What is the formula for the ionic compound formed by calcium and selenium?

Answer:

2Be + O2 = 2BeO

its a synthesis

Explanation:

Answer:

Potential energy is the stored energy of position possessed by an object.

Potential energy is described as stored energy. Depending on the relative positions of various system components, stored energy. When a spring is squeezed or extended, its potential energy increases.

Potential energy is the power that an item may store due to its position in relation to other things, internal tensions, electric charge, or other circumstances.

A boulder perched precariously atop a cliff. The rock will be moving if it falls, converting the potential energy to kinetic energy. a longbow's stretched-elastic string.

Potential energy is the energy that is stored in any item or system as a result of its location or component arrangement. The environment outside the object or system, such as air or height, has no impact on it. Conversely, kinetic energy is the force that propels the particles of an item or a system into motion.

Since light has no mass and is an example of electromagnetic radiation, it possesses neither kinetic nor potential energy. The remaining forms exhibit both kinetic and potential energy characteristics.

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Explanation:

If you use the SI units for P, n, R and T ( In Pa, mol, JK-1mol-1 and K respectively) you'll end up with a Volume with m3 units. So if you have others in different units first convert them into the units I mentioned above and you will definitely get the answer in m3.

Answer: If two positive charges interact, their forces are directed against each other. The two charges repel each other.

Explanation: The same occurs with two negative charges, because their respective forces also act in opposite directions.) The electric field and resulting forces produced by two electrical charges of the same polarity.

Good luck luv.

the answer is using rollers in conjunction with inclined plane.

This problem is providing the initial volume and pressure of a gas as 675 mL and 1.5 atm and then mentions the final volume as 345 mL and asks for the new pressure of the gas.

Thus, we start off this problem by recalling the concept of Boyle's law as an inversely proportional relationship between pressure and volume:

[tex]P_1V_1=P_2V_2[/tex]

In which we solve for the final pressure, [tex]P_2[/tex] as shown below:

[tex]P_2=\frac{P_1V_1}{V_2} \\\\\\P_2=\frac{675mL*1.5atm}{345mL} \\\\\\P_2=2.93atm[/tex]

Considering we had to cancel out the milliliters to obtain atm as units of pressure.

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Answer:

Carbon dioxide

Explanation:

Metal oxides are basic and Non metal.oxides are acidic.

Al, Be, Zn,Sn ,Pb oxides are amphoteric so they show both acidic and basic properties.

From the above answers Al, Cu and Mg are metals so their oxides are acidic while Carbon is a non metal.so CO2 is an acidic oxide

Answer:

Isoelectronic means same electronic configuration as Ar. These are such as sulfide ion (S2− ), chloride ion (Cl− ) and phosphide ion (P3− ).

Explanation:

Any atom or ion with 18 electrons is isoelectronic with Ar. Some examples are:

Isoelectronic atoms or ions refer to those that possess an identical number of electrons consequently sharing the same electron configuration. The term "isoelectronic" derives from the Greek words "isos " signifying "equal " and "elektron " denoting "electron".

It is worth noting that isoelectronic atoms or ions may exhibit varying atomic numbers and charges; nonetheless, their electron count remains constant.

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Answer:

Z= 10.8

Explanation:

The simple formula Z + X = Y can solve this problem. Since we are given that,

Then we can just substitute the actually values for the letters.

Z + 8.7 = 19.5

From here, we can just do simple math to find the answer.

Z + 8.7 - 8.7 = 19.5 - 8.7

Z = 10.8

So, 10.8 grams of Z reacted to form the product.

Answer:

0.116 moles

Explanation:

To go from grams to moles, you take the given mass (1.39g) and divide it by the molar mass (which is about 12 grams for Carbon). This gives you the moles. I have attached my work below.

Hope this helps! :^)

Answer:

Explanation:

NASA uses rockets to launch astronauts and supplies to the International Space Station. Launching a rocket relies on Newton's Third Law of Motion. A rocket engine produces thrust through action and reaction. The engine produces hot exhaust gases which flow out of the back of the engine

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Answer:

see explanation

Explanation:

Break down the following equations into two half equations(One for oxidation, one or reduction )

1. Cu + 2Ag+ ➡️Cu2+ +2Ag

2. Cl2 +2I- ➡️I2 + 2Cl​-

in reaction "1", the copper is being oxidized from 0 to +2 by losing 2 electrons

Cu---->Cu2+   + 2e-in reaction "2

in reaction "1" the silver is being reduced by gaining those 2 e-.

2Ag1+  + 2e----------->2Ag

In reaction "2", the iodine is being oxidized by losing 2 e-

2I- -------------> I2 + 2e

In reaction "2" the chlorine is being reduced by gaining those 2 e

Cl2 + 2e------------> 2Cl-

To solve such this we must know the concept of redox reaction. Therefore, the half reaction for the given reactions can be written as

1. Cu + 2Ag⁺ [tex]\rightarrow[/tex]Cu²⁺ +2A

Cu [tex]\rightarrow[/tex]Cu²⁺   + 2e⁻

2Ag⁺ + 2e⁻[tex]\rightarrow[/tex]2Ag

2.Cl[tex]_2[/tex]+2I⁻ [tex]\rightarrow[/tex]I[tex]_2[/tex] + 2Cl​⁻

2I⁻[tex]\rightarrow[/tex] I[tex]_2[/tex] + 2e⁻

Cl[tex]_2[/tex] + 2e⁻-----------> 2Cl⁻

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Redox reaction is a chemical reaction where oxidation and reduction takes place simultaneously. Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant.

1. Cu + 2Ag⁺ [tex]\rightarrow[/tex]Cu²⁺ +2A

Cu [tex]\rightarrow[/tex]Cu²⁺   + 2e⁻

2Ag⁺ + 2e⁻[tex]\rightarrow[/tex]2Ag

2.Cl[tex]_2[/tex]+2I⁻ [tex]\rightarrow[/tex]I[tex]_2[/tex] + 2Cl​⁻

2I⁻[tex]\rightarrow[/tex] I[tex]_2[/tex] + 2e⁻

Cl[tex]_2[/tex] + 2e⁻-----------> 2Cl⁻

Therefore, the half reaction for the given reactions can be written as above.

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The two properties of an electron which can be expressed with quantum numbers are angular momentum and spin.

The properties of an electron in an atom can be represented using four sets of quantum numbers. These four sets of quantum numbers include;

Among the options given in the question, the two properties of an electron which can be expressed with quantum numbers are angular momentum and spin.

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Answer:

The awnser is Ionic bond

Explanation:

The ice cube which was solid has turned into the liquid water because the air temperature is warmer than the freezers. Which means the ice particles gather heat energy from the warmer air. Therefore the ice particles have enough energy to break apart (melt)into smaller particle arrangements.

Answer:

The expression for the wavelength of radiation is,

λ

1

=R(

n

1

2

1

−

n

2

2

1

)

Substitute values in the above expression,

λ

1

=109677×(

2

2

1

−

4

2

1

)=109677×(

4

1

−

16

1

)=109677×(

64

12

)

λ=4.86×10

−5

cm=486×10

−9

m=486nm.

The line belongs to bluish green colour.

Answer:

It is possible to divide cells into two classifications: eukaryotic cells, which have a nucleus, and prokaryotic cells, which do not possess a nucleus but do contain a nucleoid area. In contrast to prokaryotes, which are one-celled creatures, eukaryotes may be either single-celled or multicellular in nature.

Explanation:

Hope it helps:)

Answer:

The reaction quotient!

Explanation:

hope this helped :D

crystallization is a process which helps to separate a pure solid from a solution in its crystal form. This is the in use to purify solid. For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

Sugar and salt are examples of products where crystallization does not only serve as separation/purification technique, but where it is also responsible for getting crystals with the right size (and shape) for further application of the products.

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Answer:

Crystallization is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

Sugar and salt are two mixtures that can be seperated by crystallization

Explanation:

Explanation:

Here you go, my teacher hasnt graded it yet.

Explanation:

eggsus8d8ruttuririiryrey

Answer:

OPTION C is correct

When magnesium burns, it combines with oxygen (O2) from the air to form magnesium oxide (MgO) according to the following equation: 2Mg(s) + O2(g) → 2MgO(s) Magnesium oxide is an ionic compound containing Mg2+ and O2− ions whereas Mg(s) and O2(g) are elements with no charges.

To solve this, we have to turn the moles into atoms:

2.5 moles/1 x 6.022x10^23 atoms/1 mole = 15.05 x 10^23 atoms

Answer: 15.05 x 10^23 atoms

I hope this helps!

Silicon is the eighth most abundant element in the Universe. There will be 15.05 * 10²³ atoms in the silicon.

Silicon is the eighth most abundant element in the Universe; it is made in stars with a mass of eight or more Earth suns.

Near the end of their lives these stars enter the carbon burning phase, adding helium nuclei to carbon to produce oxygen, neon, magnesium and silicon.

1 mole contains  6.022x10²³ atoms.

2.5 mole contains = x atoms.

x= 2.5 moles/ 6.022x10²³ atoms.  

  = 15.05 x 10²³ atoms

Therefore, Silicon is the eighth most abundant element in the Universe. There will be 15.05 * 10²³ atoms in the silicon.

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This problem is asking for the major alkyne product that is formed when 1,1‑dichloro‑3‑methylbutane reacts with sodium amide (NaNH₂) ignoring any byproduct.

Thus, we can firstly say that such reaction of an alkyl halide with a strong base such as sodium amide is able to remove the halogen-based substituents and hence form insaturations in the form of double or triple bonds depending on the degree of substitution.

For instance, if one halogen substituent, then an alkene will be formed; but if two, then an alkyne (like this problem).

In such a way, as shown on the attached figure, the product will be 3-methylbutyne due to the loss of two chlorine substituents.

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a.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

The atom that loses the valence electron is called the electron donor while the atom that accepts the electron is called the electron acceptor.

Ionic bond usually occurs between metals and non metals.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

b.

