Neec help please :)

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 75 × 8

We have the final answer as

Hope this helps you

Answer:

His conclusion is wrong

Explanation:

Now we must know that there are various rate laws.

In a zero order rate law, the rate of reaction is independent of the initial concentration of reactants. Hence varying the initial concentration of the reactants results in no change of the rate of reaction.

In first and second order rate laws, the rate of reaction varies with the concentration of one or two reactants in either case respectively.

Having said these, the student does not need to change the temperature but rather designate the reaction as zero order. The rate of reaction is independent of the initial concentration of reactants.

Answer:

C₆H₁₂O₆ + 6O₂ —> 6CO₂ + 6H₂O

Explanation:

Glucose (C₆H₁₂O₆) react with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O).

The equation can be written as follow:

C₆H₁₂O₆ + O₂ —> CO₂ + H₂O

The above equation can be balance as illustrated below:

C₆H₁₂O₆ + O₂ —> CO₂ + H₂O

There are 6 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 6 in front of CO₂ as shown below:

C₆H₁₂O₆ + O₂ —> 6CO₂ + H₂O

There are 12 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 6 in front of H₂O as shown below:

C₆H₁₂O₆ + O₂ —> 6CO₂ + 6H₂O

There are a total of 8 atoms of O on the left side and a total of 18 atoms on the right side. It can be balance by 6 in front of O₂ as shown below:

C₆H₁₂O₆ + 6O₂ —> 6CO₂ + 6H₂O

Now, the equation is balanced.

Answer: D

Explanation:

The personal data are transmitted using digital signals. The data might be stolen or accessed by hackers to go wrong with these transmissions. Therefore, option D is correct.

A digital signal is one that can only ever take on one of a few discrete values at any given time. It represents data as a sequence of discrete values.

A continuous signal that represents physical measurements is an analog signal. Digital modulation is used to create time-separated signals known as digital signals. Sine waves serve as its signal. The square waves serve as a marker.

It makes use of a continuous range of values to aid in the representation of data. Digital technologies are any techniques, systems, equipment, or resources that produce, store, or process data electronically.

Thus, option D is correct.

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Answer:

Adding heat and increasing concentration are meant to cause an increase in the rate of a reaction

Explanation:

The rate of a chemical reaction is defined as the number of moles of reactants converted or products formed pee unit time. It is a measure of how quickly the reactants in a given reaction are used up to form products or how quickly products are formed from reactants.

Factors that affect the rate of a chemical reaction include:

1. Nature of reactants

2. Concentration/pressure (for gases) of reactants

3. Temperature of reaction mixture

4. Presence of light

5. Presence of a catalyst

The effect of increasing the concentration of reactants for a given chemical reaction is that the reaction rate will increase. This is so because, according to the collision theory of chemical reactions, the frequency of collision between reactant particles which results in a chemical reaction (effective collisions) will increase when the reactant particles are crowded together in a small space due to an increase in their concentration.

The effect of increasing temperature or adding heat to a reaction is that the reaction rate increases. When the heat is added to a reactant particles, the number of particles with energies greater than or equal to the activation energy (the minimum amount of energy that reactant particles must possess for effective collisions) increases. Also, the average speed of the reactant particles increases resulting in a greater frequency of collision. Hence, the rate of the chemical reaction increases.

Answer:

[tex]n_{Al}=6.00molAl\\\\n_{S}=9.00molS\\\\n_{O}=36.0molO[/tex]

Explanation:

Hello!

In this case, when analyzing the moles of an element inside a compound, we need to keep in mind that a mole ratio should be set up; thus, for aluminum sulfate, we have the following ones:

[tex]\frac{2molAl}{1molAl_2(SO_4)_3} \\\\\frac{3molS}{1molAl_2(SO_4)_3} \\\\\frac{12molO}{1mol1molAl_2(SO_4)_3}[/tex]

Thus, starting by 3.00 moles of aluminum sulfate, the moles of each element turn out:

[tex]n_{Al}=3.00molAl_2(SO_4)_3*\frac{2molAl}{1molAl_2(SO_4)_3} =6.00molAl\\\\n_{S}=3.00molAl_2(SO_4)_3*\frac{3molS}{1molAl_2(SO_4)_3} =9.00molS\\\\n_{O}=3.00molAl_2(SO_4)_3*\frac{12molO}{1molAl_2(SO_4)_3}=36.0molO[/tex]

Best regards!

Answer:

The Earth’s lithosphere, which includes the crust and upper mantle, is made up of a series of pieces, or tectonic plates, that move slowly over time.

A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge and Pacific Ring of Fire are two examples of divergent plate boundaries.

Answer: Divergent

Explanation: im pretty sure its a multiple choice question

Answer:

the mass of the glass is 2

Answer:

a element

Explanation:

In science copper is a element. It is one of the transition metals found on the periodic table of elements.

Elements are distinct substances that cannot be split-up into simpler substances. Such substances consist of one kind of atom.

There are over a hundred elements that are known till date.

Each elements combines to form a compound

Answer:its an element

Explanation:

Answer:

V₂ =1.99 L

Explanation:

Given data:

Initial volume = 1.8 L

Initial temperature = 28°C (28+273.15 K= 301.15 k)

Initial pressure = 102 KPa

Final volume = ?

Final pressure = 85 KPa

Final temperature = 4°C (4+ 273.15 K = 277.15 K)

Solution:

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

V₂ = 102 KPa × 1.8 L × 277.15 K / 301.15 K × 85 KPa

V₂ = 50884.74 KPa .L. K / 25597.75 K.KPa

V₂ =1.99 L

Answer:

the answer is potential energy

Explanation:

Answer: potential energy

Explanation:

Answer:

B

Explanation:

Answer:

1.602 moles CO

Explanation:

To convert from liters to moles, divide by 22.4:

35.88 L / 22.4 = 1.602 moles CO

Answer:

D.

Explanation:

I did this question in school and got it right.

Answer:

The answer to your question is when the size, shape, or state of matter changes.

Explanation:

Change that does not undergo in the chemical composition.

Answer:

1.A lantern has a candle or fuel cell which heats the air and this hot air fills the sky lantern. The consequence of this is that the lantern rises in the air. This happens because the hot air inside the lantern is lighter than the cool air surrounding it. ... This fuel cell is lit before the lantern is launche

2.Whenever something becomes warmer, the kinetic energy of its atoms or molecules has increased. When matter gets warmer, the atoms or molecules in the matter move faster. It's easy to increase the kinetic energy in matter.

Which group of elements is considered the most reactive non-metals?

D. Noble Gases

The halogens will be considered the most reactive non-metals.

The halogens are just a group of 4 - 6 individual  elements in a particular periodic table.

A nonmetal is just a chemical element which lacks the majority of properties associated, ranging from colorless gases to gleaming, high-melting-temperature  of the solids.

Each outer shell includes seven electrons, hence group 7 metals would have to gain 1 extra electron to achieve a full outer shell of electrons. When we proceed up the group, this allows us to draw one electron, making it much more reactive.

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Answer:

The anwser to this problem is C :)

Explanation:

The compounds can be classified as C. as either reactants or products, depending on the rate that photosynthesis occurs.

Based on the information given, in the light-dependent reactions, light strikes the oval thylakoids. Also, as compound A enters the thylakoid, compound B leaves it, and compound C enters a cycle in the stroma, and sugars leave the cycle.

It can be deduced that the compounds can be classified as either reactants or products, depending on the rate at which photosynthesis occurs.

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Answer:

Endothermic reactions is the result of heat being absorbed.

Explanation:

Melting ice cubes. Melting solid salts. Evaporating liquid water. Converting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processes.

(These are all examples of endothermic reactions.)

Answer:

ACE

Explanation:

Defined skill set: When we say advantages it is seen that it can be visualized during the early stages of one’s career.

Upward growth: Having a specific skill or being specialized in that work would also bring growth in that division. ...

Good package: A job specialization means a person is knowing how to do that work and complete it.

Answer:

the mass numder of atoms is called atomic mass

Answer:

12.5%

Explanation:

Given data:

Volume/Volume % = ?

Volume of solute = 25 mL

Volume of solution = 200 mL

Solution:

Formula:

v/v% = ( volume of solute / volume of solution ) × 100

by putting values,

v/v% = ( 25 mL / 200 mL)  × 100

v/v% = 0.125  × 100

v/v% = 12.5%

Answer:

Green.

Explanation:

Only the particles that hit the nucleus of the atom bounced off.

Answer:

You would put the 4 quantum numbers corresponding to the electrons being described above

Explanation:

Quantum numbers refer to electrons, so I'll assume you mean the electron number that would correspond with the atomic number of the element. Quantum numbers are basically like an address for electrons, giving us information about the location of an electron from most general to most specific.

The quantum selection rules allow finding the results for the quantum numbers for each electrons are:

          1. n = 5, f l = 3 el m = 1

           The quantum number of spin. Opposite the first electrons.

         2. n = 4, l = 2, m = 0  

             Spin opposite the first electrons.

        3. n = 4, l = 1, m = 0

            Spin number opposite the first electrons.

        4. n = 3, l = 1, m = 1

            Spin all electrons have the same spin.

         5. n = 7, l = 2, m = 0

             Spin quantum number two electrons with opposite spin.

The solution of the Scrodinger's equation in three dimensions results have  three constants related, these constants are called quantum numbers.

In independent experiments, a fourth quantum number called the spin magnetic moment was found, it can have two values ​​+ ½ and - ½

The rules for valid combinations ​​of these quantum numbers are called selection rules, the spectroscope notation for each electron is.

         [tex]n l ^m[/tex]

Where n is the principal number, l the orbital and m the magnetic.

To determine the value of the spin quantum number, the Pauli exclusion principle is used, which establishes that you cannot have two fermions (electrons) in the same quantum state, this deteriorates that in a state there can only be two electrons, one with upward spin and the other spin down.

Let's find the combination of these constants for each case.

1. The 11th electron of level  5f¹⁴.

The principal quantum number n = 5

Orbital quantum number f,  l = 3

In the f orbital, a maximum of 14 electrons can be placed, since it has 7 sub-levels and according to the Pauli Exclusion principle, each one can have two electrons.

We place 1 electron in each sub-level and then we place a second electron with the opposite spin, therefore when we get to electron number 11 it has a spin opposite to that of the first 7 electrons, but there is no way to previously know its value.

we construct a table with the distribution of electrons.

Quantum number        Electrons

n = 5

          l = 0

          l = 1

          l = 2

          l = 3

                   m = -3           ½ - ½

                   m = -2           ½ - ½

                   m = -1             ½ - ½

                  m = 0              ½ - ½

                  m = 1               ½

                  m = 2              ½

                  m = 3              ½

With the help of this table the other numbers are:

Tthe magnetic quantum number is m = 1

The quantum number of spin. opposite the spin of the first electrons.

2. The eighth electron of the 4d¹⁰ state

Pricipal number n = 4

Orbital number l = 2

We construct a table with the distribution of electrons.

Quantum number        Electrons

n = 4

      l = 0

      l = 1

      l = 2

              m = -2                ½ - ½

              m = -1                 ½ - ½

              m = 0                  ½ - ½

              m = 1                  ½

              m = 2                 ½

With this table the other quantum numbers are;

Magnetic m = 0

Spin opposite the first electron

3. 5th electron of 4p⁶

Principal number n = 4

Orbital number p l = 1

We construct a table with the distribution of electrons.

 Quantum number        Electrons

   n = 4

           l = 0

           l = 1

                m = -1                    ½ - ½

                m = 0                    ½ - ½

               m = 1                       ½

Magnetic number m = 0

Spin number opposite the first electrons.

4. 15th electron of phosphorus

The electron configuration of phosphor is

        1s² 2s²2p⁶ 3s²3p³

Principal quantum number n = 3

Orbital quantum number p, l = 1

We construct the electron distribution table.

Quantum number        electrons

 n = 3

          l = 0

         l = 1

               m = -1                   ½

               m = 0                   ½

               m = 1                    ½

The other quantified numbers are:

Magnetic m = 1

Spin all electrons have the same spin.

5. The last electron of neptunium.

Electronic configuration.

 Radon Gas Configuration +  5f⁴6d¹ 7s²

Principal quantum number n = 7

Orbital quantum number l = 2

Magnetic quantum number m = 0

Spin quantum number two electrons with opposite spin.

In conclusion using the quantum selection rules can determine the quantum numbers for each given electron are:

        1. n = 5, f l = 3 el m = 1

           The quantum number of spin. Opposite the first electrons.

         2. n = 4, l = 2, m = 0  

             Spin opposite the first electrons

        3. n = 4, l = 1, m = 0

            Spin number opposite the first electrons.

        4. n = 3, l = 1, m = 1

            Spin all electrons have the same spin

         5. n = 7, l = 2, m = 0

             Spin quantum number two electrons with opposite spin.

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Answer:

Mitochondrion

Explanation:

took the quiz

Answer:

1. 5.24 g

2. 75.4%

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

MgCl₂ + Na₂SO₄ —> MgSO₄ + 2NaCl

Next, we shall determine the mass of MgCl₂ that reacted and the mass of MgSO₄ produced from the balanced equation. This can be obtained as follow:

Molar mass of MgCl₂ = 24 + (35.5×2)

= 24 + 71

= 95 g/mol

Mass of MgCl₂ from the balanced equation = 1 × 95 = 95 g

Molar mass of MgSO₄ = 24 + 32 + (16×4)

= 24 +32 + 64

= 120 g/mol

Mass of MgSO₄ from the balanced equation = 1 × 120 = 120 g

SUMMARY:

From the balanced equation above,

95 g of MgCl₂ reacted to produce 120 g of MgSO₄.

1. Determination of the ideal yield of magnesium sulfate, MgSO₄.

From the balanced equation above,

95 g of MgCl₂ reacted to produce 120 g of MgSO₄.

Therefore, 4.15 g of MgCl₂ will react to produce = (415 × 120)/95 = 5.24 g of MgSO₄.

Thus, the ideal yield of magnesium sulfate, MgSO₄ is 5.24 g

2. Determination of the percentage yield.

Actual yield of MgSO₄ = 3.95 g

Ideal yield of MgSO₄ = 5.24 g

Percentage yield =?

Percentage yield = Actual yield / Ideal yield × 100

Percentage yield = 3.95 / 5.24 × 100

Percentage yield = 395 / 5.24

Percentage yield of MgSO₄ = 75.4%

Answer:

Strike-Slip Fault

Explanation:

The scientist observes strike slip fault feature when rock masses that have moved past each other in opposite horizontal directions.

The feature that the scientist observes when rock masses move past each other in opposite horizontal directions is a strike-slip fault.

A strike-slip fault is a type of fault in which two rock masses slide past each other horizontally in opposite directions. This type of fault is caused by shearing forces, which cause the rock masses to move sideways against each other.

As a result, the rocks on either side of the fault can move in different directions, creating an offset in the landscape. Strike-slip faults can occur in various settings, including transform plate boundaries, where two tectonic plates slide past each other, and in areas of high seismic activity, where the Earth's crust is under a lot of stress.

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Answer:

[tex]\% \frac{A}{A_0}=75.9\%[/tex]

Explanation:

Hello!

In this case, since the kinetics of the radioactive decay is assumed to be first-order, it is possible to use the following equation to quantify that change:

[tex]\frac{A}{A_0} =2^{-\frac{t}{t_{1/2}}[/tex]

Thus, given the elapsed time, 635 years, and the half-life, 1599 years, we can compute the fraction of the present amount:

[tex]\frac{A}{A_0} =2^{-\frac{365years}{1599years}\\\\\frac{A}{A_0} =0.759[/tex]

Thus, the percent is:

[tex]\% \frac{A}{A_0}=0.759*100\%\\\\ \% \frac{A}{A_0}=75.9\%[/tex]

Best regards!