Which carbohydrate strengthens plant cells?
A. glucose
B. glycogen
C. cellulose
D. lactose

Answer:

Thermal energy comes from heat sources that provide energy from it's temp.

Explanation:

Produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy. 6 min, 47 sec Heat Energy.

(If this doesn't help let me know in the comments, I'll try to explain better :> )

Answer:

Please find the graph file in the attachment file.

Explanation:

Heat of vaporization is the amount of heat required to melt a solid. Therefore option C is correct.

The amount of energy required to turn a portion of a liquid material into a gas is known as the enthalpy of vaporization, commonly referred to as the heat of vaporization or heat of evaporation. The pressure at which the transition occurs affects the enthalpy of vaporization.

The amount of energy required for one gram of a liquid to evaporate  without a change in pressure is known as the heat of vaporization. As the solid or liquid transitions into a less dense state of matter, these energies are required to disperse the intermolecular forces keeping it together.

vaporization is the process by which a material is transformed from its liquid or solid state into its gaseous  state. Boiling is the term for the vaporization process when circumstances permit the creation of vapour bubbles within a liquid.

Thus, option C is correct.

To learn more about heat of vaporization follow the link below;

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The amount of heat needed to cause a liquid to evaporate is known as the heat of vaporization. So, option B is right.

When a liquid is heated, the molecules at the surface of the liquid gain enough energy to escape from the liquid and become a gas. This process is called evaporation.

The heat of vaporization is the amount of heat that is required to vaporize one gram of a liquid at a constant temperature.

The heat of vaporization is different for different liquids. For example, it takes 2260 joules of heat to vaporize one gram of water at 100 degrees Celsius.

The heat of vaporization is a measure of the strength of the intermolecular forces in a liquid. The stronger the intermolecular forces, the more heat is required to vaporize the liquid.

Therefore, the answer is B, that the heat of vaporization is the amount of heat required to evaporate a liquid.

Learn more about vaporization here;

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Answer:

True!

Explanation:

Living things are classified by the characteristics they have in common. All living organisms are classified within the organization based on extremely fundamental, shared characteristics.

Answer:

Assist in the movement of food and waste through the digestive system

Answer:

a). P = 688 atm

b). P = 1083.04 atm

c).Δ G = 16.188 J/mol    

Explanation:

a). Fugacity 'f' can be calculated from the following equations :

[tex]$\ln \frac{f}{P}=\int^P_0\left(\frac{Z-1}{P}\right) dP$[/tex]

where, P = pressure ,  Z = compressibility

Now, the virial equation is :

[tex]$PV=R(1+6.4\times 10^{-4} P)$[/tex]  ........(1)

Also, PV=ZRT for real gases .......(2)

∴ [tex]$ZRT=RT(1+6.4\times 10^{-4} P)$[/tex]

  [tex]$Z=1+6.4\times 10^{-4} P$[/tex]

So from the fugacity equation ,

[tex]$\ln \frac{f}{P}=\int^P_0\left(\frac{1+6.4\times 10^{-4}P-1}{P}\right) dP$[/tex]

[tex]$\ln \frac{f}{P}=\int^P_0\left(\frac{6.4\times 10^{-4}P}{P}\right) dP$[/tex]

[tex]$\ln \frac{f}{P} = 6.4 \times 10^{-4} P$[/tex]

[tex]$f=Pe^{6.4 \times 10^{-4} P}$[/tex]

Putting the value of P = 500 atm in the above equation, we get,

f = 688 atm

b). Given f = 2P

    [tex]$2P=PE^{6.4 \times 10^{-4}P}$[/tex]

   [tex]$2=E^{6.4 \times 10^{-4}P}$[/tex]

  [tex]$\ln 2 = 6.4 \times 10^{-4}P$[/tex]

  ∴  P = 1083.04 atm

c). dG = Vdp -S dt  at constant temperature, dT = 0

Therefore, dG = V dp

[tex]$\int^{G_2}_{G_1}dG =\int^{P_2}_{P_1}V dp $[/tex]

            [tex]$=\int^{P_2}_{P_1}\frac{RT}{P}\left(1+6.4 \times 10^{-4}P\right) dP$[/tex]

           [tex]$=\int^{P_2}_{P_1}RT\frac{dp}{P}+\int^{P_2}_{P_1}RT6.4 \times 10^{-4} dP$[/tex]

[tex]$\Delta G=R[\ln\frac{P_2}{P_1}+6.4 \times 10^{-4}(P_2-P_1)]$[/tex]

[tex]$\Delta G=8.314\times 298[\ln\frac{500}{1}+6.4 \times 10^{-4}(500-1)]$[/tex]

Δ G = 16.188 J/mol  

Answer:

to answer your question "which state of matter have most space between particles"

gas is your best answer

Explanation:

when in gas form..particles gain energy and move further apart

for solids particles are fixed (stays in one spot) and vibrates and for liquids particles gain energy but doesn't have enough space to move around freely..so gas is you best answer

Answer:

It is not water absorbant and also the colour black, due to it's dark nature makes the person wearing the cloth feel hot. Unlike cotton, silk is not at all water absorbant as it does not absord any sweat produced in the wearers body

Answer:

Because the infrared lamp gives off a type of light that the desk lamp does not, and the mirror can only take in the energy from the infrared light.

Explanation:

Answer:

the mass of 2.9 moles of calcium is 116 g

Explanation:

The computation of the mass of 2.9 moles of calcium is shown below

As we know that

Mole = mass ÷  molar mass

where,

Moles be 2.9

And, we know that the molar mass of calcium be 40g/mol

Now put the values to the above formula

2.9 = Mass ÷ 40

So, the mass would be

= 40 × 2.9

=   116 g

Hence, the mass of 2.9 moles of calcium is 116 g

Sulfate - SO4^-2

Sulfite - SO3^-2

Hydrogen Sulfate - HSO4-

Answer:

1- Se 2-Na 3- I guess Si as well 4-Ar 5-O

Explanation:

Answer:

HCl(aq) + KOH(aq --> KCl(aq) + H₂O(l)

Explanation:

Answer:

See explanation

Explanation:

CO2 is often released by the combustion of fossil fuels. Fossil fuels are quite common sources of energy in our world today.

A lot power plants, vehicles, etc rely on energy produced as a result of the combustion of fossil fuels yielding carbon dioxide.

Hence, irrespective of the fact that CO2 leads to global warming but Nigeria is still ranked one of the greatest emitters of CO2.

The menace of rising CO2 leves can only be checked by stakeholders in the energy sector coming together to exploit renewable energy as a regular source of energy.

Answer:

C) 0.800 mol

Explanation:

In order to convert from moles of Al₂O₃ into moles of Al, we'll need to use the stoichiometric coefficients, using a conversion factor that has Al₂O₃ moles in the denominator and Al moles in the numerator:

So the correct answer is option C).

Answer:

Nervous

Explanation:

Nervous tissue is composed of two main cell types: neurons and glial cells. Neurons transmit nerve messages.

Answer:....

Explanation:...

Answer:

The correct answer is : C.

Explanation:

The characteristics of a property of molecular substances is low melting point.

differences

Answer:

1.30 mol P

Explanation:

take what is given to you (40.4g). now divide it by the molar mass of the asked element (phosphorus = 30.97g/mol)

40.4g P / 30.97g/mol P = 1.30 mol P

hope this helps :)

Answer:

molar mass of  unknown monoprotic acid = 114.1 g / mole.

Explanation:

Note: This question is incomplete and lacks necessary data to solve for the required calculation. However, I have similar question on the internet and seen the question completely and will be using that data to solve for this question in order to solve required calculation. Besides that, complete question asks us to solve for molar mass of the acid used.

Note: I have attached the screenshot of the complete question, please have a look on it in the attachment below.

Calculation:

Volume = 34.81mL

34.81 mL of 0.4346 M potassium hydroxide

= 0.03481 L * 0.4346 mole / L

= 0.01513 mole.

Balance equation:

HA + KOH ----> KA + H2O

As we know from the question,

one mole HA neutralize with 1 mole KOH.

mole of unknown monoprotic acid = 0.01513 mole.

And we know that the formula for mole is:  

mole = mass / molar mass

Making molar mass as the subject:

 Molar mass = mass / mole

Molar mass = 1.726 g / 0.01513 mole

Molar mass = 114.1 g / mole.

So,  

Molar mass of  unknown monoprotic acid = 114.1 g / mole.

Answer:

the second one

Explanation:

metal doesn't act like a magnet because the domains don't have a preferred direction of alignment. Magnets are all aligned in a specific direction.

Answer:

123.2 Liters.

Explanation:

At STP (T = 273K & P = 1atm), one mol of any gas will occupy 22.4 liters.

With the above information in mind, we can calculate how many liters would 5.500 mol of gas occupy:

5.500 mol * 22.4 L / mol = 123.2 L

So 5.500 moles of C₃H₃ would have a volume of 123.2 liters at STP.