A gas takes up a volume of 35 L, and has a pressure of 4.8 atm. What is the new pressure of
the gas if the volume decreases to 23 L?

Answer:

Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms

Explanation:

Answer:

Avogadro's number

Explanation:

(that was the answer in my textbook)

Answer:20 million years ago

Explanation:

Answer:

I think the correct answer is f

Answer:

A Synthesis Reaction

Explanation:

A + B --> AB

Answer:

addition.

Explanation:

The bromine percentage is 49.42 %

Explanation:

Mass of AgBr precipitated =   0.31 g

Molecular weight of AgBr =  187.77 g mol - 1

moles of AgBr =   0.31 g by 187.77 g mol - 1 =   0.0016509 moles

moles of Br ion =  0.0016509 moles

Mass of Br ion =   0.0016509 moles into 79.904 g mol - 1 =  0.1319 g

The Total mass of compound = 0.2669 g

Percentage of bromine = 0.1319 by 0.2669 = 49.42 percent

Hence the bromine percentage is 49.42 %

Answer:

The answer is c

Explanation:

The correct option is C). [tex]\(q^{12}\)[/tex] is equivalent to (q Superscript 6 Baseline) squared.

To find the expression equivalent to [tex]\((q^6)^2\)[/tex], we apply the exponentiation rule:

[tex]\[(q^6)^2 = q^{6 \cdot 2} = q^{12}\][/tex]

Therefore, [tex]\((q^6)^2\)[/tex] is equivalent to [tex]\(q^{12}\)[/tex].

Among the given options:

- [tex]\(q^3\)[/tex] is [tex]\(q^3\)[/tex],

- [tex]\(q^8\)[/tex] is [tex]\(q^8\)[/tex],

- [tex]\(q^{12}\)[/tex] matches [tex]\(q^{12}\)[/tex],

- [tex]\(q^{36}\)[/tex] is [tex]\(q^{36}\)[/tex].

The expression equivalent to [tex]\((q^6)^2\)[/tex] is [tex]\(q^{12}\)[/tex].

Answer:

The muscle cell need to use most entry in a typical day

The cells that use most of the energy in a typical day are the cells of the brain, the cells of the heart, the cells of the lungs, the muscle cells, etc., and all the involuntary cells use the energy in a typical day because they do so spontaneously.

The body is made up of many different types of cells, some of which are voluntarily active and work while others are involuntarily work and always do their job. Even when a person is not doing much physical activity during the day, the cells of the heart (cardiac cells), brain, lungs, and other organs are constantly functioning and require continuous energy. When more physical work is done in a typical day, muscle cells or skeletal muscles require more energy and use more ATP to complete the work.

Hence The cells that use most of the energy in a typical day are the cells of the brain, the cells of the heart, the cells of the lungs, the muscle cells, etc.

Learn more about the cells here.

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The top individual action to curb atmospheric methane is reducing consumption of meat and dairy, as these industries are primary contributors to methane production. Also, minimising waste production can help, as waste decomposition in landfills generates considerable methane.

The most effective individual action to reduce atmospheric methane is to reduce consumption of meat and dairy products. Methane is produced by digestive processes in ruminant livestock, such as cows, sheep, and goats. These animals are typically raised for meat and dairy production, so by reducing our intake, we can help decrease the number of these animals, and thus decrease the amount of methane produced. This also has the effect of reducing the amount of grain required for livestock feed, since less livestock would be raised. This grain could then be used more efficiently to feed humans directly. Additionally, reducing waste production can also help mitigate methane production, because waste decomposition in landfills is another major source of atmospheric methane.

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Reducing livestock agriculture, implementing sustainable grazing practices, and feeding livestock supplements to lower methane production are key actions for reducing atmospheric methane. Additionally, transitioning to clean energy and planting trees can contribute to lowering greenhouse gas concentrations.

