(e) A 0.050 mol sample of a hydrocarbon was burned in excess oxygen.
The products were 3.60 g of water and 6.60 g of carbon dioxide.
(i) Calculate the number of moles of carbon dioxide produced.
Relative atomic masses: C = 12; O = 16.
Moles of carbon dioxide =
*
(2)

Answer:the answer is B

Explanation:

Answer:

Compounds

Explanation:

A compound is a substance formed when two or more elements are chemically joined. (For example Water, salt, and sugar are compounds.) When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

One illustration of receptor-mediated endocytosis seems to be the uptake and cholesterol into cells.

The process of endocytosis involves engulfing a substance or particle by both the cell membrane in order to transport it into the cell. Pinocytosis and macrophages are the terms used to describe these two processes, respectively (cell drinking). As the cytoplasm merges with that as well, a vesicle goes through exocytosis, expelling its constituents from the outside the cell.

Endocytosis is the process whereby the cells take throughout foreign material by encasing it in their membrane. The two primary subtypes of endocytosis are macrophages and pinocytosis. The three primary kinds of endocytosis appear to be responsible for the synthesis, pinocytosis, as well as transcription factor endocytosis.

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11,169 grams of iron is produced from 300 moles of carbon monoxide reacting with 15,000 grams of ferric oxide.

The balanced chemical equation shows that 3 moles of CO react with 1 mole of \(Fe_2O_3\) to produce 2 moles of Fe. Therefore, we can calculate the number of moles of Fe produced from 300 moles of CO reacting with \(Fe_2O_3\) as follows:

1 mole \(Fe_2O_3\) produces 2 moles Fe

300 moles CO produces (2/3) x 300 = 200 moles Fe (by stoichiometry)

Next, we can use the molar mass of Fe to convert moles to grams:

1 mole Fe = 55.845 g Fe

200 moles Fe = 200 x 55.845 = 11,169 g Fe

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Answer:

200–300 mg/day ascorbic acid from vitamin C-rich foods [10]. ... as high as 3 g ascorbic acid taken every 4 hours would produce peak ... individuals should ensure that they meet the RDA for vitamin C [4,8].

Explanation:

The cyclohexane ring is essentially free of ring strain because:

What is cyclohexane?

Cyclohexane is a cyclic hydrocarbon with the molecular formula C6H12. It is a colorless, flammable liquid that is commonly used as a nonpolar solvent in chemical reactions and as a starting material for the synthesis of other compounds. Cyclohexane is a cycloalkane, which means it contains a closed ring of carbon atoms.

All of these factors contribute to the stability of the chair conformation of cyclohexane and the absence of ring strain in the molecule.

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Answer:

yes

Explanation:

Yes you can make the pH of a dilute strong acid higher than the pH of a weak acid. ... The lower the pH, the more is present in the solution. Strong acids like hydrochloric acid (HCl) almost completely dissociate into water to form ions. Weaker acids like ethanoic acid () only partially dissociates to form and ions.

There are several illicit drugs that are produced in dangerous clandestine labs across the country. One notable example is methamphetamine, commonly known as meth.

The production of methamphetamine typically involves the synthesis of pseudoephedrine or ephedrine, which are found in certain over-the-counter medications. These precursor chemicals are then combined with a mixture of other toxic substances, such as solvents, acids, and reagents, in makeshift labs often located in residential areas or remote locations.

The clandestine production of methamphetamine poses significant risks not only to those involved in its manufacture but also to the surrounding communities. The process involves handling hazardous chemicals, which can lead to fires, explosions, and toxic fumes. The byproducts and waste generated during the manufacturing process are also highly toxic and pose environmental and health hazards.

Law enforcement agencies and regulatory bodies are actively involved in combating the production and distribution of illicit drugs like methamphetamine to protect public safety and health. It is important to note that the production, possession, and distribution of illicit drugs are illegal and carry severe legal consequences.

