Which sentence from the article BEST supports the idea that not all liquids evaporate at the same temperature?

A
The temperature at which a liquid turns into a gas is called its boiling point.
B
That same temperature can be considered the melting point if the temperature is increasing and causes a solid to become a liquid.
C
For example, liquid water turns to a solid form — ice — when it is cooled to 32 degrees Fahrenheit (0 degrees Celsius).
D
Different types of matter have different boiling, melting and freezing points.

The energy of a mole of blue photons is determined as  4.68 x 10⁻¹⁹ J.

The amount of energy carried by a photon is directly proportional to the photon's electromagnetic frequency and inversely proportional to the wavelength of the photon.

E = hf

E = hc/λ

where;

The energy of a mole of blue photons is calculated as follows;

E = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (425 x 10⁻⁹)

E = 4.68 x 10⁻¹⁹ J.

Thus, the energy of a mole of blue photons is determined as  4.68 x 10⁻¹⁹ J.

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The substance which contains useful elements which can be extracted from it is called ores.

The crust of the Earth contains some naturally occurring elements known as minerals, which comprise metal compounds.

Ores are mineral deposits from which metal may be economically and conveniently extracted. Generally, metals are not found in their natural state. Metals such as potassium, sodium, calcium, magnesium, and others are present in a combined state. Therefore, to obtain a pure form of metal, it must be extracted from these metal compounds. This process of extracting metal from the ore is known as Metallurgy. Remember that while all minerals are not ores, all ores are minerals.

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The substance is known as an ore.

We can define an ore as a mineral from which useful elements can be extracted economically and it contains valuable substances.

As an example for aluminum, the feldspars can be treated as an ore (NaAlSi3O8, KalSi3O8, & CaAl2Si2O8 ), from feldspars we can extract aluminum economically,

Gangue is another type of mineral which don't contain valuable substances.

There are four types of ores ,

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The correct option is (B) increase.

If the number of molecules of gas a is doubled, the rate of reaction will increase.

The measure of the change in reactant or product concentration per unit of time is known as the reaction rate for a specific chemical reaction.

The speed at which a chemical reaction proceeds is known as the reaction rate. The concentration of a reactant that is consumed in a unit of time or the concentration of a product that is produced in a unit of time is two common ways to define it (amount per unit volume).

The rate law and collision theory both state that reaction rate increases with concentration. Collisions happen more frequently as reactant concentration rises. Pressure causes a rise in the rate of gaseous reactions, which is actually comparable to a rise in the gas's concentration.

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The complete question is:

"Consider two gases, A and B, are in a container at room temperature. What effect will the following changes have on the rate of the reaction between these gases? The number of molecules of gas A is doubled.

(A)decrease

(B)increase"

Answer:

Telescopes have opened our eyes to the universe. Early telescopes showed that Earth was not the center of the universe, as was previously believed. They also showed mountains and craters on the moon. Later telescopes have revealed geography and weather on the planets in our solar system.

Explanation:

Answer:

Aluminum and Zinc

Explanation:

Amphoteric oxides have both acidic and basic properties. The oxides of aluminium and zinc are examples. They form salts when they react with acids. They also react with alkalis to form complex salts.

Answer in the attachment above.....

Option B) The reverse rate constant will increase 20-fold, because an enzyme does not alter the equilibrium constant, it must catalyze both forward and reverse reactions to the same extent.

The forward reaction rate constant divided by the reverse rate constant gives the equilibrium constant as per the catalyze that performs the role.

The reciprocal of the equilibrium expression for a reaction written in the forward direction is the expression for a reaction written in the reverse direction. The forward reaction’s constant is K, while the reverse reactions is K’.

Yes, the forward to the backward ratio of the equilibrium constant is what makes it feasible for a reaction to have big forward and reverse rate constants yet a tiny equilibrium constant.

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Complete Question

A reaction has an equilibrium constant, Keq, of 50. When performed in the presence of an appropriate enzyme, the forward rate constant is increased 20-fold. What will happen to the reverse rate constant?

a. In will decrease 20-fold.

b. It will increase 20-fold.

c. It will be unaffected.

The mass of carbon dioxide in this is 264 g according to the given data.

The molar mass is basically the total mass in grams of the atoms that make up a molecule per mole. Molar mass is measured in grams per mole.

Combustion is the process of burning glucose in the presence of oxygen.

The balanced reaction is

[tex]C_6H_1_2O_6+6O_2---- > 6CO_2+6H_2O[/tex]

As a result, each mole of glucose requires six moles of oxygen molecules.

Glucose has a molar mass of 180g per mole.

As a result, the reaction will be completed, with one mole of glucose reacting with six moles of oxygen to produce six moles of Carbon dioxide and six moles of water.

Carbon dioxide produced mass = moles X molar mass = 6 x 44 = 264 g

Thus, 264g will be the mass of the carbon dioxide produced.

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The equivalence of these value is 1.75 × 10⁻³ M.

Hardness = 175 mg CaCO₃/L

or mass of CaCO₃ in 1 L = 175 × 10⁻³ grams

Now,

Molar mass of CaCO₃ = 40 + 12 + ( 3 × 12 ) = 100 grams/mol

The concentration of CaCO₃ = number of moles / volume

or

= (175 × 10⁻³ / 100) / 1

or

= 1.75 × 10⁻³ M

Now,

      CaCO₃         ⇒        Ca²⁺         +         CO₃²⁻

1.75 × 10⁻³ M          1.75 × 10⁻³ M         1.75 × 10⁻³ M

thus,

the concentration of Ca²⁺ ions in water = 1.75 × 10⁻³ M

An equivalency relation on a set S is a transitive, symmetric, and reflexive relation on S. A square and a triangle cannot be superimposed since they are not equivalent in force, quantity, or value or in area or volume.

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According to bond energy, the maximum wavelength of light is 475 nanometers.

We need to know about bond energy to solve this problem. Bond energy is the energy needed to bond other atoms in the molecule. To determine the energy in one molecule of chlorine monofluoride, we can use this formula:

E = BE / Na

where E is the energy of photon, BE is bond energy and Na is Avogadro's number (6.02 x 10²³ atoms/mol)

Now, we can calculate the shortest wavelength by using Einstein's equation for photon energy:

E = h . c / λ

where h is Planck constant (6.6 x 10¯³⁴ J.s), c is the speed of light (3 x 10⁸ m/s) and λ is the wavelength.

From the question above, we know that

BE = 251 kJ/mol = 251 x 10³ J/mol

By substituting the given parameters, we can calculate the maximum wavelength

E = BE / Na

h . c / λ = 251 x 10³ / 6.02 x 10²³

6.6 x 10¯³⁴ . 3 x 10⁸ / λ = 251 x 10³ / 6.02 x 10²³

λ = 4.75 x 10¯⁷ m

λ = 475 nm

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The fire extinguisher should be aimed at the base of the flame.

A fire extinguisher is an active safety tool that is frequently used in emergencies to put out or control minor flames.

The most crucial thing to remember while utilizing a fire extinguisher is to keep your distance and aim towards the fire's base.

The majority of untrained individuals are prone to point fire extinguishers at the flames, however doing so causes the extinguishing ingredient to flow into the flames, rendering the entire procedure ineffectual. It's crucial that the extinguishing agent reaches the fire's foundation.

A fire extinguisher typically consists of a hand-held cylindrical pressure vessel that may be discharged with a chemical to put out a fire.

There are five basic types of fire extinguishers: wet chemical, dry powder, carbon dioxide, foam, and water.

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Answer:

Explanation:

1. Ammonium hydroxide and copper sulfate reaction is a double displacement reaction. This equation can be written as: CuSO4+➡(OH)2+(NH4)2SO4.

2. Zinc displaces copper from copper sulfate and generates zinc sulfate solution when added to CuSO4 solution because zinc is a more reactive metal that displaces less reactive metal from its solution. Equation: Zn+CuSO4 ➡ ZnSO4+Cu.

3.  Magnesium combined with sulfuric acid produces magnesium sulfate and hydrogen gas. For this reaction, we have a neutralization reaction. Equation: 2Mg+2H2SO4 ➡ 2MgSO4+2H2.

4. Copper (II) oxide, is a black solid, which, when reacted with sulphuric acid creates a cyan-blue-colored chemical called copper II sulfate. Copper (II) oxide reacts with sulfuric acid to create water and copper (II) sulfate. Equation: CuO + H2SO4 = CuSO4*H2O

Answer: Aspartame

Explanation:

Answer:

Since metals have more number of electrons therefore, they donate extra electron(s) in order to gain stability. Whereas non-metals have less number of electrons than metals. Hence, non-metals readily gain electron(s) in order to gain stability.

Sum for the mentioned entries are as follows.

(+1) + (-1) = 1 -1 = 0

(+2) + (-2) = 2 - 2 = 0

2(+1) + (-2) = 2 - 2 = 0

(+3) + 3(-1) = 3 - 3 = 0

3(+2) + 2(-3) = 6 - 6 = 0

Boyles law shows the relation between effect of pressure on volume at constant temperature.

In boyle's law mass is independent variable and volume is dependent variable. The equation of boyle's law is

pV= constant.

Because the gas particles are compressed closer together as the pressure on a gas rises, the volume of the gas decreases.

In contrast, as a gas's pressure falls, its volume rises as a result of the gas's ability to spread its particles farther apart. Because the volume of the gas has risen, weather balloons become larger as they ascend through the sky to lower pressure areas.

Therefore, Boyles law shows the relation between effect of pressure on volume at constant temperature.

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Answer:

C. Net force

Explanation:

The  water particles moves closer together towards each other.

The water in the beaker is in a liquid state of matter as given in the statement and the  temperature decreases from 50°C to 10°C when placed in a freezer by Kiley.
This means that heat from water is gradually being lost ,as the liquid water undergoes freezing in a solid state. When the  water in  liquid state is freezed, water molecules, which were moving more freely in liquid state  move closer to each other  because the speed at which the water molecules in the liquid state moved has been reduced in solid state (ice).

The process in where matter is changing from the liquid to the solid state is known as Freezing.  the freezing point of liquid like  water is 32°F or 0°C. 

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The answer would be 398.40 K and 4.71 * 10^-6 kW/K.

Temp. of Argon stream : 80 F = 299.817 K

Temp of CO2 stream : 550 F = 533.15 K

CO2 mass, flow rate : 0.5 lbm/h = 6.299 * 10^-5 kg/s

Ar,mass, flow rate : 1 lbm / h = 0.000125 kg /s

(a) Particular heat capacity of Ar : 0.523 kJ/Kg.K

Particular heat capacity of CO2 : 0.756 kJ/kg.K

Mass balance expression = mo3 = mo1 + m02 ; mo3 is mass mixture.

Formula to find heat capacity of mixed particle : cpm  mo1*cpa + mo2cpc/mo1 + mo2

= 0.6010 kJ/ kg.K

Formula for energy balance law mo3*cpm*T03 = mo1*cpa*To1 + mo2*cpc*To2

Put the values , and the temperature of the mixture is 398.40 K

(b) Formula for rate of entropy geneartion for process is

del So= mo1*cpa ln(T03 / T01) + mo2*cpc in (T03 / T02)

Put the values and we get del So = 4.71 * 10^-6 kW/K

The given question is incomplete : (a) Final Temperature ?

(b) Rate of entropy generation of the process ?

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Answer:

The real answer is ...................... .

When a metal is oxidized, its mass remains the same.

oxidation of metals is a chemical reaction of the metal surface with the oxygen present in the air that causes some of the metal to corrode or oxidize and form the respective metal oxide on the surface.

The oxidation reaction of a metal is given as;

Y⁺ˣ + O²⁻  = Y₂Oₓ

where;

A metal oxidizes by losing electron, this will not affect the mass of the metal since electrons have negligible masses.

Also, based on the law of conservation of mass, mass of the metal can neither be created nor destroyed but can be transformed from one form to another.

Thus, when a metal is oxidized, its mass remains the same.

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Group 1: 1+

Group 2: 2+

Group 13: 3+

The charges of the ions are dependent on the number of valence electrons.

Valence Electrons

Group 1 has 1 valence electron, group 2 has 2, and group 13 has 3. It is important to remember that elements will attempt to have a full valence shell. They may either attempt to lose all of their valence electrons or fill the energy level with 8 electrons.

Since all of these groups have less than 4 valence electrons, they will attempt to lose their valence electrons.

Determining Charges

When atoms lose electrons, they gain a positive charge. Since all of these elements will lose electrons, all of the ions will be positive, also known as a cation.

The positive charge of an element is equal to the number of electrons the atom loses. This means that group 1 will have a 1+ charge because it loses 1 electron. Continue this pattern to determine that group 2 will have a 2+ charge and group 13 will have a 3+ charge.

C. The stationary soccer ball will begin moving downfield and the ball that struck it will slow down

Collision occurs when two objects travelling in opposite direction hit or strike each other.

Collision of two objects can be perfectly elastic or inelastic.

When the ball strikes the stationary ball, it will slow down while the stationary ball will move downfield. This is because some of the momentum of the soccer ball will be transferred to the stationary ball.

Thus, the stationary soccer ball will begin moving downfield and the ball that struck it will slow down.

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Responses and Reasoning

Hello! Lets begin!

1. Which statement best describes force?

"Why?"

Force refers to the push or pull exerted on an object that influences the motion and direction of the object. Force is a vector quantity, meaning that it combines both magnitude and direction. The direction of the force applied to an object affects the motion of the object and, due to force being a vector quantity, the value of forces can be assigned a negative or positive value.

______________________________________________________

2. A soccer ball is traveling downfield with a force of 1.2 kN and strikes another soccer ball that is stationary. Which of the following describes the result of the collision?

"Why?"

When an object is at rest, the object is in a state of balanced forces. The object at this time is stationary, and will remain that way until another force/object forces it into inertia, sending the object into motion. Now, in this scenario, the ball in motion collides with the ball at rest, sending the resting ball forward. When a collision of force occurs, the original object in motion begins to slow down after the transfer of force and eventually falls into a resting state.

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3. Which of the following scenarios accurately describes magnitude and direction?

"Why?"

Force is a vector quantity that measures both direction and magnitude of a push or pull on an object . It can also be explain as, force is an external agent capable of changing a body’s state of rest or motion. It has a magnitude and a direction.

The direction towards which the force is applied is known as the direction of the force, It is represented by F and unit is Newton & S.I. unit is kg ·m/s².

F = ma

Where, m is the mass of body and a is the acceleration of the body .

Acceleration of a body or an object is given as, the rate of change of the velocity of an object with respect to time. The unit of acceleration is m/s².

a = Δv/Δt

Where , Δv is the change in acceleration and Δt change in time .

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4. What is the force directly proportional to?

"Why?"

As we increase the force on an object the acceleration increases proportionally. Since the mass does not change as the acceleration increases, we can say that force is equal to acceleration. Therefore, if you double the force you double the acceleration.

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5. Two ropes are being used to suspend a box. Each rope is exerting 5 N of upward force. If the forces are balanced and the box is stationary, how much force is being exerted by the box itself and in which direction?

"Why?"

Balanced forces of objects at rest often are in balance of both gravitational force and normal force. The forces are pushing the object both down and up keep the object at a state of rest until a force/object force the object into a state of inertia (into motion). This being said, if each individual rope is exerting 5 N of upward force, (note the question quotes the forces are balanced) and the box is stationary, the force of the box must be 10 N of force downward in order for the forces to remain balanced.

______________________________________________________

Hope this helps! If you have any more questions, I'd be happy to help. Thanks and good luck!

After selecting the hypothesis, the next step is to design an experiment to test the hypothesis.

For example, our hypothesis is "deforestation causes soil erosion".

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The specific heat of the metallic element rhodium is 0. 240 j/g-k at 25°c. If 586 j of heat is added to an 80. 0 g block of rhodium metal that is initially at 25. 0°c,  the expected final temperature of the block 55.5 °C.

As we know heat is equal to:

Q= mcΔT

Given values:

M= 80 g

C = 0.240 J/g K

Q= 586 J

To find final temperature

ΔT = 586 / 80 x 0.240 = 30.5 °C

Final temperature =25 + 30.5 = 55.5 °C

The final temperature is  55.5 °C.

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The number of aspirin tablets that can by made from 875 g of aspirin in which one aspirin tablet has 325 mg of aspirin is 2692 tablets.

Amount of aspirin present in 1 tablet = 325 mg

Total Amount of Aspirin present = 875 g.

Convert 875 g into mg.

1 g = 1000 mg

875 g = 875x 1000 mg = 875000 mg

Hence, Total Amount of Aspirin present = 875000 mg

Number of tablets made from 325 mg of aspirin = 1

So, the number of Aspirin tablets that can be made from 8750o0 mg aspirin  = 875000 x (1/325)

             = 875000/325 = 2692 tablets

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A polar liquid and a nonpolar liquid that don't mix together is the best illustration of immiscible liquids among those mentioned above.

Liquids that are immiscible do not combine to generate another liquid

Here are a few more instances of immiscible liquids:

Contrarily, miscible liquids are two liquids that can mix together to make one larger liquid.

Therefore, a polar fluid and a nonpolar fluid that are unable to melt into one another are the greatest examples of immiscible liquids from the alternatives above.

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Answer:

Hydrogen Gas

the chemical formula is H2

Answer:

hydrogen gas

Explanation:

Na + H20 -------> Na20 +H2