A compound contains only carbon, hydrogen, and oxygen. Combustion of 8.544 mg of the compound yields 12.81 mg CO2 and 3.50 mg H2O. The molar mass of the compound is 176.1 g/mol. What are the empirical and molecular formulas of the compound

Covalent bonds are a type of chemical bond where atoms share electrons in order to achieve a full outer shell and become more stable. This type of bonding usually occurs between non-metal atoms.

Covalent bonds can be either polar or nonpolar. In a nonpolar covalent bond, the atoms share electrons equally, resulting in a molecule with no charge. In a polar covalent bond, the electrons are shared unequally, resulting in a molecule with partial charges on different ends.

Therefore, Covalent bonds are important in many biological molecules, such as DNA, proteins, and carbohydrates. They are also important in the formation of many chemical compounds, including water and many organic compounds.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.98grams are present in  45.73 moles of  BCl\(_3\).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of  BCl\(_3\) =given mass of BCl\(_3\) ÷ molar mass of BCl\(_3\)

Molar mass of 1 mole of BCl\(_3\) = 46.264 g/mol

number of moles of  BCl\(_3\) = 45.73 moles

Substituting all the given values in the above equation, we get

45.73 moles =mass of BCl\(_3\)÷46.264 g/mol

mass of BCl\(_3\)   =0.98grams

Therefore, 0.98grams are present in  45.73 moles of  BCl\(_3\).

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Answer:

do you mean DeF?

Explanation:

The lattice constant, also referred to as the lattice parameter, is 4.73 A for a single crystal. For simple cubic, body centered and face centered cubic lattice the calculations given below:-

The surface density of atoms on a single crystal plane can be calculated using the following formula:

= surface density

= 2 x Z / a^2

here "Z" is the number of atoms in the unit cell along the perpendicular direction to the plane and "a" is the lattice constant.

Let's calculate the surface density of atoms on

(i) (100),

(ii) (110), and

(iii) (111) planes for each type of cubic lattice:-

(a) Simple cubic lattice:

(i) (100) plane:- Z = 1

(there is only one atom in the unit cell along the perpendicular direction to the (100) plane).

= surface density

= 2 x 1 / (4.73^2)

= 4.6 x 10^19 atoms/cm^2

(ii) (110) plane:- Z = 2

(there are two atoms in the unit cell along the perpendicular direction to the (110) plane).

= surface density

= 2 x 2 / (4.73^2)

= 9.2 x 10^19 atoms/cm^2

(iii) (111) plane:- Z = 3

(there are three atoms in the unit cell along the perpendicular direction to the (111) plane).

= surface density

= 2 x 3 / (4.73^2)

= 13.7 x 10^19 atoms/cm^2

(b) Body-centered cubic lattice:

(i) (100) plane:- Z = 2

(there are two atoms in the unit cell along the perpendicular direction to the (100) plane).

= surface density

= 2 x 2 / (4.73^2)

= 9.2 x 10^19 atoms/cm^2

(ii) (110) plane:- Z = 4

(there are four atoms in the unit cell along the perpendicular direction to the (110) plane).

= surface density

= 2 x 4 / (4.73^2)

= 18.4 x 10^19 atoms/cm^2

(iii) (111) plane:- Z = 4

(there are four atoms in the unit cell along the perpendicular direction to the (111) plane).

= surface density

= 2 x 4 / (4.73^2)

= 18.4 x 10^19 atoms/cm^2

(c) Face-centered cubic lattice:

(i) (100) plane:- Z = 4

(there are four atoms in the unit cell along the perpendicular direction to the (100) plane).

= surface density

= 2 x 4 / (4.73^2)

= 18.4 x 10^19 atoms/cm^2

(ii) (110) plane:- Z = 4

(there are four atoms in the unit cell along the perpendicular direction to the (110) plane).

= surface density

= 2 x 4 / (4.73^2)

= 18.4 x 10^19 atoms/cm^2

(iii) (111) plane:- Z = 6

(there are six atoms in the unit cell along the perpendicular direction to the (111) plane).

= surface density

= 2 x 6 / (4.73^2)

= 27.6 x 10^19 atoms/cm^2

So, these are the surface densities of atoms on (100), (110), and (111) planes for simple cubic, body-centered cubic, and face-centered cubic lattices.

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Using Boyle's law, As pressure is decreased, the volume will increase.