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Burning of diesel and coal produces a suffocating and corrosive gas-Sulphur dioxide gas, and Petrol engines give off gaseous oxides of nitrogen. Oxides of these sulphur and nitrogen dissolves in rain water and causes Acid Rain

Answer:

Burning of coal and diesel release sulphur dioxide gas. It is an extremely suffocating and corrosive gas. Sulphur dioxide and nitrogen oxide dissolve in rain water to form acid. Such rain is called acid rain.

Explanation:

Answer:

Not quite, they are different catagories.

Explanation:

A molecule is two or more atoms connected to each other. An element is an atom with a name. Think of water, a single water molecule is called H2O because it has two hydrogen atoms and one oxygen atom. Hydrogen and oxygen are both elements. Another way to see it is like, there are many kinds of animals(atoms). A specific animal would be a cat or a bird or something(the elements).

TLDR: An element can be part of a molecule, but is not one on its own.

The function of Y would be to keep oxygen-rich blood and oxygen-poor blood separate. The last option is the correct one.

Y is the septum

The septum is a structure of the heart that separates the left atrium from the right atrium as well as the two ventricles.

Thus, the structure prevents oxygenated blood from mixing with deoxygenated blood.

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Prairie dogs are a type of squirrels and they are classified in the group of rodents. The family of prairie dog is Sciuridae.

The taxonomical classification of an animal is to indicates its kingdom, phylum, class, order,  family, genus and species. All the known animals, plants and other livings are classified to these 7 categories.

The prairie dogs are ground squirrels usually seen in the prairie grass lands. They are in the mammalian class and in the order of Rodentia.

They are classified  to the family of Sciuridae.

Genus of prairie dogs is cynomys and their species can be of various types such as ludovicianus, gunnisoni, mexicanus etc based on the regions they reside.

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The molecule has three electron pairs and is trigonal planar geometry. Carbonate ion is found in limestone as calcium carbonate.

Each atom is composed of a nucleus and one or greater electrons sure to the nucleus. The nucleus is product of one or more protons and a number of neutrons. best the maximum common form of hydrogen has no neutrons. An atom is the smallest unit of everyday matter that bureaucracy a chemical detail.

An atom is a particle of depend that uniquely defines a chemical element. An atom includes a relevant nucleus this is surrounded via one or extra negatively charged electrons. The nucleus is definitely charged and contains one or extra pretty heavy debris known as protons and neutrons.

An atom itself is made from 3 tiny types of debris referred to as subatomic particles protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom referred to as the nucleus and the electrons fly around above the nucleus in a small cloud.

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Answer:

2, 1, 2,1

Explanation:

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

AgNO3 + CuCl2 → AgCl + Cu(NO3)2

The reaction is between silver nitrate (AgNO3) and copper (I) chloride (CuCl2) to form silver chloride (AgCl) and copper nitrate (Cu(NO3)2.

However, this above equation is not BALANCED because the number of atoms of each element on both sides of the equation does not equate i.e. are not the same. To balance the equation, we have to make use of COEFFICIENTS, which are numbers used in front of each element in order to balance the equation.

The balanced equation is as follows:

2AgNO3 + CuCl2 → 2AgCl + Cu(NO3)2

From the above balanced equation, we can observe that coefficients used to balance the equation is in the order: 2, 1, 2,1

To transform an alkene bonded to a tert-butyl group and three hydrogens to a tert-butyl group bonded to CH2CH2OH, the best reagents are H2SO4 and H2O.

H2SO4 is used to protonate the double bond and form a carbocation, which can then undergo nucleophilic attack by water to form the final product. This reaction is known as hydration of alkenes.To perform the transformation, the alkene is first protonated with H2SO4 to form a carbocation intermediate.

Water acts as a nucleophile and attacks the carbocation to form the alcohol product. This reaction is shown below:Thus, the final product formed is tert-butyl group bonded to CH2CH2OH.Another way to perform this transformation is by using oxymercuration-demercuration.

In this reaction, the alkene is first treated with mercuric acetate and water to form a cyclic intermediate.

