PLEASE HELP!!!!!!!!!!!!!!!!!!!

Answer:

the second one

Explanation:

thermal has to do with temperature

The carbonic acid dissociation constant, ocean pH and the bicarbonate ion concentration are required to to calculate the ocean concentration of the carbonate ion.

The concentration of a chemical species is the amount in moles per given litre of solution.

To calculate the ocean concentration of the carbonate ion, the data needed are:

The equation for calculating the carbonate ion concentration is given below:

[tex][CO_3^{2-}] = \frac{K × [HCO_3^{-}]}{H^{+}}[/tex]

Therefore, to calculate the ocean concentration of the carbonate ion, the carbonic acid dissociation constant, ocean pH and the bicarbonate ion concentration are required.

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The required moles of nitrogen which are needed to completely convert 6.34 moles of hydrogen is 2.11 moles.

Stoichiometry of any reaction gives idea about the relative amount of reactants and products are present in any chemical reaction in terms of moles.

Given chemical reaction is:

N₂ + 3H₂ → 2NH₃

From the stoichiometry of the reaction:

3 moles of H₂ = reacts with 1 mole of N₂

6.34 moles of H₂ = reacts with 1/3×6.34=2.11 moles of N₂

Hence required moles of nitrogen are 2.11.

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Answer:

[tex]Cr_{2} O_{4}[/tex]

Explanation:

[tex]\frac{molecular weight}{molar mass}[/tex] =  [tex]\frac{168}{83.99}[/tex] =  2.00

[tex]CrO_{2}[/tex] x 2 = [tex]Cr_{2} O_{4}[/tex]

Answer:

The periodic table is arranged by atomic weight and valence electrons. These variables allowed Mendeleev to place each element in a certain row (called a period) and column (called a group). The table comprises seven rows and 18 columns

Explanation:

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Answer:

6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.

Explanation:

We are given the chemical equation:

[tex]\displaystyle 2\text{NH$_3$}_\text{(g)} + 3\text{CuO}_\text{(s)} \longrightarrow \text{N$_2$}_\text{(g)} + 3\text{Cu}_\text{(s)}+3\text{H$_2$O}_\text{(g)}[/tex]

And we want to determine the amount of products produced when 12.5 moles of NH₃ is reacted with excess CuO.

Compute using stoichiometry. From the equation, we can see the following stoichiometric ratios:

Dimensional Analysis:

[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{1\text{ mol N$_2$}}{2\text{ mol NH$_3$}} = 6.25\text{ mol N$_2$}[/tex]

[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{3\text{ mol Cu}}{2\text{ mol NH$_3$}} = 18.8\text{ mol Cu}[/tex]

[tex]\displaystyle 12.5\text{ mol NH$_3$} \cdot \frac{3\text{ mol H$_2$O}}{2\text{ mol NH$_3$}} = 18.8\text{ mol H$_2$O}[/tex]

In conclusion, 6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.

Let the volume be V

Put values

Answer:

hund's rule

Explanation:

states that single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals (electrons fill empty orbitals before they pair up).

Answer:

A. to absorb as much sunlight as possible.

Explanation:

Because they are in the understory, it's a constant competition for sunlight to perform photosynthesis, so they need wider leaves to capture what is filtered by canopy trees.

Answer:to absorb as much sunlight as possible

Explanation:

Answer: 0.83

Explanation:

Answer:

Eye: May cause eye irritation. Exposure to solid may cause pain and redness. 

Skin: May cause skin irritation. May be harmful if absorbed through the skin. 

Ingestion: May cause irritation of the digestive tract. May be harmful if swallowed. Ingestion of large amounts may cause nausea and vomiting, rigidity, or convulsions. Continued exposure can produce coma, dehydration, and internal organ 

Inhalation: May cause respiratory tract irritation. May be harmful if inhaled. Chronic: No information found.

Answer:energy ( sorry if i'm wrong lol)

Explanation:

All waves carry energy. The energy of some waves, such as the energy of earthquakes, can be directly observed. Similarly, the churning of the shore by the water waves and the pulverization of nerve cells due to loud sounds are manifestations of wave energy.

The changes occur in reaction are the bond in H₂ is broken, and new bonds are formed between hydrogen and oxygen atoms.

Hydrogen bond is a type of chemical bond which is formed between the hydrogen atom and more electronegative atom due to high dipole interaction.

Given chemical reaction is:

2H₂ + O₂ → 2H₂O

In the above reaction hydrogen nucleus not loses proton inspite of that it was broken and new bond formation takes place in water.

