what dose pH mean on the periodic table​

The gas in the container has a 178mmHg pressure. The gas's new atmospheric pressure is 1.47 atm. Ideal gas equation 124 K are equal to 0. 1243 moles of fluorine.

Since its particles have no volume, a perfect gas should be able to condense to a volume of zero. The actual gas particles occupy space.

Condensation is the process of changing a gas into a liquid form with volume. The substance is no longer a gas, hence the gas laws do not apply to it. The actual gas particles occupy space. A liquid with volume will be created from a condensed gas.

The gas law does not apply because the substance is no longer a gas. Gas particles actually attract one another.

The ideal gas equation is expressed as

P V = n R T

8. The gas law is :

P₁ V₁ = P₂ V₂

P₂ =  P₁ V₁ / V₂

P₂ = ( 256.4 × 362 ) / 251

    = 178mmHg

9. P₁ V₁ / T₁ = P₂ V₂ / T₂

P₂ = P₁ V₁ T₂ V₂T₁

P₂ = ( 1 × 32.4 × 352) / 28.4 × 273

   = 1.47 atm

The pressure is 1.47 atm

10. P V = n R T

T = P V / n R

T = ( 2.02 × 625 ) / 0.1243 × 0.082

T = 124 K

Thus, the temperature is 124 K.

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At normal temperature, aluminum interacts with weak hydrochloric acid. With hydrochloric acid, the metal dissolves, producing colorless hydrogen gas and aluminum chloride.

Although hydrogen is non-toxic, it can accumulate indoors in places like storage storage rooms and replace oxygen, leading to asphyxiation. By giving hydrogen fuel a manufactured smell and warning customers in the event of a leak, adding odorants can help mitigate this risk to some extent.

High-Temperature Water Splitting: Redox reactions that split water into hydrogen are fueled by high temps generated by light concentrators or nuclear reactors. Photobiological Water Splitting: When water is consumed by microbes like green algae in the presence of sunshine, hydrogen is produced as a byproduct.

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Answer:

0.502mol

Explanation:

The balanced chemical equation of the reaction described in this question is as follows:

2KClO3 → 2KCl+ 3O2

According to the equation above, 2 moles of KClO3 will produce 2 moles of KCl.

Using mole = mass/molar mass to convert mass of KClO3 to moles

Molar mass of KClO3 = 39 + 35.5 + 16(3)

= 39 + 35.5 + 48

= 122.5g/mol

mole = 61.5 g ÷ 122.5g/mol

mole = 0.502mol

Since 2 moles of KClO3 will decompose to produce 2 moles of KCl.

0.502 mol of KClO3 will decompose to produce 0.502 × 2/2

= 0.502mol of KCl.

Answer:

The equilibrium shifts to the left, and the concentration of Ba2+(aq) decreases

Explanation:

Whenever a solution of an ionic substance comes into contact with another ionic compound with which it shares a common ion, the solubility of the ionic substance in solution decreases significantly.

In this case, both BaSO4 and Na2SO4 both possess the SO4^2- anion. Hence SO4^2- anion is the common ion. Given the equilibrium;

BaSO4(s) <—> Ba2+ (aq) + SO4 2- (aq), addition of Na2SO4 will decrease the solubility of BaSO4 due to the presence of a common SO4^2- anion compared to pure water.

This implies that the equilibrium will shift to the left, (more undissoctiated BaSO4) hence decreasing the Ba^2+(aq) concentration.

1) The equilibrium shifts to the left, and the concentration of \(Ba^{2+}\)(aq) decreases

Whenever a solution of an ionic substance comes into contact with another ionic compound with which it shares a common ion, the solubility of the ionic substance in the solution decreases significantly.

In this case, both BaSO₄ and Na₂SO₄ both possess the \(SO_4^{2-}\) anion. Hence  \(SO_4^{2-}\)  anion is the common ion.

Given the equilibrium;

\(BaSO_4(s) < = > Ba^{2+} (aq) + SO_4^{2-} (aq)\),

The addition of Na₂SO₄ will decrease the solubility of BaSO₄ due to the presence of a common  \(SO_4^{2-}\)  anion compared to pure water.

This implies that the equilibrium will shift to the left, (more undissociated BaSO₄ ) hence decreasing the \(Ba^{2+}\)aq) concentration.

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The amount of oxygen that are required to react with 20.0 grams of octane ( C₈H₁₈ ) in the combustion of octane in gasoline is 70.03 g.

