What kind of reaction happens when two compounds switch elements? Apex

Answer:

5 on k-12 that's the answer

Explanation:

Explanation:

nah so easy

it's a direction of electron spinning in the shell

+½ means electron spinning in clockwise direction

-½ means electron spinning in anticlockwise direction

In this question we have two dilutions occurring, for both cases we will use the dilution formula, which says that the initial concentration and volume of a solution must be equal to the final concentration and volume of the solution, we can better understand that formula presenting it to the question:

M1 * V1 = M2 * V2

where:

M1 = initial molar concentration

V1 = initial volume in liters

M2 = final molar concentration

V2 = final volume in liters

Now let's see what happens in our first dilution:

1.60 M * 0.075 L = M2 * 0.278 L

M2 = 0.43 M, this is the first final concentration

Now we have a solution with 0.43M and 278 mL

In the question we take 139 mL of the 0.43 M solution and add 193 mL, therefore having 332 mL as final volume, let's use the formula again

0.43 M * 0.139 L = M2 * 0.332 L

M2 = 0.180 M as final concentration

Answer:

Copper hydroxide is the correct answer.

Explanation:

Hope this helped Mark BRAINLIEST!!!

86.5% is the percent yield of iron.

To calculate the percent yield of iron, we need to first determine the theoretical yield of iron, which is the amount of iron that would be produced if the reaction went to completion. We can use stoichiometry to determine this:

1 mole of Fe2O3 reacts with 2 moles of Al to produce 2 moles of Fe.
0.450 moles of Fe2O3 would require 0.900 moles of Al (since there is a 2:1 mole ratio between Al and Fe2O3).
0.900 moles of Al would produce 2 x 0.450 = 0.900 moles of Fe.

The molar mass of Fe is 55.85 g/mol, so the theoretical yield of Fe would be:

0.900 moles x 55.85 g/mol = 50.27 g

Since the actual yield of Fe is given as 43.6 g, we can calculate the percent yield as:

(actual yield/theoretical yield) x 100%
= (43.6 g/50.27 g) x 100%
= 86.5%

Therefore, the answer is (a) 86.5%.

Learn more about mass of Fe

brainly.com/question/30636962

#SPJ11

Dibasic bases split into two OH- ions.

What is dibasic acid?
A dibasic acid is one that, when reacting with a base, can release two positively charged hydrogen ions, as well as protons. Diprotic acid is a more recent name for this kind of acid. Normally, an acid and a base will react to create salt and water. When the negative charges hydroxide ion from the base reacts with the positively charged hydrogen ion from of the acid, the result is water: H+ + OH- H2O. Two types of salt can be created from the two hydrogen atoms in a dibasic acid molecule, one of which is an acid salt with a hydrogen atom. One of the most well-known and frequently used acids is sulfuric acid, which is a good illustration of a dibasic acid.

Hence, the answer is Sr(OH)2 and Ca(OH)2.
To learn more about dibasic acid follow the link:
https://brainly.com/question/24159433
#SPJ4

Answer:

→ Fractional distillation

Explanation:

• This is because butane and propane have different boiling points.

• Butane has greater boiling point than propane.

\(.\)

Answer:

How do you separate propane from butane?

Using fractionation, which involves temperature.

They have different boiling points, so you can boil off the propane whilst the butane remains as a liquid.

This would occur anywhere between -0.4°C and -42°C, the temperature range where propane boils and butane does not.

This further fractionation can be achieved with Depropaniser, Debutaniser and Deisobutaniser fractionators.

Explanation:

please mark me as the brainliest

have a beautiful day ahead

▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦▦

Answer:

D

Explanation:

Answer:

Cr(NO3)3 (aq) +K3PO4 (s)

Explanation:

An atom's valence shell's 1s and3p orbital(s) hybridize to generate a set of sp3 hybrid orbitals. The geometry and energy of these hybrid orbitals are similar.

What does the term "valence shell" refer to?

The valence shell of an atom refers to its outermost orbital or shell. These electrons participate in forming bonds with other atoms. It might be either totally or partially filled.

What are hybrid orbitals?

