Ca reacts with element X to form an ionic compound with the formula CaX. Al will react with X to form ________.

Answer:

See Explanation

Explanation:

Alpha Decay is the emission of helium nuclei (₂He⁴). That is, two protons and two neutrons are emitted. By formula equation ...

₈₂Pb²⁰⁸ => ₈₀Hg²⁰⁴ + ₂He⁴ =>  ₈₀Hg²⁰⁴ + (₂α⁴)⁺²

Note the sum of superscripts & subscripts of reactants (₈₂Pb²⁰⁸) must equal sum of superscripts & subscripts of products (₈₀Hg²⁰⁴ + ₂He⁴); that is ...

∑mass reactants = ∑mass products => 208 = 204 + 4

∑atomic no. reactants = ∑atomic no. products => 82 (Pb) = 80 (Hg) + 2 (α⁺²)

Hope this helps. Doc :-)

Answer:

0.024 mm

Explanation:

The quantity of charge deposited Q = It where I = current = 84.780000 mA = 0.084780000 A and t = time = 3.670000 hours = 3.670000 × 3600 s = 132120000 s.

Also Q = nF where n = number of moles of electrons silver deposited and F = Faraday's constant = 96500 C/mol

So, It = nF

n = It/F = 0.084780000 A × 132120000 s/96500 C/mol = 1120.1134 C/96500 C/mol = 0.012 mol

So, we have 0.012 mol of electrons

Our chemical equation is

Ag⁺ + e⁻ → Ag

Since 1 mol of electrons deposits 1 mol of silver atoms, then, 0.012 mol of electrons deposits 0.012 mol of silver atoms.

Since number of moles of silver atoms, n' = m/M where m = mass of silver atoms deposited and M = molar mass of silver = 107.868 g/mol

So, m = n'M

since n' = 0.012 mol,

m = 0.012 mol × 107.868 g/mol = 1.294 g

Since density of silver ρ = m/V where m = mass of silver deposited = 1.294 g and V = volume of silver deposited

V = m/ρ

Since, ρ = 10.650000 g/cm³

V = 1.294 g/10.650000 g/cm3 =

V = 0.122 cm³

Since the dimensions of the measuring rod are 13.870000 x 3.640000 x 5.980000 cm which represent its length, l, width, w and height, h respectively, the volume of silver deposited V = Ah' where A = area of the rod, lw and h' = thickness of silver deposited

So, V = Ah

V = lwh'

h' = V/lw

= 0.122 cm³/13.870000 cm x 3.640000 cm

= 0.122 cm³/50.4868 cm²

= 0.0024 cm

= 0.024 mm

This equation shows the key species involved in the reaction without including the spectator ions. The net ionic equation for the reaction between aqueous solutions of magnesium nitrate and sodium phosphate is:  Mg2+(aq) + PO43-(aq) → Mg3(PO4)2(s)

In this reaction, magnesium ions and phosphate ions combine to form solid magnesium phosphate. Meanwhile, the sodium ions from the sodium phosphate combine with the nitrate ions from the magnesium nitrate to form a solution of sodium nitrate.

The full balanced equation for this reaction is:
3 Mg(NO3)2(aq) + 2 Na3PO4(aq) → Mg3(PO4)2(s) + 6 NaNO3(aq)
Note that the coefficients are multiplied by 2 and 3 to ensure that the number of each type of ion is balanced on both sides of the equation.

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Explanation:

Molar mass of

B

=

10.81

g

⋅

m

o

l

−

1

. If there are 36 odd grams of

B

, there are approx.

7

2

×

N

A

boron atoms, where

N

A

is Avogadro's number.

Explanation:

35.76

⋅

g

10.81

⋅

g

⋅

m

o

l

−

1

×

6.022

×

10

23

m

o

l

−

1

=

?

?

Answer link

MAT

Nov 15, 2015

1.991

×

10

24

Explanation:

Molar mass of B = 10.81g/mol

So, 1 mole of B = 10.81g

and 1 mole =

N

A

=

6.023

×

10

23

By combining,

10.81g of B =

6.023

×

10

23

atoms of B

thus,

35.76g of B =

6.023

×

10

23

10.81

×

35.76

35.76g of B =

1.991

×

10

24

48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

Avogadro's number is the number of particles in one mole of substance. 6.022 × 10²³ is known as Avogadro's constant / Avogadro's number.

Avogadro's number = 6.022 × 10²³

How to find the number of atoms ?

Number of atoms = Number of moles  × Avogadro's Number

                             = 8.0 × 10⁻⁶ × 6.022 × 10²³

                             = 48.176 × 10¹⁷ atoms of boron

Thus, from the above conclusion we can say that 48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

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A molecular formula is a chemical formula for a molecular compound that shows the types and numbers of atoms in the compound's molecule. Ammonia is a nitrogen-hydrogen compound.

The total number of shared electrons in a molecule is 22.

Ionic and covalent compounds are the two types of compounds. Molecules are the most basic unit of a covalent compound, and they can be represented in a variety of ways.

Atoms are the smallest units of matter that retain an element's fundamental chemical properties. However, much of the study of chemistry is concerned with what happens when atoms combine to form compounds. A compound is a unique collection of atoms held together by chemical bonds.

The electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it holds the structure of the atom together, and the stability within chemical bonds is also due to electrostatic attractions. Consider the two most common types of chemical bonds: covalent bonds and ionic bonds. Two atoms share pairs of electrons in covalent bonds, whereas electrons are fully transferred between two atoms in ionic bonds.

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Answer:

Potential energy

Explanation:

The energy accumulated in an entity as a result of its location relative to a neutral level is known as potential energy. If such an object is detected at a height greater than zero, it has gravitational force.

Sulfate ions will move from left to right through the salt bridge. The salt bridge allows the passage of ions between solutions.

An electrochemical cell is a cell where electrical energy is produced as a result of chemical reactions.

We have to note that the anions tend to move from the cathode to the anode hence, sulfate ions will move from left to right through the salt bridge.

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124 L is the correct answer

Thus, the volume of the helium is 124 L when the balloon rises to an altitude where the pressure is only 25 kPa.

What is temperature ?

Temperature is a measure of the thermal energy of a substance or system. It reflects the degree of hotness or coldness of a material, and is a crucial parameter in many physical and biological systems. It is usually measured in units of kelvins, Celsius, or Fahrenheit. The Kelvin scale is an absolute temperature scale, where 0 K represents absolute zero, the temperature at which all matter has no thermal energy. The Celsius and Fahrenheit scales are relative temperature scales, with 0°C and 32°F defined as the freezing point of water and 100°C and 212°F defined as the boiling point of water.

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Star A will have blue color as hottest stars are blue in color.

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Answer:

na.

sodium

11( 2,81,)

pls Mark me as brainlest

The correct term to complete your question is "path." A file path shows the location of a file or folder.

File path literally denotes the location of a specific file.

In other words, this indicates that a file's path determines or specifies location of a file or a folder.

Consider a text file named abc that is located on the desktop. Its file location might be C:UsersHPDesktopabc.txt.

Other options are file type, which refers to the kind of file—it might be a text file, an image, etc.—and file extension, which is a suffix that tells what kind of file it is (like jpg, txt, or png).

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Answer:

1.82

Explanation:

pH is given by the equation

Answer:

A mixture of molecules is a group of molecules in which there are multiple different elements and atoms, that are in either fixed proportions or random. There are heterogeneous and homogenous mixtures.

Explanation:

Taking into account the reaction stoichiometry, 109.09 grams of Ag₂S₂O₃ are formed when 125 g AgBr reacts completely.

In first place, the balanced reaction is:

2 AgBr + Na₂S₂O₃ → Ag₂S₂O₃ + 2 NaBr

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 375.54 grams of AgBr form 327.74 grams of Ag₂S₂O₃, 125 grams of AgBr form how much mass of Ag₂S₂O₃?

\(mass of Ag_{2} S_{2} O_{3} =\frac{125 grams of AgBrx327.74 grams of Ag_{2} S_{2} O_{3}}{375.54 grams of AgBr}\)

mass of Ag₂S₂O₃= 109.09 grams

Then, 109.09 grams of Ag₂S₂O₃ are formed when 125 g AgBr reacts completely.

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Answer:

color of water remains same

Answer:

Carbon-12 has 12 and Carbon-13 has 13, thats the atomic mass.  

Explanation:

Answer:

Yes

Explanation:

Answer:

THATS WHAT SHE SAID

Explanation:

Answer:

There are 122.1982401 moles of  H2O in \(7.36*10^{25}\)  molecules of H2O

Explanation:

We know,

\(6.023*10^{23}\)  molecules of H2O contains 1 mole H2O

            1      molecules of H2O contains \(\frac{1}{6.023*10^{23}}\)  mole H2O

∴ \(7.36*10^{25}\) molecules of H2O contains \(\frac{1}{6.023*10^{23}}*(7.36*10^{25})\) moles of H2O

                                                               = 122.1982401 moles of  H2O

∴ There are 122.1982401 moles of  H2O in \(7.36*10^{25}\)  molecules of H2O

The maximum number of electrons that can occupy 2p orbitals is six.

In atomic theory, each orbital has a maximum capacity for two electrons, one with a spin-up (+1/2) and the other with a spin-down (-1/2). The 2p orbitals consist of three separate orbitals labeled as 2px, 2py, and 2pz. These orbitals are oriented along the x, y, and z axes, respectively.

Since there are three 2p orbitals, the total number of electrons that can occupy them is 2 electrons per orbital x 3 orbitals = 6 electrons. This means that each of the 2p orbitals can accommodate a maximum of two electrons.

The 2p orbitals are higher in energy than the 2s orbital, and they are typically filled after the 2s orbital in the electron configuration of atoms. Understanding the maximum electron capacity of orbitals is important for determining the electronic structure and chemical behavior of elements.

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To draw a tetrahedral representation, assign priority groups to each chiral center and arrange the remaining groups in a tetrahedral shape.

Certainly! Here is a step-by-step explanation of how to draw a tetrahedral representation of the (2s,3s) enantiomer of 1-bromo-2,3-dimethylpentane:

Begin by drawing the skeletal structure of the molecule, which consists of a pentane chain with a bromine atom attached to the first carbon and two methyl groups attached to the second and third carbons.

Identify the chiral centers in the molecule, which are the second and third carbons.

For the second carbon, assign the highest priority group (in this case, the bromine atom) to the back of the molecule.

The remaining three groups (two methyl groups and a hydrogen atom) are then arranged around the second carbon to form a tetrahedron, with the lowest priority group (in this case, the hydrogen atom) pointing towards the viewer.

Repeat the same process for the third carbon, assigning the highest priority group (in this case, one of the methyl groups) to the back of the molecule.

The remaining three groups (the bromine atom, the other methyl group, and a hydrogen atom) are then arranged around the third carbon to form a tetrahedron, with the lowest priority group (in this case, the hydrogen atom) pointing towards the viewer.

The resulting tetrahedral representation should show the (2s,3s) enantiomer of 1-bromo-2,3-dimethylpentane as two tetrahedrons connected by a pentane chain, with the groups arranged in a specific configuration around each chiral center.

By following these steps, you should be able to draw an accurate tetrahedral representation of the (2s,3s) enantiomer of 1-bromo-2,3-dimethylpentane.

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The complete question is:

Can you provide a step-by-step explanation of how to draw a tetrahedral representation of the (2s,3s) enantiomer of 1-bromo-2,3-dimethylpentane?

a. Stellar Nebula:

The fusion process in a stellar nebula begins with the fusion of hydrogen atoms to form helium.

As the fusion continues, helium accumulates and eventually enough pressure and heat are generated to trigger the fusion of helium into heavier elements, such as carbon, nitrogen, and oxygen.

b. Average/Medium Sized Star:

In an average-sized star, hydrogen fusion continues and generates more heat and pressure, allowing for the fusion of heavier elements such as helium, carbon, and oxygen.

As the fusion process continues, heavier elements such as neon, magnesium, and silicon are produced, leading to the formation of heavier elements such as iron.

c. Red Giant:

In a red giant, the outer layers of the star expand and cool, exposing the core. The core then contracts and heats up, causing the fusion of helium into heavier elements such as carbon, nitrogen, and oxygen.

The fusion process in a red giant generates a large amount of energy and creates elements such as neon, magnesium, and silicon, as well as heavier elements.

d. Red Supergiant:

In a red supergiant, the core continues to contract and heat up, causing the fusion of heavier elements such as carbon, nitrogen, and oxygen.

The fusion process in a red supergiant generates a tremendous amount of energy and leads to the formation of elements such as neon, magnesium, and silicon, as well as even heavier elements.

The energy from the sun's nuclear fusion affects the Earth in several ways:

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Answer:

They both combine with The help of valency, which is the combining capacity of elements

Explanation:

I find it easier to understand valency as part of the Bhor’s model of an atom.

In his model, it was stated that electrons are spread around the nucleus in such a way that there are rings around the model. Each ring has a n value. So, k has 1, l has 2, m has 3 and n has 4...

what you need to know to find the number of electrons in each ring is to solve the formula 2n squared

Then, the valency is the 8 minus the number of electrons in the outermost shell. Remember that 8 is max number I;outer most shell. If you try it out for oxygen, you will get the value of 2 remaining, which can be gained if combined with calcium.

Hope it helps

Answer:

The person who just wanted points is annoying

Explanation:

WHY WOULD YOU DO THAT

Answer:

The dirty dozen.

Explanation:

This is mainly seen in the control of hazardous waste and its regulations through treaty in the control of persistent organic pollutant(POPs). This regulation is seen to occur in 12 widely used persistent organic pollutants; these are seen to have the ability to absorb and store tissues that make them fatty especially in humans and also animals found in the higher trophic levels or in the food web. That being said, it can be noted that the dirty dozen can move or even attain hundreds, or thousands of levels towards the environ and also in other cases, transporting them through air or water as the case may be.

Answer:

While both the ethanol and the water eventually will reach the same temperature, the ethanol will cool first. Thus, the correct answer is D.

Explanation:

The specific heat capacity of a substance is the amount of heat energy required to raise the temperature of a unit mass of the substance by 1 °C. We're told that ethanol's specific heat capacity is 2.671 J/g °C and water's is 4.184 J/g °C.

Ethanol has a lower specific heat capacity than water. This means that for a given amount of energy, the temperature of a given mass of ethanol will increase by a greater amount than the same mass of water. Therefore, ethanol requires less energy to raise its temperature by 1 °C. Conversely, this also means that ethanol will lose heat at a faster rate than water; when ethanol and water are placed in a cooler environment, the ethanol will lose heat at a faster rate than the water and therefore cool down faster.

When energy is added to a substance, its temperature increases; when energy is removed from a substance, its temperature decreases. The change in a substance's temperature is inversely proportional to the substance's specific heat capacity. When both the ethanol and the water are placed in cooler surroundings, heat will flow from them to the environment until thermal equilibrium is reached. So, while both the ethanol and the water will eventually reach thermal equilibrium with their surroundings (i.e., they will both reach the same temperature at the end), ethanol will lose heat at a faster rate than water, and therefore it will cool down faster.

The distribution of electrons in an element's atomic orbitals is described by the element's electron configuration. Atomic electron configurations are written using a standard notation.

Electron configurations define the arrangement of electrons around an atom's nucleus. Lithium, for instance, contains two electrons in the 1s subshell and one electron in the 2s subshell, according to its electron configuration, 1s22s1.

Determine the configuration of the neutral atom first before determining the electron configuration for an ion. Then, depending on the charge of the ion, either add or subtract electrons. For instance, start with neutral lithium (1s22s1) to get the configuration for the lithium-ion (Li+).

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