Which diagram shows an element?

Answer:

A

B

A

B

B

Explanation:

B - MIXTURE

A - COMPOUND

Answer:

NaF

Explanation:

Melting point of NaF is 993°C but Melting point of KF is 858°C

Answer:

I think naf

Explanation:

Answer:

See explanation and image attached

Explanation:

The IUPAC system of nomenclature enables the structure of molecules to be written seamlessly from the name of the compound. Hence it is commonly called the systematic nomenclature.

The parent chain here is propane. It is substituted at the 2- position by a methyl group and at the 3-position by 4-chlorophenyl group as we can see in the image attached to this answer.

Answer:

The wavelength decreases

Explanation:

As you go along the EM spectrum from radio waves to gamma rays, the wavelength decreases as the wave's energy and frequency increase.

Answer:

Whether the forces of attraction is strong or weak is explained below in details.

Explanation:

There are three distinct kinds of intermolecular forces in expressions of energy. They are (strongest to weakest) dipole-dipole, hydrogen bonding, and Van der Waals' strengths. Intermolecular forces are weak related to intramolecular forces – the energies which endure a molecule collectively. For instance, the covalent bond, including distributing electron sets among atoms, is much more powerful than the forces impersonate among neighboring molecules.

Answer:

1.)[tex]Al_{2} O_{3}[/tex]

2.) [tex]Li_{3} N\\[/tex]

3.) 2HCl

4.) MgO

5.) Mg and [tex]O_{2}[/tex]

6.) [tex]H_{2}[/tex] and [tex]O_{2}[/tex]

7.)Na and [tex]Br_{2}[/tex]

8.) 3 aluminums and 3 chlorides

Explanation:

Answer:

increase

Explanation:

To solve this problem, you simply have to apply the Ideal Gas Law. Using this equation, we know that the pressure is directly proportional to the temperature. Thus, as something is heated (i.e. its temperature is increasing), its pressure would increase as well.

Answer:

red beryl

Explanation:

Red Beryls = Density range is 2.63g/cm3 to 2.92 g/cm3

Rubies = Density Range is 3.9 g/cm3 to 4.1 g/cm3

Mass of stone = 4.35 g

Volume of solid = change in water level = 1.5 mL = 1 cm3

Relationship between mass, volume and density is given by;

Density = Mass / Volume

Density = 4.35 / 1.5 = 2.9 g/cm3

The density of the stone falls in the red beryls range hence it is a red beryl.

The percent composition by mass for sodium (Na) in Sodium phosphate (Na₃PO₄) : 42.07%

Given

Compound of Sodium phosphate (Na₃PO₄)

Required

The percent composition by mass for sodium (Na)

Solution

The Comparative Law (Proust ) : compounds are formed from elements with the same Mass Comparison

MW Na₃PO₄ = 163,94 g/mol

Ar Na=22,989769g/mol

[tex]\tt \%mass~Na=\dfrac{3.Ar~Na}{MW~Na_3PO_4}\times 100\%\\\\\%mass~Na=\dfrac{3\times 22.99}{163.94}\times 100\%\\\\\%mass~Na=42.07\%~Na[/tex]

Explanation:

Reaction of zinc metal in copper sulfate solution.

[tex]\begin{array}{ll}\text { Oxidation : } & \mathrm{Zn}(s) \rightarrow \mathrm{Zn}^{2+}(a q)+2 e^{-}\\\text {Reduction : } & \mathrm{Cu}^{2+}(a q)+2 e^{-} \rightarrow \mathrm{Cu}(s) \\\hline \text { Full Reaction : } & \mathrm{Zn}(s)+\mathrm{Cu}^{2+}(a q) \rightarrow \mathrm{Zn}^{2+}(a q)+\mathrm{Cu}(s)\end{array}[/tex]

Zinc is listed above copper on the activity series, this means that zinc is more easily oxidized than copper. That is why copper(II) ions can act as an oxidizing agent when put into contact with zinc metal. Ions of any metal that is below zinc, such as lead or silver, would oxidize the zinc in a similar reaction.

Answer:

Because as we move down the group size/ radius of atom increases due to increase in shells and screening effect. The hold of nucleus on valence electrons decreases and effective nuclear charge decreases so it is easy to remove electron from greater sized atoms as compared to smaller sized aroms.

Energy required to remove electron is ionization energy so greater sized atoms have low ionization energy.

Explanation:

Answer:

3 valence electrons

Explanation:

Because aluminum has three, that means three fluorines can bond. The make the formula AlF3, also known as aluminum trifluoride. Each of the fluorine atoms gets an electron to fill their shell, and the aluminum loses three, giving it a filled shell too (remember, aluminum has three extra electrons).

Answer:

There are different types of soil in the earth. Those different types of soil helps the earth stay healthy in many ways!! Just like the different layers in the earth. There are so many different layers in the earth so that the plants get the different nutrition they need. Not only that but it cleans the water that soaks in the ground.

There are 6 different types of soil, they are; sandy soil, clay soil, silt soil, peat soil, chalk soil, and loam soil.

Explanation:

Sandy soil

Sandy Soil is light, warm, dry and tend to be acidic and low in nutrients. Sandy soils are often known as light soils due to their high proportion of sand and little clay (clay weighs more than sand). These soils have quick water drainage and are easy to work with. They are quicker to warm up in spring than clay soils but tend to dry out in summer and suffer from low nutrients that are washed away by rain. The addition of organic matter can help give plants an additional boost of nutrients by improving the nutrient and water holding capacity of the soil.

