example of cyclization​

2x = 350- x

3x = 350

x = 350/x

therefore,

x = 116.67cm.

so, (350 - x)cm³ = (350- 166.67)cm³ = 233.33cm³

Hence distance covered by gas A is 116.67cm that by B is 233.33cm

Answer:

V₂ = 25.065 L

Explanation:

Given data:

Initial volume = 15L

Initial pressure = 1500 mmHg (1500/760 = 1.97 atm)

Initial temperature = 299 K

Final temperature = 350 K

Final volume = ?

Final pressure = 1050 mmHg (1050/760 = 1.38 atm)

Formula:

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 1.97 atm × 15 L × 350 K / 299 K × 1.38 atm

V₂ = 10342.5 atm .L. K / 412.62 K.atm

V₂ = 25.065 L

Answer:

positive

negative

Explanation:

Usually electricity moves from positively charged to negatively charged eletrons

Deprotonation refers to the removal of a proton from a molecule, while an enolate is an anionic species formed by deprotonation of the α-carbon adjacent to a carbonyl group. An enone, on the other hand, is a molecule containing a carbon-carbon double bond and a carbonyl group.

"Deprotonate," "enolate," and "enone" are terms used in organic chemistry to describe specific reactions and functional groups. Let's break down each term:

Deprotonate: Deprotonation refers to the removal of a proton (H+) from a molecule. It is a process that involves the transfer of a proton from a molecule to a base. The resulting species is negatively charged and called an anion.

Deprotonation reactions are common in various organic reactions and play a crucial role in the formation of new bonds and the generation of reactive intermediates.

Enolate: An enolate is an anionic species that contains a carbon-carbon double bond and a negatively charged oxygen or nitrogen atom. Enolates are formed through deprotonation of the α-carbon adjacent to a carbonyl group (such as a ketone or aldehyde).

The formation of enolates is an important step in many organic reactions, such as aldol condensation and Michael addition, as enolates serve as nucleophiles or reactive intermediates.

Enone: An enone is a molecule that contains a carbon-carbon double bond (C=C) and a carbonyl group (C=O) adjacent to each other. Enones are carbonyl compounds that possess a conjugated double bond system. They exhibit unique reactivity due to the presence of both a double bond and a carbonyl group, making them valuable intermediates in organic synthesis.

Enones are involved in various reactions, including Michael additions, Diels-Alder reactions, and cycloadditions, to form complex organic compounds.

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Answer: 0.85 hertz

Explanation: Calculator said so also 0.85 is decimal form for 85

Mass of substance is 39.78kg

Density = mass / volume

Given,

Density of the substance is 1.53g/cm³

Volume of the substance is 26 L = 26000cm³

we have to find out mass by this two terms

Density = mass / volume

1.53. = mass / 26000

mass = 26000 × 1.53

= 39780gm = 39.78kg

Therefore the mass of the given substance is 39.78kg.

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The experiment mass of the product is 28.1g

What is mass ?
Mass is a physical body's total amount of matter. It also serves as a gauge for the body's inertia, or resistance to acceleration (change in velocity) in the presence of a net force. The strength of an object's gravitational pull to other bodies is also influenced by its mass.

The kilogramme is the primary mass unit in the SI (kg). Although weight is frequently measured using a spring scale rather than a balancing scale and compared directly with known masses, mass is not the same as weight in physics.

2K + Cl2 =====> 2KCl

70g Cl2 produces 2(39+35.5) = 149 g KCl

13.2g Cl2 produces 28.1g KCl

the experiment mass of the product is 28.1g

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The balanced equation for the reaction between cobalt(III) nitrate (\(Co(NO_3)_3\)) and potassium sulfide (\(K_2S\)) is:

\(3 Co(NO_3)3 + 2 K_2S - > 3 CoS + 6 KNO_3\)

In the balanced equation, the stoichiometric coefficient for potassium nitrate (\(KNO_3\)) is 6.

A molecular reaction is a chemical reaction in which two or more molecules combine to form a new compound. Molecular reactions include a wide range of natural and synthetic phenomena, ranging from enzyme-catalyzed transformations to protein folding and drug binding. In a chemical equation, stoichiometric coefficients reflect the relative number of molecules of each reactant and product.

