How would you express. 002 molecules of co2 per hundred molecules of air as a concentration?.

Answer:

A person sings into a microphone.

Sound is converted to an electrical signal

The electric signal creates a magnetic code.

A magnetic code is transferred to a medium such as a tape or ...

Answer:

carbon nuclei...........

Answer: Dinitrogen trioxide

Explanation:

During this procedure, the blue (CuSO 4) solution turns into a colorless ZnSO 4 solutions. balanced response. Copper sulfate is produced when Zn (s) and CuSO 4 (aq) combine. Sulfated zinc.

The number of variables on either side of a formula is equal in a balanced action. A chemical reaction's atoms, ions, all molecules are represented by a number called the stoichiometric ratio, that balances exact amounts of each element on the product and reactant sides of equation.

One such equation describes an element's total charge and number of atoms in both the products and reactants of a reaction. In other words, the mass and charge of both sides of a reaction are equal.

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Answer:

the answer is copper :)

Explanation:

On Substituting the values into the formula, we get the percent ionization of the acid is approximately 0.3155%.

To calculate the percent ionization, we need to know the concentration of the ionized form of the acid (H+ ions) at equilibrium. We can then use this information to calculate the percent ionization.
Since the pH of the solution is 2.2, we can determine the concentration of H+ ions using the formula: [H+] = 10^(-pH).
Substituting the pH value into the formula, we get [H+] = 10^(-2.2).
Now, let's calculate the concentration of H+ ions:
[H+] = 10^ (-2.2)
[H+] = 0.00631 M
The ratio of the concentration of ionized acid (H+ ions) to the initial concentration of acid (HA), multiplied by 100 gives the percent ionization. For finding the percent ionization, we will use the formula:
Percent ionization = ([H+] / [HA]) * 100
On Substituting the values into the formula, we get:
Percent ionization = (0.00631 / 2.0) * 100
                              = 0.3155 %
Therefore, the percent ionization of the acid is approximately 0.3155%.

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The result table indicate that A. The solute is a SOLID because it has a DECREASE in the amount dissolved as temperature decreases.

The solubility of a solid solute in a liquid solvent generally decreases as the temperature decreases. This is because the kinetic energy of the solute molecules decreases as the temperature decreases. As the kinetic energy of the solute molecules decreases, they are less likely to have enough energy to escape from the solution and enter the gas phase.

In the table, as the temperature decreases, the concentration of the solute in the solution decreases. This indicates that the solute is a solid and that the solubility of the solute decreases as the temperature decreases.

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Answer:smaller larger smaller smaller larger

Explanation:

Just took the test on edge

Answer:

smaller

larger

smaller

smaller

larger

Explanation:

on edge

Answer:

I believe the answer is metal denting

Explanation:

The other options are chemical changes.

Enjoy your winter break a few more days

Answer: density = mass/volume

Explanation:

A buffer containing a higher concentration of sodium acetate than acetic acid would have a pH that is slightly higher than the pKa of acetic acid.

This is because the sodium acetate will react with any added acid, such as H+ ions, to form more acetic acid and sodium ions. This reaction will help to maintain the pH of the solution, but the excess sodium ions will slightly increase the pH of the solution.

In this case, the higher concentration of sodium acetate would shift the equilibrium towards the acetate ion, resulting in a higher pH.

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Answer:

the copper would melt at the same temperature no matter how much quantity there is so 1085

Explanation:

Good scientific design involves a. replication and repetition, which is fundamental to gaining understanding by using the scientific method.

Replication and repetition are fundamental in scientific design because they allow for obtaining results that can be tested by using the scientific method and thus validated or refute in the light of new scientific evidence.

Therefore, with this data, we can see that replication and repetition are critical for a good scientific design in order to obtain reproducible results that can be used to develop theories.

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True in a crystal lattice each positive ion is surrounded by negative ions

Ions are electrically charged atoms or molecules. Anions have a negative charge while cations have a positive charge. When atoms receive or lose valence electrons, ions are created. Since electrons have a negative charge, an atom will become positively charged if it loses one or more electrons and negatively charged if it obtains one or more. The attraction between ions with opposite charges is known as ionic bonding. Ionic networks, also known as lattices, are formed when these oppositely charged ions attract one another.

For instance, each Cl atom steals an electron from a Na atom during the reaction of Na (sodium) and Cl (chlorine). As a result, every Na atom turns into a Na+ cation and every Cl atom becomes a Cl- anion. They form an ionic lattice because of the attraction between their opposing charges.

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The values for the reduction potential are: Mn2+ = +1.51 V, NO3 = +0.96 V. According to the results shown, NO3's reduction potential is lower than Mn2 reduction potential. Thus, NO3 cannot oxidize Mn2+.

Considering half reactions:

MnO4(aq) + 8H (aq) + 5e Mn2+(aq) + 4H₂O(1)

NO3 (aq) + 4H (aq) + 3e NO(g) + 2H2O(1)

Both the reactions are reduction reactions involving gain of electrons. Nitrate ion is itself reduced to NO and can oxidize any ion which is losing electrons.

Reversing the first given reaction:

Mn2+ (aq) + 4H₂O(l) → MnO4¯(aq) + 8H+ (aq) + 5e-

NO3-(aq) + 4H +(aq) + 3e- NO(g) + 2H2O(1)

(l)According to this equation, Mn (II) loses electrons to get oxidized to permanganate ion and nitrate ion is reduced to NO. These 2 reactions give result to redox reaction where Nitrate can reduce itself to NO, and oxidize the corresponding Mn (II) ion.

An oxidation and a reduction are the two components of a redox process. These two processes, which are referred to as half reactions, entail altering the oxidation state of the reacting atoms.

Chemical processes known as oxidation-reduction reactions involve the exchange of electrons between the reacting species. The oxidation status of the reactants changes in conjunction with these electron exchanges.

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Answer: Humans use energy to carry out their daily activities, like moving around, working, running etc.

Explanation:

According to the claim, one benefit of food processing is its capacity to lessen the growth of dangerous germs, which in turn prolongs the shelf life of food.

Thus, Extended Shelf Life: Perishable goods can have their shelf lives extended by using food processing procedures like canning, freezing, or adding preservatives. Customers may now preserve and enjoy these items for longer periods of time without worrying about them going bad.

Improved Food Safety: Food processing aids in lowering the risk of foodborne illnesses by employing chemicals and processing techniques that stop the growth of dangerous germs.

Thus, According to the claim, one benefit of food processing is its capacity to lessen the growth of dangerous germs, which in turn prolongs the shelf life of food.

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According to the stoichiometry of the given chemical equation, the mass of solid product formed that is CuO  is 28.97 g.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

123.55 g copper carbonate gives 79.54 g copper oxide thus, 45 g copper carbonate will give 45×79.54/123.55=28.97 g.

Thus,  the mass of solid product formed that is CuO  is 28.97 g.

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Answer:

It's (A)

Because: No, heat can only travel through solids by conduction.

Answer:

Heat ALWAYS flows from warmer objects to cooler objects.

Explanation:

Heat always transfers from warmer objects to cooler objects. For example, if you put a piece of ice in your drink, heat from your drink transfers into the ice, thus, cooling your drink and melting the ice.

The mass of ammonia that would be produced is 312.5 g

First, we will write a balanced chemical equation for the reaction

The balanced chemical equation for the reaction is

3H₂(g) + N₂(g) → 2NH₃(g)

This means

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia.

First, we will determine the number of moles of each reactant present

For Hydrogen (H₂)

Mass = 83.6 g

Molar mass = 2.016 g/mol

Using the formula

\(Number\ of\ moles = \frac{Mass}{Molar\ mass}\)

Number of moles of H₂ present = \(\frac{83.6}{2.016}\)

∴ Number of moles of H₂ present = 41.468254 moles

For Nitrogen (N₂)

Mass = 257 grams

Molar mass = 28.0134 g/mol

∴ Number of moles of N₂ present = \(\frac{257}{28.0134}\)

Number of moles of N₂ present = 9.174181 moles

Since,

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia

Then,

27.522543 moles of hydrogen gas will react with the 9.174181 moles of nitrogen gas to produce 18.348362 moles of ammonia