A model that combines the atomic orbitals of a single atom to create a new set of orbitals with new geometries The geometry is suitable for forming bonds in the directions suggested by the VSEPR model. It can produce hybrid orbitals. Geometries that are very similar to those observed in true molecules are predicted by the VSEPR model. When an atom is surrounded by four groups of electrons, this kind of hybridization is necessary. For instance, the valence-shell s orbital of carbon forms four single bonds with three valence-shell p orbitals.

Hence,1s and3p orbital(s) hybridize to generate a set of sp3 hybrid orbitals with same geometry.

To know more about Valence shell,visit:

https://brainly.com/question/12166861

#SPJ1

Truly loving someone means caring for them in the ways that they need to be cared for, with no strings attached. (That's why they call it unconditional love.)

An example of supplying activation energy to a chemical reaction is striking a match to make it burn. A match's combustion is a highly exothermic energy process.

Energy-releasing processes are said to be positive since the chemical reactions end products are in a more stable and advantageous condition afterward. It's because the reactions follow a predetermined course, and that course necessitates the use of energy (known as activation energy) in order to create an activated complex chemical reaction, which will ultimately result in the synthesis of the products. This implies that in order to begin, the products must absorb some energy (the activation energy).

Learn more about  chemical reaction here

https://brainly.com/question/22817140

#SPJ4

Answer:

What do you want answered?

Explanation:

John Dalton created the very first atomic theory. Dalton was an English school teacher who performed many experiments on atoms.

According to Dalton's atomic theory, all matter is composed of small particles called atoms. Dalton provided some postulates of this theory. Some of the important ones are:

All matter is made of very tiny particles called atoms, which participate in chemical reactions. Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.

Atoms of a given element are identical in mass and chemical properties.

Atoms of different elements have different masses and chemical properties.

Atoms combine in the ratio of small whole numbers to form compounds.

The relative number and kinds of atoms are constant in a given compound.

The postulate of Dalton's atomic theory, i.e., "Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction." is the result of the law of conservation of mass.

To know more about Dalton's atomic theory here

https://brainly.com/question/1403872

#SPJ4

In 310 g of magnesium ions (Mg²⁺), there are approximately 7.69 × 10²⁴ magnesium ions. This calculation involves converting the mass of magnesium ions to moles.

To determine the number of ions in 310 g of magnesium ions (Mg²⁺), we need to convert the mass of magnesium ions to the number of moles and then use Avogadro's number to calculate the number of ions.

The molar mass of magnesium (Mg) is approximately 24.31 g/mol.

Number of moles = Mass / Molar mass

              = 310 g / 24.31 g/mol

              = 12.75 mol (rounded to two decimal places)

There is one magnesium ion in one mole of magnesium ions (Mg²⁺).

Number of magnesium ions

= Number of moles × Avogadro's number × Number of ions per mole

= 12.75 mol × 6.022 × 10²³ ions/mol × 1 ion

≈ 7.69 × 10²⁴ magnesium ions

Therefore, there are approximately 7.69 × 10²⁴ magnesium ions in 310 g of magnesium ions (Mg²⁺).

Learn more about moles here:

https://brainly.com/question/29367909

#SPJ11

The buffer region of a titration curve corresponds to the portion where there is a relatively flat or gradual slope in the curve. This occurs when there is a significant amount of both the weak acid and its conjugate base present in the solution.

Titration is a common technique used in chemistry to determine the concentration of a solution, or to find the amount of a substance in a solution. It involves adding a solution of known concentration (the titrant) to a solution of unknown concentration (the analyte) until the reaction between the two is complete. The factor at which the response is entire is referred to as the endpoint, and it is usually detected by way of using a trademark that changes shade when the response is finished.

Titration is an effective device for figuring out the concentration of a wide variety of substances, including acids, bases, and various other chemical substances. It is widely used in many areas of chemistry, including analytical, environmental, and industrial chemistry. Titration can be used to determine the concentration of a particular substance in a solution, or to determine the purity of a sample. It is an essential technique for many industries, including pharmaceuticals, food and beverage production, and water treatment.

