Sound travels fastest through what?

A. Space

B. Cool air

C. Warm air

D. A metal spoon

Answer:

Polymerization

Explanation:

Several natural and man-made organic compounds are enormous molecules which contains hundreds of thousands of atoms per molecule.

The giant molecules formed are produced through the process of polymerization.

Polymerization is the linking of monomers through chemical reactions to form long chain polymer molecules.

Monomers are small molecules that are joined to form polymers.

Synthetic plastics are derieved from synthetic polymers. These synthetic materials are very useful and vital due to their great size. Their size premits a certain complexity of structure which makes the molecules disposed in a regular pattern with respect to one another. They stretch out nearly to alongside of one another or coil up independently. The polymerization of monomers to form plastics fosters the various uses these giant molecules are put to.

Answer:

polymerization.

Explanation:

The answer is B.

Each of the points or vertex represent a carbon atom. Answer choice B is the only choice that has 8.

Answer:

1.8 L.

Explanation:

2H₂(g) + O₂(g) → 2H₂O(g),

It is clear that 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.

It is known that at STP: every 1.0 mol of any gas occupies 22.4 L.

using cross multiplication:

1.0 mol of H₂ represents → 22.4 L.

??? mol of H₂ represents → 3.6 L.

∴ 3.6 L of H₂ represents = (1.0 mol)(3.6 L)/(22.4 L) = 0.1607 mol.

Using cross multiplication:

2.0 mol of H₂ react completely with → 1.0 mol of O₂, from stichiometry.

0.1607 mol of H₂ react completely with → ??? mol of O₂.

∴ The no. of moles of O₂ = (1.0 mol)(0.1607 mol)/(2.0 mol) = 0.08036 mol.

1.0 mol of O₂ represents → 22.4 L, at STP.

0.08036 mol of O₂ represents → ??? L.

∴ The no. of liters of O₂ will be produced = (0.08036 mol)(22.4 L)/(1.0 mol) = 1.8 L.

Answer:

The answer is 1.8 L

I believe the answer is A

Answer:

An acid would be soemthing that starts with H (hydrogen)

That is just the way it is written chemically.

Hope this helped!

Explanation:

32g/mol. The molar mass of an oxygen atom is ~15.999995, which is pretty much 16. Since oxygen is diatomic, you would multiply the molar mass of one atom by two (16 x 2) to get 32 g/mol

Answer: 32 g/mol

Explanation:

According to Avogadro's law, 1 mole of every substance contains avogadro's number [tex](6.023\times 10^{23})[/tex] of particles and weighs equal to its molecular mass.

Diatomic molecule is a molecule formed by combination of two atoms of the same element. Example: [tex]O_2[/tex]

1 mole of oxygen [tex]O_2[/tex] molecule contains = 2 moles of oxygen atoms

1 mole of oxygen atom weigh= 16 g

2 moles of oxygen atoms weigh =[tex]\frac{16}{1}\times 2=32 g[/tex]

Thus 1 mole of oxygen molecule weigh 32 g.

Answer:

Absolute zero is the lowest possible temperature of a gas.

Explanation:

Absolute zero is the lowest possible temperature, at which all molecular motion theoretically stops. Its actual implications, especially concerning the volume of a gas, don't fully comply with classical interpretations and delve into the realm of quantum physics.

Absolute zero is the lowest possible temperature at which all molecular motion ceases. It is defined as 0 on the Kelvin scale and equivalent to -273.15 degrees Celsius. This temperature is theoretically the point at which a gas would have no kinetic energy.

It's important to understand that while at temperatures near absolute zero, the behavior of real gases deviates from that predicted by ideal gas laws like Charles's Law or Amonton's Law. These deviations occur because the volume of the gas molecules themselves becomes appreciable relative to the total volume occupied by the gas and the collisions between the molecules can no longer be ignored.

However, these assumptions become less valid as temperatures approach absolute zero. The volume of a gas at absolute zero is a matter of quantum physics, and doesn't strictly comply with classical interpretations of gas behavior.

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B is fasho the answer thank me later, It's not C because it can be used as a drying agent but not all hygroscopic substances are Drying agents and It also can be A

Answer:

Explanation:

It is D. All of the above

Answer : The correct option is, [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Explanation :

Redox reaction or Oxidation-reduction reaction is the reaction in which the oxidation and reduction reaction takes place simultaneously.

Reduction reaction : The reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

Oxidation reaction : The reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

The given balanced chemical reaction is :

[tex]Mg(s)+Fe^{2+}(aq)\rightarrow Mg^{2+}(aq)+Fe(s)[/tex]

The oxidation-reduction half reaction will be :

Oxidation : [tex]Mg\rightarrow Mg^{2+}+2e^-[/tex]

Reduction : [tex]Fe^{2+}+2e^-\rightarrow Fe[/tex]

In this reaction, the oxidation state of 'Mg' changes from (0) to (+2) that means Mg lost 2 electrons and it shows oxidation and the oxidation state of 'Fe' changes from (+2) to (0) that means Fe gains 2 electrons and it shows reduction.

Therefore, the correct option is, [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Answer:

Rogue waves could safely be classified alongside mermaids and sea monsters. ... A rogue wave is one that is at least twice the "significant wave height", which refers to the average of the third highest waves in a given period of time Rogues, called 'extreme storm waves' by scientists, are those waves which are greater than twice the size of surrounding waves, are very unpredictable, and often come unexpectedly from directions other than prevailing wind and waves.

Most reports of extreme storm waves say they look like "walls of water." They are often steep-sided with unusually deep troughs.

Since these waves are uncommon, measurements and analysis of this phenomenom is extremely rare. Exactly how and when rogue waves form is still under investigation, but there are several known causes:

Constructive interference. Extreme waves often form because swells, while traveling across the ocean, do so at different speeds and directions. As these swells pass through one another, their crests, troughs, and lengths sometimes coincide and reinforce each other. This process can form unusually large, towering waves that quickly disappear. If the swells are travelling in the same direction, these mountainous waves may last for several minutes before subsiding.

Focusing of wave energy. When waves formed by a storm develop in a water current against the normal wave direction, an interaction can take place which results in a shortening of the wave frequency. This can cause the waves to dynamically join together, forming very big 'rogue' waves. The currents where these are sometimes seen are the Gulf Stream and Agulhas current. Extreme waves developed in this fashion tend to be longer lived.

Explanation:

They are all nonmetals

The fluorine, iodine, and chlorine are c) They are similar to noble gases.

Nobel gas refers to those substances which doesn't have any vacant shell. They are completely filled. They are electron haters and are really hard to make them involve in chemical reaction. On the other hand, gases such as chlorine, bromine and iodine are called as halogens. They have ability to accommodate one electron in their valence shell as they have 7 already.

Thus, it can be inferred that gases such as chlorine, bromine and iodine are not similar to Nobel gas and thus the statement C which states they are similar to Nobel gas is considered as false.

Answer:

45) the answer is C.

46) The calculation of quantities in chemical reaction is called Stoichiometry .

47) The phase changed from solid to gas so I think the answer is A.

48) The phase changed from solid to gas as well so I think that the answer is A again.

49) Applying the formula n = m/M, we have n = 1.5 moles, therefore the answer is D.

50) C2H4 + 3O2 -> 2H2O + 2CO2

The answer is C.

51) The answer is C.

52) 2NaHCO3 + CaCl2 -> CaCO3 + H2O + 2NaCl + CO2

Hopefully I got all of them correct.

Gamma decay is usually represented by the Greek letter gamma (">gamma"). In the nuclear equation for the decay of boron-12, which emits a beta particle and a gamma ray, the resulting daughter isotope is carbon-12.

In nuclear chemistry, gamma decay is often represented by the Greek letter gamma ">">">">">

^12B -> ^12C + e- + ">gamma">">The starting isotope is boron-12 (^12B). During the decay, a beta particle (e-) is emitted, which is essentially an electron, and a gamma ray is emitted as well. The resulting or daughter isotope is carbon-12 (^12C).

It's essential to memorize the symbols and notations for different types of radioactive decay, as they are commonly used in nuclear chemistry calculations. The emission of gamma rays typically accompanies other types of radioactive decay, such as alpha or beta decay, rather than occurring alone. Therefore, when writing nuclear equations, the presence of a gamma ray is shown by adding the gamma symbol to the equation.

The answer is:

The new volume is 2.84 L.

[tex]V_{2}=2.84L[/tex]

To solve the problem, we need to remember what STP means. STP means that the gas is at standard temperature and pressure, or 273.15 K (0°C) and 1 atm.

Also, we need to use the Combined Gas Law, since the temperature, the pressure and the volume are being changed.

The Combined Gas Law establishes a relationship between the temperature, the pressure and the volume of an ideal gas using , Gay-Lussac's Law, Charles's Law,  and Boyle's Law.

The law is defined by the following equation:

[tex]\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}[/tex]

Where,

[tex]P_{1}[/tex] is the first pressure.

[tex]V_{1}[/tex] is the first volume.

[tex]T_{1}[/tex] is the first temperature.

[tex]P_{2}[/tex] is the second pressure.

[tex]V_{2}[/tex] is the second volume.

[tex]T_{2}[/tex] is the second temperature.

So, we are given the following information:

[tex]V_{1}=2L\\P_{1}=1atm\\T_{1}=0\°C=273.15K\\P_{2}=80kPa=0.8atm\\T_{2}=37\°C=37+273=310K[/tex]

Then, isolating the new volume, and substituting, we have:

[tex]\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}\\\\V_{2}=\frac{P_{1}V{1}}{T_{1}}*\frac{T_{2}}{P_{2}}\\\\V_{2}=\frac{1atm*2L}{273.15K}*\frac{310K}{0.8kPa}=2.84L[/tex]

Hence, the new volume is 2.84 L.

[tex]V_{2}=2.84L[/tex]

Have a nice day!

it will  produce aluminum hydride and lithium chloride.

AlCl3 + 3LiH → AlH3 + 3LiCl

The populations are isolated and thus do not interbreed.

Answer:B

Answer:

The populations are isolated and thus do not interbreed.

Explanation:

Answer:

Explanation:

In simplest terms, the fastest moving ones that are closest to the surface.

The particles with the highest kinetic energy are the first to evaporate from a liquid.

Lunar eclipse

A solar eclipse is when the Moon is between the Earth and the Sun, and a lunar eclipse is when the Earth is between the Moon and the Sun.

Answer: 0.548J/g°C

Explanation:

Q = s × m × DeltaT

Q = Heat (J)

S = Specific Heat Capacity

M = mass (g)

DeltaT = Change in temperature (°C)

0.158Kg x 1000 = 158g

2.510J = s x 158g x (61°C-32°C)

2.510J/(158g x 29°C) = s

S = 0.54779.... J/g°C

S = 0.548 J/g°C

Answer:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Explanation:

3H₂ + N₂ → 2NH₃

it is clear that 3mol of hydrogen react with 1 mol of Nitrogen to give 2 mol of ammonia.

for H₂:

number of moles = mass / molar mass = (7.00 g) /  (2.00 g/mol) = 3.5 mol.

for N₂:

number of moles = mass / molar mass = (70.00 g) /  (28.00 g/mol) = 2.5 mol.

using cross multiplication

1 mol of  N₂ needs → 3 mol of H₂

2.5 mol of  N₂ needs → ??? mol of H₂

∴ the number of mol of H₂ needed = (3*2.5) / 1 = 7.5 mol

So, the right choice is:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Answer:

Its A

Explanation:

Answer:

height above sea level---->altitude

continent/ocean-----> geography

latitude---->temperature

moisture available --->rainfall

in ocean-->currents

Explanation: no

Hope this helps!

Correct match pair for altitude is sea level, for continent is geography, for latitude is temperature, for moisture is rain fall and for ocean is currents.

A wind wave, also known as a wind-generated wave, is a water surface wave that occurs on the free surface of bodies of water in fluid dynamics. Wind waves are created when wind blows across a fluid surface.

Hence correct matches are shown above.

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Answer:

C

Explanation:

In the described scenario, red is a dominant trait which manifests more frequently in the plants, whereas blue is a recessive trait which appears less often. Hence, the correct option is C.

In a certain variety of plants where red flowers appear in the majority of plants and blue flowers appear only in a few, the correct description of the two traits would be that red is a dominant trait and blue is a recessive trait. This is because dominant traits are those that are expressed or visible in the organism when at least one dominant allele is present. Conversely, recessive traits require both alleles to be recessive in order to be expressed. Since red flowers are more common, it suggests that the red-flower trait is dominant over the blue-flower trait which is recessive and appears less frequently.

Answer:

The bottom is troposhere the next is sratoshere,mesosphere,thermosphere then exoshere

Explanation:

The study of the atmosphere is called metrology. There are different types of components present in the atmosphere and these are gases and impure particles.

According to the question, the layers name is as follows:-

Hence, the answer is mentioned above.

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Answer:

= 115.898 kJ

Explanation:

Heat evolved in converting 2.00 mol of steam at 150 ∘C to ice at -55.0 ∘C

Will be calculated in steps

Step 1; Heat evolved by steam from 150°C to 100°C

Heat = (2×18) g × 1.84 J/g°C × (150 -100)

       = 3312 Joules

Step 2; Heat required to convert steam to water without change in temperature;

Heat = moles × Molar Latent heat of vaporization.

        =  2 moles × 4.07 ✕ 104 J/mol

        = 8.14 × 10^4 Joules

Step 3: Heat evolved by water  from 100°C to 0°C.

Heat = mass × specific heat capacity × ΔT

        = (2 × 18) × 4.18 J/g°C × 100

        = 15,048 Joules

Step 4; Heat evolved in converting water at 0°C to ice at 0°

Heat = number of moles × molar latent heat of fusion

        = 2 moles × 6000 j/mole

        = 12 000 Joules

Step 5, heat evolved in converting ice at 0°C to -55°C

Heat = mass × specific heat capacity × ΔT

        = (2×18) × 2.09 j/g°C × 55

        = 4138.2 Joules

Total amount of heat evolved;

= 3312 J +  8.14 × 10^4 J + 15,048 J + 12 000 J +  4138.2 J

= 115,898.2 joules

= 115.898 kJ

To find the heat evolved in converting steam to ice, we need to consider the heat absorbed in three steps: heating the steam to 0°C, melting the ice, and finally cooling the water to -55.0°C. The heat evolved is approximately 235.92 kJ.

To find the heat evolved in converting steam to ice, we need to consider the heat absorbed in three steps: heating the steam to 0°C, melting the ice, and finally cooling the water to -55.0°C. We can calculate the heat absorbed in each step using the given heat capacities of steam and ice.

First, we calculate the heat absorbed in heating the steam from 150°C to 0°C. The formula for calculating heat is Q = mcΔT, where Q is the heat, m is the mass, c is the heat capacity, and ΔT is the change in temperature. 

The heat absorbed in heating the steam is Q = (2.00 mol)(18.02 g/mol)(1.84 J/g°C)(0 - 150°C) = -5,232.48 J. Since heat is leaving the system, the heat absorbed is a negative value.

Next, we calculate the heat absorbed in melting the ice at 0°C. The formula for calculating heat is Q = mL, where Q is the heat, m is the mass, and L is the heat of fusion. 

Using the given information, the heat absorbed in melting the ice is Q = (100 g)(2.09 J/g°C) = 209.0 J.

Finally, we calculate the heat absorbed in cooling the water from 0°C to -55.0°C. The formula for calculating heat is Q = mcΔT, where Q is the heat, m is the mass, c is the heat capacity, and ΔT is the change in temperature. 

The heat absorbed in cooling the water is Q = (100 g)(4.18 J/g°C)(-55.0 - 0°C) = -229,900 J. Since heat is leaving the system, the heat absorbed is a negative value.

To find the total heat absorbed in all three steps, we add the heats together: -5,232.48 J + 209.0 J - 229,900 J = -235,923.48 J.

To convert the heat from joules to kilojoules, we divide by 1000: -235,923.48 J / 1000 = -235.92 kJ.

Therefore, the heat evolved in converting 2.00 mol of steam at 150°C to ice at -55.0°C is approximately 235.92 kJ.

Answer:

A. by lowering the activation energy

Explanation:

Answer:

A. By Lowering the activation energy

Explanation

edmentum/plato family!

give me likes plz!

Answer:

The cube will contain 8000 mL of the fluid.

Explanation:

where, L is the edge length.

∴ V of the cube = L³ = (20.0 cm)³ = 8000 cm³.

Knowing that 1.0 cm³ = 1.0 mL.

∴ The cube will contain 8000 mL of the fluid.

Answer:

12 moles of cesium xenon heptafluoride

Explanation:

The reaction of cesium fluoride with xenon hexafluoride is CeF + XeF6 -> CeXeF7 and the reaction is balanced as written. So the mole ratio is 1:1:1. We are given 12 moles of CeF and 14 moles of XeF6 are reacting, but after the 12 moles of CeF react completely, the reaction will stop as we have run out of one of our reactants. So only 12 moles of CeXeF7 will be produced.

Final answer:

12 moles of cesium xenon heptafluoride can be produced from the reaction of 12 mol cesium fluoride with 14 mol xenon hexafluoride, assuming a 1:1 molar ratio in the reaction and complete consumption of reactants.

Explanation:

To determine how many moles of cesium xenon heptafluoride (CsXeF₇) can be produced from 12 mol cesium fluoride (CsF) with 14 mol xenon hexafluoride (XeF₆), we first need to know the balanced chemical reaction. This reaction can be expressed as:

CsF + XeF₆ → CsXeF₇

If we assume 100% efficiency and that all reactants are used up completely, we would expect 12 moles of CsF to fully react with 12 moles of XeF6 since the reaction is in a 1:1 molar ratio. Therefore, the amount of product formed, CsXeF₇, would be 12 moles. The remaining 2 moles of XeF₆ will not react as there is no additional CsF to react with.

Answer:

MgSO₄(aq) + CaCl₂(aq) → CaSO₄(s) + MgCl₂(aq).

Explanation:

MgSO₄(aq) + CaCl₂(aq) → CaSO₄(s) + MgCl₂(aq).

The products are calcium sulfate and magnesium chloride.

Final answer:

In the reaction between Magnesium Sulfate and Calcium Chloride, a double displacement reaction occurs, forming solid Calcium Sulfate (a precipitate) and Magnesium Chloride in solution.

Explanation:

When Magnesium Sulfate and Calcium Chloride are mixed together in an aqueous solution, a double displacement reaction, also known as a precipitation reaction, occurs. The chemical equation for this reaction is:

MgSO₄(aq) + CaCl₂(aq) → CaSO₄(s) + MgCl₂(aq)

In this reaction, the ions of magnesium and calcium will exchange their respective anions, sulfate, and chloride. This results in the formation of solid Calcium Sulfate (CaSO₄), a precipitate, and Magnesium Chloride (MgCl₂) in aqueous solution.

Answer:

612 g

Explanation:

concentration or molarity is the number of moles of solute in 1 L of solution

the molarity of the solution is 12.5 M

therefore there are 12.5 mol in 1 L of solution

in 1 L of solution there are 12.5 mol

therefore in 3.5 L there are - 12.5 mol/L x 3.5 L = 3.6 mol

molar mass of AgNO₃ is 170 g/mol

mass of 3.6 mol of AgNO₃ is - 170 g/mol x 3.6 mol = 612 g

612 g of AgNO₃ is needed to make a 12.5 M solution

As pressure increases volume decreases

As temperature increases pressure increases

As volume increases temperature increases

Explanation:

in the first statement as pressure increases it compresses the volume of the object decreasing it

In the second statement when temperatures increase so does the pressure like when you heat a closed bottle or placed hot water in and you try to open it,it tends to burst

In the third statement when volume increases temperature also increases because it expands when heated