The balanced chemical equation for the combustion of octane (C₈H₁₈) is

2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O

Molecular weight of C₈H₁₈ = 114.23 g/mol

Mass of octane = 20 g

Number of moles of octane = mass/mol.wt. = 20 g/(114.23 g/mol) =  0.175085354 mol

According to balanced equation,

2  mol of octane reacts with 25 moles of oxygen

So, 0.175085354 mol of octane would react with 0.175085354 mol × 25/2 = 2.188566926 mol of oxygen

Mass of oxygen = moles * mol.wt. = 2.188566926 mol × 32 g/mol = 70.03 g

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Electrophilic aromatic substitution reactions have various applications in organic chemistry. They are commonly used to introduce functional groups onto aromatic rings, synthesize pharmaceuticals, produce dyes, and create complex organic molecules.

In organic chemistry, electrophilic aromatic substitution reactions are crucial tools for attaching new functional groups to aromatic rings. In these reactions, an electrophile replaces a hydrogen atom on an aromatic molecule. The end output can be used in a variety of different sectors.

Pharmaceutical synthesis is one area in which electrophilic aromatic substitution is used. Chemists can change the solubility, reactivity, and bioavailability of medicinal compounds by selectively adding functional groups to aromatic rings. This enables the creation of fresh medication candidates or the advancement of current ones.

The manufacture of dyes is an additional use. Due to their conjugated systems, aromatic compounds with particular functional groups can display bright hues. Colorful dyes used in textiles, inks, and other industries are produced through the introduction of chromophores onto aromatic rings using electrophilic aromatic substitution processes.

Additionally, it is essential for the synthesis of complex organic compounds to undergo electrophilic aromatic substitution processes. Chemists can create complex chemical structures with particular functions by carefully swapping various locations on an aromatic ring. This makes it possible to synthesize natural substances, sophisticated compounds, and materials with specific qualities.

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Explanation:

\(31.5 \: g \: aommnia \: \times \: \frac{1 \: mol \: ammonia}{8 \: g \: ammonia \: } \: \times \frac{3 \: mol \: hydrogen}{2 \: mol \: ammonia} \: \times \frac{1 \: g \: hydrogen}{1 \: mol \: hydrogen} = \: 5.90625 \: g \: hydrogen \: must \: react \: \)

Product B because it has a lower energy level than Product C's transition state, which leads to Product C.

The series of reactions required to create a desired product are described by a reaction pathway. The distribution strategy for a product is determined by things like percentage yield. Atomic economics. reaction time. is a connected graph with chemical species as its nodes. If a reaction transfers material from one species to the other, an edge unites the two. An vector from reactant toward the product is depicted as the edge.

Energy, or ATP, is created by chemical reactions within our cells. All living things require energy to survive, and Adp would be a reactant that fuels a number of other chemical reactions inside cells. Cells generate energy through a process called cellular respiration.

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The steps in constructing a Born-Haber cycle for \(BaI_2\) formation involve endothermic processes for atom formation and exothermic processes for ion formation and lattice energy.

The construction of a Born-Haber cycle for the formation of barium iodide (\(BaI_2\)) from the elements involves several steps:

1. Formation of gaseous atoms:

Ba(s) → Ba(g)  (sublimation)

I2(s) → I2(g)  (sublimation)

2. Ionization of atoms:

Ba(g) → Ba+(g) + \(e^-\)  (ionization energy)

I2(g) + energy → 2I(g)  (dissociation energy)

3. Formation of ions:

Ba+(g) + \(e^-\) → Ba+(g)  (electron affinity of Ba)

I(g) + \(e^-\) → \(I^-\)(g)  (electron affinity of I)

4. Lattice energy of the compound:

Ba+(g) + \(2I^-\)(g) → BaI2(s)  (lattice energy)

Among these steps, the formation of gaseous atoms and ionization of atoms are typically endothermic processes as they require energy input. On the other hand, the formation of ions and the lattice energy of the compound are exothermic processes as energy is released during these steps.

In the case of barium iodide formation, the steps involving the formation of ions (\(Ba^+\) and \(I^-\)) and the lattice energy are expected to be exothermic as energy is released when the positive and negative ions come together to form a stable ionic compound.

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Answer:

I'm pretty sure its stimulus

Answer:

See explanation

Explanation:

We know that surface area is an important determinant factor in the study of reaction rate. This is the reason why finely divided marble chips react faster than lumps of marble in the reaction between marble chips and dilute HCl.

Now imagine that i have a lump of marble and i have finely divided marble. Then i also have a solution of 0.5 M dilute HCl. If i introduce 1g of the lump  of marble into 250 ml solution of the 0.5 M HCl in one beaker and introduce 1g of finely divided marble into another 250 ml solution of 0.5 M HCl in a separate beaker, we will notice that the finely divided marble chips reacts faster as evidenced by the quicker effervescence of CO2 gas from the later compared to the former.

Hence, smaller marble chips reacts faster with dilute HCl than a lump of marble.

Answer:

yes the above given answer is absolutely correct I agree with u man on the above.

Answer:

:)  

:)

Explanation:

The two liquids made a new substance.

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.