To learn more about Titration visit here:

brainly.com/question/2728613

#SPJ4

Answer:

i dont know

Explanation:

Answer:

Silicon conducts electricity as well as copper does.

Explanation:

you didn't gave any statements to choose the answer from.

but otherwise, what all I my knowledge says that Silicon conducts electricity as well as copper does.

Answer: False

Explanation:

An acid is defined as the substance which looses hydrogen ion or hydronium ions when dissolved in water.

A base is defined as the substance which looses hydroxide ions when dissolved in water.

If the solution has higher hydronium ion concentration as compared to the hydroxide ion concentration, then the pH will be low and the solution will be acidic.

If the solution has low hydronium ion concentration as compared to the hydroxide ion concentration then the pH will be high and the solution will be basic.

Answer:

n = 2 moles (1 sig-fig)

Explanation:

Using the Ideal Gas Law equation (PV = nRT), solve for n (= moles) and substitute data for ...

pressure = P(atm) = 100atm

volume =V(liters) = 50L

gas constant = R = 0.08206L·atm/mol·K

temperature = T(Kelvin) = °C + 273 = (35 + 273)K = 308K

PV = nRT => n = PV/RT = (100atm)(50L)/(0.08206L·atm/mol·K)(308K)

∴ n(moles) = 1.978moles ≅ 2 moles gas (1 sig-fig) per volume data (= 50L) that has only 1 sig-fig. (Rule => for multiplication & division computations round final answer to the measured data having the least number of sig-figs).

Moles are the ratio of the mass and the molar mass of the substance. In a 50.0 L cylinder, 2 moles of gas are present at 100 atm and 35 degrees celsius.

An ideal gas equation states the relationship between the moles of the substance, temperature, pressure, and volume. The ideal gas equation is given as,

\(\rm PV = nRT\)

Given,

The pressure of the gas (P) = 100.0 atm

Volume of the gas (V) = 50.0 L

Temperature (T) = 308 K

Gas constant (R) =  0.08206 L atm/mol K

Substituting values in equation moles (n) is calculated as:

\(\begin{aligned} \rm n&= \rm \dfrac{PV}{RT}\\\\&= \dfrac{100 \times 50}{0.08206 \times 308}\\\\&= 1.978\end{aligned}\)

Therefore, 1.978 or 2 moles of gas are present.

Learn more about moles here:

https://brainly.com/question/20343774

Matthew takes a little longer to hear the train whistle on a cold winter day than he does on a warm summer day.

Temperature has an effect on sound speed, with higher temperatures resulting in faster sound speed. The speed of sound is approximately 347 m/s at 38° C, and 331 m/s at -4° C.

To calculate the time it takes for Matthew to hear a train whistle, use the formula:

time = distance / speed

On a warm summer day at 38° C:

time = 900 m / 347 m/s = 2.59 s

On a cold day at -4° C:

time = 900 m / 331 m/s = 2.72 s

Therefore, hearing the train whistle on a cold winter day takes significantly longer than on a warm summer day.

Find out more on time here: https://brainly.com/question/26046491

#SPJ1

Lithium carbonate contains 18.78% mass percent lithium. It should be noted that a compound's overall percentage composition of all its constituent elements is always 100%.

Only depression related to bipolar illness is authorized for lithium use. When combined with an antidepressant, it may also be successful in alleviating other types of depression, although further research is required. Discuss the possibility of adding lithium with your doctor if you are on an antidepressant but are still experiencing symptoms.

This substance is employed for the treatment of mania and depression (bipolar disorder). By bringing certain natural compounds back into equilibrium in the brain, it helps to calm mood and lessen excessive behavior.

To know more about Lithium Carbonate visit:

https://brainly.com/question/15127937

#SPJ1

Answer:

A substrate is a molecule acted upon by an enzyme. A substrate is placed into the active site of the enzyme, or the area that permits weak bonds to be formed between the two molecules

Explanation:

Hope it helps:)

1) Write the chemical equation.

2) List the known and unknown quantities.

Sample: H2SO4

Volume: 33.98 mL.

