If you reacted 4.87g of CH4 with 11.58g of oxygen gas. How many grams of waterwould be produced in this reaction?CH4 + 202 --> CO2 + 2H2O

Answer:

F⁻(aq) + H₂O(l) ⇄ HF(aq) + OH⁻(aq)

Explanation:

According to Brönsted-Lowry acid-base theory, an acid is a substance that donates H⁺ ions. In this sense, hydrofluoric acid is an acid according to the following equation.

HF(aq) + H₂O(l) ⇄ F⁻(aq) + H₃O⁺(aq)

According to Brönsted-Lowry acid-base theory, a base is a substance that accepts H⁺ ions. In this sense, the fluoride ion is a base according to the following equation.

F⁻(aq) + H₂O(l) ⇄ HF(aq) + OH⁻(aq)

The equilibrium constant for this reaction is Kb = 1.39 × 10⁻¹¹.

Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

The calculations show that Mg(OH)₂ has a solubility of  3.5 × 10⁻⁵ M at a pH of 12.80.

The term pH, which stands for "potential of hydrogen ions," can be interpreted as a measurement of the molar concentration of hydrogen ions in a particular solution. Hence, the acidity, neutrality, or basicity of any chemical solution is often determined or specified using the power of hydrogen ions (pH).

Mg(OH)₂⇔Mg²⁺(aq)+2OH⁻(aq)

First of all, we would write the chemical equation for this chemical reaction that is appropriately balanced

The Ksp for the aforementioned chemical reaction is determined mathematically by:

Ksp = [Mg²⁺][OH⁻]²

Ksp = [x][2x]²

1.6 × 10⁻¹³ = 4x³

x = ∛4 × 10⁻¹⁴

x = 3.5 × 10⁻⁵ M.

The maximum amount of a chemical that will dissolve in a particular amount of solvent at a particular temperature is known as its solubility. Different compounds have very varying solubilities, which is a characteristic of a particular solute-solvent pair.

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measurement is the process of finding the value of any Unknown physical quantities in standard value.

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Measurement has been defined as the concept widely used in math and science to quantify an object. It is used to denote the quantification of the event or the object with respect to other or individually.

Hence, the definition of measurement is the process of determining the size or smallness of a physical amount by comparing it to a reference quantity of the same kind as the object.

It has been used to determine the quantity to be small or large based on some predetermined standard or values. It compares the physical quantity like mass can be estimated using kilograms or grams.

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Answer:

Maybe A

Explanation:

The pH of the aqueous solution is 8 means solution is basic.

pH of any solution will be calculated by using the below equation:

pH = -log[H⁺]

Given that concentration of H⁺ ions = 1.0×10⁻⁸ M

On putting this value in the above equation, we get

pH = -log( 1.0×10⁻⁸ )

pH = -(0-8) = 8

Means the given aqueous soution is basic in nature.

Hence pH is 8 means solution is basic.

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Answer:

the theoretical 100% yield of the product in milligrams is 302920 mg

Explanation:  

Given the data in the question;  

245 mg of an oil

Using the moles of our protected aldehyde calculated earlier (2.96)

the molecular weight of the product (102 g/mol) = 102000 mg/mol

so, the mass of aldehyde produced (100% yield) will be;

⇒ number of moles × molar mass

⇒ 2.96 mol × 102000 mg/mol

⇒ 302920 mol.mg / mol

⇒ 302920 mg

Therefore, the theoretical 100% yield of the product in milligrams is 302920 mg

Answer: Colloids

Explanation: they can not be separated easily but scatter light

The direction of heat transfer between two samples of carbon depends on their temperature difference, and not solely on their average kinetic energy. While the average kinetic energy of a substance is related to its temperature, it is not the determining factor for the direction of heat transfer.

When two samples of carbon come into contact, a heat transfer will occur between sample A and sample B. The direction of heat transfer is dependent on the temperature difference between the samples. Heat transfer always flows from a hotter object to a cooler object, so if sample A is hotter than sample B, heat will flow from A to B. If sample B is hotter than sample A, heat will flow from B to A.
The average kinetic energy of the molecules in a substance is related to its temperature. The higher the average kinetic energy, the higher the temperature of the substance. However, the average kinetic energy does not determine the direction of heat transfer.
It is possible for a substance with a lower average kinetic energy (and therefore a lower temperature) to transfer heat to a substance with a higher average kinetic energy (and therefore a higher temperature). This can occur if the substance with the lower temperature has a greater heat capacity, which means it can absorb more heat without a significant increase in temperature.

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The representation of carbons and hydrogens on the structure is shown on the attached image.

The structure given is 3-Methylhexane. 3-Methylhexane is a branched-chain alkane with the molecular formula \(C_{7} H_{16}\). It is also known as 2,3-dimethylbutane or isoheptane.

The molecule consists of a six-carbon chain with a methyl group (-CH3) attached to the third carbon atom from one end, and another methyl group attached to the second carbon atom from the same end, giving it a branched structure.

3-Methylhexane is a colorless liquid with a boiling point of 90-91°C and a density of 0.68 g/cm3. It is commonly used as a reference compound in gas chromatography and as a blending component in gasoline to improve octane rating.

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Taking into account the reaction stoichiometry, 128.4 grams of C are required to produce 10.7 moles of methane.

In first place, the balanced reaction is:

C + 2 H₂ → CH₄

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 1 mole of CH₄ is produced by 12 grams of C, 10.7 moles of CH₄ are produced by how much mass of C?

mass of C= (10.7 moles of CH₄×12 grams of C)÷1 mole of CH₄

mass of C= 128.4 grams

Finally, 128.4 grams of C are required.

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Answer:

false

Explanation:

not all science is good, or has good effects

False.

Science can possibly be dangerous when used by the wrong people. It can be used to create bombs, bioweapons, and much more.

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6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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One system used in the United States to encourage reduction in CO₂ emissions is the cap-and-trade system, which sets an upper limit for CO₂ emissions for the year for a given company. A company may purchase extra allowances from a company that is under its limit for the year.

Under the cap-and-trade system, companies are issued permits or allowances that represent the right to emit a certain amount of CO₂. The total number of allowances is capped at a level that corresponds to an overall reduction in emissions, and the cap is gradually reduced over time to achieve further reductions in emissions.

Companies that emit less CO₂ than their allotted allowances can sell their surplus allowances to other companies that need additional allowances to meet their emission targets. This creates a market incentive for companies to reduce their emissions and to invest in cleaner technologies.

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For exothermic reactions, ΔH is always negative, energy is considered a product, and energy is released in the reaction.

An exothermic reaction is one in which energy, usually in the form of heat, is released to the environment from the reaction. In other words, the final temperature of an exothermic reaction would always be more than the initial temperature.

This also means that heat energy is a product of exothermic reactions and this heat is released to the environment from the reaction.

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Answer:

a, d, and e is correct on edge of the nuity

Explanation:

have a good day

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

Answer:

For much of the past century, scientists studying drugs and drug use labored in the shadows of powerful myths and misconceptions about the nature of addiction. When scientists began to study addictive behavior in the 1930s, people with an addiction were thought to be morally flawed and lacking in willpower. Those views shaped society’s responses to drug use, treating it as a moral failing rather than a health problem, which led to an emphasis on punishment rather than prevention and treatment.

Today, thanks to science, our views and our responses to addiction and the broader spectrum of substance use disorders have changed dramatically. Groundbreaking discoveries about the brain have revolutionized our understanding of compulsive drug use, enabling us to respond effectively to the problem.

As a result of scientific research, we know that addiction is a medical disorder that affects the brain and changes behavior. We have identified many of the biological and environmental risk factors and are beginning to search for the genetic variations that contribute to the development and progression of the disorder. Scientists use this knowledge to develop effective prevention and treatment approaches that reduce the toll drug use takes on individuals, families, and communities.

Despite these advances, we still do not fully understand why some people develop an addiction to drugs or how drugs change the brain to foster compulsive drug use. This booklet aims to fill that knowledge gap by providing scientific information about the disorder of drug addiction, including the many harmful consequences of drug use and the basic approaches that have been developed to prevent and treat substance use disorders.

