1. What is the name of this compound?
H2O

2. What is the name of this compound?
SO3

3. What is the name of this compound?
PF5

4. What is the name of this compound?
NH3

5. What is the name of this compound?
BrCl5

6. What is the name of this compound?
PCl3

7.What is the name of this compound?
N2H4

Answer:The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. ... The only way to use energy is to transform energy from one form to another.

Answer:

law of conservation of energy is energy cannot be created or destroyed but can be transformed from one form to another

it is true as potential energy can be converted into kinetic energy

Answer:

630.95 grams of Na₂CO₃ would be needed to produce 1000g of NaHCO₃

Explanation:

The balanced reaction is:

Na₂CO₃ + CO₂+ H₂O → 2 NaHCO₃

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

Being the molar mass:

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

You can apply the following rule of three: if 106 grams of Na₂CO₃ are needed to produce 168 grams of NaHCO₃, how much mass of Na₂CO₃ is necessary to produce 1000 grams of NaHCO₃?

\(mass of Na_{2} CO_{3}=\frac{1000grams ofNaHCO_{3} *106gramsofNa_{2} CO_{3} }{168grams ofNaHCO_{3}}\)

mass of Na₂CO₃= 630.95 grams

630.95 grams of Na₂CO₃ would be needed to produce 1000g of NaHCO₃

Answer:

a. molarity

e. molality

h. density

b. weight percent

g. volume percent

Explanation:

Molarity is defined as the number of moles of substance dissolved in per  liter of solution (moles/Liter). It is also called molar concentration of the solution.

Molality is defined as the number of moles of substance dissolved in one kg or kilogram of solvent and its SI unit is mol/kg.

Density is defined as the mass divided by its volume.

density =mass/volume

Weight percent is defined as the division of mass of a solute to the mass of the total solution, multiplied by 100. To calculate the weight percent or mass percent, both mass of a solute and the mass of a solution is required to express the concentration of a solution.

Volume percent is defined as the ratio of the volume of the solute to the volume of the total solution multiplied by 100.

Based on the potential energy diagram and the potential energies of reactant and product the synthesis and double replacement reactions are endothermic. The single replacement reaction is exothermic and the ΔH is negative.

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products. The reaction absorbs energy from its surroundings. The energy that manifests as heat. Examples include cooking, evaporation, gas molecules, melting of ice, and photosynthesis.

An exothermic reaction is one in which energy is given off as heat or light. The mechanism releases energy into its surroundings. Energy can be emitted as sound, light, heat, or electricity. Examples include rusting iron, settling, chemical bonds, explosions, and nuclear fission.

A potential energy diagram, also known as a reaction progress curve, is a visual representation of the energy changes that take place during a chemical reaction. A diagram of potential energy illustrates how a system's potential energy changes as reactants are changed into products. Note that an exothermic reaction results in a negative enthalpy change while an endothermic reaction exhibits a positive enthalpy change. The diagrams of potential energy show this. When the system absorbs energy from its environment, its overall potential energy rises for the endothermic reaction. As the system undergoes the exothermic process, the system's overall potential energy declines.

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A balloon of 21cm diameter can hold 8.57×10²³ atoms of He.

We know,

Mass of He = density × volume

= 1.8 × 4/3πr³

r = 21/2

volume = 4/3π(21/2)³

As 1cm³ = 10⁻³l

So, Volume = 4/3π(21/2)³ × 10⁻³ l

Mass = {1.18 × 4/3 × 3.14 × (21/2)³ × 10⁻³}g

Mass = 5.71g

Number of atoms = (mole × Avogadro's number)

= (5.7/4 × 6.02×10²³)

= 8.57×10²³ atoms

Therefore a balloon of 21cm diameter can hold 8.57×10²³ He atoms.

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Answer:

Probably because chapstick can't really harm you and plus chapstick is used for dry crusty lips so why can't it be used for dry crusty hands and other parts of your body.

Explanation:

I saw that it could be used as lotion for small areas of dry skin like elbows or something but not full arms and legs.

Lotion is made to absorb into skin (that's why it's a liquidy substance), compared to chapstick thats made to lock in moisture on your lips (that's why it's a waxy stick). if you were to rub a bar of chapstick all over your arms and legs it wouldnt absorb nicely, and would leave your skin with a sticky waxy feeling.

2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams. Density is the mass of a specific material per unit volume.

Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram per square centimeter, but Earth has a density of 5.51 kilograms per cubic centimetre.

Density is sometimes measured in kilos per cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilos per cubic metre. 

density = mass / volume

            =53/ 20

            =2.65g/ml

Therefore, 2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams.

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The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions.Examples of elements include iron, copper, hydrogen and oxygen. Examples of compounds include water (H2O) and salt (Sodium Chloride - NaCl).

An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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Answer:1950s-1960s

Explanation:

Cobalt-60 is a radioactive isotope of cobalt that has a half-life of 5.27 years and decays by beta decay to nickel-60. It is commonly used in radiation therapy for cancer treatment and is also used as a source of gamma rays for industrial applications such as sterilization of medical equipment and food preservation. Cobalt-60 was first discovered in 1939 by Glenn T. Seaborg and John Livingood, and its potential for medical and industrial applications was quickly recognized. However, its widespread use did not occur until the 1950s and 1960s, when the technology for producing and handling radioactive sources became more advanced and the benefits of using cobalt-60 were more widely understood. Today, cobalt-60 remains an important tool in medical and industrial settings for its ability to deliver precise doses of radiation and its efficiency in sterilization processes.

Gauss's law and the sum of electric fields we can find that the variation of the force has as response:

the electric field is a vector field that indicates the force on a point test charge

Gauss's law is a method to calculate the electric field when the charges have some symmetric

             Фl =∫ E. ds = \(\frac{q_{int}}{\epsilon_o}\)

The bold letters indicate vectors, fi is the electric field flux, E the field value and ds the area differential of a Gaussian surface.

The Gaussian surface is an imaginary surface at the point where the field is calculated, the shape of this surface should be selected to simplify calculations.

In this case suppose that the plates are very large, so the Gaussian surface is a cylinder with the base parallel to the plane. For this surface the normal is parallel to the field lines so the scalar product is reduced to the algebraic product

             2E A =  \(\frac{q_{int}}{\epsilon_o}\)  

The number two is due to the fact that the field is emitted towards both sides of the plate, if we use the concept of surface density

               σ = \(q_{int}\) / A

                \(q_{int}\) = σ A

              2 E A = σ A / ε₀

                E = \(\frac{\sigma }{2 \epsilon_o }\)

in the case of the plate with a positive charge the field leaves the plate and in the case of the negative plate the field enters the plate, we can see that the two fields point in the same direction so they must be added

              E_ {total} = 2 E

              E_ {total} = \(\frac{\sigma }{\epsilon_o}\)  

The electric force is

                  F = q E

                  F = q   \(\frac{\sigma }{\epsilon_o}\)

From this expression we see that the force is constant and does not change with the position of the cars

In conclusion, using Gauss's law and the sum of electric fields, we find that the answer is:

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Answer:

Explanation:

Se denomina espectro electromagnético a la distribución energética del conjunto de las ondas electromagnéticas. Referido a un objeto se denomina espectro electromagnético o simplemente espectro a la radiación electromagnética que emite (espectro de emisión) o absorbe (espectro de absorción) una sustancia. Dicha radiación sirve para identificar la sustancia de manera análoga a una huella dactilar. Los espectros se pueden observar mediante espectroscopios que, además de permitir ver el espectro, permiten realizar medidas sobre el mismo, como son la longitud de onda, la frecuencia y la intensidad de la radiación.

Diagrama del espectro electromagnético, mostrando el tipo, longitud de onda con ejemplos, frecuencia y temperatura de emisión de cuerpo negro.

El espectro electromagnético se extiende desde la radiación de menor longitud de onda, como los rayos gamma y los rayos X, pasando por la radiación ultravioleta, la luz visible y la radiación infrarroja, hasta las ondas electromagnéticas de mayor longitud de onda, como son las ondas de radio. Si bien el límite para la longitud de onda más pequeña posible no sería la longitud de Planck (porque el tiempo característico de cada modalidad de interacción es unas 1020 veces mayor al instante de Planck y, en la presente etapa cosmológica, ninguna de ellas podría oscilar con la frecuencia necesaria para alcanzar aquella longitud de onda), se cree que el límite máximo sería el tamaño del Universo (véase Cosmología física) aunque formalmente el espectro electromagnético es infinito y continuo.

The endothermic reaction PE diagram is characterized by higher energy products and lower energy reactants.