Boyle's Law describes how pressure and volume relate when the temperature is constant.

P1V1 = P2V2

When temperature is kept constant in this equation, pressure and volume have an inverse relationship.

When the volume is reduced, molecules have less room to move and collide more frequently, which raises the pressure. If the volume is increased, the molecules have more room to move, collisions occur less frequently, and the pressure is reduced.

The combined gas law, however, governs the connection between the three quantities when temperature is included.

As the gas volume decreases, the molecules hit the walls more frequently, raising the pressure; conversely, as the volume grows, the molecules must travel farther to contact the walls, reducing the frequency with which they do so and raising the pressure.

According to Boyle's law, a gas's pressure tends to decrease as its volume rises.

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Answer:

A niche is a specie's function in its habitat or its level on the food chain, so two species competing at the same level for the same food and habitat eventually one species will have to migrate or starve due to lack of food.

Answer:

203g

Explanation:

Multiply #moles by cobalt's molar mass:

molar mass= 58.9332g/ 1 mole)

3.45 mole Cobalt (58.9332g/ 1 mole)= 203g <-- 3 significant figures

According to the mole concept, mass of 3.45 moles of cobalt is 203.30 g.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Mass of 3.45 moles of cobalt is obtained as, mass=number of moles ×molar mass

Substitution of values gives ,mass=3.45×58.93=203.30 g.

Thus, the mass of 3.45 moles of cobalt is 203.30 g.

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Answer:

A. HCl

Explanation:

on the left hand side we have reactants.

hope it helps!

The property of acids which would cause acid rain to damage buildings over time is:

Acids react with limestone.

The correct answer choice is option c.

This simply means that acids has this property which corrodes the surface they come in contact with especially stones.

However, this can be done by coating the surface of metals, or carbonate by coating it with other metals. By so doing, this can prevent acid rain damage to it.

That being said, by default, concentrated acids are highly corrosive.

Coating surfaces of metals can prevent acid rain damage to it

This refers to a substance which when dissolved in water, it produces hydrogen ion as the only positive ion in the solution.

So therefore, the property of acids which would cause acid rain to damage buildings over time is acids react with limestone.

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Answer:

0.716

Explanation:

First, write the balanced equation:

3 H2CO3 + 2 Fe(OH)3 ----> Fe2(CO3)3 + 6 H2O

Second, go from the molarity of H2CO3 to liters of Fe(OH)3

(Pull mole ratio from balanced equation)

1.22/1L  x  0.0880/1  x  3molH2CO3/2molFe(OH)3 x 1/0.225L

Use calculator, and you end up with 0.7157333

Round to 0.716

The European Union's imposition of new tariffs on certain goods entering the region from other countries falls under the economic segment of the general environment. This segment includes factors such as economic growth, inflation, unemployment rates, and trade policies.

The imposition of tariffs is a significant trade policy decision that impacts not only the EU but also the countries exporting to it.

Tariffs are taxes on imported goods that make them more expensive for consumers and businesses in the importing country. By imposing tariffs, the EU aims to protect its domestic industries from foreign competition and reduce the trade deficit. However, this move may also have negative consequences, such as increased prices for consumers and retaliatory measures from exporting countries.

In analyzing the economic segment of the general environment, it is essential to consider the impact of policies such as tariffs on businesses and the economy as a whole. This can include evaluating how tariffs affect supply chain management, market competition, and consumer demand. Additionally, it is essential to understand how tariffs may impact international relations and global trade agreements.

In conclusion, the European Union's imposition of new tariffs falls under the economic segment of the general environment, and its impact on businesses and the economy should be carefully analyzed.

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Answer:

I think it would be 0 since cations and anions must always combine in such a way so that their charges cancel.

Answer:

When Epsom salt (magnesium sulfate) dissolves, it separates into its ions: a magnesium ion (Mg2+) and a sulfate ion (SO4 2-), which results in hard water. When hard water and soap are mixed, the magnesium ion reacts with soap molecules and forms a solid material called a precipitate, which does not dissolve.

Explanation:

can i have brainlest

When a cell in a lead-acid battery delivers exactly 2.00 v of cell potential the ΔG° is -386 kJ.

