Calcium carbonate decomposes if heated to form calcium oxide and carbon dioxide. If 24.5 g of calcium carbonate decompose how many moles of calcium carbonate reacted?

Explanation:

303k -273k=30°c because 0°c is 273K

Answer:

30 degrees Celsius

Explanation:

303 - 273 = 30.

Answer:

12000m & 12km

Explanation:

covert 20mins into seconds.

20 x 60= 1200seconds

distance = speed x time

distance = 10 x 1200

distance = 12000m

1km=1000m

12000/1000= 12km

hope that helps :)

Diffraction occurs whenever a portion of a wavefront is obstructed by some opaque object.

Answer:

\(V_{base}=43.5cm^3\)

Explanation:

Hello there!

In this case, given the neutralization chemical reaction of barium sulfate and nitric acid, it is possible to evidence the 1:2 mole ratio between them; thus, at the equivalence point we have:

\(2n_{base}=n_{acid}\)

Which in terms of molarities and volumes is:

\(2M_{base}V_{base}=M_{acid}V_{acid}\)

In such a way, by solving for the volume of base, we proceed as follows:

\(V_{base}=\frac{M_{acid}V_{acid}}{2M_{base}} \\\\V_{base}=\frac{45cm^3*0.29mol*dm^{-3}}{2*0.15mol*dm^{-3}} \\\\V_{base}=43.5cm^3\)

Best regards!

Polymer melting point transitions are broader than low molecular compounds primarily due to their molecular structure and size. Polymers consist of long, repeating chains of monomers, which creates a more complex and varied molecular arrangement.

This leads to a broader distribution of melting points because the polymer chains have varying degrees of entanglement and intermolecular forces. In contrast, low molecular compounds have smaller and simpler structures, which results in a more uniform distribution of melting points. This uniformity is due to the more consistent intermolecular forces and the absence of entanglements, allowing these compounds to have a sharper melting point transition. Furthermore, the presence of impurities or additives in polymers can also contribute to the broadening of the melting point transition. These impurities can disrupt the regularity of the polymer structure, resulting in a wider range of melting points.

In summary, the broader melting point transitions of polymers compared to low molecular compounds are a result of their complex molecular structure, varying degrees of entanglement, intermolecular forces, and the potential presence of impurities or additives.

To learn more about Molecular Arrangement :

https://brainly.com/question/28946477

#SPJ11

Answer:

luminescence

Explanation:

Hope it helps!

In order to answer the question first we must write the atomic number of each element:

Zirconium (Zr): 40

Cadmium (Cd): 48

Iridium (Ir): 77

Iron (Fe): 26

Then, we have to complete the distribution of electrons in each orbital for each atom:

The first 4 levels have the following distribution:

Level1: 1s

Number of electrones: 2

Level 2: 2s, 2p

Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).

Level3: 3s, 3p, 3d

Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)

Level 4: 4s, 4p, 4d, 4f

Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)

The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.

The order is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...

Now, knowing the atomic number we can answer the question:

For Zirconium (total 40 electrones):

2 electrones are predicted in the 4d orbital

For Cadmium (total 48 electrones):

10 electrones are predicted in the 4d orbital

For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.

For iron (total 26 electrones)

Iron has no electrones in the 4d orbitals

Answer:

the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.

Answer:

Blanket underneath the furniture may reduce the kinetic friction

Explanation:

When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.

By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.

Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.

(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)

Stay positive and Take care,

A fellow mate,

Cheers !

A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

To know more about  electron configuration  visit:-

https://brainly.com/question/29757010

#SPJ4

Answer:

the third one

Explanation:

The total mass of the solution is   0.100025 Kg. Hence, the concentration in parts per million is 246.93 ppm.

Parts per million or ppm is  a term used to express the concentration of a solution. The concentration of the a solution can be expressed in terms of the mass , volume or number of moles of the solute in the solution.

ppm of a solution = weight of solute in kg/weight of solution in kg ×10⁶.

Given , mass of solute lead nitrate = 0.025 g

mass of solvent = 100 g.

total mass of the solution = 100 + 0.025 = 100.025.g

mass in kg =   0.100025 Kg.

mass in kg of solute = 0.000025 Kg

ppm of solution  = 0.000025 kg/   0.100025 Kg ×10⁶. = 249.9 ppm.