Potassium nitrate is a chemical compound that is commonly used in fertilizers, fireworks, and rocket propellants. It is an ionic salt with the formula \(KNO_3\). Potassium nitrate is a white crystalline substance that is soluble in water. It is also known as saltpeter.What is the balanced chemical equation for the reaction of potassium nitrate and potassium sulfide?\(Co(NO_3)_3 + K_2S → CoS + 3KNO_3\)

This is the balanced chemical equation for the reaction of potassium nitrate and potassium sulfide. The stoichiometric coefficient for potassium nitrate is 3, which means that three molecules of KNO3 are required to react with one molecule of \(K_2S\). On the other hand, the stoichiometric coefficient for \(Co(NO_3)_3\) is 1, which means that only one molecule of  \(Co(NO_3)_3\) is required to react with one molecule of \(K_2S\) .

The stoichiometric coefficient for CoS is also 1, which means that one molecule of CoS is produced for every molecule of \(K_2S\)that reacts.

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Answer:

melting butter and frying eggs

Explanation:

Hope this helps please mark me brainliest

The correct answer is A.

The ratio of the volume of 2g of hydrogen to the volume of 16g of methane, both volumes at room temperature and pressure is 1:1.

To determine the ratio of the volume of 2g of hydrogen to the volume of 16g of methane at room temperature and pressure, we need to use the concept of molar volume.

First, we need to calculate the number of moles for each substance using their molar masses:

Molar mass of hydrogen (H₂) = 2 g/mol

Molar mass of methane (CH₄) = 16 g/mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

Number of moles of hydrogen = 2 g / 2 g/mol

Number of moles of hydrogen = 1 mol

Number of moles of methane = Mass of methane / Molar mass of methane

Number of moles of methane = 16 g / 16 g/mol

Number of moles of methane = 1 mol

According to Avogadro's Law, at the same temperature and pressure, equal volumes of gases contain the same number of molecules (or moles).

Therefore, the ratio of their volumes is equal to the ratio of their moles.

Since both hydrogen and methane have 1 mole each, the ratio of their volumes is 1 to 1.

Therefore, the correct answer is A 1 to 1.

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Answer:

125.4 kilopascals

Explanation:

wkdje

Answer:

125,400 pa = 125.4 kPa

Explanation:

1 pa = 0.001 kPa

&

1 kPa = 1,000 pa

Answer:

There are 3.13 x 10^24 water molecules in 5.2 moles of water.

When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

Thus, Normal definitions typically include the phrase within a relevant or appropriate range of activity since a change is likely to take place at fixed expense either an exceptionally high or low volume or expense.

Of course, the rent will probably need to adjust if sales quadruple or fall to 20% of the average level. However, as the extreme circumstances are outside of the relevant range for short-term analysis, the current rent of $2,000 is regarded as a fixed expense.)

The following are some instances of costs that are probably set within a fair range of retail sales, The yearly pay for the shop manager.

Thus, When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

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Answer:

Science textbooks around the world have become suddenly out of date. Four new chemical elements have been added to the periodic table. A big decision now lies ahead - elements 113, 115, 117 and 118 need to be given their official names and symbols.

New elements can be named after a mythological concept, a mineral, a place or country, a property or a scientist. The names have to be unique and maintain "historical and chemical consistency" . This means a lot of "-iums".

"They're Latinising the name," explains chemist Andrea Sella of University College London. "The most recent tradition has been to name them after places or after people." The places chosen tend to be where the element was discovered or first manufactured. The Swedish village of Ytterby has managed to get four named after it (ytterbium, yttrium, erbium and terbium).

No-one has yet named an element after themselves but many elements are named in tribute to important scientists. Albert Einstein was given einsteinium. This can also be a way of righting the wrongs of the past. "Lise Meitner was really the chemist who spotted nuclear fission but she was never really recognised for it because she was Jewish and a woman," says Sella. "To be able to give an element a name that reminds us of her is I think greatly important."

The naming process isn't quick. The scientists who discovered them will start things off by proposing a name. But it will be down to the International Union of Pure and Applied Chemistry (IUPAC) to approve it. A special division of the US-based group has to accept the proposal. There is then a public review period of five months before the IUPAC council gets the final approval. Once it's ready, the name is announced in the scientific journal Pure and Applied Chemistry .

