Is this Ionic, Covalent, or Metallic? *

Answer: D

Explanation:

Answer:

C. Friction

Explanation:

Because friction needs contact to occur, the other forces do not require contact like friction does.

Answer:

3.97 x 10²³atoms

Explanation:

Given parameters:

Mass of ammonia = 11.22g

Unknown:

Chemical amount of ammonia present  = ?

Solution:

The chemical amount present in a substance is the number of atoms it contains.

To solve this problem, from the given mass find the number of moles first.

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of NH₃   = 14 + 3(1) = 17g/mol

  Number of moles  = [tex]\frac{11.22}{17}[/tex]   = 0.66mole

   1 mole of any substance contains  6.02 x 10²³ atoms

  0.66 mole of ammonia will contain 0.66 x 6.02 x 10²³ atoms

                                                            = 3.97 x 10²³atoms

Answer:

D- a weak base

Explanation:

The ph scale goes from 1-10 a solution over 7ph is classified as basic. A solution thats 8.4 is only 1.4 over 7pH, making it a weak basic solution. An example of a strong base would be a solution with a pH of 9.2 (for example).

Answer:

D.) The solution is a weak base

Explanation:

I got it correct on founders education

Answer:

Covalent

General Formulas and Concepts:

Chemistry - Compounds

Explanation:

Step 1: Define

NCl₃ - Nitrogen Trichloride

Step 2: Identify

Nitrogen is a nonmetal

Chlorine is a Halogen Gas

Step 3: Confirm

Nitrogen and the 3 Chlorines will have to share electrons and form a Covalent bond.

Answer:

The bond is ionic.

Explanation:

If a nonmetal and a metal bond, it's known as a characteristic of an ionic bond.

The answer above is false, Google "Is nitrogen trichloride an ionic compound" in order to find out why.

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Answer:Plate Tectonics : Different Plate Boundaries Create Different Landforms and ... Plate Boundary: CONVERGENT ... As the MORE DENSE oceanic plate (OP) subducts under ... Illustration of what is happening ... Two continental plates (CP) move away from each other ... Sea Floor spreading occurs at these mid-ocean ridges.

Explanation:

The landforms created in the subducting plate boundary are mid ocean ridges, fold mountains and islands. Volcanoes and earth quakes are common in these regions.

Plate boundaries are regions of intersections between two tectonic plates. There are three different  type of plate boundaries, namely convergent boundaries, divergent boundaries and transform boundaries.

In convergent plate boundaries, two tectonic plates moves close to each other and converge. These plate boundaries gives rise to different types of land forms such as fold mountains, islands etc.

Earthquakes and volcanoes are common in convergent plate boundaries. These type of  plate movement is caused by the convection currents in the mantle.

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Answer:

The number of photoelectrons are increased

Explanation:

According to Albert Einstein, when light falls on a clean metal surface, electrons are ejected from the clean metal surface. This is known as photo electric effect.

The kinetic energy of the emitted photoelectron depends on the energy of the incident photon and the work function of the metal. If the energy of the incident photon is less than the work function of the metal, photoelectric effect does not occur.

Below a given threshold frequency or wavelength called the threshold frequency or threshold wavelength photoelectric effect does not occur.

However, doubling the photon flux of light doubles the intensity of the light. This only leads to increase in the number of photons and have nothing to do with the energy of the emitted photoelectrons.

Ionic bonds are formed between ionic compounds, Ionic compounds are formed when metals join with nonmetals.

Ionic bonds are electrostatic bonds that are formed between metals and nonmetals. It is an electrostatic attraction between oppositely charged ions in a chemical compound.

These bonds are formed when two or more atoms lose or gain electrons. An example of ionic bonds can be seen in the NaCl compound.

Na⁺ + Cl⁻ = Na⁺Cl⁻

NaCl is formed by the joining of oppositely charged elements. They constitute salt. Salt is made up of ionic compounds, so it easily dissociates into sodium and chloride when mixed in water.

Thus, ionic compounds are created when metals combine with nonmetals, and these combinations result in the formation of ionic bonds.

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Answer:

Explanation:m

At 1 atm and 300 K, this gives n/V = 0.0406 mol/l. For air, which has a molar mass of 29.0 g/mol, this gives a density of 1.18 g/l. Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l. Thus, a one-liter balloon of helium can lift a mass of (1.18-0.164) = 1.02 g. In science, the standard unit of mass is the kilogram (kg). A bowling ball has a mass of about 5 kilograms. Bowling ball weights range from 6 lbs. To 16 lbs. in most cases males will use weights ranging between 12 lbs. and 16 lbs. You might calculate volume using the sphere's radius, circumference or diameter. You can also submerge the sphere in water to find its volume by displacement. Once you know the volume, you can multiply by the density to find the mass.

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Answer:

Temperature is an abiotic component of an ecosystem

Explanation:

Answer:

Open cluster

Explanation:

Why should I explain?

Answer: D open cluster

Explanation:

Answer:

c

Explanation:

Diagram C represents active transport which is a type of facilitated diffusion.

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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Answer: Melting or boiling

Explanation:

Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.

Answer:

beta minus emission

Explanation:

Beta radiations:

Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.

The mass of beta particle is smaller than the alpha particles.

They can travel in air in few meter distance.

These radiations can penetrate into the human skin.

The sheet of aluminum is used to block the beta radiation

²³⁹₉₃Np→ ²³⁹₉₄Pu + ⁰₋₁e

The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.

Answer: the atomic number is 11

Explanation: using a electron configuration chart you can see that 3s1 stops on Na which is 11 on the table

Answer:

True

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Answer:

true

Explanation:

Weight is calculated accounting for gravity, which is why a person weighs less on the moon than on Earth.

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Answer:

true

Explanation:

because if you really take a moment to think about it atoms are made of molecules.

Answer:

something with one particle/atom

Explanation:

Answer:

Osmosis is the process that describes water moving through a membrane.

I am not sure about the second question.

Explanation:

Answer:

a. atoms are indivisible. ... atoms can not be destroyed in chemical reactions.

Explanation:

Hope this helped :D

Answer:

True

Three-Dimensional Lattice

The unique arrangement of atoms or molecules within a crystalline solid is referred to as the crystal structure of that material. ... The crystal lattice represents the three-dimensional structure of the crystal's atomic/molecular components.

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Answer:

is there any answer choices????

Answer:

The answer is Refraction

Explanation:

The air around the equator has a high temperature, so it has a _lower_____ air pressure

Answer:

im pretty sure it is D

Explanation:

this is an old term for a microscopic organisms that included bacteria, protozoans, and very small animals

Answer:

Explanation:

The mass of the vehicle can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{1800}{1.5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

I believe that its B

Explanation:

google lol

Answer:

I’ll put the answer the comments if you can give the actual question

Explanation:

After mitosis, it is expected that the daughter cells of a fruit fly with 8 chromosomes should have 8 chromosomes.

MITOSIS:

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Answer:

salt, sugar, and so on.

Explanation:

A pure substance is a material that has a constant composition, and has the same properties throughout the sample. pure substances in chemical equations form predictable products. In chemistry, a pure substance has only one type of atom , molecule, or compound.