Incomplete Lewis structures for the nitrous acid molecule, HNO2, and the nitrite ion, NO2-, are shown here. (a) Complete each Lewis structure by adding electron pairs as needed. (b) Is the formal charge on N the same or different in these two species? (c) Would either HNO2 or NO2- be expected to exhibit resonance?

Answer:

These cycles are called biogeochemical cycles because they include a variety of biological, geological, and chemical processes. Many elements cycle through ecosystems, organisms, air, water, and soil. ... The biogeochemical cycles transport and store these important elements so that they can be used by living organisms.

Answer:

Covalent bonds.

Explanation:

Diamond is organized in a giant lattice structure with strong covalent bonds between carbon atoms. Each carbon atom forms 4 bonds. Explanation: Each carbon atom has four electrons in its outer shell, all of which form covalent bonds that are strong and hard to break.

Answer:

addition

Explanation:

because you add the two chlorides by breaking the carbon carbon double bond

Answer:

Carbon dioxide gas

Explanation:

When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.

Answer:

Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:

Answer:

Explanation:

Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:

Answer?

Y r u singing?!?

Answer:OKEI

Explanation:im sorry for hatin but hatins what i do.i really need ma points so i can be respected more than u

Answer:

a)CH4 + O2 = CO2 + H2O

b)4CH4+5O=2CO+8H2O+2C

Answer:

To remove impurities

Explanation:

Impurities may react with other chemicals if you are still continuing with the experiment.

the answer is electrons

Answer:

a

Explanation:

Answer:

A

Explanation:

Answer:

Mass = 9.58 g

Explanation:

Given data:

Mass of Zn = 2g

Theoretical yield of ZnI₂ = ?

Solution:

Chemical equation:

Zn + I₂       →     ZnI₂

Number of moles of Zn:

Number of moles = mass/molar mass

Number of moles = 2g / 65.38 g/mol

Number of moles = 0.03 mol

Now we will compare the moles of Zn and ZnI₂.

                   Zn           :          ZnI₂

                    1             :           1

                  0.03        :         0.03

Mass of ZnI₂:

Mass = number of moles × molar mass

Mass = 0.03 mol × 319.22 g/mol

Mass = 9.58 g

Answer:

The answer is, Strontium

Answer:

Name                         Molybdenum

Atomic Mass                95.94 atomic mass units

Number of Protons 42

Number of Neutrons 54

Number of Electrons 42

Explanation:

Answer:

Explanation:

It is the horizon that contains the least humus.

Answer:

a delta

Explanation:

he place where a river enters a lake, larger river, or the ocean is called its mouth. River mouths are places of much activity. As a river flows, it picks up sediment from the river bed, eroding banks, and debris on the water. ... When large amounts of alluvium are deposited at the mouth of a river, a delta is formed.

Answer:

a. Are made of more than one cell.

Explanation:

I majored in Chemistry

Answer:

a. Are made of more than one cell.

Explanation:

Answer:

Na3Po3 is soluble in water

Sodium phosphite, often referred to as [tex]Na_3PO_3[/tex], is generally considered to be water soluble.

Because the sodium cation (Na+) has a significant affinity for water molecules due to their positive charge, sodium compounds generally have a tendency to be soluble in water. The three sodium ions increase the solubility of [tex]Na_3PO_3[/tex] and make it even more soluble.

The solubility of [tex]Na_3PO_3[/tex]  is similarly affected by the phosphate ion [tex](PO^3^-)[/tex]. Phosphates are normally soluble in water unless they are coupled with cations that generate intractable compounds, like some heavy metal ions. The strong ion-dipole interactions between sodium ions and water molecules can be used to explain why [tex]Na_3PO_3[/tex] is soluble in water.

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Answer:

jajaja como le ago pa mandarte mensaje

Answer:

Yah, it's true.

because protons are represented as helium (²4He) which are positive.

electrons are represented as 0-1e which is negative

Answer:

It is way too long I can't help with it Honestly

An element in the same row with roughly half of the atomic mass always has a greater atomic radius.

Atomic radius:  It is the distance between the nucleus and the outermost shell.

Atomic mass: It is the mass or the number of nucleons or protons and neutrons inside an atom.

In a row, the number of protons increase but the number of shells remains constant.