Scientists sometimes get creative. Mythical names have proved popular. Promethium was named after a character from a Greek legend who stole fire from the gods to give to humans and was punished by being chained to rock so an eagle could feed on his liver. The name was meant to reflect the fact that synthesising new elements often requires sacrifice.

There is hidden meaning in the table - as in the naming of praseodymium and neodymium. They replaced didymium - wrongly thought to be an element but in fact a mixture of the two. "The reason I like them is because they're called the green twin and the new twin," says Sella. "Didymium was named after [the Greek for] twin but in fact it also means testicles."

Naming an element is not just about functionality. "There's a tremendous romance to this," he adds. "Names are always important."

Answer:

–0.360 M/s

Explanation:

aC2H6 + bCO2 + cH2O → dC2H5OH The balanced equation for the reaction is given as; 6C2H6 + 2CO2 + 3H2O → 7C2H5OH, Check! Oxygen  Product = 7 Carbon Reactant = 6 * 2  +  2  = 14 Product = 7 * 2 =14 Hydrogen d = 7.

The manner that chemical equations are written ensures that almost all of the molecules are visible.Each oxygen molecule contains two oxygen atoms, which is why the symbol for it is [2].Recall that only two oxygen atoms make up each diatomic oxygen molecule that we breathe.

Oxidation processes, addition reactions, substitution reactions, and combustion reactions are the four basic types of reactions in which carbon is primarily involved.When carbon burns with oxygen present, heat and light are produced.

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Answer:

B

Explanation:

Answer:

B.

radiant ---> thermal

Explanation:

Answer:

\( \small \sf \: 4NH_3 + 5O_2 \rightarrow 4NO + 6H_2O \\ \small \sf \: 2 KNO_3 \rightarrow 2 KNO_2 + O_2 \\ \small \sf \: Ca + 2 H_2O \rightarrow \: Ca(OH)_2 + H_2 \\ \small \sf \: 2NaHCO_3 \rightarrow Na_2CO_3 + H_2O + CO_2 \\ \small \sf \: 2 CO + O_2 \rightarrow \: 2 CO_2\)

Explanation:

A) When four moles of ammonia reacts with five moles of O2 gas, four moles of Nitrogen mono oxide liberates along with six moles of water.

\( \sf \: 4NH_3 + 5O_2 \rightarrow 4NO + 6H_2O\)

B) When two moles pottasium nitrate (KNO3) is heated it dissociates into two moles of potassium nitrite liberates along with one mole of O2 gas.

\( \sf \: 2 KNO_3 \rightarrow 2 KNO_2 + O_2\)

C) When one mole of calcium reacts with two moles water, one mole of calcium hydroxide obtained & one of hydrogen gas released.

\( \sf \: Ca + 2 H_2O \rightarrow \: Ca(OH)_2 + H_2\)

D) When two mole of Sodium bicarbonate (NaHCO3) is heated it gradually decomposes to one mole of Sodium carbonate (Na2CO3) obtained along with one mole of each Water & Carbon dioxide.

\( \sf \: 2NaHCO_3 \rightarrow Na_2CO_3 + H_2O + CO_2\)

E) The question needs to corrected,

When two moles of carbon monoxide reacts with one mole oxygen two moles of carbon dioxide is released.

\( \sf \: 2 CO + O_2 \rightarrow \: 2 CO_2\)

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The value of Y in AU for the distance between the sun and the two galaxies is 1,333.3 AU.

The given parameters;

The distance between the sun and the two galaxies is calculated as follows;

Y = 600 billion km - 400 billion km

Y = 200 billion km

150 million km = 1 AU

200 billion km = ?

\(\frac{1 \ AU}{150 \times 10^6 \ km} \times 200 \times 10^9 \ km= 1,333.3 \ AU\)

Thus, the value of Y in AU for the distance between the sun and the two galaxies is 1,333.3 AU.

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Answer:

1) The process mentioned here is " Weathering "

2) Chemical equation =

   The acid H2CO3 and the CaCO3 combine to form HCO3 + HCO3 + Ca.