Concentration: unknown

Titrant: LiOH

Volume: 18.19 mL = 0.01819

Concentration: 1.35 M

3) Find moles of LiOH

3.1- Set the equation

3.2- Plug in the values

The number of moles of LiOH in the reaction is 0.0246.

4) Find moles of H2SO4

The molar ratio between H2SO4 and LiOH is 1 mol H2SO4: 2 mol LiOH.

5) Molarity of H2SO4

Sample: H2SO4

Moles: 0.01228

Volume: 33.98 mL.

5.1- Convert mL to L.

1 L = 1000 mL

5.2- Set the equation to find molarity.

The molarity of the sample is 0.3614 M H2SO4.

Answer:

A

Explanation:

The formula for mechanical energy is mechanical energy = kinetic energy + potential energy.

Identify the unidentified substance using densities of a known substances. Unknown material density Using mass and volume data, identify an unidentified substance and calculate it density: P = 8.6 g/cm3.

Since water served as the foundation for creating the metric system of measurement, density is defined as mass divided in volume (=m/v), meaning that one cubic centimetre (1cm3) if water weighs one gramme (1g). As a result, the density of water is simple to remember: 1g/1cm3 = 1 g/cm3.

Pour water into the a graduated cylinder, measure the volume, submerge the object, and measure the volume again. Its volume of a object is the distinction between both volume measurements. To determine the object's density, just divide its mass by the volume.

To know more about mass visit:

https://brainly.com/question/15959704

#SPJ1

Among the given gases, the gas that shows the greatest deviation from ideal behavior at 25 degrees Celsius and 1 atm is likely to be H2 (hydrogen).

1. Size and shape of molecules: Hydrogen gas (H2) consists of diatomic molecules that are very small in size. The size of the hydrogen molecule is relatively larger compared to other gases such as CH4 (methane), SO2 (sulfur dioxide), and O2 (oxygen). The small size of hydrogen molecules leads to a higher probability of molecular interactions and deviations from ideal behavior.

2. Intermolecular forces: Hydrogen gas has relatively weak intermolecular forces compared to other gases. Although it exhibits London dispersion forces, these forces are not as strong as the dipole-dipole interactions in molecules like SO2 and CH4 or the formation of double bonds in O2. The weaker intermolecular forces in hydrogen contribute to larger deviations from ideal behavior.

Based on the size and shape of molecules as well as the strength of intermolecular forces, hydrogen gas (H2) is expected to show the greatest deviation from ideal behavior among the given gases at 25 degrees Celsius and 1 atm.

To know more about deviation visit:  

https://brainly.com/question/13208028

#SPJ11

Answer:

A

Explanation:

The elephant has more mass, so more inertia, and it takes more forece to change the elephant motion.

The unique, three-dimensional structure of a protein is determined largely by hydrogen bonds (c)

The complete questions should have as follow :
The unique, three-dimensional structure of a protein is determined largely by …
a. Covalent bonds
b. Oxygen bonds
c. Hydrogen bonds
d. Ionic bonds

Proteins are made of amino acids which fold into unique three dimensional shapes. The unique, three-dimensional structure of a protein is determined by its amino acid sequence. Interactions between amino acids are influenced by the chemical bonds. 
Each of amino acid has a unique side chain. The chemistry properties of amino acid side chains has a big influence on protein structure because side chain can bond with one another to hold a protein in certain shape.

Thus, the majority of bonds formed are noncovalent. Folded protein are stabilized by thousands of noncovalent bonds between amino acids.
All interactions, strong or weak, determine the final three dimensional shape of protein. Because side chain interaction, the location and the sequence of amino acid in particular protein guides where the bends and folds occur in protein.

Learn more about protein structure at :

https://brainly.com/question/14652022
#SPJ4

The unique, three-dimensional structure of a protein molecule is determined largely by hydrogen bonds. The correct answer is the second option.

A hydrogen bond is a type of chemical bond that occurs between a hydrogen atom and another atom with high electronegativities, such as oxygen, nitrogen, or fluorine. It is a weak bond that forms when the positive charge of the hydrogen atom is attracted to the negative charge of the other atom.

