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The amount, in grams, of calcium that are in 3.01 x [tex]10^{22[/tex] atoms of calcium would be 1.9992 grams.

According to the rules, 1 mole of any substance contains Avogadro's number, which is 6.022 x [tex]10^{23[/tex] atoms or molecules.

Now, we have a substance with  3.01 x [tex]10^{22[/tex] atoms of calcium.

If, 1 mole = 6.022 x [tex]10^{23[/tex] atoms

Then, 3.01 x [tex]10^{22[/tex] atoms = 3.01 x [tex]10^{22[/tex]/ 6.022 x [tex]10^{23[/tex]

                                       = 3.01/60.22

                                       = 0.04998 moles

Recall that:

Mole = mass/molar mass

The molar mass of the calcium atom is 40 g/mol.

Thus, the mass of 0.04998 mole of calcium = mole x molar mass

                                                                          = 0.04998 x 40

                                                                           = 1.9992 grams

In other words,  3.01 x [tex]10^{22[/tex] atoms of calcium would weigh 1.9992 grams of ca.

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The type of reaction for each chemical equation is as follows:

1. Displacement reaction

2. Combustion reaction

3. Double displacement reaction

4. Decomposition reaction

5. Synthesis reaction.

The different types of chemical reactions include:

Thus, the chemical equations and their respective reactions are as follows:

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Answer:D. an increase in temperature and an increase in volume

Explanation: Heat is a reaction, so if you increase the temperature of the system, you increase the amount of reactants. Thus, higher temperature would push equilibrium toward the products, the right. The products, however, have 4 molecules in comparison to the reactants’ 2, and so you have to increase the volume to push equilibrium that way as well.

The molecular formula is (CH2O)5 when the scale factor is 5 and the empirical formula is CH2O.

Considering the question given above, the following data were obtained:

Empirical formula is CH₂O

Molar mass of compound = 150 g/mol

Scaling factor (n) =?

Empirical formula × n = molar mass

[CH₂O]n = 150

[12 + (2×1) + 16]n = 150

[12 + 2 + 16]n = 150

30n = 150

Divide both sides by 30

n = 5

Therefore, the scaling factor is 5

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Answer:

C 5 H 10 O 5

Explanation:

Answer:

Nickel

Explanation:

count the number of electrons in the 4p and 4d, total 8. After calcium count to 8 spots and you reach nickel. You must fill p orbital before d ortibal for stability.

If actual yield and theoretical yield are same then the percent yield will be 100%. Generally, the actual yield is lower than the theoretical yield. The percent yield of  0₂ is 93%.

Percent yield is the percent ratio of actual yield to the theoretical yield.

Mathematically,

Percent yield= actual yield of a product÷ theoretical yield of the product

The balanced reaction is

2Al₂O₃ →4A1+30₂

moles of Al₂O₃=given mass÷ molar mass

                        =96.3 g ÷100g/mol

                        =0.96moles

From 2 mole of Al₂O₃, 3 moles of 0₂ is produced

From 0.96moles of  Al₂O₃=(3÷2)×0.96moles of 0₂

                                          =1.44moles of 0₂

mass of  0₂=moles of  0₂×Molar mass of moles of 0₂

mass of  0₂=1.44×32

                  =46.08g

Percent yield=  43.2 g÷46.08g=93%

Therefore the percent yield of  0₂  is 93%.

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Answer: a

Explanation:

Acacia ant and acacias animals are an example of coevolution

Coevolution is the reciprocal evolutionary change in a set of interacting population over time resulting from the interaction between those population and an example of coevolution that is not characteristics of an arm race but one which provides a mutual benefit to both a plant species and insect is that of the acacia ant and acacia plant and many cases of coevolution can be found between plants and insects

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The new volume of the balloon will be 484.43 L.

This is an example of Charles' law, sometimes called the temperature-volume law. It states that the volume of a gas is directly proportional to the Kelvin temperature, while pressure and amount are held constant.

The equation is V1/T1=V2/T2, where V is volume and T is temperature in Kelvins.