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Answer: the statement issues are addressed by the people working together is true about activation.

Explanation:

Answer:

0.01.

Explanation:

This is because, if you divided one rectangle by ten, it will give 0.1

That is 1/10 = 0.1

If each of the smaller rectangles is divided by 10.

It will be 0.1/10 which will be equal to 0.01.

The rectangles will be 0.01 each.

In summary, the reaction under standard conditions is exergonic as it releases energy, while the reaction in yeast mitochondria is endergonic as it requires energy for the reaction to proceed.

In order to determine whether a reaction is exergonic or endergonic, we need to understand the concepts of energy release and energy absorption. An exergonic reaction releases energy, while an endergonic reaction requires or absorbs energy.

The reaction under standard conditions can be considered exergonic because it occurs spontaneously and releases energy. Standard conditions typically refer to reactions at a constant temperature of 25 degrees Celsius, a pressure of 1 atmosphere, and reactants and products at standard concentrations.

On the other hand, the reaction occurring in yeast mitochondria is endergonic. This is because the mitochondria require energy to convert reactants into products. In this case, the reactants need to be coupled with an input of energy, such as adenosine triphosphate (ATP), to proceed towards the formation of products.

In summary, the reaction under standard conditions is exergonic as it releases energy, while the reaction in yeast mitochondria is endergonic as it requires energy for the reaction to proceed.

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Based on the data provided:

The variables in an experiment are those factors or quantities that can be changed or controlled by the researcher while conducting the research.

There are three types of variables in an experiment:

An experiment usually states a hypothesis that is tested.

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As sediments settle on land or water : b) sediments settle and create layers and cement together over time.

As sediments settle on land or water, they undergo a process that is called sedimentation. Sedimentation is the process of settling and accumulation of the sediments, which can take place in different environments such as lakes, rivers, oceans, or on land.

Over time, these sediments become compacted and cemented together, forming sedimentary rocks. The layers of sedimentary rocks can also contain fossils, providing important clues to the history of life on Earth and sediments do not float to the top to create hills or become a gas over time.

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Answer:

distance/time is the answer

Answer:

Law of Conservation Matter

On changing the ratio of baking soda and vinegar changes the amount of carbon dioxide produced is true, because each species will depends on both reactants.

Chemical reaction between baking soda and vinegar is shown below in the attached image in which the formation of carbon dioxide, water and sodium acetate takes place. So the formation of carbon dioxide depends on the baking soda and baking soda reacts with vinegar to form sodium acetate so change in the ratio will changes the amount of carbon dioxide.

Hence on changing the ratio of reactants and vinegar changes the amount of carbon dioxide.

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The empirical formula of the compound is Fe₂O₃, representing the simplest mole ratio of Fe and O.

The empirical formula represents the relative proportion of elements in a compound, showing the simplest, whole-number ratio of atoms.

It is often referred to as the molecular formula. While molecular formulas provide the actual number of atoms in a molecule, empirical formulas convey the ratios of the elements.

In the given compound composed of 72.36% Fe and 27.64% O by mass, the empirical formula is Fe₂O₃.

To determine the empirical formula:

Assume 100 g of the compound.

Calculate the number of moles for each element.

Find the ratio of moles for each element.

Divide each mole value by the smallest mole value to obtain the simplest mole ratio.

Write the empirical formula.

Following these steps:

Assuming 100 g of the compound, there are 72.36 g of Fe and 27.64 g of O.

Calculate the moles of Fe: Moles of Fe = (72.36 g Fe) / (55.85 g/mol) = 1.294 mol Fe

Calculate the moles of O: Moles of O = (27.64 g O) / (16 g/mol) = 1.7275 mol O

The ratio of moles is Fe:O = 1.294 mol Fe : 1.7275 mol O

Dividing each value by the smallest value of 1.294, we get Fe:O = 1 : 1.33

The empirical formula is Fe₂O₃.

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Answer: When the concentration of HI is tripled then the rate increases by a factor of 9.