To reduce atmospheric methane, the most effective individual action would be decreasing livestock agriculture. Livestock, particularly ruminants like cows and goats, have microbiomes that produce methane during digestion. Additionally, implementing sustainable grazing practices and improving pasture management can mitigate carbon sequestration and offset methane emissions. Feed supplement programs that reduce methane production in livestock can also have significant impacts in reducing this potent greenhouse gas emission.

Another approach is to reduce activities that create anaerobic conditions conducive to methanogen growth, such as rice cultivation in flooded fields. Switching to clean energy sources like wind, solar, and hydropower, which do not emit methane, is also an effective strategy to combat global warming. Lastly, planting more trees can help absorb carbon dioxide, another greenhouse gas that works in tandem with methane to increase global temperatures.

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Answer:

• All traits are inherited.

• Offspring inherit one allele for a gene from each parent.

• An offspring with two identical alleles for a trait is homozygous. 

Answer:just come up with somthing

Explanation:

Answer:

Air inside causes this

Explanation:

When it is not open the air is still compressed in it while when it is opened, the air has escaped

Answer: reef fishes, small invertebrates and other marine animals

Explanation: Stonefish prey on reef fishes, small invertebrates and other marine animals which also make their home among the reefs. They're adept ambush predators, relying on their camouflage to lie in wait for their prey, before striking with their huge, powerful jaws, and swallowing their catch whole.

Answer:

100 g

Explanation:

We know the concentration is 200 g/L.

Convert 500mL to L: 500mL/1000mL = 0.5 L

Now, multiply this by 200 to cancel out the L units and get grams:

200 g/L * 0.5 L = 100 g

Thus, the answer is 100 grams.

Hope this helps!

Answer:

0.18 mol

Explanation:

the explanation is in the picture

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Answer: This unknown powder is most likely made up of ionic bond.

Explanation:

An ionic compound is defined as the compound formed due to transfer of electrons between its atoms.

As we know that like dissolves like. Therefore, an ionic compound is readily soluble in a polar solvent like water.

Hence, when an unknown white powder is added to a beaker of water and stirred. The powder disappears after a few seconds because the white powder is ionic in nature and it is made up of ionic bond.

Answer:

\large \boxed{\text{12.3 mol HCl}}  

Explanation:

We need a balanced chemical equation with moles.

            2HCl +Ca(OH)₂ ⟶ CaCl₂ + 2H₂O

n/mol:    12.3

The molar ratio is 2 mol H₂O:2 mol HCl.

[tex]\text{Moles of H$_{2}$O} = \text{12.3 mol HCl} \times \dfrac{\text{2 mol H$_{2}$O}}{\text{2 mol HCl}} = \textbf{12.3 mol HCl}\\\\\text{The reaction produces $\large \boxed{\textbf{12.3 mol HCl}}$}[/tex]

Assuming a stoichiometric relationship where 2 moles of HCl react with 1 mole of Ca(OH)₂ to produce 2 moles of H₂O, 12.3 moles of HCl would theoretically produce 12.3 moles of H₂O.

The question is about determining how many moles of H₂O will be produced from 12.3 moles of HCl reacting with Ca(OH)₂. To solve this, it's essential to know the chemical reaction involved. Unfortunately, the reaction between HCl and Ca(OH)₂, which typically forms CaCl₂ and H₂O, is not provided in full detail in the question. However, knowing that HCl reacts with base like Ca(OH)₂ to produce water and a salt, and typically in stoichiometric reactions involving a strong acid like HCl and a strong base like Ca(OH)₂, the ratio often is 2 moles of HCl react with 1 mole of Ca(OH)₂ to produce 2 moles of water (as a simplified approximation). While an exact reaction equation is necessary for a precise answer, if we assume the reaction follows a simple stoichiometry of 2HCl + Ca(OH)₂ → 2H₂O + CaCl₂, then for every 2 moles of HCl, 2 moles of H₂O are produced. Therefore, if 12.3 moles of HCl react completely with an adequate amount of Ca(OH)₂, they would produce 12.3 moles of H₂O, assuming the reaction goes to completion and all the HCl is used.