At the National Institute on Drug Abuse (NIDA), we believe that increased understanding of the basics of addiction will empower people to make informed choices in their own lives, adopt science-based policies and programs that reduce drug use and addiction in their communities, and support scientific research that improves the Nation’s well-being.

Answer:

D

Explanation:

Answer:

Explanation:

2 - chloro-2-methylbutane

The equation in which the enthalpy of formation is the same as the enthalpy of reaction is option A.

The term enthalpy has to do with the heat that is giving out or is absorbed in a reaction. We know that the enthalpy of formation would refer strictly to the heat that is given out or absorbed when a substances is formed from its constituents under standard conditions.

We know that when we are looking at the enthalpy of formation of a substance, we are looking at the way that the elements that make up the substance are able to combine and these elements that are becoming combined in the substance would have to do that under standard conditions so as to generate the equation of the enthalpy of formation of the substance.

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Answer:

\(\frac{4molPF_3}{1molP_4}\)

Explanation:

Hello

In this case, given the reaction:

\(P_4(s)+6F_2(g)\rightarrow 4PF_3(g)\)

It means that since the coefficients preceding phosphorous and phosphorous trifluoride are 1 and 4, the correct mole ratio should be:

\(\frac{4molPF_3}{1molP_4}\)

Because given the mass of phosphorous it is convenient to convert it to moles and then cancel it out with the moles on bottom of the mole ratio.

Bes regards!

Answer:

Domain

Explanation:

The broadest taxonomic group for classifying living organisms is the kingdom," as taxonomy is the science of categorizing and classifying living organisms based on their characteristics and evolutionary relationships. So the second option is correct.

The taxonomic hierarchy allows scientists to systematically organize and classify the incredible diversity of living organisms on Earth. It also helps in understanding the evolutionary relationships and shared characteristics among different groups of organisms. The broadest level in the taxonomic hierarchy, the kingdom, represents the major categories of life. All living organisms on Earth are classified into one of these five kingdoms based on their fundamental characteristics.

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complete question is below

The broadest taxonomic group for classifying living organisms is the blank,

class,

kingdom,

species,

family

Answer:

49% say human activitiy contributes global warming.

Answer:

The answer is 68%

Explanation:

including me :)

Answer:

\(V=10.12mL\)

Explanation:

Hello there!

In this case, according to the given chemical reaction, it is possible to evidence the 4:3 mole ratio between oxygen and iron (II) chloride; thus, we can compute the moles of the latter that are consumed by the given molecules of the former:

\(n_{FeCl_2}=4.32x10^{21}molec O_2*\frac{1molO_2}{6.022x10^{23}molec O_2} *\frac{4molFeCl_2}{3molO_2} \\\\n_{FeCl_2}=0.0095molFeCl_2\)

Now, since we have a 0.945-M solution of this iron (II) chloride, the corresponding volume turns out to be:

\(V=\frac{n_{FeCl_2}}{M}\\\\V=\frac{0.00956mol}{0.945mol/L}\\\\V=0.01012L\\\\V=10.12mL\)

Best regards!

Answer:

it indicates, how many atoms or ions of each type are combined in the simplest unit.

Answer:

Mass = 14.7 g

Explanation:

Given data:

Mass in g =?

Moles of K = 0.375 mol

Solution:

The Molar mass of potassium is 39.1 g/mol.

Formula

Number of moles = mass/molar mass

Mass = Number of moles × molar mass

Mass = 0.375 mol × 39.1 g/mol

Mass = 14.7 g

14.7 g K

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

0.375 mol K

Step 2: Identify Conversions

Molar Mass of K - 39.10 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

14.6625 g K ≈ 14.7 g K

Answer:

The time it takes for the radioactivity of a specific isotope to fall to half its original value

Explanation:

The half time is the time it takes for the radioactivity of a specific isotope to fall to half its original value.

In terms of radioactivity, it is the interval of time that should be needed for one half of the atomic nuclei with respect to the radioactive sample for decaying or here the time interval should be needed for the no of disintegrations per second of a radioactive

Therefore, based on the above explanation, the third option is correct.

And, the rest of the options are wrong.

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Answer:

Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.

Explanation: