What is the molar mass of an element that has a mass of 10.4 grams and contains
0.129 moles?
Br
As
Se
K

The standard potential for the galvanic cell at 25°C is 1.98 V.

A galvanic cell or an electrochemical cell is a cell that converts the chemical energy of the reactions occurring within it to electrical energy.

The galvanic cell is able to convert chemical energy to electrical energy as a result of the redox reactions occurring within the cell.

The standard potential for the given galvanic cell at 25°C is calculated as follows

Standard reduction potentials:

Ti³⁺ + 3e⁻ ---> Ti; E° = − 1.21 V (anode)

Fe³⁺⁺+ e⁻--> Fe²⁺ ; E° = 0.77 volts (cathode)

Eºcell = 0.77 V - (-1.21 V)

Eºcell = 1.98 V

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The words "You have the right to remain silent.” means Evan is being read his Miranda rights, option C.

Miranda rights are warnings issued by law enforcements to individuals in custody to protect their rights as part of the criminal procedure rule. These rights were created in 1966 consequently by the Miranda vs Arizona supreme court case.

The Miranda warning contains the words "You have the right to remain silent. Anything you say or do may be used against you in the court of law. You have the right to an attorney.” When the police officers read this to Evan, it was his Miranda rights.

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The volume occupied by the given mass of iron is 0.83 [tex]cm^{3}[/tex].

The term specific gravity has to do with the ratio of the density of an object to the density of water. We must note that density of water is the bench mark that have been used to obtain the densities of every other substances hence it was assigned a density of 1.00 g/ [tex]cm^{3}[/tex].

Now we know from the question that;

Density of water =  1.00 g/ [tex]cm^{3}[/tex]

Specific gravity of iron = 7.87

Mass of the iron = 6.50 g

Density of iron = Specific gravity * density of water =  7.87 * 1.00 g/ [tex]cm^{3}[/tex]

=   7.87 g/ [tex]cm^{3}[/tex]

Given that;

Density = mass/volume

volume = mass/Density

volume = 6.50 g/7.87 g/ [tex]cm^{3}[/tex]

Volume = 0.83  [tex]cm^{3}[/tex]

We can see that from the calculations, the density of the iron as is clear in the procedure is 7.87 g/cm3  and it has a volume of 0.83 cm3 .

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Taking into account the definition of density, the length of each side of the cube is 4 cm.

In other words, density is a quantity that allows to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

2 g/cm³= 128 g÷ volume

Solving:

2 g/cm³× volume= 128 g

volume= 128 g÷ 2 g/cm³

volume= 64 cm³

The volume of a cube is equal to the measure of its side to the cube. That is to say:

Volume = side x side x side = side³

So, the length of each side of the cube can be calculated as:

64 cm³= side³

∛64 cm³= side

4 cm= side

In summary, each side of the cube has a measure of 4 cm.

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The percentage error of the above question is -2.03%.

The percentage error is defined as the approximation error which is present in data value is the discrepancy between an some approximation and exact value to it. This error can also be expressed as a relative error or an absolute error. An approximation error can occur because of the measurement error or computing machine precision.

Make sure in numerator the units off all the digit must be same.

Mathematically, we defined as

Percentage error = (change in value / original value) × 100

(-267.6 - (-273.15) )

= 0. 020

= 2. 020/ (-273.15) × 100

= -2. 03 %

Thus, we concluded that the percentage error of the above question is -2.03%.

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The mass of the zinc II hydroxide produced is 22.77 g.

It is common that we use the stoichiometry of a reaction to be able to obtain the parameters that have to do with the reaction. In his case, we already have the balanced reaction equation of this reaction and this is our basic stock in trade for the task that is ahead of us.

Now we have; 2 NaOH(aq) + Zn(NO₃)₂(aq) → Zn(OH)₂ (s) + 2 NaNO₃ (aq)

Number of moles of the sodium hydroxide =  18.5 g/40 g/mol = 0.46 moles

Number of moles of the zinc II nitrate solution = 1.00 M * 0.800 L = 0.8 moles

If 2 moles of the sodium hydroxide reacts with 1 mole of the zinc II nitrate

0.46 moles  of the sodium hydroxide reacts with; 0.46 moles * 1 mole/ 2 moles

= 0.23 moles

Hence the sodium hydroxide is the limiting reactant.