Answer : The correct option is, 23.6 g

Explanation : Given,

Mass of [tex]Mg_3N_2[/tex] = 100.0 g

Mass of [tex]H_2O[/tex] = 75.0 g

Molar mass of [tex]Mg_3N_2[/tex] = 101 g/mol

Molar mass of [tex]H_2O[/tex] = 18 g/mol

First we have to calculate the moles of [tex]Mg_3N_2[/tex] and [tex]H_2O[/tex].

[tex]\text{Moles of }Mg_3N_2=\frac{\text{Given mass }Mg_3N_2}{\text{Molar mass }Mg_3N_2}[/tex]

[tex]\text{Moles of }Mg_3N_2=\frac{100.0g}{101g/mol}=0.990mol[/tex]

and,

[tex]\text{Moles of }H_2O=\frac{\text{Given mass }H_2O}{\text{Molar mass }H_2O}[/tex]

[tex]\text{Moles of }H_2O=\frac{75.0g}{18g/mol}=4.17mol[/tex]

Now we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

[tex]Mg_3N_2(s)+6H_2O(l)\rightarrow 3Mg(OH)_2(aq)+2NH_3(g)[/tex]

From the balanced reaction we conclude that

As, 6 moles of [tex]H_2O[/tex] react with 1 mole of [tex]Mg_3N_2[/tex]

So, 4.17 moles of [tex]H_2O[/tex] react with [tex]\frac{4.17}{6}=0.695[/tex] moles of [tex]Mg_3N_2[/tex]

From this we conclude that, [tex]Mg_3N_2[/tex] is an excess reagent because the given moles are greater than the required moles and [tex]H_2O[/tex] is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of [tex]NH_3[/tex]

From the reaction, we conclude that

As, 6 moles of [tex]H_2O[/tex] react to give 2 moles of [tex]NH_3[/tex]

So, 4.17 moles of [tex]H_2O[/tex] react to give [tex]\frac{2}{6}\times 4.17=1.39[/tex] mole of [tex]NH_3[/tex]

Now we have to calculate the mass of [tex]NH_3[/tex]

[tex]\text{ Mass of }NH_3=\text{ Moles of }NH_3\times \text{ Molar mass of }NH_3[/tex]

Molar mass of [tex]NH_3[/tex] = 17 g/mole

[tex]\text{ Mass of }NH_3=(1.39moles)\times (17g/mole)=23.6g[/tex]

Therefore, the maximum theoretical yield of [tex]NH_3[/tex] is, 23.6 grams.

The maximum theoretical yield of NH3 when 100.g Mg3N2 reacts with 75.0 g H2O is 23.6 g, as H2O is the limiting reactant.

To determine the maximum theoretical yield of NH3, start by calculating the number of moles for both reactants. The molar mass of Mg3N2 is 100.93 g/mol, so you have 100 g / 100.93 g/mol = 0.991 moles of Mg3N2. The molar mass of H2O is 18.02 g/mol, so you have 75 g / 18.02 g/mol = 4.16 moles of H2O.

According to the stoichiometry of the reaction, Mg3N2 reacts with 6H2O to produce 2NH3. Thus, the moles of H2O is not enough to react with all the moles of Mg3N2, making H2O the limiting reactant. This means that the reaction will stop once all the H2O is consumed.

From the reaction stoichiometry, 6 moles of H2O produce 2 moles of NH3. So, 4.16 moles of H2O will produce (2/6)*4.16 = 1.39 moles of NH3. The molar mass of NH3 is 17.03 g/mol, so the maximum theoretical yield of NH3 is 1.39 moles * 17.03 g/mol = 23.6 g.

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Answer : The number of moles of gas inside the car is, 105.0 mole.

Explanation :

To calculate the moles of gas we are using ideal gas equation.

[tex]PV=nRT[/tex]

where,

P = Pressure of gas = 98.5 kPa = 0.972 atm     (1 atm = 101.3 kPa)

V = Volume of gas = 2600 L

n = number of moles of gas = ?

