What is pentene?
A.) An Alkane
B.) An Alkene
C.) An Alkyne
D.) A Polymer

Answer:

Paper

Explanation:

This is because out of all of the above it is the only physical substance

Answer:

First one: Yes, It can be negative.

Explanation:

First one: The reason you can have negative acceleration is that acceleration can slow down, or decelerate, causing the negative acceleration.

Answer:

Black

Explanation:

White color reflects visible light while Black absorbs all light, and gives heat, so the answer is Black!

Answer:

Loss of energy to a colder material. Ice forms at 32°F /0° C.

Explanation:

As water cools, the natural movement between the molecules slows until it changes to a solid state (just as it boils to gas if they become too active). This movement doesn't completely stop until the material hits "absolute zero" at -460°F /-273° C. (0° Kelvin).

That's about the temperature "in the shade" in outer space.

A more interesting question would be, "why does water expand when it freezes?" The H - two - O molecule forms a triangle (with the O in the middle).

As it cools, the angle formed by the two H's gets larger. At around 36°F /2° C , the shrinking space between molecules gets overwhelmed by the expanding size of each molecule.

So, for those last few degrees before freezing, the overall volume gets bigger instead of continuing to decrease.

That's what causes potholes in roads (water settles into cracks, then makes the crack larger as it freezes). It's what damages the eaves trough around your roof, breaks leaves down into topsoil and splits boulders in half.

Density is intensive because it is the ratio of two extensive properties that is mass to volume.

Density is defined as mass per unit volume. S.I unit if density is kg/m³.

It is expressed as

Density = [tex]\frac{\text{Mass}}{\text{Volume}}[/tex]  or [tex]d = \frac{m}{V}[/tex]

Intensive property is the property which does not depend on the size of the system. Intensive property can be easily identified. Intensive property is the independent property. The size does not change in this.

Example of intensive property are Density, Freezing point, melting point, colour, Lustre, etc.  

Extensive property is the property which depend on the substance. Extensive property cannot be easily identified.

Example of extensive property length, weight, volume, mass etc.

Thus from the above conclusion we can say that Density is intensive because it is the ratio of two extensive properties that is mass to volume.

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Disclaimer: The given question is incomplete on the portal. Here is the complete question.

Question: The density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v)

density = [tex]\frac{\text{Mass}}{\text{Volume}}[/tex]  or [tex]d = \frac{m}{V}[/tex]

Considering that mass and volume are both extensive properties, explain why their ratio, density is intensive.

Answer:

Water

Explanation:

The solvent that formed this mixture is the water. The solute is lithium chloride.

Since the solvent is the dissolving medium, it is stated in the problem that lithium chloride completely dissolves in the water.

Therefore, the water is the solvent.

Answer:the answer is C

Answer:

C

Explanation:

I'm doing this test now and I just got it right :)

1Kg = 1000g

the molar mass of NaCl = 58.44 g/mol

number of moles = Mass / Molar mass

n = 1000g ÷ (58.44 g/mol)

n = 17.1115 mol

since you want the answer in one decimal place

then number of moles = 17.1 moles

Answer:

Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up.

Hope it help

Answer:

HBr

Explanation:

Answer:

digestion

Explanation:

The parasympathetic nervous regulates life-sustaining processes, like digestion, during times when your body is relaxed.

Answer:

0.37atm

Explanation:

Given parameters:

Initial pressure  = 0.25atm

Initial temperature  = 0°C  = 273K

Final temperature  = 125°C  = 125 + 273  = 398K

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we use a derivative of the combined gas law;

           [tex]\frac{P1}{T1}[/tex]  = [tex]\frac{P2}{T2}[/tex]

  P and T are pressure and temperature

  1 and 2 are initial and final values

        [tex]\frac{0.25}{273}[/tex]   = [tex]\frac{P2}{398}[/tex]  

         P2  = 0.37atm

Answer:98.1 meters = 98,100 mm

Explanation: 1 meter = 1,000 mm.

Answer:

P₂ = 3.61 atm

Explanation:

Given data:

Initial pressure of tank = 3.20 atm

Initial temperature = 22.0°C

Final temperature = 60.0°C

Final pressure = ?

Solution:

Initial temperature = 22.0°C (22.0 +273 = 295 K)

Final temperature = 60.0°C (60 +273 = 333)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

3.20 atm / 295 K = P₂/333 K

P₂ = 3.20 atm × 333 K / 295 K

P₂ = 1065.6 atm. K /295 K

P₂ = 3.61 atm

Answer:

The answer is 3.61

Explanation:

reI did all the math and everything, the pressure is 3.61

The total enthalpy change for the reaction is 200 J.

During an exothermic reaction, heat is released from the system which leads to an increase in its temperature.

The enthalpy change during an exothermic reaction is given by the equation,

Q= m × S × ΔT

Here, Q ⇒ Enthalpy change during a reaction

m ⇒ Mass of the substance

S ⇒ Specific Heat Capacity of the system

ΔT ⇒ Change in temperature of the system

On applying the given values in the above equation, we get the value of enthalpy as

Q= 10 x 2 x 10

  = 200 J.

Hence, the total enthalpy change for the reaction is 200 J.

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Answer:

a milllion moles

Explanation:

Answer:

Option B

Explanation:

The reaction can be summarized as

6O2+C6H12O6——›6CO2+6H2O+Heat

Answer:

B

Explanation:

Answer:

When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it's important that the measurement accounts for the meniscus. Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus. For a flat meniscus, make sure the liquid is level. Usually placing the container on a lab bench does the trick.

You won't be able to take an accurate reading looking up at the liquid level or down into it. Get eye level with the meniscus. You can either pick up the glassware to bring it to your level or else bend down to take measurements in situations where you're concerned with dropping the container or spilling its contents.

Use the same method to take measurements each time so that any errors you make will be consistent.

Explanation:

Answer: Pollution.

Explanation: Humans are polluting Earth's oceans with our toxic waste and plastic garbage. This trash kills the coral reefs that exist in said oceans.

Answer:

Really pollution because that includes a lot of things

Explanation:

Have a good day

Answer T

Explanation:

Answer:

The food pyramid is just to make people have a healthier "Diet."

Explanation:

It shows the food groups we eat and which ones to put together to make a healthy diet. Eating the right amount of each food group is called a "Balance" diet. Therefore, its not needed, but it is useful.

Answer:

Explanation:

I am sorry but please give detailed question

Answer:

Step 1 − Divide the decimal number to be converted by the value of the new base.

Step 2 − Get the remainder from Step 1 as the rightmost digit (least significant digit) of new base number.

Step 3 − Divide the quotient of the previous divide by the new base.

Step 4 − Record the remainder from Step 3 as the next digit (to the left) of the new base number.

Repeat Steps 3 and 4, getting remainders from right to left, until the quotient becomes zero in Step 3.

Explanation:

Answer:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.

Answer:

by the looks of it the answer you have is correct

Explanation:

Answer:

The answer B

.

Explanation:

The volume of water that would overflowed out of the tub is directly related to the volume of the object submerged on it. Thus it depends on the mass and density of the object.

The Greek mathematician and inventor Archimedes discovered the physical law of buoyancy, which states that any body completely or partially submerged in a fluid (gas or liquid) at rest is subject to an upward, or buoyant, force whose magnitude is equal to the weight of the fluid displaced by the body.

The volume of fluid that has been displaced is equal to the volume of an object that is completely submerged in the liquid or to the portion of the volume below the surface for an object that is only partially submerged.

The buoyant force's strength is equal to the weight of the fluid that has been dispersed. A body floating in a liquid or gas experiences an analogous buoyant force.

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Explanation:

The boiling point of a pure substance is the temperature at which the substance transitions from a liquid to the gaseous phase. At this point, the vapor pressure of the liquid is equal to the applied pressure on the liquid.

The concentration of the Nitric acid solution : 0.114 M

Titration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range  

Titrations can be acid-base titration, depositional titration, and redox titration. An acid-base titration is the principle of neutralization of acids and bases  

Reaction

HNO₃ + NaOH → NaNO₃ + H₂O​

Concentration a standard solution  of sodium hydroxide :  0.0998 mol/dm³ , and the volume = 25 cm³

moles NaOH=

[tex]\tt mol=M\times V\\\\mol=0.0998\times 25\\\\mol=2.495~mlmoles[/tex]

From the equation, mol ratio HNO₃ : NaOH = 1 : 1, so mol HNO₃ = mol NaOH=2.495 mlmoles

The volume of HNO₃ = 21.8 cm³, so the concentration :

[tex]\tt M=\dfrac{n}{V}\\\\M=\dfrac{2.495}{21.8}\\\\M=0.114[/tex]

The concentration of the nitric acid solution is 0.11445 mol/dm³

From the question,

We are to calculate the concentration of the nitric acid solution

The given balanced chemical equation for the reaction is

HNO₃ + NaOH → NaNO₃ + H₂O​

This means 1 mole of HNO₃ is needed to completely neutralize 1 mole of NaOH

Using the formula

[tex]\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}[/tex]

Where [tex]C_{A}[/tex] is the concentration of acid

[tex]C_{B}[/tex] is the concentration of base

[tex]V_{A}[/tex] is the volume of acid

[tex]V_{B}[/tex] is the volume of base

[tex]n_{A}[/tex] is the mole ratio of acid

[tex]n_{B}[/tex] is the mole ratio of base

From the given information

[tex]C_{B}= 0.0998\ mol/dm^{3}[/tex]

[tex]V_{A} = 21.80 \ cm^{3}[/tex]

[tex]V_{B} = 25.0 \ cm^{3}[/tex]

From the balanced chemical equation

[tex]n_{A} = 1[/tex]

[tex]n_{B} =1[/tex]

Putting the parameters into the formula, we get

[tex]\frac{C_{A} \times 21.80 }{0.0998 \times 25.0} = \frac{1}{1}[/tex]

Then,

[tex]C_{A} \times 21.80=0.0998 \times 25.0[/tex]

∴ [tex]C_{A}=\frac{0.0998 \times 25.0}{21.80}[/tex]

[tex]C_{A} =\frac{2.495}{21.80}[/tex]

[tex]C_{A} = 0.11445 \ mol/dm^{3}[/tex]

Hence, the concentration of the nitric acid solution is 0.11445 mol/dm³

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The reaction proceed more quickly when the surface area is increased because the frequency of collision increases.

Collision theory states that for a chemical reaction to proceed, it should achieve these conditions-

Increasing the surface area increases the probability of effective collisions. It thus increases the probability of the three conditions being achieved and results into increase in the frequency of collision and thus increases the rate of reaction.

Therefore, the reaction proceed more quickly when the surface area is increased because the frequency of collision increases.

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