Explanation:

The rate of a chemical reaction is the measure of concentration of reactants or the measure of concentration of products with respect to time.

As the rate of decomposition of HI is given as follows.

\(Rate = k[HI]^{2}\)

When concentration of HI is tripled then the new rate will be as follows.

\(R^{'} = k[HI]^{2}\\= k \times (3)^{2}\\= 9k\)

This shows that rate increases by a factor of 9.

Thus, we can conclude that when the concentration of HI is tripled then the rate increases by a factor of 9.

Coal mining can cause acid mine drainage (AMD) because when coal is exposed to air and water during the mining process, it can oxidize and release sulfuric acid.

This acid then mixes with water and other chemicals in the mining area, such as heavy metals, which can contaminate nearby water sources. The acidic water can also leach metals and minerals from the surrounding rocks, further contributing to the contamination.
If a stream in the forest had a low pH, there might be visible signs of damage to the surrounding ecosystem. For example, trees near the stream may be dying or have discolored leaves. There may also be an absence of certain types of aquatic life that cannot survive in acidic water. If a stream has an acceptable pH but still suffers from AMD contamination, there may be visible signs of discoloration or sediment buildup in the water. However, these visual indications are not sufficient to determine if the water is "safe." Additional testing and analysis would be needed to determine the level of contamination and potential health risks.
The water that comes out of your tap most likely has a pH between 6.5 and 8.5. This range is considered safe for drinking and is maintained through a variety of factors in the municipal water system and plumbing of buildings. Factors that can affect the water's pH include the type of treatment process used, the age and condition of pipes, and the presence of certain minerals or chemicals in the water supply.
AMD is a risk not only at a local level but potentially for plants, animals, and people hundreds of miles away from the mine. Acidic water can travel through groundwater and surface water systems, contaminating nearby streams, rivers, and lakes. This can have a significant impact on the ecosystem and aquatic life in these areas, as well as potentially harming the health of people who rely on these water sources for drinking, recreation, or agriculture.
If I were in charge of preventing AMD in a modern mine, I would prioritize implementing a zero-discharge policy and implementing a comprehensive monitoring system to detect any potential contamination. This could include regular testing of water sources and surrounding ecosystems, as well as implementing best practices for waste management and water treatment. Additionally, I would work to educate and engage the local community in efforts to prevent AMD and promote sustainable mining practices.

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The volume occupied by the sample is 8.4 cm³

The density is the ratio of mass of the object to its volume.

Given is the mass m =14.7 g and the density is 1.75 g/cm³, then the volume will be

ρ = m/ V

V =m /ρ

Substitute the values, we get

V = 14.7 /1.75

V = 8.4 cm³

Thus, the volume of the sample is  8.4 cm³.

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Answer:

Due to the difference in the relative atomic masses and therefore, the molecular masses of Zn and Pb, one mole of Zn is about 3.2 times lighter than one mole of Pb

Explanation:

From the periodic table, we have;

The atomic number of zinc, Zn = 30

The atomic mass of zinc, Zn = 65.38 amu

The molar mass of zinc, Zn = 65.38 g/mol

The atomic number of lead, Pb = 82

The atomic mass of lead, Pb = 207.2 amu

The molar mass of lead, Pb = 207.2 g/mol

Therefore, whereby equal number of moles of Zn is lost and Pb is gained, we have;

Mass of 1 mole of Zn = 65.38 grams

Therefore, 1 gram of Zn = 1/65.38 moles = 0.0153 moles

0.12 grams of Zn = 0.12×0.0153 = 0.00184 moles of Zn

Given that equal number of moles of Zn and Pb are involved in the reaction, the number of moles of Pb gained = 0.00184 moles

The mass of Pb gained = Number of moles of Pb gained × Molar mass of Pb

The mass of Pb gained = 0.00184 × 207.2 = 0.38 g ≈ 0.4 g.

Amount of Pb gained = 0.43 g ≈ 0.4 g