R = Gas constant = [tex]0.0821L.atm/mol.K[/tex]

T = Temperature of gas = [tex]20^oC=273+20=293K[/tex]

Now put all the given values in above equation, we get:

[tex]0.972atm\times 2600L=n\times (0.0821L.atm/mol.K)\times 293K[/tex]

[tex]n=105.0mol[/tex]

Therefore, the number of moles of gas inside the car is, 105.0 mole.

Answer:

1. Soap, and Detergent.

2.Maybe Alchohol, and Oil

3.chalk and water, and flour and water.

4. Air and fog

5.Whipped cream, and jelly

6. plaster and colored glass

An ecosystem is the specific environment in which an organism lives and includes the living and non-living components that organisms interact with. It's a site of competition for limited resources, influenced by numerous environmental variables, ultimately determining which organisms can exist within that ecosystem.

The specific environment in which an organism lives is also referred to as its ecosystem. An ecosystem is a community of living organisms interacting with each other and their non-living (abiotic) environment. This can be as small as a tide pool or as vast as the Amazon Rainforest. These ecosystems are often sites of competition for limited resources, which include organic material, sunlight, and mineral nutrients. These resources are vital for an organism's survival and growth.

Competition arises both within species (intraspecific competition) and among different species (interspecific competition). This competition is driven by the theory of natural selection, where those organisms best adapted to their environment are more likely to survive and reproduce.

Other factors affecting an organism's life within an ecosystem include the ecosystem's physical and geographic environment, such as latitude, rainfall, topography, and available species. All these collectively decide which organisms can exist within a particular habitat.

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Answer : The number of moles of [tex]NaCl[/tex] formed are, 0.69 moles.

Explanation : Given,

Moles of [tex]CaCl_2[/tex] = 0.345 mol

Now we have to calculate the moles of [tex]NaCl[/tex]

The balanced chemical equation is:

[tex]1Na_2CO_2(aq)+1CaCl_2(aq)\rightarrow 1CaCO_3(s)+2NaCl(aq)[/tex]

From the balanced reaction, we conclude that

As, 1 mole of [tex]CaCl_2[/tex] react to give 2 moles of [tex]NaCl[/tex]

So, 0.345 mole of [tex]CaCl_2[/tex] react to give [tex]2\times 0.345=0.69[/tex] mole of [tex]NaCl[/tex]

Therefore, the number of moles of [tex]NaCl[/tex] formed are, 0.69 moles.

1 Na₂CO₃(aq) + 1 CaCl₂(aq) → 1 CaCO₃(s) + 2 NaCl(aq) = 0.690 moles.

If 0.345 moles of calcium chloride (CaCl₂) react, it will produce 0.690 moles of sodium chloride (NaCl) based on the balanced chemical equation provided.

0.345 moles CaCl₂ × 2 moles NaCl / 1 mole CaCl₂ = 0.690 moles NaCl

So, 0.345 moles of calcium chloride will produce 0.690 moles of sodium chloride.

Correct question is: Calculate the number of moles of sodium chloride (NaCl) formed if 0.345 moles of calcium chloride (CaCl2) react.
1 Na2CO3 (aq) + 1 CaCl2 (aq) – 1 CaCO3 (s) + 2 NaCl (aq) = ________ Moles ?

The always true statement for the freezing of water is that the entropy change of the universe (ΔSₙₙₕₑ) is greater than zero, signaling a spontaneous process.

The statement that is always TRUE for the freezing of water is ΔSₙₙₕₑ > 0. During the freezing process, the system which is the water being frozen, undergoes a decrease in entropy (ΔS < 0) since the water molecules become more ordered. However, the entropy change of the surroundings (ΔSₙₙₕₑ) is positive because the heat rejected during freezing increases the entropy of the surroundings even more. As a result, the entropy of the universe increases (ΔSₙₙₕₑ > 0), making the overall process spontaneous as the second law of thermodynamics predicts that the entropy of the universe should increase in a spontaneous process.