Known

V1=556 L

T1=30∘C+273.15=303 K

T2=-9∘C+273.15=264 K

Unknown

V2

Solution

Rearrange the equation to isolate V2. Substitute the known values into the equation and solve.

V2=V1T2/T1

V2=(556L×264K)/303K=484.43 L.

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Answer:

2.2

Explanation:

n=3 <— n=5, n= 2 <— n=4 are most energy emitted and n=1 —> n=3, n=2 —> n=4 are most energy absorbed

In chemistry, energy is the capacity to carry out work. It may take on a variety of shapes, including potential, kinetic, thermal, electrical, chemical, radioactive, etc. Heat and labor are other examples of energy being transferred from one body to another. Once it has been transported, energy is always allotted according to its kind. Thus, heat transmission might manifest as thermal energy, but work could produce mechanical energy.

All energy kinds have the characteristic of motion. For instance, a body has kinetic energy if it is moving. A tensioned item, such as a spring or bow, has the capacity to move even while at rest; this property results from the design of the object, which incorporates potential energy.

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From the dilution formula, the final concentration of the solution is  1.4 %.

The final concentration is the concentration at the end of the dilution. We know that dilution is the process by which we add more water to the solution.

Now we have the following;

Initial concentration C1 = 5.4 %

Initial volume V1= 53.5 mL

Final concentration C2= ?

Fina volume V2= 205.0 mL

C1V1 = C2V2

C2 =  5.4 *  53.5/205.0

C2 = 1.4 %

Hence, we have a solution that would have a final concentration of 1.4 %.

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Taking into account the definition of molarity, the molarity of a solution made by dissolving 4.1 grams of NaCl in water to a total volume of 0.4 liters is 0.175 moles/L.

Molar concentration or molarity is a measure of the concentration that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles÷ volume

Molarity is expressed in units moles/L.

In this case, you know:

Replacing in the definition of molarity:

molarity= 0.07016 moles÷ 0.4 L

Solving:

molarity= 0.175 moles/ L

Finally, the molarity of the solution is 0.175 moles/L.

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The hurricane that will most likely caused the greatest damage is option A: 140.

It is one whose speed is 157 mph or more - There will be catastrophic damage: With complete roof failure and wall collapse, a significant portion of frame homes will be lost. Residential areas will be cut off by downed trees and utility poles. Power outages could linger for several weeks or even months. For several weeks or months, the majority of the area won't be habitable.

The most destructive storms are those in category 5, which have sustained winds of at least 157 mph.

Therefore, here, there is complete roof failure and wall collapse, a significant portion of frame homes will be lost. Residential areas will become isolated by downed trees and power lines. Power outages could linger for several weeks or even months.

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Answer:

Chemical bonding is the process by which atoms are held together to form molecules. The bond between atoms is created by the sharing of electrons. The electrons are attracted to the nucleus of the atoms, which creates a force that holds the atoms together.

According to the law of conservation of mass, the total mass of the reacting substances is

A. always more than the total mass of the products.

B. always less than the total mass of the products.

C. sometimes more and sometimes less than the total mass of the products.

D. always equal to the total mass of the products.​

This is the one that I would have to choose.

Hope this helps:)

Answer: shielding constant is +20.494 ppm for σ(P) and À0. 221 ppm for σ(H).

Answer: copper is a fcc.

Explanation:

Solid copper can be described as the arrangement of copper atoms in a face-centered-cubic (fcc) configuration.

Solid copper can be described as the arrangement of copper atoms in a face-centered-cubic (fcc) configuration.

Two of the most recognizable crystal shapes are face-centered cubics (FCC) and body-centered cubics (BCC). There are FCC, BCC, or HCP structures for almost all elements.

The atomic configurations are where FCC and BCC crystals diverge most drastically. All 8 corner positions and the centers of each of the six faces are occupied by atoms in the face-centered cubic structure. All eight corner positions and the cube's center are occupied by atoms in the body-centered cubic structure.

Compared to BCC metals, FCC metals are often more ductile, more stable at high temperatures, and more dense. This is a result of their packaging design and slip systems.

The most effective atomic configuration is found in FCC (tied with HCP).