The Potential Energy (PE) diagram represents the potential energy of the reactants and products. The change in potential energy during a reaction is often an indicator of whether the reaction is endothermic or exothermic.Endothermic reactions are those that absorb energy from their surroundings, while exothermic reactions release energy into their surroundings. The potential energy diagram for an endothermic reaction is characterized by a higher energy of products than that of the reactants.In other words, the energy required to break the bonds in the reactants is less than the energy required to form bonds in the products. The reactants are at a lower energy level than the products on the potential energy curve. The graph of PE diagram for an endothermic reaction is as follows: Image depicting a PE diagram for an endothermic reaction. As a result, Option B represents a PE Diagram for an endothermic reaction.

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Answer:

Explanation:

7A 0.2

7B cork

7C  Yes because the lighter it is the more likely it will float

7D  Density is one of the fundamental scientific principles of life. It can describe any everyday object. Despite its significance, students often struggle to understand what it really is. Density is a measurement of how much space or volume is packed in an object or substance.

8   property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination.

THE ANSWER IS OPTION B.

B;SOIL FROM EROSION FILLS UP A POND

HOPE THIS HELP

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The findings of scientific investigation can be seen in four real-world situations:

Finding the answer to a topic through a variety of research techniques is the process of conducting a scientific investigation.

Thus, the findings of scientific investigation can be seen in four real-world situations:

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Answer:

2–methylpropene.

Explanation:

To successfully name the compound given in the question, we must observe the following:

1. Determine the functional group of the compound.

2. Locate the longest continuous carbon chain. This gives the parent name of the compound.

3. Identify the substituent group attached and locate it's position by giving it the lowest possible count.

4. Combine the above to obtain the name of the compound.

Now, let us determine the name of the compound. This is illustrated below:

1. The functional group of the compound is the double bond i.e the compound is an alkene.

2. The longest continuous carbon chain is 3 i.e propene since it is an alkene.

3. The substituent group attached is methyl i.e CH3. In this case, we'll start counting from the side of the double bond being the functional group. Therefore, the methyl group i.e CH3 is at carbon 2.

4. Therefore, the name of the compound is:

2–methylpropene

The name of the compound in the attached image is; 2-methyl propene

Among the rules for Naming organic compounds is to identify the longest carbon chain containing the dominant function group (in this case alkene).

Hence, the base compound is propene.

However, the structure is branched on the 2nd carbon atom and attached is a methyl group.

Ultimately, the name of the compound is; 2-methyl propene

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Answer:

Try this for answer 3082.24

The chemical formula for the product.

(a)Orbital diagram for Li:

1s² 2s¹

Orbital diagram for S:

1s² 2s² 2p⁶ 3s² 3p⁴

Lewis structure for Li:

Li: [Li]+

Lewis structure for S:

:S:::S:

Combination of Li and S:

Li₂S

(b)

Orbital diagram for Ca:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Orbital diagram for Cl:

1s² 2s² 2p⁶ 3s² 3p⁵

Lewis structure for Ca:

Ca: [Ca]²⁺

Lewis structure for Cl:

:Cl:

Combination of Ca and Cl:

CaCl₂

(c)

Orbital diagram for K:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

Orbital diagram for Cl:

1s² 2s² 2p⁶ 3s² 3p⁵

Lewis structure for K:

K: [K]+

Lewis structure for Cl:

:Cl:

Combination of K and Cl:

KCl

(d) Orbital diagram for Na:

1s² 2s² 2p⁶ 3s¹

Orbital diagram for N:

1s² 2s² 2p³

Lewis structure for Na:

Na: [Na]+

Lewis structure for N:

:N:::N:

Combination of Na and N:

Na₃N

An orbital diagram is a visual depiction of the electrons located in an atom's or molecule's orbitals. Each electron is represented by an arrow, while each orbital is illustrated by a line.

The two electrons in each orbital's two lines are drawn in pairs to represent their opposing spins. Lewis structures, on the other hand, are schematics that display the interactions between the atoms in a molecule as well as any potential lone pairs of electrons.

Each atom's valence electrons are shown as dots, and the connections between atoms are shown as lines. The kind of bond that can be created between two elements depends on the number of valence electrons.

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Answer:

An alcohol is an organic compound with a hydroxyl (OH) functional group on an aliphatic carbon atom. Because OH is the functional group of all alcohols, we often represent alcohols by the general formula ROH, where R is an alkyl group. Alcohols are common in nature.

