How many electrons are represented by a dash (-) in a lewis dot structure compound

Answer:

Explanation:

Work is the result of applying a force that manages to move a mass.

Thus, the work (mechanical work in this case because this is a mechanical force, not an electrical one) applied by a constant force is the product of the force times the distance that the object is moved.

Also, you can calculate the mechanical work as the difference in the mechanical energy between the initial and the final stages of the event where the force was applied.

Let's see each choice:

a) Holding a mass for 1 hr: since no translation is involved, displacement is and the work is zero.

b) Holding 1 kg mass: again, no motion is involved, so there is no work.

c) Moving 1 m in 1 hr: there is not force involved in this statement, so there is not work.

d) lifting a 1 kg mass 1 m: this, indeed, describes a situation where work results from applying a lifting force to move a mass 1 m up.

In this case, such work is equal to the change in the potential energy of the mass: mgΔh = 1kg × 9.8m/s² × 1 m = 9.8 joules.

Answer:

D lifting a 1 kg mass 1 m

Explanation:

Took the test and got 100%

Answer:

According to Brittanica, "Internal energy [is] the property or state function that defines the energy of a substance in the absence of effects due to capillarity and external electric, magnetic, and other fields."

Answer:

The empirical formula is V₂O

Empirical formula of a compound is the formula that shows the simplest whole number ratio of the atoms of elements in a given compound. Empirical formula is normally calculated when the mass of each element in a compound is known or the percentage composition by mass of each element in a compound is known.

Step by Step Explanation:

Step 1: Percentage composition of each element

Percentage composition=(mass of an element/ mass of the compound)100%

Mass of Vanadium = 20.38 g

Mass of the compound = 23.58 g

% composition of Vanadium = (20.38 g/23.58 g) 100%

                                                 = 86.43 %

Mass of Oxygen = 23.58 g -20.38 g

                           = 3.2 g

% composition of oxygen = (3.2/g/23.58 g) 100%

                                          =  13.57%

Step 2: Find the number of atoms of each element in the compound

Number of atoms  = percentage composition/ atomic mass

Atomic mass of Vanadium = 50.94 g/mol

Number of atoms of V = 86.43 /50.94

                                  = 1.6967

Atomic mass of oxygen = 16 g/mol

Number of atoms of O = 13.57/16

                                      = 0.8481

Step 3:  Find the simplest ratio of atoms

Vanadium : Oxygen

            1.6967 : 0.8481

= 1.6967/0.8481 : 0.8481/0.8481

= 2: 1

Whole number ratio = 2 : 1

Therefore; the empirical formula is V₂O

Answer:

[tex]V_2O[/tex]

Explanation:

Hello,

In this case, for the given vanadium oxide we have the general formula:

[tex]V_XO_Y[/tex]

Whereas both X and Y are determined as shown below:

- Find the mass percentage of both vanadium and oxygen:

[tex]\% V=\frac{20.38g}{23.58g}*100\%=86.43\% \\\% O=\frac{23.58g-20.38g}{23.58g}*100\%=13.57\%[/tex]

- Then the representative moles:

[tex]n_V=\frac{86.42}{51}=1.695\\n_O=\frac{13.57}{16}=0.8482[/tex]

- Finally X and Y:

[tex]X=\frac{1.695}{0.8482}=2\\\\Y=\frac{0.8482}{0.8482}=1[/tex]

Thus, the empirical formula is:

[tex]V_2O[/tex]

Best regards.

Answer:

Decomposition Reaction

Explanation:

If you are referring to what type of reaction that occurred then the answer would be decomposition reaction.

This is a chemical reaction where one reactant is broken down into two or more products.

REACTANT → PRODUCT

       AB       →      A + B

The products can be two or more elements or two or more compounds, depending on what was decomposed.

Answer:

decomposition on edg

Explanation:

Answer:

5.555.

Explanation:

∵ pH = - log[H⁺],

[H⁺] for weak acids = √Ka.C.

Ka for CH₃COOH = 1.74 x 10⁻⁵, C = 0.16 M.

∴ [H⁺] = √Ka.C = √(1.74 x 10⁻⁵)(0.16 M) = 2.784 x 10⁻⁶ M.

∴ pH = - log[H⁺] = - log(2.784 x 10⁻⁶ M) = 5.555.

Answer:

Mercury

Chemical element

Symbol: Hg

Explanation:

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Answer:

you can probably find that on google.

Explanation:

Answer:

110 celcius

Explanation:

(230- 32) · 5/9= 110

Answer:

Boiling point in degrees celsius = 356.4 (approximately 356 C)

Explanation:

Given:

Temperature = 230 Fahrenheit (F)

To determine:

The temperature in units of degrees celsius

Calculation:

Convert temperature from degrees celsius to degrees fahrenheit using the following formula:

[tex]C = (F-32)*1.8\\\\C = (230-32)*1.8 = 356.4[/tex]

Answer: Sulfur is the oxidizing agent and bromine is the reducing agent.

Explanation:

Oxidation reaction is defined as the reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

[tex]X\rightarrow X^{n+}+ne^-[/tex]

Reducing agents are defined as the agents which reduces the other substance and itself gets oxidized. These agents undergoes reduction reactions.

Reduction reaction is defined as the reaction in which an atom gains electrons. Here, the oxidation state of the atom decreases.

[tex]X^{n+}+ne^-\rightarrow X[/tex]

Oxidizing agents are defined as the agents which oxidize other substance and itself gets reduced. These agents undergoes reduction reactions.

For the given chemical reaction:

[tex]2HBr+H_2SO_4\rightarrow SO_2+Br_2+2H_2O[/tex]

The half reactions for the above reaction are:

Oxidation half reaction:  [tex]2Br^-\rightarrow Br_2+2e^-[/tex]

Reduction half reaction:  [tex]S^{+6}+2e^-\rightarrow S^{+4}[/tex]

From the above reactions, bromine is loosing its electrons. Thus, it is getting oxidized and is considered as a reducing agent.

Sulfur is gaining electrons and thus is getting reduced and is considered as an oxidizing agent.

Hence, sulfur is the oxidizing agent and bromine is the reducing agent.

Final answer:

In the reaction HBr + H₂SO₄ → SO₂ + Br₂ + H₂O, HBr is the reducing agent as it is oxidized to Br₂, and H₂SO₄ is the oxidizing agent as it is reduced to SO₂.

Explanation:

In the reaction HBr + H₂SO₄ → SO₂ + Br₂ + H₂O, you are tasked with identifying the oxidizing agent and the reducing agent. In this chemical reaction, hydrogen bromide (HBr) is being oxidized to bromine (Br₂) as it loses electrons. This makes HBr the reducing agent. On the other hand, concentrated sulfuric acid (H₂SO₄) is a powerful oxidizing agent and is reduced to sulfur dioxide (SO₂), making it the oxidizing agent.

Answer:H=2 I=2 J=2

Explanation:

Answer:

H= 2

I= 2

J=2

Explanation:

Just did this answer on ingenuity. :)

Hello There!

According to "Newton's First Law" an object at rest will begin to move when it is acted upon an unbalanced force.

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The atom having 5 as the atomic number, and 11 has the mass number have 5 protons. Thus, option A is correct.

In an atom, the nuclei consists of protons and neutrons. The sum of the protons and neutrons in an atomic nuclei determines its mass number.

The atomic number of an atom is the number of protons in an atom. Thus, the number of protons in an atom in 5. Hence, option A is correct.

Learn more about mass number, here:

https://brainly.com/question/4408975

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Answer:

The new volume of this gas is 6.86 liters.

Assumption: the temperature of this gas stays the same, and this gas is ideal such that Boyle's Law applies.

Explanation:

By Boyle's Law, the volume of an ideal gas shall be inversely proportional to the pressure on it when temperature stays the same (as in an isothermal process.)  

In other words,

[tex]\displaystyle V \propto \frac{1}{P}[/tex],

where

[tex]P_1 \cdot V_1 = P_2 \cdot V_2[/tex].

[tex]\displaystyle V_2 = \frac{P_1 \cdot V_1 }{P_2}[/tex].

Assume that this gas is ideal. Also assume that this increase in pressure is isothermal. Apply Boyle's Law to find the new volume of this gas:

[tex]\displaystyle V_2 = \frac{P_1 \cdot V_1 }{P_2} = \rm \frac{0.98\;atm \times 10.5\; L}{1.50\; atm} = 6.86\; L[/tex].

Answer:

211.9 J

Explanation:

The molecules of water release heat during the transition of water vapor to liquid water, but the temperature of the water does not change with it.

The amount of heat released can be represented by the formula:

[tex]Q=mL_e[/tex]

where [tex]Q[/tex] = heat energy, [tex]m[/tex] = mass of water and [tex]L[/tex] = latent heat of evaporation.

The latent heat of evaporation for water is [tex]L=2257 kJ/kg[/tex] and the mass of the water is [tex]m=93.9 g=0.0939 kg[/tex].

The amount of heat released in this process is:

[tex]Q=mL_e = (0.0939kg)(2257 kJ/kg)=[/tex] 211.9 J

Answer:

26.73 mg.