Clay Soil

Clay Soil is a heavy soil type that benefits from high nutrients. Clay soils remain wet and cold in winter and dry out in summer. These soils are made of over 25 percent clay, and because of the spaces found between clay particles, clay soils hold a high amount of water. Because these soils drain slowly and take longer to warm up in summer, combined with drying out and cracking in summer, they can often test gardeners.

Silt Soil

Silt Soil is a light and moisture retentive soil type with a high fertility rating. As silt soils compromise of medium sized particles they are well drained and hold moisture well. As the particles are fine, they can be easily compacted and are prone to washing away with rain. By adding organic matter, the silt particles can be bound into more stable clumps.

Peat Soil

Peat soil is high in organic matter and retains a large amount of moisture. This type of soil is very rarely found in a garden and often imported into a garden to provide an optimum soil base for planting.

Chalk Soil

Chalk soil can be either light or heavy but always highly alkaline due to the calcium carbonate or lime within its structure. As these soils are alkaline they will not support the growth of ericaceous plants that require acidic soils to grow. If a chalky soil shows signs of visible white lumps then they can’t be acidified and gardeners should be resigned to only choose plants that prefer an alkaline soil.

Loam Soil

Loam soil is a mixture of sand, silt and clay that are combined to avoid the negative effects of each type. These soils are fertile, easy to work with and provide good drainage. Depending on their predominant composition they can be either sandy or clay loam. As the soils are a perfect balance of soil particles, they are considered to be a gardeners best friend, but still benefit from topping up with additional organic matter.

Those are the different types of soils with all of their many uses. I hope this helps!!!!! Have a wonderful day!!!

Answer:

with what?

Explanation:

Answer:

saac Newton was a physicist and mathematician who developed the principles of modern physics, including the laws of motion and is credited as one of the great minds of the 17th-century Scientific Revolution.

Education: The King's School, University of Ca...

Birth Date: January 4, 1643

Death Date: March 31, 1727

Explanation:

Isaac Newton was a physicist and mathematician who developed the principles of modern physics, including the laws of motion and is credited as one of the great minds of the 17th-century Scientific Revolution.

hope it helps have a great day

Answer: 3915 K ​(3642 °C, ​6588 °F)

Answer:

8,721°F

OR

4,827°C.

Explanation:

Good Luck!

Answer:

Probably B?

Explanation:

I don't have one...

Hope it helps I guess..

Answer: i think is B

Explanation: HATE ME IF IM WRONG

Answer:

D

Commutator is the answer

Explanation:

The commutator systematically converts the current direction between the rotor and the outer circuit. As the shaft revolves, the commutator converts the course of current in a winding. For a separate armature winding, when a cylinder has reached one-half perfect turn, the winding is now attached so that current passes through it in the reverse of the original direction.

Answer:

D. Commutator

Explanation:

I just took the quiz. credit to the person above me.

Answer:

El gas se calentó a 35°C

Explanation:

Para resolver este problema es necesario aplicar la Ley de Gay Lussac donde en una situación en la que un gas no modifica su volumen, su temperatura será directamente proporcional a la presión.

Podemos pensar que se describe desde la Ley de Gases Ideales donde:

P . V = n . R . T

para la situacion 1

y P . V = n . R . T para la situacion 2

Como V, n y R son constantes:

P₁ / T₁ = P₂ / T₂

250000 Pa / 25°C = 350000 Pa / T₂

T₂ = 350000 Pa . 25°C / 250000 Pa → 35°C

answer is attached in the image below

Answerme espanol amigo me

Explanation:

Answer:

Sea Stack

Explanation:   :)

Answer:

A

Explanation:

Answer:

endoplasmic reticulum

Explanation:

Endoplasmic reticulum will complete the chart. The Endoplasmic reticulum is one type of organelle that is present in eukaryotic cells. They form a network that is interconnected with membrane-enclosed sacs or structures that are tube shaped and are called cisternae.

Answer:

41.3 °C

Explanation:

From the question given above, the following data were obtained:

Mass (M) of water = 27.56 g

Heat (Q) loss = 2443 J

Final temperature (T2) = 62.5 °C

Initial temperature (T1) =?

NOTE: The specific heat capacity (C) of water is 4.18 J/g°C

Thus, we can obtain the initial temperature of the water by using the following formula:

Q = MC(T2 – T1)

2443 = 27.56 × 4.18 (62.5 – T1)

2443 = 115.2008 (62.5 – T1)

Divide both side by 115.2008

2443 / 115.2008 = (62.5 – T1)

21.20645 = 62.5 – T1

Collect like terms

21.20645 – 62.5 = – T1

– 41.3 = – T1

Divide both side by – 1

– 41.3 /– 1= – T1 / –1

41.3 = T1

T1 = 41.3 °C

Thus, the initial temperature of the water was 41.3 °C

Answer:

BLOOD - the definition of blood is the fluid carries oxygen

Explanation:

sana po makatulong♡♡

Answer:

No, gases move freely all over the place, liquids move more freely but in a more contained area, and solids the molecules are rigid, at the most the movement is small vibration as the molecules put pressure on one another to hold their form and stay in place.