Hence, the positive protons in the nucleus attract electrons with more electrostatic force.

Therefore,  an element in the same row with roughly half of the atomic mass always has a greater atomic radius.

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Answer:

It acts as a filter to prevent as much germs, or chemicals/substances, as possible from entering your immune system through your breathing. This is whether you're in a lab or in a grocery store with a pandemic going around. Not only does it protect you but it also protects those around you by filtering any germs you may already have in your system and preventing them from passing on to another person. That is why you should always wear your mask over your mouth and your nose.

Explanation:

Hope this helps. Have a great day. May it be filled with joy and happiness. Please, stay safe and wash your hands.

Electron configurations correspond to an excited state is 1s₂, 2s₂, 3p₁.The electrical configuration 1s₂, 2s₂, 3s₁ demonstrates that the atom is in the excited state.

The distribution of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.

An electron is in an excited state when it momentarily possesses an energy level higher than its ground state. If an electron receives more energy, such as when it absorbs a photon, or packet, of light, or collides with an adjacent atom or particle, it can become excited.

The primary distinction between a system's ground state and excited state is that a system's ground state is any condition in which its electrons are at their lowest potential energy levels, whereas an excited state is any state in which they are at an energy greater than the system's ground state.

Thus option A is correct.

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The electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex],  [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and  [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]

corresponds to excited states whereas [tex]1s^2\ 2s^2\ 3p^6[/tex] corresponds to ground state. The correct answer is option 2.

The electron configuration of an atom describes how its electrons are distributed among the various energy levels and orbitals.

Therefore, the electron configurations  [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex],  [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and  [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]correspond to excited states, while the electron configuration  [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of argon. Option 2 is the correct answer.

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Answer:

work and power increases or decreases with the mass

Explanation:

Answer:

first; why is it a question if teacher never teached you it LOL anyways..

Explanation:

i would say its the second one

"The smae quality of each element is present on both sides of the equation."

Explanation:

as alcohol evaporates at much faster rate compared with water due to its lower boiling temperature (82 compared to 100 degree Celsius), it is able to carry away more heat from the skin. this means for a given amount of time much more alcohol evaporates than water.

hope it helps you

Answer:

B

Explanation: Since you need this quick, its because it needs to respond to the environment. I dont remember the exact term  

Explanation:

1,a: I) group 2 = strontium

ii) chlorine

iii) nitrogen

B) i) strontium outer shell=2

ii)nitrogen:outer shell=5

iii) chlorine=7

C)metal

strontium

nickel

molybdenum

cesium

tin

non metal:..

chlorine

nitrogen

neon

Volume of H₂O added = 175 ml

Given

100 gm of a 55% (M/M)  and 20% (M/M) nitric acid solution

Required

waters added

Solution

starting solution

mass H₂O = 45%=45 g

%mass of H₂O in new solution = 100%-20%=80%

Can be formulated for %mass H₂O :

[tex]\tt \dfrac{45+x}{100+x}=80\%\\\\45+x=0.8(100+x)\\\\45+x=80+0.8x\\\\35=0.2x\rightarrow x=175~g[/tex]

For water mass=volume(density = 1 g/ml)

So volume added = 175 ml

Answer:

Fatty acids

Explanation:

Acetyl coA is a compound vital for the process of cellular respiration in the mitochondria. It is the starting material of the kreb's cycle or TCA cycle, which takes place in the mitochondria. During the metabolism of glucose (glycolysis), a molecule called PYRUVATE is first synthesized before becoming acetyl coA in the mitochondrion.

However, the metabolism of FATTY ACIDS (monomers of lipids) directly gives rise to acetyl coA without first becoming pyruvate. The fatty acids molecule undergo Beta- oxidation to produce acetyl coA, which enters the TCA cycle to continue cellular respiration.

The new  pressure will be doubled

Given

A sample of ozone (O₃) at x K and 12.5 Pa. (T₁= x K, P₁=12.5 Pa)

the temperature is doubled to 2x K (T₂=2x)

Required

the new  pressure

Solution

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

Input the value :

[tex]\tt \dfrac{12.5}{x}=\dfrac{P_2}{2x}\\\\P_2=\dfrac{12.5\times 2x}{x}[/tex]