Human activity affects Earth systems such as the atmosphere, hydrosphere, lithosphere, and biosphere, resulting in consequences such as climate change, soil erosion, and pollution. To reduce environmental impacts, individuals can conserve energy, reduce waste, use public transportation, and support sustainable practices. Governments and industries can also implement policies and technologies to promote sustainability.

Human activity can have significant impacts on Earth systems, including the atmosphere, hydrosphere, lithosphere, and biosphere. For example, the burning of fossil fuels releases greenhouse gases into the atmosphere, contributing to climate change. Deforestation can lead to soil erosion and loss of biodiversity. Pollution from industrial and agricultural activities can contaminate water sources.

To reduce environmental impacts, individuals can take actions such as conserving energy by using energy-efficient appliances, reducing waste by recycling and composting, using public transportation or carpooling to reduce emissions, and supporting sustainable practices such as organic farming. Additionally, governments and industries can implement policies and technologies that prioritize renewable energy sources, promote sustainable land use, and regulate pollution.

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Pumped storage hydropower is a form of hydroelectric storage and they are used for electric power systems for load balancing.

Explanation:

It is a type of hydroelectric energy storage that contains two water reservoirs at different elevations which generates power in the water moves down through turbine and it takes the power as it pumps water to upper reservoir.

The altitude may diminish the pump's performance based on the principles of specific gravity, atmospheric pressure and oxygen deprivation.

The specific gravity and pressure based on altitudes suggests that water can be pumped up to 26 feet down when operating a pump at sea level because of atmospheric pressure. The depth shows that altitude increases because of decreasing atmospheric pressure. The pump operators are server to locate their pump close to the source of water you are pumping. The elevation impacts to suction lift.

193.38 K was the initial temperature of the krypton.

Explanation:

Data given:

Initial volume of the krypton gas = 6 litres

initial pressure of the krypton gas = 0.960 atm

initial temperature of the krypton gas = ?

final volume of the krypton gas  = 7.70 litres

final pressure of the Krypton gas  = 1.25 atm

final temperature of the krypton gas = 55 degrees or 273.25+55 = 323.15 K

Applying the  Combined Gas Laws:

[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2}[/tex]

Rearranging the equation:

T1  = [tex]\frac{P1V1T2}{P2V2}[/tex]

Putting the value in the equation:

T1 = [tex]\frac{0.960 X 6 X 323.15}{1.25 X 7.70}[/tex]

T1 = 193.38 K

Initial temperature of the krypton gas is 193.78 K

Answer:

Explanation:

In 1 mole of ammonium nitrate (NH4₄NO₃), there are 2 moles of nitrogen, 4 moles of hydrogen, and 3 moles of oxygen.

The chemically correct formula for ammonium nitrate is NH4₄NO₃. When determining how many moles of each element are in 1 mole of ammonium nitrate, it is important to analyze the formula. Each molecule contains one nitrogen atom from the ammonium ion (NH4₄⁺) and one nitrogen atom from the nitrate ion (NO₃⁻), totaling two moles of nitrogen (N).

Additionally, there are four hydrogen atoms from the ammonium ion and no hydrogen from the nitrate ion, giving us four moles of hydrogen (H). Finally, the nitrate ion contains three oxygen atoms, thus there are three moles of oxygen (O). Therefore, 1 mole of ammonium nitrate consists of 2 moles of nitrogen, 4 moles of hydrogen, and 3 moles of oxygen.

The by-product of the chlorination of an alkane is​  HCl

Explanation:

Answer:

HCl

Explanation:

Answer:

260 moles of Helium

Explanation:

V = 50L

T = 20°C = (20 + 273.15)K = 293.15K

P = 125 atm

R = 0.082 L.atm / mol. K

n = ?

From ideal gas equation,

PV = nRT

P = pressure of a given gas

V = volume it occupies

n = number of moles

R = ideal gas constant

T = temperature of the gas

PV = nRT

n = PV / RT

n = (125 * 50) / (0.082 * 293.15)

n = 6250 / 24.0383

n = 260.00 moles

The child inhaled 260 moles of Helium