A chemical change occurs when some substances are transformed into different substances, with different nature and properties. In this case when both liquids are mixed a solid is formed.  This is an example of a change of state of the liquids reactants to the solid product, which has properties and characteristics different from that of the initial liquids of the mixture which is called a chemical change.

Hence, option D is correct.

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The Final Solution refers to the Nazi German plan implemented during World War II with the aim of annihilating the Jewish population of Europe. It was a systematic and state-sponsored genocide that resulted in the Holocaust.

The Final Solution refers to the Nazi German plan implemented during World War II with the aim of annihilating the Jewish population of Europe. It was a systematic and state-sponsored genocide that resulted in the Holocaust. The Final Solution was devised and ordered by high-ranking Nazi officials, particularly Adolf Hitler and his inner circle. The plan involved the mass murder of Jews through various means, including mass shootings, forced labor, and most notably, extermination camps equipped with gas chambers. These extermination camps, such as Auschwitz, Treblinka, and Sobibor, were specifically designed to efficiently murder large numbers of people. The Final Solution was an unprecedented and horrific act of genocide that resulted in the deaths of six million Jews, along with millions of other victims, including Romani people, disabled individuals, political dissidents, and other marginalized groups. It stands as one of the darkest chapters in human history, a testament to the depths of human cruelty and the consequences of unchecked hatred and prejudice.

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Answer:

A gradual change in the shape of the continents.

Explanation:

An example is tropical plant fossils are found in the Artic.

An example of geologic evolution is a gradual change in the size of continents.

Geological evolution is the process of gradual change and events in antiquity that include the steps to create the Earth.

At first, there was extreme volcanism, later the planet cooled to create the crust. Also, condensed water vapor formed the oceans and seas.

The geological history of Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).

Geological evolution studies the shape of the globe, how it formed, and the relationships of the different eras and the matter that changed during them.

Therefore, An example of geologic evolution is a gradual change in the size of continents.

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The solution volume of HCl is 13.91 mL and the volume and concentration of NaOH are 15.00 mL and 3.161 M, respectively. Then the required acid concentration is 3.409 M

HCl and NaOH react, then the reaction can be written as follows:

                             HCl + NaOH → NaCl + H₂O

Acids and bases are in a 1:1 mole ratio, which means we can use the following formula:

                                    MaVa = MbVb

with:

Ma = molarity of the acid

Va = volume of acid

Mb = base molarity

Vb = base volume

So, to calculate the molarity of HCl is:

Ma = MbVb/Va

Ma = (3.161)(15.00)/ 13.91

Ma = 3.409 M

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The average rate of growth of brassica seeds per year can vary depending on various factors such as the specific brassica species, growing conditions, and environmental factors.

The growth rate of brassica seeds per year can vary significantly depending on multiple factors. Brassica encompasses a diverse group of plants that includes various species such as broccoli, cabbage, kale, and mustard.

Each species may have its own growth characteristics and requirements. Additionally, factors like temperature, moisture, and soil quality play crucial roles in determining the growth rate.

Generally, brassica seeds follow a typical growth pattern, starting with germination, followed by vegetative growth, flowering, and seed production. The duration of each growth stage can vary among different species and environmental conditions. Some brassicas may have a relatively short life cycle, while others may require more time to reach maturity and produce seeds.

Furthermore, cultivation practices, such as fertilization, irrigation, and pest management, can also influence the growth rate of brassicas. By providing optimal growing conditions, it is possible to enhance the growth rate of brassica seeds.

Therefore, without specifying the particular brassica species and considering the specific growing conditions, it is challenging to provide an exact average rate of growth for brassica seeds per year.

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Answer:

.............hope it helps.......

Answer:

20

Explanation:

Because 240÷12=20 m÷v=d

The object's density is given with the help of the mass of the object and with the volume. The density of the object weighing 240 gm with a volume of 12 mL is 20 g/mL.

The density of an object is the volume of the solution displaced by the mass of the object. It is given by the ratio of the mass to the volume of the object and the solution displaced.

Density is an important measurement formula that is used in fluid dynamics to determine buoyancy.

The density of the object is given as,

Density (D) = Mass ÷ Volume

Given,

Mass = 240 gm

Volume = 12mL

Substituting values in the above formula the density will be calculated as:

Density (D) = 240 gm ÷ 12 mL

D = 20 gm/mL

Therefore, the density of the 240 gm object will be 20 gm/mL.

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Answer

Explanation

In the oxidation number method of balancing chemical equations, you determine the oxidation numbers of all atoms. Then you multiply the atoms that have changed by small whole numbers. You are making the total loss of electrons equal to the total gain of electrons. Then you balance the rest of the atoms.

The given equation is:

Ag + H₂S + O₂ —> Ag₂S + H₂O

Step 1. Identify the atoms that change oxidation number.