Because of this, we refer to FCC as a "close-packed" structure. FCC metals will typically be more dense and stable because FCC atoms are grouped more tightly together than BCC atoms.

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When a sample of radon decays by alpha emission, the number of daughter isotopes is two.

Radioactive decay refers to the process by which the nucleus of an atom decays spontaneously with the emission of radiation and the formation of one or more new daughter atoms with as smaller nuclei.

The emission of an alpha particle during radioactive decay involves the emission of helium nuclei.

The emission of alpha particles by radon is shown below:

²²²₈₆Ra ---> ²¹⁸₈₄Po + ⁴₂He

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As per the balanced reaction, 2 moles of potassium gives 2 moles of hydrogen molecules. Thus 11.5 g or 0.302 mol will produce 0.302 moles of hydrogen. The mass of 0.302 mol of hydrogen is 0.604 g.

Hydrolysis is the reaction of a substance with water to form hydroxides or hydrides. The given reaction is hydrolysis of potassium giving 2 moles of H2.

The atomic mass of potassium is 38 g/mol. Thus the mass of 2 mole of potassium is 38 × 2 = 76 g. The number of moles in 11.5  g K is 0.302 moles. 2 moles of potassium gives 2 moles of H2, thus 0.302 moles gives 0.302 moles of H2.

The molecular mass of H2 is 2 g/mol. Thus mass of 0.302 moles is 0.302 × 2 = 0.604 g.

Hence, the mass in grams of hydrogen produced is 0.604 g.

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The molar mass of the protein under the conditions that we have in this question can be obtained to be 12065 g/mol.

We know that the osmotic pressure is one the colligative properties of the solution. The colligative properties are the properties that depend on the amount of substance that is present in the solution.

Mass of the protein = 0.135 g

Volume of the solution = 2.00 mL

Temperature of the system = 28 ∘C + 273 = 301 K

Osmotic pressure of the solution = 0.138 atm

We can get the osmotic pressure from;

π = iCRT

π = Omotic pressure

i = Van't Hoff factor

C = concentration of the solution

R = gas constant

T = temperature

Let the molar mass of the protein be M

0.138 = 1 * 0.135/M/0.002 * 0.082 * 301

0.138 =  1 * 0.135/0.002M * 0.082 * 301

0.138 = 3.33/0.002M

0.138 * 0.002M  = 3.33

M = 3.33/0.138 * 0.002

M = 12065 g/mol

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Answer:

CuCl2 + Aluminum = Chemical / Physical change

Carbon dioxide is generated when any substance that contains carbon is burned. It is also a product of respiration and fermentation. Plants absorb carbon dioxide during photosynthesis.

The true about the luminol is it does not affect the DNA of the substance.

Luminol is a type of chemical which does not affect the DNA of the substance. luminol is used in forensic test by the forensic scientist. luminol solution will react with blood and produce the light.  luminol chemical is sensitive to blood.  in forensic test luminol is used to detect the amount of blood at the crime scene. it will react with the iron in the hemoglobin. luminol is insoluble in water.

Thus, The true about the luminol is it does not affect the DNA of the substance.

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a) The reaction between magnesium chloride solution and sodium carbonate solution is a displacement reaction

b) Aluminum is above copper but below magnesium in the electrochemical series.

We know that a displacement reaction is the kind of reaction that occurs between two substances which involves an exchange of radicals. Now we know that a reaction would certainly produce a new kind of chemical substances.

A displacement reaction would occur if the substances that are involved in  the reaction are far apart in the activity series. The metal that is more reaction would displace the metal that is less reactive from its salt.

Given the fact that sodium is higher than magnesium in the electrochemical series, then magnesium can be displaced from its solution by sodium

In part 2, the aluminum metal is ahead of copper in the electrochemical series hence aluminum is able to displaces  copper from its solution but it is unable to displace magnesium from its solution because magnesium is above aluminum in the electrochemical series.

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1. The reaction between magnesium chloride solution and sodium carbonate solution is a displacement reaction

2. Aluminum is above copper but below magnesium in the electrochemical series.