Thus;

2 mole of sodium hydroxide produces 1 mole of zinc II hydroxide

0.46 moles of sodium hydroxide produces 0.46 moles  * 1 mole/2 moles

= 0.23 moles

Mass of the  zinc II hydroxide =  0.23 moles * 99 g/mol

= 22.77 g

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The state of matter with no definite volume and no definite shape is gas.

Matter is anything that has mass and occupies space.

There are three main physical states in which matter can exist. Each of these physical states has unique properties that are used to identify them.

The three physical states of matter are:

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Option is the right response because it indicates a synthesis reaction (D) 2Na+Cl2 > 2NaCl.

Synthesis reactions are those that take place when two distinct molecules or atoms interact to create a new chemical or molecule. Whenever a synthesis reaction takes place, energy is often released, as well as the process is exothermic. whenever two or more components (compounds or elements) mix to create a new product, a compound having new qualities. They synthesize to create a new material, which is why the process is known as a synthesis.

Bonds connecting two substances are formed during synthesis reactions. As a result, you may want to think about synthesis reactions as processes that help your body create things. Because of this, we can see that synthesis reactions are crucial for both body growth and tissue healing.

A descriptive statement over ranges of selected variables for input and output is the basis for functional synthesis (FS), which tries to produce an implementation. As is customary, FS tasks were formulated as "all exists" equations, wherein input variables are quantified across the board & output variables are quantified existentially.

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Answer:

C+02 > CO2

Explanation:

hope this helps-

The net ionic equation of the reaction as it is shown have been given here by the equation; [tex]Cu^+(aq) + Cl^-(aq) ---- > CuCl(s)[/tex]

The term net ionic equation has to do with the equation that shows the manner in which we are able to convey the information that concerns the ions that do not undergo a change in the reaction.

In this case, we have the reaction that occurs between ammonium chloride and copper II acetate which would produce a copper I chloride and an ammonium acetate product. The net ionic equation would now be;

[tex]Cu^+(aq) + Cl^-(aq) ---- > CuCl(s)[/tex]

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Answer: -207936x>112+2x+83

Ancient Martian riverbed channels were formed by molten lava rather than by liquid water.

Flowing lava can carve and carve paths like water-eroded riverbeds and canyons, and could explain at least one of the winding channels on Mars' surface. Many waterways on Mars were carved by water, but not all. Lava can also flow, creating features similar to stream channels. However, lava functions in many different ways.

Scientists have known since the Mariner 9 mission in 1972 that volcanic structures cover most of the surface of Mars. These features include vast lava flows, vast lava plains, and the largest known volcanoes in the solar system. Massive torrents of water carry rocks and rocks torn from upstream springs. These scratch and abrade the canal floor, creating long lines that floodwaters can wash away and expand.

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83.246 ounces of silver is required to make the silver figure.

It is given that 10.49 g/cm^3 is the density of silver at Room temperature and the volume of Silver is 225cm^3.

To prepare silver of 225cm^3 of volume, we require the following:

Density = Mass/Volume

Mass = Density x Volume

Amount of silver = 10.49x225

Amount of silver = 2360.25 g

We know that,

100g = 3.5274 ounces

Then,

= 3.5274/100

= 0.035274 ounces of silver.

The mass of silver required in ounces = 2360.25 x 0.035274

The mass of silver in ounces = 83.246 ounces.

Therefore the mass of silver needed in ounces is 83.246 ounces. Through this conversion, the amount of any substance can be converted from kilograms to ounces.

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Radiation is produced when unstable or radioactive atoms through the process of becoming stable. We refer to this process as radioactive decay over time. Two protons and two neutrons are lost from the nucleus as a result of alpha decay.

An unstable nucleus releases radiation and changes into the nucleus of one or more additional elements during a nuclear decay process, also known as radioactive decay.

The ensuing offspring nuclei are less energetic and heavier than the parent nucleus that underwent decay, making them more stable.

For example, by producing an alpha particle, the unstable uranium-238 nucleus naturally decays into a thorium-234 nucleus. The most prevalent radioactive decay processes are decay, emission, decay, positron emission, and electron capture.

Thus, Radiation is produced when unstable or radioactive atoms through the process of becoming stable.