∴ 18.348362 moles of ammonia will be produced during the reaction

Now, for the mass of ammonia that would be produced

From the formula

Mass = Number of moles × Molar mass

Molar mass of ammonia = 17.031 g/mol

Mass of ammonia that would be produced = 18.348362 × 17.031

Mass of ammonia that would be produced = 312.49095 g

Mass of ammonia that would be produced ≅ 312.5 g

Hence, the mass of ammonia that would be produced is 312.5 g

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Answer:

physical change occured

Explanation:

it is still juice

Answer:

the day where the daylight and night are equal in the Spring

Answer:

1s^2,2s^2,2p^6,3s^2,3p^3

The Ka of chloroacetic acid is equal to 2.1 x 10⁻². The Ka for chloroacetic acid can be determined from the measured pH of a 0.11 M solution of chloroacetic acid.

To determine the value of Ka for chloroacetic acid (CH2ClCOOH), we can use the pH of the solution and the initial concentration of the acid. The equation for the dissociation of chloroacetic acid is:

CH2ClCOOH(aq) + H₂O(l) ⇌ CH2ClCOO-(aq) + H₃O+(aq)

At equilibrium, we can assume that x is the concentration of the hydronium ion (H₃O+) and the acetate ion (CH2ClCOO-), which will be equal since the acid is monoprotic. Therefore, the concentration of CH2ClCOO- will also be x. The initial concentration of CH2ClCOOH is 0.11 M.

The equilibrium expression for Ka is given by:

Ka = [CH2ClCOO-][H₃O+]/[CH2ClCOOH]

Substituting the equilibrium concentrations, we have:

Ka = (x)(x)/(0.11 - x)

Given that the pH of the solution is 1.91, we can calculate the concentration of H₃O+ using the relationship:

pH = -log[H₃O+]

1.91 = -log[H₃O+]

[H₃O+] = 10^(-pH)

[H₃O+] = 10^(-1.91)

[H³O+] ≈ 7.94 × 10⁻² M

Since the concentration of H3O+ is equal to x, we can substitute this value into the equilibrium expression:

Ka = (7.94 × 10⁻²)(7.94 × 10⁻²)/(0.11 - 7.94 × 10⁻²)

The Ka of chloroacetic acid is equal to 2.1 x 10⁻².

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Answer:

A. Do not change their energy level.

Explanation:

The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.

Answer:

= 1.615 moles

Explanation:

I did it on a test and got it right

Each statment correct phrase is completed.

1- Conformers are organisms that do not regulate their internal condition to the environment that habitat.

2- A change is an organisms surrounding that causes the organisms to react is called a stimulus.

3- soil,water and weather are abiotic factors of habitat.

4-An ecosystem consist of all the living organisms in an area.

6- ecology is the study of how organisms interact with one another and with their physical environment.

7-The many different species live together in a habitat are called a community.

8-ecology is the study of organisms and how they interact with the environment around them.

9-organisms that eat producers are called primary consumer.

10-The physical aspects of habitat are called abiotic factors.

11-A place where paticular population of species lives is called it's habitat.

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Answer:

Explanation:

Here, we want to get the pressure in mmHg

Using the ideal gas equation:

Where:

P is the pressure in atm which we want to calculate (we would convert to mmHg after calculation)

n is the number of moles which is 0.025 mole

T is the temperature in Kelvin which is 350K

V is the volume which is 2L

R is the molar gas constant which is 0.0821 L.atm/mol.K

Substituting the values, we have it that:

Finally, we have to convert this to mmHg

Mathematically:

The event that usually occurs when air is cooled to its dew point temperature is the formation of dew, frost, or fog.  

When air is cooled to its dew point temperature, it reaches its maximum saturation point. In other words, the air cannot hold any more water vapor. As a result, the excess water vapor condenses into tiny water droplets, creating dew, frost, or fog. This is because as air cools, its capacity to hold moisture decreases.

When the air cools, it loses its ability to hold moisture. In humid conditions, as the temperature decreases, the dew point temperature is reached. When the temperature drops below this point, water droplets are formed from the moisture present in the air. The formation of water droplets is visible on objects such as grass, leaves, and windows, which appear wet. This process is known as dew deposition. Similarly, when the temperature drops below freezing point, frost is formed instead of water droplets. The process of condensation of water droplets results in the formation of fog.

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