Hydrogen bonds are important in many biological processes, such as the folding and stability of proteins and the base-pairing of DNA. They are also responsible for the unique properties of water, such as its high boiling point and surface tension.

Learn more about hydrogen bond at https://brainly.com/question/1420470

#SPJ4

Approximately 148.59 grams of carbon dioxide could be made.The remaining reactant, since \(O_2\)is the limiting reactant, all the CO will not be completely consumed. There would be no CO leftover as it is completely consumed in the reaction.

To determine the grams of carbon dioxide produced, we need to identify the limiting reactant first. The balanced chemical equation for the reaction is:

2 CO +\(O_2\) -> 2 \(CO_2\)

To find the limiting reactant, we compare the number of moles of each reactant and determine which one is present in a lower amount relative to the stoichiometry of the reaction.

First, we convert the given volumes of gases to moles using the ideal gas law equation:

n = PV / RT

where:

n = number of moles

P = pressure

V = volume

R = ideal gas constant

T = temperature

Assuming the reaction takes place at standard temperature and pressure (STP), which is 273.15 K and 1 atm, we can use the values to convert the volumes to moles:

For carbon monoxide (CO):

n(CO) = (75.3 L) / (22.414 L/mol) = 3.36 moles

For oxygen (O2):

n(O2) = (38.0 L) / (22.414 L/mol) = 1.69 moles

According to the balanced equation, the stoichiometry of the reaction is 2:1 for CO to \(O_2\)This means that for every 2 moles of CO, we need 1 mole of \(O_2\). In this case, the ratio of moles is 3.36:1.69, which shows an excess of CO.

To find the limiting reactant, we compare the mole ratio to the stoichiometry ratio. Since there is a surplus of CO, it is the excess reactant, and\(O_2\)is the limiting reactant.

To determine the amount of carbon dioxide produced, we use the stoichiometry of the reaction. From the balanced equation, we know that for every 2 moles of CO, 2 moles of CO2 are produced.

Since\(O_2\) is the limiting reactant, we use its moles to calculate the moles of \(Co_2\)produced:

n(\(CO_2\)) = 2 * n(\(O_2\)) = 2 * 1.69 moles = 3.38 moles

Finally, we convert the moles of\(CO_2\) to grams using the molar mass of carbon dioxide, which is 44.01 g/mol:

mass(\(CO_2\)) = n(\(CO_2\)) * molar mass(\(CO_2\) = 3.38 moles * 44.01 g/mol ≈ 148.59 grams

Therefore, approximately 148.59 grams of carbon dioxide could be made.

As for the remaining reactant, since \(O_2\)s the limiting reactant, all the CO will not be completely consumed. To determine the amount of CO leftover, we subtract the moles of CO used from the initial moles of CO:

Remaining moles of CO = Initial moles of CO - Moles of CO used

Remaining moles of CO = 3.36 moles - 2 * 1.69 moles ≈ 0 moles

Thus, there would be no CO leftover as it is completely consumed in the reaction.

Know more about   carbon dioxide   here:

https://brainly.com/question/30355437

#SPJ11

The statement "Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the resulting indentation or its effect" is true because the majority of the hardness tests depend on measuring the resulting indentation or the effect of the hard object on the test specimen.

Hardness testing is a method of measuring how well a material can resist permanent indentation or scratch by another material. This method is used to evaluate the toughness of materials like metals, plastics, ceramics, and polymers.

A variety of methods is available for testing hardness, which is divided into two types based on the method of testing; Dynamic Hardness Testing and Static Hardness Testing..

The sample of Dynamic Hardness Testing is exposed to a sudden load and the indentations left are analyzed. In Static Hardness Testing, an object is applied to the sample and the pressure required to deform the material is measured.

The Rockwell test, the Brinell test, the Vickers test, and the Knoop test are the most widely used hardness tests. The Brinell hardness test, which is based on the principle of measuring the diameter of the impression left on the specimen when an object is pressed into it, is the most common method of testing industrial materials.

Learn more about test specimen https://brainly.com/question/31491299

#SPJ11