' in AlPO_4 is, 27 grams.

<u>For Al_2Cl_6 :</u>

Molar mass of Al_2Cl_6 = 266.7 g/mole

Molar mass of aluminium = 27 g/mole

As, 266.7 g of Al_2Cl_6 contains 2\times 27g of Al

So, 266 g of Al_2Cl_6 contains \frac{266}{266.7}\times 2\times 27=54g of Al

The mass of 'Al' in Al_2Cl_6 is, 54 grams.

<u>For Al_2S_3 :</u>

Molar mass of Al_2S_3 = 150 g/mole

Molar mass of aluminium = 27 g/mole

As, 150 g of Al_2S_3 contains 2\times 27g of Al

So, 225 g of Al_2S_3 contains \frac{225}{150}\times 2\times 27=81g of Al

The mass of 'Al' in Al_2S_3 is, 81 grams.

Hence, from this we conclude that Al_2S_3 contains the greatest mass of aluminum.

5 0
3 years ago
Ava threw a hamster at her sister the other day she used 12N of force to accelerate the hamster at 8m/s2.what was the mass of th
xenn [34]

<u>We are given:</u>

The force applied on the poor hamster (F) = 12 N

Acceleration of the poor Hamster (a) = 8 m/s²

<u>Solving for the mass of the Poor Hamster:</u>

From newton's second equation of motion, we know that:

F = ma

<em>replacing the given values</em>

12 = 8 * m

m = 12/8 kg

m = 3/2 kg

The poor Hamster weighs 3/2 kg

8 0
3 years ago
Guess how many water molecules self-ionize in one liter of water! a) 7 moles b) 1 mole c) 10,000,000 moles d) 0.0000001 moles​
Rudiy27

Answer:

D)

Explanation:

This seems like a weird question

Water is held together by covalent bonds. The amount of energy required to break these bonds so that water would split into it's respective ions is pretty high. The chances that any one of the molecules floating in 1L of water get enough energy to spontaneously burst into it's ions is slim to none.

So, D) seems like the most likely answer

6 0
3 years ago
How are the three phrases of agriculture (shifting, labor-intensive, mechanized monoculture) different in terms of description,
natka813 [3]

Answer:

Explanation:

Shifting, labor intensive and monoculture are different in terms of description,restrictions and problem.

Shifting is an agriculture method in which an area if land is cultivated for a while and abandoned for the soil to regain and preserve it's fertility. It is done to restore soul fertility.

It has restrictions because it is done in places where there is large areas of land, if there is not large area of land, it will be done.

It can lead to defforestation because trees are cut fine for land cultivation and after a while the land is abandoned and trees are cut down some where else too.

Labor intensive refers to agricultural industry requiring or needing large amount of labor to produce agricultural products. Labor intensive is restricted to areas where there is low or no people who can engage in agricultural services.

Labor intensive require high skilled people which might not be available.

Monoculture is a farming system where by a single crop is cultivated in an area of land.

The problem of monoculture is that it displaces species and nutrients occuring naturally in an ecosystem.

Monoculture is restricted in areas where diversity of crops are needed.

4 0
4 years ago
In one sentence, describe the general chemical structure of carbohydrates. In a second sentence, list the major biochemical func
Brums [2.3K]

Answer:

A carbohydrate is a compound composed of molecules of carbon (C), hydrogen (H), and oxygen (O) such that its general chemical formula is CH_2OH.

Biochemical functions of carbohydrates: Carbohydrates provide Stored Energy, Carbohydrates help to preserve Muscle and promote digestive health and Carbohydrates build macromolecules

Explanation:

A carbohydrate is a compound composed of molecules of carbon (C), hydrogen (H), and oxygen (O) such that its general chemical formula is CH_2OH.

Biochemical functions of carbohydrates:

1. Carbohydrates provide Stored Energy.

2. Carbohydrates help to preserve Muscle and promote digestive health.

3. Carbohydrates build macromolecules

6 0
3 years ago
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