which type of bond does this molecule show?

A. hydrogen bond
B. ionic
C. Double covalent
D. magnetic bond

Answer:

[tex] \textbf{ \huge\boxed{ \sf ETHENE}}[/tex]

Explanation:

As the above statement says two carbon atoms are bonded to each other with double bond, the suffix used for double bond is -ene & the prefix for two carbon atoms is eth- & it says four Hydrogen atoms are attached to carbons, 2 Hydrogens to each carbon above & below.

When we draw the structural formula it comes out that the molecule is ethene.

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The resistance of the wire is directly proportional to the length of the wire, l.

Resistance is given as the ability of the wire to resist or stop the flow of current. The resistance of the wire can be given to have the formula:

[tex]\rm Resistance=\dfrac{length }{area}[/tex]

Thus, it can be given that the resistance of the wire is inversely proportional to the area of the cross-section and directly proportional to the length.

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Taking into account the definition of dilution, a volume of KI solution of 0.125 L of concentration of 3 M would use to make 0.3L of KI solution of 1.25 M.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

3 M× Vi= 1.25 M× 0.3 L

Solving:

Vi= (1.25 M× 0.3 L)÷ 3 M

Vi= 0.125 L

In summary, a volume of KI solution of 0.125 L of concentration of 3 M would use to make 0.3L of KI solution of 1.25 M.

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Answer:

the  anser is the periodic table of the elements

Explanation:

Clastic rocks are classified by grain shape, grain size, and sorting. Chemical sedimentary rocks are precipitated from water saturated with dissolved minerals. Chemical rocks are classified mainly by the composition of minerals in the rock.

hi again, hope this helps ^^

Answer: The difference is clastic rocks are classified by grain size, grain shape, and sorting. Chemical sedimentary rocks are precipitated from water saturated with dissolved minerals.  They are also mainly classified by the composition of minerals that are in the rock.

Explanation:

The equilibrium constant gives the relation between the product formation and the reactant used. The concentration of the dinitrogen tetroxide is 0.003 M,  and nitrogen dioxide is 0.054 M.

An equilibrium constant gives the conversion rate of the reactant of the chemical reaction into the products.

The reaction can be shown as,

[tex]\rm N_{2}O_{4} \rightleftharpoons 2NO_{2}\;\; \rm Kp = 4.5[/tex]

From the ICE table attached below, the concentrations are calculated as:

[tex]\begin{aligned}\rm Kp &= \rm \dfrac{[NO_{2}]^{2}}{N_{2}O{4}}\\\\4.5 &= \rm \dfrac {x^{2}}{(0.0550 - x)}\\\\\rm x^{2} &=\rm 4.5 (0.0550 - x)\end{aligned}[/tex]

Solving further,

[tex]\begin{aligned} \rm 0.2475 - 4.5 x &= \rm x^{2}\\\\\rm x^{2} + 4.5 x - 0.2475 &= 0\\\\\rm x &= 0.054\end{aligned}[/tex]

Therefore, the concentration of nitrogen dioxide is 0.054 M and dinitrogen tetroxide is 0.003 M.

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The vapour pressure of the solution of glycerol is 106.4 torr.

The vapour pressure is given as the pressure extered by the individual sample in a solution. According to Roult’s law, the vapour pressure of mixture is given as:

[tex]\rm Vapor\;pressure\;of\;solution=moles\;of\;solute\;\times\;vapour\;pressure\;of\;pure\;solvent[/tex]

The density of glycerol is 1.25 g/mL. The mass of glycerol in 261 mL will be:

[tex]\rm Density=\dfrac{mass}{volume}\\\\1.25\;g/mL=\dfrac{mass}{261\;mL}\\\\Mass =326.25\;g[/tex]

The moles of glycerol are given as:

[tex]\rm Moles=\dfrac{mass}{molar\;mass}\\\\Moles=\dfrac{326.25}{92.09\;g/mol}\\\\Moles=3.54\;moles[/tex]

The density of water is 1, thus the mass of 379 mL water is 379 grams. The moles of solvent are:

[tex]\rm Moles=\dfrac{379}{18\;g/mol}\\\\Moles=21.05\;moles[/tex]

The mole fraction of solute is given as:

[tex]\rm Mole \;fraction=\dfrac{moles\;of\;solute}{moles\;of\;solute\;+\;moles\;of\;solvent}\\\\Mole\;fraction=\dfrac{3.54}{3.54+21.05}\\\\Mole\;fraction=0.14[/tex]

The mole fraction of solute is 0.14. The vapour pressure of pure water at boiling point is equivalent to the atmospheric pressure i.e. 760 torr.

Substituting the values in Roult’s law, the vapour pressure of solution is given as:

[tex]\rm Vapor\;pressure=0.14\;\times\;760\;torr\\Vapor\;pressure=106.4\;torr[/tex]

The vapour pressure of the solution of glycerol is 106.4 torr.

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From the calculations and data, the equilibrium constant is 16.

The term equilibrium refers to the state in which the rate of forward reaction and the rate of reverse reaction becomes equal.

Setting up the ICE table

Concentration of HI =  4.00 mol /2.00l  = 2 M

Concentration of H2 and I2 = 0.4 M

Hence;

             2HI <==> H2(g) + I2(g)

I             2             0            0

C            -x           +x            +x

E           2 - x         0.4         0.4

Hence x = 0.4

[HI]eq =

2 - 0.4 = 1.6

Keq = (1.6)^2/(0.4)^2 = 2.56/0.16 = 16

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Answer:biomass energy, hydropower, and wind energy

Explanation:

If the given emf (1.5 volts) is greater than the emf you observed in your experiment, then the motor with 1.5 volts will move faster.

The speed of the motor depends on the strength of the induced emf in the coil of the electric motor.

emf = NdФ/dt

where;

F = BIL = qvB

where;

As the induced current in the coil of the motor increases, the speed of the motor will increase.

Thus, if the given emf (1.5 volts) is greater than the emf you observed in your experiment, then the motor with 1.5 volts will move faster.

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Answer:

The motor will spin slower

Explanation:

The other three motors have either 9, 12, or 15 loops of wire. The more loops, the faster it goes.

The correct order of the vertical cross-section of soil layers is organic, topsoil, subsoil, parent rock, and bedrock.

The soil profile is the vertical cross-section of soil from the top to the underlining bedrock layer.

Starting from the top, soil contains organic materials in the form of decomposing leaves, twigs, etc. Immediately after the organic materials lies the topsoil.

After the topsoil comes the subsoil, parent rock, and bedrocks respectively.

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Answer:

A organic, topsoil, subsoil, parent rock, bedrock

Explanation:

Answer:

228.38g of CO2

Explanation:

Answer:

If Black Holes Are "Black," How Do Scientists Know They Are There? A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole.

Explanation:

some examples; 1. Pushing a wheel barrow.

2. Opening or closing a door.

3. Squeezing wet clothes.

4. Gravitational force.

5. Brakes applied to stop a moving vehicle.

6. A football kicked harder that decreases due to the frictional force.

7. Rubbing a glass rod with a silk.

8. Pressure applied on a pin of a notice board.

9. Running

10. Pushing

Supernova or void is another force or phenomenon that cannot be seen directly similar to black holes.Examples of the effects are gravitational force, brakes applied to stop a moving vehicle.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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Answer:

The first step would  be searching for your scientific vocabulary the second step is to write it down and then that would be your answer.

Explanation:

Hope this helps!

Answer: 14.24

Explanation:

Answer:

Factors Affecting the Preferential Discharge of Ions in Electrolysis

Explanation:

n=,4.5 moles C2H6

the ratio 2:7

4.5:x

x=15.75 moles

Answer:

C Ammonia

Pure water is neutral, so pH is about 7

Vinegar is acidic, pH is around 2-3

Ammonia is alkaline, pH around 11.6

Vitamin C is also acidic, pH is around 3.5 to 6

As pH increases with how alkaline the substance is, substances with a lower pH is more acidic, while substances with a higher pH is more alkaline

the question is asking for the highest pH, so you should choose the most alkaline substance

therefore the ans is C, which is ammonia

Answer:

Option A

Explanation:

Option A

Option B

Option A is the correct answer.

The force that causes a fishing line to snaps due to the inability to hold the weight of a fish is called the Tension Force

A tension force is a force that acts upon a surface, material and a line. It acts on a line as a result of a force that causes the line to stretch.

Tension acts on the two ends of a line, it can be said to be an action and reaction force.

Tension acting on a fishing line comes from the fisherman and the fish to be caught. The tension meets at the middle of the line and when the line is not strong enough to hold such amount of force it snaps.

In conclusion, The force that causes a fishing line to snaps due to the inability to hold the weight of a fish is called the Tension Force

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Answer:

the second one is the correct answer

Answer:

its b

Explanation:

Answer:

Climate change and an increase in unpredictable and extreme weather is a growing challenge. Long periods of drought affect clean water supplies while flooding can pollute clean water sources and cause outbreaks of disease.

Answer:

could be areas they live in

Answer:

There are 7 diatomic elements: hydrogen, nitrogen, oxygen, flourine, chlorine, iodine and bromine

The detriment of these advancements to the Earth is that: the growing population is taxing Earth's resources which could lead to the extinction of many species.

Various scientific discoveries and technological advances around the world have led to an exponential increase in Earth's population with no end of the growth in sight.

In conclusion, we can infer and logically deduce that the statement which best describes how these advancements are detrimental to the Earth is that the growing population is taxing Earth's resources and this may likely lead to the extinction of many species of organisms.

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The amount of heat which is released during the given change is -1,369.68 Joules.

Required amount of heat in any chemical reaction will be calculated as:

Q = mcΔT, where

m = mass = 4.25 + 60 = 64.25g

c = specific heat = 4.18 J/g. degree C

ΔT = change in temperature = 16.9 - 22 = -5.1 degree C

On putting values, we get

Q = (64.25)(4.18)(-5.1) = -1,369.68 J

Hence released heat in the reaction is -1,369.68 J.

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Answer:

B

Explanation:

You might want to pick "A sound is created" No that answer is just fine. If you listen when sitting around a campfire, you might hear the crackling of what is burning. Burning is an excellent example of a chemical change. Wood becomes ash.

The answer is a change in the state of matter. (B). That need not indicate a chemical change. In fact, most of the time, a change in matter is a physical change.

Answer: B