Therefore, the concentration of the solution in ppm is 249.9 ppm.

Find more on ppm :

https://brainly.com/question/16727593

#SPJ1

Answer:

A. the earth’s tilt toward the sun

Explanation:

The most important factor in the changing of the seasons on the earth is the earth's tilt towards the sun.

This causes the differences in the amount of insolation which is incident on the earth surface. Throughout the year, as the earth continues to spin, it receives different amount of solar radiation all year round.

The sun is always overhead around the equator. Such regions of the world receives direct insolation and are mostly constrained to a wet and dry season.

Areas above the equator have the sun at an angle. The diffused sunlight present distinct seasons all year round.

The probability of observing at least one ICU admission, among the next six patients hospitalized for COVID-19 is 0.26491. Option A is correct.

The probability of not observing any ICU admission among the next six patients hospitalized for COVID-19:

Probability of not observing ICU admission = 1 - Probability of observing ICU admission

= 1 - 0.05

= 0.95

Probability of no ICU admission among the next six patients hospitalized for COVID-19:

Probability of no ICU admission in one trial = 0.95

Probability of no ICU admission in six trials (patients)

= 0.95 × 0.95 × 0.95 × 0.95 × 0.95 × 0.95

= 0.73509

Now, we can calculate the probability of observing at least one ICU admission among the next six patients hospitalized for COVID-19:

Probability of at least one ICU admission= 1 - Probability of no ICU admission

= 1 - 0.73509

= 0.26491

Therefore, the answer is A.

Learn more about patients -

brainly.com/question/31288405

#SPJ11

The glass transition temperature of a polymer is the temperature at which the polymer transitions from a hard and brittle glassy state to a softer and more flexible rubbery state.

It is a characteristic property of amorphous polymers and is dependent on their molecular weight, degree of branching, and chain stiffness.

The melting temperature of a polymer is the temperature at which its crystalline regions melt, and the polymer transitions from a solid to a liquid.

The melting temperature is affected by the size and regularity of the crystalline regions in the polymer, as well as the strength of intermolecular forces.

The glass transition temperature and melting temperature of a polymer are related to the structure of the polymer. Polymers with more rigid and bulky side groups tend to have higher glass transition temperatures because they are less able to pack closely and form a crystalline structure.

On the other hand, polymers with longer and more linear chains tend to have higher melting temperatures because they can pack more closely and form more regular crystalline structures.

To know more about amorphous polymers click on below link:

https://brainly.com/question/29577588#

#SPJ11

Answer:

abt 2 moles

Explanation:

1 mole of carbon atoms per mole of carbon dioxide = 6.02 x 1023 carbon atoms. 2 mole of oxygen atoms per mole of oxygen atoms = 2 x 6.02 x 1023 oxygen atoms.

Answer:

3.33 atm

Explanation:

P1/T1 = P2/T2

5 atm/ 300 K = P2 /200K

P2 = 5atm*200 K/300 K

P2 = 3.33 atm

molar solubility of PbBr2 in 0. 500 M KBr solution is 4S3 = 6.60 x 10–6 . PbBr2 ionizes as Pb2+ + 2Br-, molar solubility of PbBr2 in a 0. 500 M Pb(NO3)2 solution is 0.0181 moles/lit..

If molar solubility of PbBr2 is “S”, then solubility of Pb2+ is also “S” but that of Br- would be “2S”. Ksp = [Pb2+] [Br-]2 = (S) (2S)2 = 4S3 = 6.60 x 10–6 4S3 = 6.6 x 10–6,this gives Solubility S = 1.181 x 10–2 = 0.0181 moles/lit. solid's solubility (usually referred to as its molar solubility) is expressed as the concentration of the "dissolved solid" in a saturated solution. This would simply be the concentration of Ag+ or Cl- in the saturated solution for a simple 1:1 solid like AgCl. The other way to express solubility is through molar solubility, which is defined below. It is the number of moles of solute in one litre of saturated solution and is abbreviated with a lower case's'. It is expressed in moles per litre, also known as molarity.

learn more about molar solubility here:

https://brainly.com/question/28170449

#SPJ4

Quantum mechanics is the study of atoms and incredibly tiny particles that are even smaller.

In quantum mechanics, another branch of physics, atomic and subatomic particles are investigated. The primary field of science that deals with the study of atoms and molecules is chemistry. By utilizing their knowledge of atoms, chemists create molecules that resemble drugs. A distinction is established between atomic physics, which studies the atom as a system made up of a nucleus and electrons, and nuclear physics, which explores nuclear reactions and special properties of atomic nuclei. Three subatomic particles make up matter: protons, neutrons, and electrons. The only subatomic particles that have electrical charges are protons and electrons, with protons having a positive charge and electrons having a negative charge.

Learn more about quantum mechanics here:

https://brainly.com/question/11855107

#SPJ4

First, we write the reaction and balance it:

HNO2 (aq) + NH3 (aq) = NH4+ + NO2- (Balanced)

Data:

50 mL of 0.2 M HNO2

50 mL of 0.2 M NH3

In total, we have 100 mL, therefore, this solution between HNO2 and NH3 will be diluted in half. I mean: The concentration of HNO2 and NH3 will be 0.10 M

HNO2 (aq) + NH3 (aq) = NH4+ + NO2-

Initial 0.10 M 0.10 M 0 0

reacts -x -x +x +x

Equilibrium 0.10-x 0.10-x +x +x

Now, we write Kc:

Values of x:

For 1) x = 0.0999

For 2)x = 0.1001

We choose number 1) x = 0.0999

Number 2 gives us a value higher than the initial values of concentration

Therefore, concentration in equilibrium of NH3 = 0.10-x =0.10 - 0.0999 = 0.00010M

Answer: A. 0.00010M

The earliest rocks are Cambrian, followed by Ordovician, Devonian, and Permian rocks.

A rock is a naturally occurring substance made up of crystalline crystals consisting of various minerals that have fused together to form a solid mass.

It's possible or unlikely that the minerals that make up rock's composition developed at the same time.

On the earth's surface, igneous rocks—which are volcanic rocks—are widespread. They are created when molten material solidifies.

One of these is granite, which is created when magma solidifies underground.

Sedimentary rocks are those that are created from the eroded pieces of other rocks. Even the carcasses of plants or animals are used to create them.

Thus, the oldest rocks are therefore those that are Cambrian, followed by Ordovician, Devonian, and Permian in age.

For more details regarding rocks, visit:

https://brainly.com/question/19930528

#SPJ1

Answer:

hope this is help helpful

Explanation:

natural gas are considered nonrenewable because they can not be replenished in a short period of time.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

We have

\(k = \frac{1}{2} \times 14 \times {7}^{2} \\ = 7 \times49 \\ = 343 \: \: \: \: \: \)

We have the final answer as

Hope this helps you

The number of miles one can drive if a car gets 29.50 miles per gallon with 12.00 gallons of gas would be

The car in question can cover a distance of 29.50 miles per gallon of gas and there is a total of 12.00 gallons of gas available. If one gallon can cover a distance of 29.50 miles, then the distance that the 12 gallons can cover can be calculated using dimensional analysis as follows:

1 gallon = 29.50 miles

12 gallons = 28.50 x 12

                 = 342 miles

In other words, if one gallon can cover a distance of 29.50 miles, then the 12.00 gallons of gas will cover a total distance of 342 miles.

More on dimensional analysis problems can be found here: https://brainly.com/question/19284803

#SPJ1

Answer:

Nuclear processes, including fusion, fission, and radioactive decays of unstable nuclei, involve changes in nuclear binding energies.

Explanation:

mark me brainliest please

There are 3 important numbers.All digits in significant figures that are not zeros.

To learn more about significant figures refer

https://brainly.com/question/24630099

#SPJ1

Molarity of a KCL solution made by dissolving 28.4 g of KCL in a total volume of 500 ml is calculated as 0.7619 M KCL.

Mole is a unit of measurement used for chemical substance. Molarity is also known as the molar concentration of solution. It is the technique of calculating the amount of substance that a particular chemical solution contains.

As we know that the molar mass of KCl is 74.55 g/mol.

Hence, molarity = 28.4 g * 1 mol KCl /74.55 g * 1/500 mL * 1000 mL/1 L

Now, molarity = 0.7619 M KCl.

To know more about molarity, refer

https://brainly.com/question/26873446

#SPJ4

The matter is composed of a large number of extremely small indivisible particles called atoms. They can neither be created nor destroyed.

A particle which is smaller in size than an atom is defined as the subatomic particles. An atom consists of three subatomic particles. They are electrons, protons and neutrons.

The positively charged particles present in an atom is called protons whereas the negatively charged particles are electrons. The neutrons are chargeless particles.

In our daily life three balls of different colours represents a model of an atom. Here one colour denotes the protons, other two balls denotes electrons and neutrons.

A model of atom with 3 protons, 3 electrons and 4 neutrons can be represented below. It is the 'Li' atom which contains 3 protons and 4 neutrons.

Thus balls depicts a model of atom and Li atom model is shown here.

To know more about atoms, visit;

https://brainly.com/question/14214017

#SPJ1

Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells.
Negative health consequences of a high amount of free radicals in the system include, Oxidative Stress, Inflammation, Cellular Damage.
Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals.


Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells. They are formed as natural byproducts of various biological processes in the body, such as metabolism, immune response, and environmental factors like pollution, radiation, or smoking. Free radicals are unstable and seek to stabilize themselves by oxidizing other molecules in the body, leading to a chain reaction of damage to cells, proteins, and DNA.

Negative health consequences of a high amount of free radicals in the system include:

Oxidative Stress: Excessive free radicals can cause oxidative stress, which is an imbalance between the production of free radicals and the body's antioxidant defenses. This can result in damage to cellular components and contribute to the development of chronic diseases, including cancer, cardiovascular diseases, neurodegenerative disorders, and aging.

Inflammation: Free radicals can trigger and perpetuate inflammation in the body. Chronic inflammation is associated with various health conditions, including arthritis, asthma, diabetes, and autoimmune disorders.

Cellular Damage: Free radicals can damage cell membranes, proteins, and DNA, leading to mutations, cell dysfunction, and impaired cellular processes. This can disrupt normal cell function and contribute to the development of diseases.

Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals. They help inhibit or reduce the oxidation of other molecules by donating an electron to stabilize the free radicals without becoming free radicals themselves. Antioxidants can be naturally occurring compounds found in fruits, vegetables, whole grains, nuts, and seeds, as well as synthetic substances. Some common antioxidants include vitamins C and E, beta-carotene, selenium, and various phytochemicals. Consuming a diet rich in antioxidants or supplementing with antioxidants can help protect against oxidative stress and mitigate the negative health consequences associated with high levels of free radicals.


To know more about Free radicals, click here, https://brainly.com/question/30045386

#SPJ11

Answer:

C. Al and O2

Explanation:

The reactants are the elements or compounds that is becoming the result

So Al and O2

Hope this helps!

Acetic acid is a clear and colorless liquid that is used in a variety of applications, both industrially and domestically. Its main purpose is as a chemical reagent in the production of various substances, including plastics, textiles, and pharmaceuticals.

Acetic acid is also used as a solvent, meaning that it can dissolve other substances and be used to extract desired chemicals from them.

One of the most common applications of acetic acid is in the food industry. It is used as a preservative in various foods, such as pickles and condiments, to prevent bacterial growth and prolong shelf life. It is also an important ingredient in the production of vinegar, which is widely used as a flavoring and condiment in cooking.

Another important use of acetic acid is in the manufacture of vinyl acetate, which is used in the production of many common household items such as adhesives, paints, and coatings. Acetic acid is also used as a cleaning agent, due to its ability to dissolve dirt and grime.

In conclusion, acetic acid is a versatile chemical that has numerous applications in both industry and everyday life. Its ability to dissolve other substances and act as a preservative makes it a valuable ingredient in a wide range of products, from pharmaceuticals to foodstuffs and household cleaners.

to know more about acetic acid click this link

brainly.in/question/8384

#SPJ11