Despite the fact that oxygen atoms attract electrons from hydrogen atoms, oxygen atoms do not gain electrons.

In the water molecule each electron of both hydrogens is shared with an oxygen atom.

As a result, in the preceding equation, the hydrogen molecule's bond is broken, a new bond is formed, and each hydrogen atom's electron is shared with an oxygen atom.

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Answer:

c and d on edge 2022

Explanation:

Answer:

B

Explanation:

You prioritize the bromo group and then name the alkyl substituents accordingly (and also in the correct alphabetical order)

B. 1-bromo-2-ethyl-3-methylbenzene is the aromatic hydrocarbon

CH3 CH2CH3Br.

Traditionally, benzene-like substances have been called aromatic hydrocarbons due to the fact that they had unique aromas. Today, aromatic compounds include any that incorporate a benzene ring or have the residences we accomplice with this group of compounds.

Aromatic compounds, additionally known as "mono- and polycyclic aromatic hydrocarbons", are natural compounds containing one or extra fragrant earrings. The discern member is benzene. Heteroarenes are carefully related, considering the fact that as a minimum one carbon atom of CH organization is changed through one of the heteroatoms oxygen, nitrogen, or sulfur.

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Answer:

Gay-Lussac Law

Explanation:

We can eliminate two of the options :

Both of these laws do not involve variation in pressure, but only conditions in which they remain constant.

Boyle's Law

Gay-Lussac Law

Answer:

Introduction. Alongside fat and protein, carbohydrates are one of the three macronutrients in our diet with their main function being to provide energy to the body. They occur in many different forms, like sugars and dietary fibre, and in many different foods, such as whole grains, fruit and vegetables.

Explanation:

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With the increase in temperature, the state of matter of water will changed.

If the temperature of water is increased then the state of matter will change from liquid state to gaseous state because the temperature break down the bonds that is present between two water molecules.

So we can conclude that with the increase in temperature, the state of matter of water will changed.

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Refer to the attachment

Apply Boyles law

[tex]\boxed{\sf {P\propto \dfrac{1}{V}\atop \implies \dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}}}[/tex]

So

Answer:

The process is called reduction because any loss of electrons by one substance must be accompanied by a gain in electrons by something else, oxidation and reduction always occur together.

Answer:

2 electrons

Explanation:

every s sublevel can only be occupied by 2 electrons so a filled 6s sublevel would have 2 electrons

Rechargeable batteries use a reversible reaction medium to convert electrical current to a form of chemical energy which can be stored for future use.

A rechargeable battery is a type of battery that can be charged many times by passing electric current through the cells in a reversible reaction.

When electrical energy from an outside source is applied to a secondary cell (reachargeable battery), the negative to positive electron flow that occurs during discharge is reversed, and the cell's charge is restored. This process is called reversible reaction.

Thus, rechargeable batteries use a reversible reaction medium to convert electrical current to a form of chemical energy which can be stored for future use.

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Answer:

Explanation:

Answer:

413000 grams

Explanation:

from model

Answer:

302.75 Liters

Explanation:

Given:

P = 1 atm

V = ?

n = 13.5 moles

R = 0.0821 atm x L / mole x K

T = 273.15 K

PV = nRT

(1) (V) = (13.5) (0.0821) (273.15)

V = 302.75 Liters

Answer:

A. It is stable

Explanation:

Ed22

Stability is the  property that would xenon most likely to have. Therefore, the correct option is option A.

Chemically speaking, xenon is a gas with the atomic number 54 and the symbol Xe. It is a thick, colourless, and odourless noble gas that is present in minute levels in Earth's atmosphere. It may go through a few chemical reactions, such as the creation of xenon hexafluoroplatinate, which is the initial noble gas combination to be created, despite typically being unreactive.

Flash lamps, arc lamps, and general anaesthetics all employ xenon. The early laser designs utilised xenon flash lamps for pumps and a xenon monomer molecule (Xe2) for the lasing medium in the initial excimer laser design. Stability is the  property that would xenon most likely to have.

Therefore, the correct option is option A.

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Answer:

A fever is a sympton. A headache is a sign. increase pulse rate is a sign. low blood pressure is a sign. feeling of dizzinies is a symptom. stomache is a symptom.

Explanation:

I learned these in class before and they make the most sense.

Answer:

I believe that'd create neutral, or pure.

Explanation:

Because the atmosphere has a pressure difference of 2 mmHg from the lungs, air will migrate into the lungs to maintain equilibrium.

Generally, pressure is simply defined as the force exerted on an item.

In conclusion,if the above parameters where to occur, we would see air flows from a higher-pressure location to a lower-pressure area.

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