Left hand side: Ag = 0, H = +1, S = -2, O = 0

Right hand side: Ag = +1, S = -2, H = +1, and O = -2

The changes in oxidation number are:

Ag: 0 → +1; Change = +1

O: 0 → -2; Change = -2

Step 2. Equalize the changes in oxidation number.

Each Ag atom has lost one electron, and each O atom has gained two electrons.

O: 0 → -2; Change = -2,

Answer:

B: 1s²2s²2p¹

Na: 1s²2s²2p⁶3s¹

Explanation:

A = 2

B = 1

C = 2

D = 6

E = 1

Hope that helps.

Answer:

B: 1s2 2sA2pB

A = 2

B = 1

Na: 1s22sC2pD3sE

C = 2

D = 6

E = 1

The percent yield will be 95.75%

Mass of copper = 0.3295 g

Mass of filter paper + copper (II) oxide = 0.5723

Mass of filter paper only = 0.2568

Mass of copper (II) oxide = 0.5723 - 0.2568 = 0.3155

Percent yield = yield/total x 100%

                      = 0.3155/0.3295 x 100% = 95.75%

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The pH of the solution will decrease when 1.0 mL of 0.5 M H2SO4 is added to a 100 mL solution containing 1 M NH3 and 1 M NH4+.

When H2SO4 is added to the ammonia buffer solution, it reacts with the ammonia (NH3) and forms ammonium ions (NH4+). The reaction can be represented as follows:

H2SO4 + 2NH3 → (NH4)2SO4

The addition of H2SO4 increases the concentration of NH4+ ions in the solution. As a result, the equilibrium between NH3 and NH4+ is shifted towards NH4+ to maintain the buffer capacity. This increase in NH4+ concentration leads to a decrease in pH.

Ammonium ions (NH4+) are acidic, and their presence increases the concentration of H+ ions in the solution. This increase in H+ ions lowers the pH of the solution. Therefore, the pH of the solution will decrease as a result of the acid-base reaction between H2SO4 and NH3.

The exact change in pH can be calculated using the Henderson-Hasselbalch equation, which relates the pH of a buffer solution to the pKa (acid dissociation constant) and the concentrations of the acid and its conjugate base. However, without the pKa value for the ammonium ion, it is not possible to provide a precise numerical answer.

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Answer: The initial temperature of the iron was \(515^0C\)

Explanation:

\(heat_{absorbed}=heat_{released}\)

As we know that,  

\(Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})\)

\(m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]\)         .................(1)

where,

q = heat absorbed or released

\(m_1\) = mass of iron = 360 g

\(m_2\) = mass of water = 750 g

\(T_{final}\) = final temperature = \(46.7^0C\)

\(T_1\) = temperature of iron = ?

\(T_2\) = temperature of water = \(22.5^oC\)

\(c_1\) = specific heat of iron = \(0.450J/g^0C\)

\(c_2\) = specific heat of water= \(4.184J/g^0C\)

Now put all the given values in equation (1), we get

\(-360\times 0.450\times (46.7-x)=[750\times 4.184\times (46.7-22.5)]\)

\(T_i=515^0C\)

Therefore, the initial temperature of the iron was \(515^0C\)

The ways to  make a skit are:

In skit making, one can start by coming up with humorous concepts for your skit. Write out your scenario, practice it, and then perform it in front of an audience or record it. Then Continue to create fresh drafts.

Note that one can ask someone you trust's opinion should see your sketch. Then make a note of what people found amusing and not amusing.

Therefore, skit  is seen as short comedy show that can be performed by second graders.

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The distance between the two will be 0.118m

A proton's mass is specified as m = 1.67 10 27.k \sg

The formula for a proton's charge is q = 1.6 10^19C

Allow r to represent the distance between the two protons.

The weight of a proton on Earth is equivalent to the electric force of repulsion:

kq^2/r^2 = mg

(2.3×10^−28)/r^2 = 1.64×10^−26

r^2 = (2.3×10^−28)/1.64×10^−26

r = 0.118m

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9 pennies contain approximately \(2.13 x 10^23\) atoms of copper.

To solve this problem, we need to use the following steps:

Determine the molar mass of copper.

Convert the mass of 9 pennies from grams to moles.

Use Avogadro's number to calculate the number of atoms of copper.

Step 1: The molar mass of copper (Cu) is approximately 63.55 g/mol.

Step 2: The mass of 9 pennies is:

9 pennies x 2.5 g/penny = 22.5 g

Converting this mass to moles, we get:

22.5 g / 63.55 g/mol = 0.354 moles

Step 3: Using Avogadro's number (\(6.022 x 10^23 atoms/mol)\), we can calculate the number of atoms of copper:

Therefore, 9 pennies contain approximately\(2.13 x 10^23 a\)toms of copper.

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Answer: C

Explanation:

Don’t trust the other person it’s not A

*view photo for answer*

pay attention! the answer choices aren't always in the same order!