Given,

n = 2

F = 96500 Columbs

E° (cell) = 2V

Relation between Gibbs free energy and potential difference is given as,

ΔG° = -nF E°(cell)

Where,

n = number of moles of electrons transferred = 2

F = Faraday = 96500 columbs

E° (cell) = potencial difference

∴ ΔG° = -nF E°(cell)

= - 2  x 96500 x 2

= -386kJ

Hence, the ΔG° for the following reaction is -386 kJ.

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The question is incomplete, the complete question is;

A pool owner adds a compound containing chlorine to the pool to disinfect it. However, too much of the compound is added. As a result, the water becomes too acidic. What could the pool owner do to reduce the acidity of the pool?

He could add another acid to the pool to compete with the existing acid.

He could add a metal salt to the pool to precipitate the acid.

He could add a base to the pool to neutralize the acid.

Answer:

He could add a base to the pool to neutralize the acid.

Explanation:

The reaction between an acid and a base is called a neutralization reaction. A neutralization reaction is defined as a reaction between an acid and a base leading to the formation of salt and water only.

If the owner of the pool discovers that the pool has become too acidic, all that needs to be done is to introduce a base into the pool that will neutralize the acid according to the reaction;

Acid + base ------> salt + water

The reaction is an exothermic reaction and the products are typically more stable compared to the reactants.

In an exothermic reaction, the products of the reaction generally have lower potential energy (PE) than the reactants. This means that the products are more stable than the reactants.

During an exothermic reaction, energy is released in the form of heat or light. This release of energy indicates a decrease in potential energy, resulting in a more stable state for the products.

Therefore, in an exothermic reaction, the products are typically more stable compared to the reactants.

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Answer:

2.08

Explanation:

52/25=2.08

Answer:

Explanation:

"An early link between cancer and a chemical was found in the late 1700s. An English physician noted that a large number of chimney sweeps had cancer of the scrotum due to exposure to soot, which contains chemicals known as polycyclic aromatic hydrocarbons. Since then, many more chemicals have been identified as known or suspected causes of cancer. "

Answer:

Chemical cause cancer

Explanation:

Answer:

biofuel as it have many benefits and are emitted with greater advantages

of course migration

Explanation:

if you need help again i'll be there.

Answer:

yea its migration

Explanation:

Answer:

The primary reason why cars in Mombasa rust faster than those in Nairobi is because the humidity ( water evaporation rate) in Mombasa is higher than that of Nairobi. Since Mombasa has higher temperatures the rate of water evaporation is higher which results into a higer humidity.

Explanation:

This is why cars in Mombasa rust faster than those in Nairobi

the volume of a 1.80 M solution of potassium chloride that is required to prepare 0.100 L of a 0.600 M solution is 0.0333 L, or 33.3 mL.

To determine the volume of a 1.80 M solution of potassium chloride that is required to prepare 0.100 L of a 0.600 M solution, we can use the formula:

M1V1 = M2V2

where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.

Let's use this formula to solve the problem:

M1 = 1.80 M (since we are starting with a 1.80 M solution)

V1 = ? (what we are trying to find)

M2 = 0.600 M (since we want to prepare a 0.600 M solution)

V2 = 0.100 L (since we want to prepare 0.100 L of the final solution)

Substituting these values into the formula, we get:

1.80 M x V1 = 0.600 M x 0.100 L

Simplifying, we get:

V1 = (0.600 M x 0.100 L) / 1.80 M

V1 = 0.0333 L, or 33.3 mL

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C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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The molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.

Molarity is defined as the ratio of moles of solute to the volume of solution.

Mathematically,

Molarity = moles of solute / volume of solution

Given,

Initial volume of CuSO4 = 4 ml = 4/1000 = 0.004 l

Molarity of CuSO4 = 0.0250 m

By substituting all the values, we get

0.025 = moles/ 0.004

moles = 0.025 × 0.004 = 0.000100 mol

Moles = 0.0001 mol.

Total volume = 0.004 l + 10 ml

= 0.004 + 0.001 = 0.005 l

Moles of CuSO4 = 0.0001 mol

Molarity = 0.0001 / 0.005 = 0.02 M

Thus, we concluded that the molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

One of the three primary methods for the transfer of heat energy is conduction. Radiation and convection are the other two methods through which heat is transferred. Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide.

In liquids and solids where particles are more closely spaced, conduction happens more easily than in gases, wherein particles are more widely spaced. When there is a significant temperature differential between both the substances that are in contact, the rate of energy transfer through conduction is increased.  You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

Therefore, the correct option is option A.

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