Explanation:

Answer

B. Oil is nonpolar, but water is polar.

Explanation

Water is held together by hydrogen bonds. Hence water is a polar molecule. Oils and fats do not have any polar part and so for them to dissolve in water they would have to break some of water hydrogen bonds.

So, non-polar molecules (e.g oil) can only mix well with other non-polar molecules and not with polar molecules like water. Therefore, this explains why oil doesn't mix well with water.

The correct answer is: B. Oil is nonpolar, but water is polar.

The electronic configuration of the chlorine atom can be written as 2, 8 , 7

The positioning of electrons within an atom's or molecule's orbitals is referred to as its electronic configuration. Around the atomic nucleus of an atom, electrons—negatively charged subatomic particles—occupy various energy levels or shells.

The electrons in an atom fill these energy levels or shells in a certain order in accordance with a series of laws known as the Aufbau principle, Pauli exclusion principle, and Hund's rule. Each energy level or shell has a maximum capacity for electrons.

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Answer:

It is a combustion reaction

Explanation:

I'm not sure about the number, but for sure it's a combustion reaction because the products are water and co2.

Mendeleev sketched out the table he had in mind. Mendeleev created the so-called Periodic Law while assembling these atomic data cards.

Periodic law is defined as a rule that the elements fall into recurrent groupings when enumerated in order of their atomic numbers, causing elements with similar qualities to appear frequently. "The physical and chemical properties of the elements are periodic functions of their atomic numbers," is how the current Periodic law is best summarized.

Mendeleev found that when all the known chemical elements were arranged in order of increasing atomic weight, the resulting table revealed a periodicity, or repeated pattern, of characteristics within groupings of elements.

Thus, Mendeleev sketched out the table he had in mind. Mendeleev created the so-called Periodic Law while assembling these atomic data cards.

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This is the element Silicon.

=========================================================

Explanation:

First convert each percentage to its decimal form.

For example, 92.2297% converts to 0.922297 after moving the decimal point two spots to the left.

After doing that, multiply those decimal values with their respective atomic mass unit (amu) values.

Then we add up the results

25.8030109393 + 1.357027448 + 0.9253511536 = 28.0853895409

That rounds to about 28.085

Then look at the periodic table to see the atomic mass of Cobalt (Co), Aluminum (Al), Nickel (Ni) and Silicon (Si). The mass values listed in the periodic table are weighted averages of all the isotopes. The units for the mass are still in amu.

We have a match with silicon, showing that choice D is the final answer.

The energy of an orange lamp with a frequency of 5.10 x 10¹⁴ Hz is 5.88 x 10⁻⁷ is 3.38 x 10⁻¹⁹ J.

Frequency is defined as the number occurrences of repeated events per unit of time. SI unit is hertz (Hz).

Using the formula,

                    E = hν

where,

E = energy in joules (J)

h = Planck's constant =  6.63 x 10⁻³⁴ Js

ν = frequency in hertz

Given :

frequency = 5.10 x 10¹⁴ Hz

h = 6.63 x 10⁻³⁴ Js

Putting the values,

E = (6.63 x 10⁻³⁴) x (5.10 x 10¹⁴) J

E = 3.38 x 10⁻¹⁹ J

Therefore, the energy of an orange lamp with a frequency of 5.10 x 10¹⁴ is  3.38 x 10⁻¹⁹J.

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The pressure of hydrogen gas exert before its volume was decreased is equal to 3.68 atm.

Boyle’s law states that the pressure exerted by a given mass of gas is inversely proportional to the volume occupied by it when the temperature of the gas remains constant.

The pressure (P) and volume (V) have an inverse relationship to each other as long as the temperature is kept constant.

P ∝ 1/V

or

P₁V₁ = P₂V₂                                        ................(1)

Given, the final pressure of the hydrogen gas,  P₂ = 9.67 atm

The initial volume of the hydrogen gas, V₁ = 10.84 L

The final volume of the hydrogen gas, V₂ = 4.13 L

Substitute volume and pressure in equation (1) to get the initial pressure:

P₁ × (10.84 L) = (9.67 atm) × 4.13

P₁ = 3.68 atm

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Answer: 2.40 X10^24

Explanation: Utilizing Avogadro's Number of 6.022 X 10^23

112gSi X 1molSi/28.09gSi X 6.022 X 10^23/1molSi = 2.40 X 10^23