Answer:

1. crystallization

Explanation:

over time a body of limestone has been squeezed and deformed by heat and pressure deep beneath the earth's surface , its structure and composition changes to form recrystallised limestone known as marble

The subshell with quantum numbers n=2 and l=2 is the 2D subshell.

The set of numbers used to describe the position and energy of the electron in an atom are called quantum numbers.

There are four known quantum numbers, and they include:

The  principal quantum number (n) indicates the energy level or shell of an electron, while the azimuthal quantum number (l) indicates the shape of the electron cloud or subshell.

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The Sun-Earth-Moon system is important because it sustains life on Earth, regulates Earth's climate, and influences natural phenomena like tides.

The Sun-Earth-Moon system plays a vital role in supporting and sustaining life on Earth. The Sun is the primary source of energy for our planet, providing heat and light necessary for photosynthesis, the process by which plants convert sunlight into food and oxygen. Sunlight is also crucial for maintaining Earth's temperature and driving weather patterns.

The Moon, as Earth's only natural satellite, contributes to several essential functions. Its gravitational pull creates the tides, which influence coastal ecosystems and shape coastal landscapes.

The Moon's orbit also stabilizes Earth's axial tilt, providing a stable climate for life to thrive. Additionally, the Moon's phases have cultural and historical significance, influencing human activities such as agriculture, navigation, and calendar systems.

The Sun-Earth-Moon system's interactions are responsible for natural phenomena like eclipses, both solar and lunar, which have fascinated humans throughout history and continue to be important for scientific study and exploration.

Understanding these celestial events enhances our knowledge of astrophysics and helps us comprehend the vastness and complexity of the universe.

Furthermore, the study of the Sun-Earth-Moon system provides insights into celestial mechanics, orbital dynamics, and the broader field of planetary science. By examining the interplay between these celestial bodies, scientists can gain a deeper understanding of Earth's place in the universe and explore potential habitable conditions on other celestial bodies.

Overall, the Sun-Earth-Moon system is of immense importance as it sustains life, regulates climate, influences natural phenomena, and provides a platform for scientific exploration and discovery.

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The balanced chemical equation for rusting iron is:

4Fe + 3O2 = 2Fe2O3

If we divide 1.0x10^9 by Avogadro's number, we get the amount of moles of oxygen which is 1.6611x10^-15 moles.

From the chemical equation we know that it takes 3 moles of oxygen to produce 2 moles of iron oxide. So if we multiply the moles of oxygen calculated by 2/3, we can get the moles of iron oxide.

(1.611x10^-15)(2/3)  = 1.107419x10^-15 moles of iron oxide.

If we multiply the moles of iron oxide by the molar mass of iron oxide, we get how many grams of iron oxide would be produced by 1 billion oxygen atoms. Which is the same thing as how many grams of iron oxide contain 1 billion oxygen atoms.  

(1.107419x10^-15)(159.69) = 1.8x10^-13 grams of Fe2O3  

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Answer:

b or c but most likely  it is c

Explanation:

B.   I just did this not lying a few minutes ago LOL

GL on the rest of your test!!!! :D

Explanation:

the answer is internal energy..much like rubbing hands 2gether to make them warmer..

Answer:

Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organisms

Explanation:

The theoretical yield (g) of HI produced by the reaction is 18.93 g.

The reaction is given as :

H₂(g) + I₂(s)   ---->   2 HI(g)

given that ;

mass of H₂ = 15.28 g

mass of I₂ = 18.82 g

moles of H₂ = mass / molar mass

                    = 15.28 / 2

                    = 7.64 mol

moles of  I₂ = mass / molar mass

                    = 18.82 / 253.80

                    = 0.074 mol

therefore the  I₂ is the limiting reactant. so, the amount of HI produced is depend upon the  I₂.

1 mole of  I₂ produce = 2 mole of HI

0.074 mole of  I₂ = 2 × 0.074 = 0.148 mol of HI

Theoretical yield of HI = 0.148 × 127.91

                                     = 18.93 g

Thus, The theoretical yield of a reaction is the amount of product obtained if the limiting reactant is completely converted to product. If 15.28 g H₂ is mixed with 18.82 g I₂,  the theoretical yield (g) of HI produced by the reaction is 18.93 g.

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Answer: d=m/v

Explanation: The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.