Which of the following is a Halogen??

Answer:

wavelength

n

n

n

n

n

n

n

in

n

Answer: wavelength:)

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{4.23 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 70.265780...[/tex]

We have the final answer as

Hope this helps you

Answer:

Prairie

Explanation:

because it grows in the same type of climate, its amount of humus.  sorry if its wrong I am not good with chem but i hope its right :)

Answer:

8.5 moles of Al₂O₃ will formed

Explanation:

Given data:

Number of moles of Al = 17 mol

Number of moles of Al₂O₃ formed = ?

Solution:

Chemical equation:

4Al  +  3O₂     →     2Al₂O₃

Now we will compare the moles of Al₂O₃  with Al.

                  Al            :            Al₂O₃      

                   4            :              2

                   17           :            2/4×17 = 8.5 mol

8.5 moles of Al₂O₃ will formed.    

Answer:

yes beacause our earth was rotating on its axix but they dont feel anybody because of a gravity that sorounded on earth

Answer:

The purpose of mitosis is cell regeneration, growth, and asexual reproduction,while the purpose of meiosis is the production of gametes for sexual reproduction. Mitosis is a single nuclear division that results in two nuclei that are usually partitioned into two new daughter cells.

Explanation:

Mitosis produces two cells from one parent using one division event. But meiosis produces four new child cells with two divisions, each of which has half the genetic material of its parent. Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces sex cells.

Answer:

Explanation:Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room ...

Answer: epithelium

Explanation: epithelial tissues are widespread throughout the body forming the covering of all body surfaces, body cavities, hollow organs and are also major tissues in glands performing various functions from secretion to protection, absorption, excretion, diffusion, sensory reception etc. This differentiation allows the cells of the epithelium to perform its function.

By definition, epithelial cells are membranous tissue composed of one or more layers of cells forming the covering of most internal- (lining of vessels and small cavities) and external surfaces (skin) of the body and its organs.

Answer: 4s orbital contains the electron that calcium loses to form an ion

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains.  The electrons are filled according to Afbau's rule in order of increasing energies.

Calcium with atomic number 20 has 20 electrons and has 2 valence electrons which it can lose to for stable [tex]Ca^{2+}[/tex] ion. The valence elctrons are present in valence shell i.e. 4s.

[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]

[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^64s^0[/tex]

Answer:

b

Explanation:

Answer:

liquid

Explanation:

Answer:

sun and ocean. I had this last week

Answer:

i dont think anybody is going to be able to do all of these lol

Explanation:

Explanation:

Pressure of a gas is the combined force with which the molecules bombard a unit area of the wall of the container.

    1 atm  = 760mmHg

               = 760torr

               = 101325Pa

               = 101325Nm⁻²

 1mmHg  = 1torr

        1Pa = 1Nm⁻²

101.325 kPa  and 101,325 Pa are the same

           1000Pa = 1kPa

101,325 Pa  and 1 atm

1atm and 101.325 kPa

Answer:

7.5 moles of CaBr2 are produced

Explanation:

Based on the equation:

2AlBr3 + 3CaO → Al2O3 + 3CaBr2

2 moles of AlBr3 produce 3 moles of CaBr2 if CaO is in excess.

Using this ratio: 2 moles AlBr3 / 3 moles CaBr2. 5 moles of AlBr3 produce:

5 moles AlBr3 * (3 moles CaBr2 / 2 moles AlBr3) =

Answer:

No

Explanation:

Tin is present in the earth's crust. Tin in the earth crust is never obtain or found in a free form or state. In the earth's crust, it is mainly found in the ore cassiterite. It is about the 50th most abundant element that is found in the earth's crust. This element is present in the igneous rocks.

Thus in the context, according to Maame Akosua 's conclusion from the pie chart, she is wrong that there is no tin present in the earth's crust.

Answer:

It creates a rainbow

Explanation:

Cause of the reflectiveness of the water it could possibly form another light but more colorful. you can see how it works when its becomes summer, get a water hose and just let it flow. you'll see a miniature rainbow.

Answer:

False

Explanation:

The mole ratio compares the coefficient of compounds reacting and giving products in a chemical reaction.

They are used for converting and showing relationship between reactants and products in a chemical reaction.

 For example;

       2A  →  B + C

the mole ratio is read as;

    2 mole of A produces 1 mole of B and 1 mole of C

Answer:

It would move towards the magnet or towards the opposite direction of the object.

Answer:

Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other.

Explanation:

Answer:

Brass

Explanation:

Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties.

Answer:

ammonia is a base

hope it helps

Answer:

D. Ammonia

hope it helps

Answer:

b

Explanation:

The type of wave shown is a longitudinal wave.

The correct option is B).

Longitudinal waves are those waves in which the vibrations of the waves move parallel to the direction of the wave.

The displacement of the medium is in the opposite direction of the wave propagation.

The three types of longitudinal waves are:

Thus, the wave shown is B) Longitudinal Wave.

Learn more about Longitudinal Wave, here:

https://brainly.com/question/8497711

Answer:

c

Explanation:

that is what u think is going to happen it IS AN HYPOTHESIS it is an (theory)

Answer:The number of Protons

Explanation:

Answer:

NO

Explanation:

Barium cannot ionically bond with Kalium. Kalium is the Latin name for potassium.

Both Barium and potassium are metals. Metals and Metals do not combine to form ionic compounds. Only metals and non-metals form this bond type.

Answer:

You have been asked to draw a Bohr model of the element carbon. How would you arrange the dots that represent electrons? They would be embedded in a solid core. They would be in rings around the nucleus

Answer:

On Earth, gamma waves are generated by nuclear explosions, lightning, and the less dramatic activity of radioactive decay.

Cation is the postively charged unit which is formed by the transfer of one or more electrons. It is attracted towards cathode thus it is called the CATION.

Ionic bond is the type of bond which is formed between the positive and negative ions. It is mostly formed between the Metals (i.e. group 1 and 2) and Non metals (i.e. mostly group 7). The positive charge on metal is due to the loosing of electron and negative charge on non metal is due to accepting the electron.

A molecular ion is a covalently bonded set of two or more atoms, that can be considered to behave as a single unit, it also has a charge on it.

Conductivity is more in liquid than in solid because the conductivity is flow of electron and the movement is less in solid than liquids thus the solid has less conductivity. The liquid has more movement of molecules due to which there is more conductivity.

Formula unit is a emperical formula used to express the ions in ionic compounds. It is the least whole number ratio of the ions present in the ionic compound.

Crystal lattice is the arrangement of atoms, molecules, or ions of a crystal in the form of a three dimensional space lattice.

Anion is the negative charged because It receives one electron from the cations thus becomes negatively charged entity. It is attracted towards the positive anode thus it is called anion.

Ionic bond do not form molecules, They form the ions.

One type of bonding i.e. ionic bonding is formed by the attraction between the positive and negative ions.

It is the amount of energy required to change the state of matter.