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Answer:

below

Explanation:

From periodic table this is dysprosium

Answer:

2 of the children's feet will be webbed, and the other 2 will have paws.

Explanation:

The dominant genes of the Mother will override the recessive genes of the Father, since there isn't 2 of the recessive genes, except for on the other 2 children. If there was a dominant gene, it would have at least 1 capital letter, and that dominant gene would prevent the recessive (lowercase) letter from showing up.

Answer:

Surface tension due to cohesion

Explanation:

Water molecules are polar meaning they have dipoles. The hydrogen end is partially positive while the oxygen end is partially negative. This is because oxygen with high atomic mass attracting most of the molecule's electron cloud to its end.

Due to this phenomenon water molecules act like little magnets that attract each other. The attraction of the molecules forms hydrogen bonds with each other. This is called cohesion (attraction of similar molecules).  Due to this, water is able to create a surface tension that acts like a ‘skin’ and can support some weight (including its own weight) without collapsing.

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Answer:

Cohesion of water

Explanation:

cohesion means sticking together so Before it overflows, the water forms a dome-like shape(rounded) above the rim of the glass. This dome-like shape forms due to the water molecules' cohesive properties, or their tendency to stick to one another.

The element selected is carbon and the isotopes are carbon-12, carbon-13, and carbon-14.

The number of protons, electrons, and neutrons for each isotope of carbon are as follows:

The isotope notation for each is¹²₆C, ¹³₆C, and ¹⁴₆C.

The carbon-14 isotope is used in the radioactive dating of substances.

Isotopes are atoms of the same element that differ from each other in their masses.

Isotopes of the same element have different masses as a result of the difference in the number of neutrons in the nucleus of the atoms of the element.

The existence of isotopes of elements accounts for why the atomic masses of elements are not whole numbers.

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Lewis structure of CH₃-CCH and then hybridization states for the three central atoms is sp³sp³ and sp

A Lewis structure is a very simplified representation of the valance shell electron in a molecule and it is used to show how the electron are arranged around individual atom in a molecule and in propyne there is 3 carbon and in that one carbon is triply bonded so this triply bonded carbon is sp and 2 singly bonded are sp³ hybridized

And the Lewis structure of propyne are

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Answer:

A). Water

PLEASE GIVE BRAINLIEST THANK YOU!!!

Answer:

water

Explanation:

The true statement is that 363 kJ of heat is evolved in the process.

We know that a reaction has to do with the combination of the reactants in order to yield the products. We can see the thermochemical balanced reaction equation of the process as it was written in the question. A thermochemical equation is the type of equation that includes the energy that is absorbed or evolved in the reaction equation.

Now we can see that the reaction shows the combination of hydrogen and oxygen to give two molecules of water. This is a gas phase reaction and heat is given out according to the thermochemical reaction equation.

From the reaction equation;

If 2 moles of hydrogen evolves 484 kJ of energy

1.5 moles of oxygen evolves  1.5 moles *  484 kJ /2 moles

= 363 kJ

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In silicon dioxide the number of the covalent bonds are there between each silicon atom with oxygen atoms is four.

In the silicon dioxide the total number of covalent bond is four between the each silicon atom with the oxygen atoms. The covalent bond is form when the two atoms mutually share the electrons and bond together. the compound which form covalent bond is called as covalent bond. the silicon dioxide form covalent bond because the electronegative difference between silicon and the oxygen is not much.

Thus, In silicon dioxide the number of the covalent bonds are there between each silicon atom with oxygen atoms is four.

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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:

The scale factor is 5. The formula is CH2O.

Multiply each by 5.

So:

C (there is only one)= 1×5

H (there are 2)= 2×5

O(there is only one)= 1×5

Equalling= C5H10O5

The amount of coconut milk added if the final temperature of the soup was found to be 72.0 °C is 430g

The amount of coconut milk added can be found using the equation:

m₁C₁ΔT₁ = m₂C₂ΔT₂

Where m is the mass, C is the specific heat, and ΔT is the change in temperature.

In this equation, m₁ is the mass of the coconut milk, C₁ is the specific heat of the coconut milk, ΔT₁ is the change in temperature of the coconut milk, m₂ is the mass of the soup, C₂ is the specific heat of the soup, and ΔT₂ is the change in temperature of the soup.

We are given the specific heat of the coconut milk and the soup, the change in temperature of the soup, and the final temperature of the soup. This allows us to solve for the mass of the coconut milk, which is m₁.

m₁ = m₂C₂ΔT₁/C₁ΔT₂

m₁ = (1175 g)(3.60 J/g°C)(72.0°C - 90.0°C)/(3.98 J/g°C)(72.0°C - 25.0°C)

m₁ = -427 g

This answer is impossible because the mass of a substance cannot be negative. By solving it in other means we get,

The amount of coconut milk added can be found using the equation

ΔQ = mCΔT

ΔQ is the heat transfer, m is the mass, C is the specific heat, and ΔT is the change in temperature.

We are given the specific heat of coconut milk (Cs = 3.98 J/g°C), the initial temperature of the coconut milk (25.0°C), the final temperature of the soup (72.0°C), and the heat transfer of the soup (ΔQ = 1176 * 3.6*47 = 81168 Joules).

Therefore, the equation becomes:

81168 = m(3.98)(47)

m = 81168 / (3.98 * 47)

m = 81168 / 189.06

m = 429.6 grams

The amount of coconut milk added was 429.6g which could be rounded off as 430g

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Answer:

Condensation

Explanation:

We can see that H2O is formed when the two molecules join together, which is a characteristic of Condensation polymerization

Answer: Between non-metals

Explanation:

The ratio of the carbon to other atoms would be 2.49375:3.9901:1.000 and the empirical formula of the compound would be  [tex]C_2H_8O[/tex]

The compound contains C, H, and O according to the following information:

C = 4.9875 mol

H = 7.9802 mol

O = 2.00 mol

In order to obtain the empirical formula of the compound, divide the mol of each atom by the smallest mol. In this case, the smallest mol is 2.00

C = 4.9875/2.00

  = 2.49375

H = 7.9802/2.00

    = 3.9901

O = 2.00/2.00

   = 1.0000

Thus, the ratio of carbon to the rest of the atoms present in the compound is 2.49375:3.9901:1.000

In order to find the empirical formula of the compound, the mole of each atom needs to be approximated to the nearest whole number.

C = 2

H = 8

O = 1

Thus, the empirical formula of the compound is [tex]C_2H_8O[/tex].

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Conducting an autopsy means Jacob is basically dissecting human  bodies to determine how someone died.

An autopsy, also known as a post-mortem examination, is a specialized surgical procedure used to determine the cause and manner of death. The cause of death is generally the medical reason explaining why a patient passed. The manner of death is usually the circumstances surrounding the death.

What we learn from autopsies allows clinicians to better understand the disease processes, accurately diagnose diseases, improve therapy, and also potentially aid other patients who are currently suffering from a similar disease. There are many reasons why families choose to pursue having an autopsy done. Consent for an autopsy includes diagnostic, education, quality improvement, and research.

It is mostly used by the law enforcements as well to know also catch the culprits.

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Answer:

V2 = 0.075 L

Explanation:

P1= first pressure 

P2= second pressure 

V1= first volume 

V2= second volume 

P1V1 = P2V2=
(0.20 atmospheres)(15 L) = (40 atmospheres)V2=

V2 = (0.20 atmospheres)(15 L)/(40 atmospheres)=

V2 = 0.075 L

The net ionic equation is :

Ba²⁺  +  2OH⁻ +  2H⁺  +  SO₄²⁻   ---->   BaSO₄  +  2H₂O

The balanced molecular equation is given as:

Ba(OH)₂   +  H₂SO₄   ----> BaSO₄  +  2H₂O

The net ionic equation is the equation in which we breaking up into ions and cut off the spectator ions that is the ion which is common in both side , we get :

complete ionic equation first :

Ba²⁺  +  2OH⁻  +  2H⁺  +  SO₄²⁻  ---->    BaSO₄  +  2H₂O

now. there are no spectator ion so net ionic equation is same :

Ba²⁺  +  2OH⁻ +  2H⁺  +  SO₄²⁻   ---->   BaSO₄  +  2H₂O

Thus, The net ionic equation is :

Ba²⁺  +  2OH⁻ +  2H⁺  +  SO₄²⁻   ---->   BaSO₄  +  2H₂O

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