Explanation:

no. of moles of magnesium chlorate (Mg(ClO₃)₂) = mass/molar mass = (72.03 mg)/(191.21 g/mol) = 0.377 mmol.

Every 1.0 mole of magnesium chlorate (Mg(ClO₃)₂) contains 2.0 moles of Cl.

∴ The no. of moles of Cl in magnesium chlorate (Mg(ClO₃)₂) = 2(0.377 mmol) = 0.754 mmol.

∴ The mass of Cl are found in 72.03 mg of magnesium chlorate (Mg(ClO₃)₂) = (no. of moles of Cl)(atomic mass of Cl) = (0.754 mmol)(35.453 g/mol) = 26.73 mg.

Answer:

Arrhenius acid

Explanation:

The arrhenius theory conceptualizes an acid as a substance that interacts with water to produce excess hydroxonium ions in an aqueous sloution. Hydroxonium ions results when the oxygen atom of water chemically bonds with the protons released by the acid.

An arrehnius base interacts with water to yield excess hydroxide ions in an aqueous solution.

A Bronsted-Lowry base as a proton acceptor.

A Bronsted-Lowry acid is a proton donor.

Answer:

b

Explanation:

Answer:

The electron transport chain consists of a series of redox reaction in the form of complex I, Q, complex II and III.

1- complex I establishes hydrogen gradient across the matrix by transferring two hydrogen ions plus its uses FMH as a cofactor.

2- In Q and complex II series, Q is reduced by NADH into QH2 and this complex receives FADH2 which delivers electrons to ETC.

3- The third complex is composed of cytochrome b and c.It also transfers protons to the fourth complex.

4- The Fourth complex contains cytochrome proteins c, a, and a3. It reduces oxygen which picks up the protons to form water.

Overall series of reactions in ETC:

NADH+H+ → Complex I → Q → Complex III → cytochrome c → Complex IV  → H2O

                     ↑

                 Complex II  

                     ↑

                 Succinate  

Respiratory chain:

1- Hydrogen is obtained by the reduction of NADH and from FADH.

2- The electrons are transferred to complexes I, II and III and then to oxygen.

3- After this complexes, I, II and III expel protons across the membrane.

4- These protons are then used to synthesize ATP.

Final answer:

The electron transport chain, also known as the respiratory chain, is a series of oxidation-reduction reactions that transfer electrons from substrates to molecular oxygen. It is located in the inner mitochondrial membrane in eukaryotes and the plasma membrane in prokaryotes. The energy released during the electron transfer is used to pump hydrogen ions across the membrane, creating a proton gradient that drives the synthesis of ATP.

Explanation:

The electron transport chain (ETC) or respiratory chain is a series of oxidation-reduction reactions that transfer electrons from substrates to molecular oxygen. It is located in the inner mitochondrial membrane in eukaryotes and the plasma membrane in prokaryotes. The ETC consists of four protein complexes, labeled I through IV, and associated mobile electron carriers. As electrons are passed through the chain, they lose energy, and this energy is used to pump hydrogen ions across the membrane, creating a proton gradient. The final electron acceptor is molecular oxygen, which is reduced to water. The ATP formed during this process is known as oxidative phosphorylation.

Answer:

ph paper, or a ph meter

Explanation:

Answer:

Measure H+ concentration or measure OH- concentration

Explanation:

Since pH is basically the number of H+ ions in a solution, that's what you're trying to find. (it's actually -log of H+, which is irrelevant since this is a conceptual question). You can do this with a variety of chemicals.

And p,OH is always 14-pH. So you can also use the number of OH- ions to find p,OH, which can find pH.

hope this helps

Answer:

Water has a strong hydrogen bond which is absent in carbon (IV) oxide.

The net forces of attraction between water molecules is greater than the kinetic energy thus water molecules cannot move far away from each other but slide over each other.

Carbon (IV) oxide molecules are held together by weak Van der waals forces which are overcome by the kinetic energy of the molecules. This makes the molecules move easily in random directions.

Answer:

The particles in the H2O liquid are more attracted to each other.

Explanation:

just got it right in study Island

Answer:

The correct answer for this is: [tex] O _ 3 [/tex].

Explanation:

It is in a molecule of O3 that the two electron dot structures describe the bond equally well.

The [tex] O _ 3 [/tex] molecule is called trioxygen and more commonly known as ozone. It is a pale blue colored gas having a strong pungent smell.

This inorganic molecule is widely used in the oxidation process in the industries as well as consumer application.

Hello There!

If this happens, the molecules collide less frequently.

the molecules collide less frequently

Explanation:

a p e x trust me

Answer:

y=108.45

0.66y=0.9x+0.48

0.66*108.45 =0.9x+0.48

71.577=0.9x+0.48

71.577-0.48=0.9x

71.097=0.9x

x=71.097/0.9

x=78.99667

The equation has a quadratic relationship, since the equation has K and P. This indicates that its Non-linear equation but quadratic.

Hope This Helps!!!

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Answer:

An inverse proportion

Explanation:

Answer:

less than the reactants

Explanation:

Since the reaction is exhotermic, meaning that they have already released energy in the bonding, the product is releasing heat energy, and the reactants were not, so the products would have less bonding energy than the reactants.

Answer:

C. two or more producers are trying to sell the same good or service to the same consumers.

Explanation:

APEX

Charles's law states that the volume of a gas is directly proportional to its Kelvin temperature when the pressure is constant.

Charles's law states that the volume of a given amount of gas is directly proportional to its temperature in the Kelvin scale, as long as the pressure remains constant.

We can express this relationship mathematically as V/T = constant, where V is the volume and T is the temperature in Kelvin.

In summary, Charles's Law helps us understand how gases behave under different temperatures, making it an important principle in the study of gases and their properties.

Answer:

The mass of the pasta increases and the water evaporated and the mass decreases

Explanation:

Explanation:

When we want to boil pasta, we put water in a pan and place it on stove and wait for it till boiling. Then we can optionally put salt and a bit of oil in the boiling water in order to make pasta remain separate from each other and don't get stick. Then pasta is put in the boiling water. After 4 to 8 minutes of boiling pasta, the pasta expands and the mass of it gets bigger. It occupies more space after boiling. The water evaporates due to boiling, which is the natural common process.

Answer: Plant growth, animal actions and pressure release

Explanation:

The weathering is a process of disintegration of rocks into small pieces and sediments. This is caused by chemical or physical agents.

Mechanical weathering is also called as physical weathering. It is caused by the physical activities on the surface of rocks. The following are the examples of mechanical weathering.

1. Plant growth: The plants which grows over the surface of rocks, their roots may penetrate the rocks which causes the disintegration or rocks.

2. Animal actions: The animals may exert their pressure over the surface of rocks. They may create burrows like rat or mice inside the rocks.

3. Pressure release: The rock which was under pressure, instantly if pressure released, the structure of rock will become unstable, this may lead to the disintegration of the rock.

Answer:

1.) The aluminum block

2.) more than the nail it came from

3.) Rust contains iron and oxygen

Explanation:

1.)

Mass, Density, and Volume are related by the following equation;

Mass = Volume*Density

Solving for volume;

Volume = Mass/Density

If Mass is constant then;

Volume ∝ 1/Density ; That is volume and density will be inversely proportional. The larger the volume the smaller the density

2.)

If an iron nail were allowed to rust completely, you should find that the rust weighs more than the nail it came from since Iron combines with oxygen and water from the air to form rust.

3.)

Rust contains iron and oxygen.

Rust is composed or made up of hydrated iron(III) oxides Fe2O.

Final answer:

Gravity is an ever-present, attractive force that holds together the Universe, from maintaining our footing on Earth to influencing the motions of galaxies and beyond. It is defined by Newton's law of gravitation and further explored in the theory of general relativity.

Explanation:

Gravity is a fundamental force of nature that is always attractive, causing objects with mass to be pulled toward each other. Even though gravity is the weakest of the four fundamental forces, it plays a crucial role in structuring the Universe. From binding us to the surface of Earth to keeping planets in orbit around the Sun, and even holding galaxies together, gravity is essential for the existence and movement of celestial bodies. Newton's universal law of gravitation states that gravitational force is directly proportional to the masses of the objects involved and inversely proportional to the square of the distance between their centers. On a cosmic scale, gravity is the dominant force and is important for understanding the interactions of matter in space and time. Additionally, in the realm of general relativity, gravity is responsible for curving space and altering the flow of time near massive bodies like stars.

It convert carbon monoxide faster

Answer: The correct answer is it converts carbon monoxide faster.

Explanation:

Catalyst is defined as the substance which increases the rate of the reaction without getting actually participated in the reaction. It can be easily regenerated at the end of the reaction.

For the given chemical reaction:

[tex]2CO+O_2\rightarrow 2CO_2[/tex]

Addition of catalyst will lead us to the production of carbon dioxide faster or it may convert carbon monoxide faster into the products.

Hence, the correct answer is it converts carbon monoxide faster.