The force of attraction between Na⁺ and Cl⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

c.

The force of attraction between Mg²⁺ and O²⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

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An ionic or electrovalant bond is a type of chemical bond, which is formed  from two ions (charged atoms by loosing or gaining electrons) having opposite charges.

Ionic bonds are formed from the transfer of electrons from one atom to another. As the electrons are transferred there occurs a positively charged ions (cations) and a negatively charged ions (anions). These ions are held together in a crystal lattice structure by the strong electrostatic attraction between the positively charged cations and negatively charged anions.

The electrons are transferred as the atoms have tendencies to achieve a stable electronic configuration. They do this to attain a stable atomic structure. By transferring the electrons they attain their octet or duplet.

Sodium chloride(NaCl) is formed when the atom of sodium combines chemically with chlorine atom to generate an ionic compound.

Since sodium has an atomic number of 11, its electronic configuration is 2, 8, 1. There is only one electron in the outermost shell of a sodium atom. Therefore, the sodium atom gives one electron to produce the sodium ion Na⁺.

Chlorine has an atomic number of 17. Hence, its electronic configuration is 2, 8, and 7. The chlorine atom contains seven electrons in its outermost shell and requires one more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a chlorine atom accepts one electron and creates the negatively charged chloride ion (Cl⁻).

When sodium interacts with chlorine, it donates its outermost electron to the chlorine atom, forming a sodium ion (Na⁺) and a chloride ion (Cl⁻) by accepting an electron. The strong electrostatic force of attraction between the newly created ions, holds sodium and chloride ions together to create sodium chloride, Na⁺Cl⁻ or NaCl.

Similarly in the case of Magnesium Oxide (MgO) is formed from the chemical interactions of Magnesium and oxygen atoms, leading to the formation of an ionic compound.

Since magnesium has an atomic number of 12, its electrical configuration is 2, 8 and 2, there is just 2 electrons in the outermost shell of a Magnesium atom. Therefore, the magnesium atom gives two electron to produce the Magnesium ion Mg²+ .

Oxygen has an atomic number of 8. Hence, its electronic configuration is 2 and 6, the oxygen atom contains 6 electrons in its outermost shell and requires 2 more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a oxygen atom accepts 2 electronelectrons and creates the negatively charged oxide ion (O²-).

When magnesium interacts with oxygen, it donates its outermost electrons to the oxygen atom, generating a Magnesium ion Mg²+ .  And an oxygen ion (O²⁻) by acquiring 2 electrons. The attractive electrical force holds magnesium and oxygen   ions together to create sodium chloride,        Mg²⁺ O²⁻ or MgO.

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Sorting the chemical elements in order from least reactive to most reactive, we have:

1. Fluorine (F).

2. Arsenic (As).

3. Antimony (Sb).

4. Silicon (S).

Given the following chemical elements:

Reactivity can be defined as a chemical property which determines how readily a chemical element bonds with other chemical elements, in order to form a new chemical compound.

Generally, the ability of a chemical element to bond with other chemical elements is largely (highly) dependent on the number of valence electrons it has in the outermost shell of its atomic nucleus.

As a general rule, chemical elements that are having fewer number of valence electrons are the most reactive while those having higher valence electrons are least reactive.

Also, chemical reactivity decreases down a group on the periodic table.

Based on the periodic table, the valency for the given chemical elements are:

In conclusion, sorting the chemical elements in order from least reactive to most reactive, we have:

1. Fluorine (F).

2. Arsenic (As).

3. Antimony (Sb).

4. Silicon (S).

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Answer: The answer is elastic potential energy

Explanation: Potential energy is stored energy if something is elastic that means the shape or form of an object is being compressed from its original form. Like elastic girl from the incredibles lol. but anyways if you compare somehting to a rubber band it has elastic potential energy Thus the answer is D.

Hope this helps :).

When you bend, stretch, or compress an object from its natural shape, it stores Elastic potential energy.

Elastic energy is the mechanical potential energy held in a material's or a physical system's configuration as it is subjected to elastic deformation as a result of work being done on it. Elastic energy is created when objects are momentarily crushed, stretched, or otherwise deformed.

Because it is stored in the bonds between atoms of an object or substance when it is momentarily stressed, elastic energy is a type of potential energy. The object may have been stretched or compressed, causing this stress.

An object's shape may change as a result of a force operating on it. If stretched or compressed, elastic things can store elastic potential energy. This occurs, for instance, when a spring is stretched or a catapult is utilized.

Thus, option D is correct.

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The pressure of this gas in atm is equal to 1.63 atm.

Given the following data:

To calculate the pressure of this gas, we would use the ideal gas law equation;

[tex]P=\frac{nRT}{V}[/tex]

Where;

Substituting the given parameters into the formula, we have;

[tex]P=\frac{0.742 \times 0.0821 \times 291}{10.91} \\\\P = \frac{17.73}{10.91}[/tex]

Pressure, P = 1.63 atm.

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Answer:The first thing you need to do is calculate the molar mass of C4H10.

Explanation: