The final volume is when the 400 ml of 0.6 M HCl is diluted to the 0.5 M HCl is 480 mL.
The initial molarity of the solution , M₁ = 0.6 M
The initial volume of the solution, V₁ = 400 mL
The final molarity of the solution, M₂ = 0.5 M
The final volume of the solution, V₂ = ?
The dilution law is expressed as :
M₁ V₁ = M₂ V₂
V₂ = M₁ V₁ / M₂
V₂ = ( 0.6 × 400 ) /0.5
V₂ = 480 mL
Thus, the final volume of the solution is 480 mL with the molarity of the 0.5 M.
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explain why the masses of fecl3 in the two graduated cylinders are different
Different FeCl3 masses in two graduated cylinders can happen for a variety of causes. Here are a few potential causes: Error in measurement, Evaporation, Contamination, Concentration variations, State of hydration.
FeCl3 is a chemical compound made up of iron and chlorine, often known as iron(III) chloride or ferric chloride. It can take electrons from other molecules and create coordinate covalent connections because it is a strong Lewis acid. FeCl3 is frequently employed in laboratory settings for various chemical reactions, such as the production of organic molecules, as well as industrial applications like water treatment. Printed circuit boards are also made using it as an etchant. FeCl3 is a crystalline, dark brown solid that dissolves in water. The hue of its solutions is frequently yellow to brown. By combining iron and hydrochloric acid, it can be made.
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______ The aggregation of nonpolar molecules or groups in water is thermodynamically favorable due to theA. increased entropy of the water molecules.B. decreased enthalpy of the system.C. increased entropy of the nonpolar molecules when they associate.D. very strong van der Waals forces among the nonpolar molecules or groups.What is the pH of an acetate/acetic acid solution (pKa= 4.7) in which acetic acid is 80% in its deprotonated form?
The aggregation of nonpolar molecules or groups in water is thermodynamically favorable due to the increased entropy of the nonpolar molecules when they associate. The pH of the acetate/acetic acid solution is 5.3. Option C is correct.
The nonpolar molecules tend to minimize their contact with water molecules, which increases the overall disorder or entropy of the system.
To calculate the pH of an acetate/acetic acid solution with a pKa of 4.7 and in which acetic acid is 80% in its deprotonated form, we can use the Henderson-Hasselbalch equation:
pH = pKa + log([A⁻]/[HA])
where [A⁻] is the concentration of the acetate ion and [HA] is the concentration of acetic acid.
We know that the solution is 80% in its deprotonated form, which means that [A⁻]/[HA] = 4/1 (since there are 4 deprotonated acetate ions for every 1 protonated acetic acid molecule).
Substituting the values into the equation, we get:
pH = 4.7 + log(4/1) = 4.7 + 0.6 = 5.3
Hence, C. increased entropy of the nonpolar molecules when they associate is the correct option.
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Which of the following describes the greenhouse effect?
Answer:
A
Explanation:
because its what the greenhouse effect is
Answer:
A
Explanation:
that's the one which best meets the definition of green house effect
why do we not worry about being constantly bombarded by radio waves, but we guard our exposure to uv radiation?
We do not worry about being constantly bombarded by radio waves, but we guard our exposure to UV radiation their much higher energies cause all kinds of problems because their much higher energies cause all kinds of problems.
What are UV radiations ?The sun and artificial sources, such tanning beds, both emit ultraviolet (UV) radiation, a kind of non-ionizing radiation. Although it helps humans in certain ways, such as by producing vitamin D, there are also potential health hazards.
We don't mind being surrounded by radio waves almost constantly, but we are very careful about how much gamma, X, and UV radiation we are exposed to because of how their considerably higher energy can mess with our chemistry.
Thus, we do not worry about being constantly bombarded by radio waves, but we guard our exposure to UV radiation.
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what is hcn polar or nonpolar ?
The HCN that is the hydrogen cyanide is the polar compound. The molecule of the hydrogen cyanide is not the symmetric.
The Hydrogen cyanide consists of the linear structure. It has the carbon atom that lies in between the hydrogen and the nitrogen atoms. There are the two polar bonds present in the hydrogen cyanide. The Hydrogen cyanide is the polar compound. The molecule is not the symmetric. The nitrogen atom and the hydrogen atom have the different electronegativities, that will create the uneven pull on the electrons. Therefore there is a net dipole moment.
Thus, The HCN is the polar compound.
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searching for simple machines list two of each type of simple machines
Answer:
Rollers pully
Explanation:
When using acids and bases, note that these substances are _______. Make every effort to avoid contact with ________. Be sure to wipe up any spills _________.
When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with skin, eyes, and clothing. Be sure to wipe up any spills immediately.
Acids and bases are corrosive substances, which means they can cause damage to living tissues and other materials they come into contact with. Therefore, it is essential to take precautions when handling them.
Firstly, it is important to avoid any contact with skin, eyes, and clothing. If you do come into contact with an acid or base, immediately rinse the affected area with plenty of water for at least 15 minutes and seek medical attention if necessary.
Secondly, any spills should be cleaned up immediately to prevent further damage or harm. You should wear appropriate protective equipment, such as gloves and safety goggles, when handling these substances to reduce the risk of exposure.
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which equation represents the integrated rate law for a zero-order reaction?
a. at=-kt+a0
b. 1/a=kt+1/a0
c. t=.693/k
d. lna=-kt+lna
The equation represents the integrated rate law for the zero-order reaction is at = - kt + a0. The correct option is a.
The integrated rate equation for the zero-order reactions is the equation name given to the equation. The integrated rate law for a zero-order reaction is as follows :
at = - kt + a0
The above equation is the equation that is known as the integrated rate equation for the zero order reactions. The zero - order reaction is the one whose rate is the independent of the concentration, its the differential rate law that is rate = k. This refer to the reactions as the zero order because we could also write the rate in the form such that the reactant in the rate law is the 0. Therefore, option a is correct.
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Luke surmised the causes of earthquakes with the following sentences "Earthquakes have both natural causes like volcanoes faults and landslides and human causes like mining explosion's, nuclear testing and tectonic plate subduction." what needs to be corrected?
A. Volcanoes do not causes earthquakes
B. Subduction is a natural cause, not human made
C. Tectonic plate subduction does not cause earthquake
D. Faults are human made causes, not natural causes
Pleases explain why your awnser is correct.
The majority of natural earthquakes occur on fault lines, which are typically (but not always) located where tectonic plates collide in earth.
What is Earth.The Earth and its moon formed at the same time as the other planets in the solar system. That incident occurred 4.5 trillion years ago, according to estimates. Earth is the fifth-largest planet in the solar system. Despite only being the sixth largest planet overall, Earth is the only exoplanet that has liquid water on its surface.
What is a solar system?A planetary system. These planets and celestial bodies are attracted to the Sun and revolve around it. Our solar system is made up of Jupiter, Venus, Earth, Mars, and the Sun, a typical star.
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what is sulfur trioxide formula
Sulfur trioxide's chemical name is SO3. That is accurate, indeed. Three oxygen atoms and one sulphur atom make up the chemical compound trioxide, which has the formula SO3. It also goes by the name sulphur
With the chemical formula SO3, sulphur trioxide, sometimes referred to as trioxide, is a highly reactive and corrosive substance. It is a colourless to white crystalline substance that easily transforms into sulfuric acid when exposed to water. Sulfur dioxide and oxygen react in the presence of a catalyst, such as vanadium pentoxide, to form trioxide in an industrial setting. It is employed in the production of sulfuric acid, one of the most significant industrial compounds having several uses across numerous industries. Trioxide is used in a variety of specialised processes, including the creation of synthetic textiles and pigments. Nonetheless, trioxide has to be handled carefully and with the right safety precautions
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weather balloon has a volume of 4,500 L at STP. What volume, in L, will it have at 18,000 feet where the temperature is -45°C and the pressure is 0.485 atm?
The volume of the weather balloon at 18,000 feet will be 2,567 L.
What is volume?
In physics and chemistry, volume refers to the amount of space that a substance or object occupies in three dimensions. It is typically measured in units such as liters (L) or cubic meters (m³), depending on the size and scale of the object being measured.
To solve this problem, we can use the combined gas law, which relates the pressure, temperature, and volume of a gas:
(P1V1)/T1 = (P2V2)/T2
where P1, V1, and T1 are the initial pressure, volume, and temperature (STP), and P2, V2, and T2 are the final pressure, volume, and temperature.
At STP, the temperature is 0°C or 273 K and the pressure is 1 atm. We can use these values to find the initial volume:
(P1V1)/T1 = (P2V2)/T2
(1 atm)(4,500 L)/(273 K) = (P2)(V2)/(228 K)
V2 = (P2)(4,500 L)(228 K)/(1 atm)(273 K)
Now we need to convert the temperature and pressure at 18,000 feet to Kelvin and atmospheres, respectively. To convert -45°C to Kelvin, we add 273 to get 228 K. To convert 0.485 atm to atmospheres, we divide by 1 atm to get:
P2 = 0.485 atm / 1 atm = 0.485
Now we can substitute these values into the equation to find the final volume:
V2 = (0.485)(4,500 L)(228 K)/(1 atm)(273 K)
V2 = 2,567 L
Therefore, the volume of the weather balloon at 18,000 feet will be 2,567 L.
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If 82.16 grams of lithium metal react with excess water, how many liters of hydrogen gas will be produced at 232.05 Kelvin and 0.750 atmospheres? Lithium metal reacts with water to produce Lithium Hydroxide plus Hydrogen gas.
If 82.16 grams of lithium metal react with excess water, 13.1L of hydrogen gas will be produced at 232.05 Kelvin and 0.750 atmospheres.
What is volume?A measurement of three-dimensional space is volume. Several imperial or US customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively. Volume and length (cubed) have a symbiotic relationship.
The volume of something like a container is often thought of as its capacity, not as the amount of space it takes up. In other words, the volume refers to the amount of fluid (liquid or gas) that the container may hold.
2Li + 2H[tex]_2[/tex]O [tex]\rightarrow[/tex] 2LiOH + H[tex]_2[/tex]
Moles of lithium = given mass/ molar mass
= 82.16 / 6
= 13.6 moles
the mole ratio between lithium and hydrogen is 2 : 1
moles of hydrogen = 13.6/ 2 = 6.8moles
0.750 ×V = 6.8×8.314×232.05
V =13.1L
Therefore, 13.1L is the volume of hydrogen gas.
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Which combination of factors would result in the SLOWEST reaction rate?
1.0 M nitric acid at 30 degrees C with silver ribbon
2.0 M nitric acid at 20 degrees C with silver ribbon
1.0 M nitric acid at 20 degrees C with silver ribbon
The rate of a reaction generally depends on the reactant concentration and temperature. Here 1.0 M nitric acid at 20 degrees C with silver ribbon is found to has slowest reaction rate. The correct option is C.
What is rate of the reaction?The rate of a chemical reaction is defined as the rate of decrease of concentration of a reactant or the rate of increase of concentration of a product.
The rate of a reaction increases with the increase in the concentration of the reactants and when temperature increases, the kinetic energy of molecules increases which in turn increases the collision between them. Hence the reaction rate increases.
Thus the correct option is C.
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Hydrogen peroxide decomposes to form water and oxygen. The uncatalysed reaction has activation energy of 86 kJ/mol. The activation energy value in the presence of acetanilide is 112 kJ/mol and in the presence of MnO2 it is 49 kJ/mol. What conclusion can you draw from the above observation ?
The conclusion we can draw from the above observation is the given reaction will be proceed faster in the presence of the Manganese oxide as it activation energy of the reaction in the presence of the Manganese oxide is lesser .
The substance that is increases the rate of the reaction without the itself undergoing any of the permanent change chemically or the quantitatively is called the catalyst. The minimum energy in the excess of the normal energy that is the molecules will acquire so to react in the collision with the each other is called the activation energy.
2H₂O₂ ----> H₂O + O₂
The reaction occurs in the presence of the either acetanilide , Ea is 112 kJ/mol or the magnesium oxide ,Ea is 49 kJ/mol. the activation energy of the reaction in the presence of the Manganese oxide is lesser than in the presence of the acetanilide. Therefore, the given reaction will be proceed faster in the presence of the Manganese oxide .
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Which circuit is a series circuit? A. A Circuit has battery at top connected to three components across each other's leads B. Three components connected across each other to a common battery C. Two batteries connected to one component and switch across each other's leads D. A Battery connected to two components such that only one path for current to flow.
Answer:
THE CORRECT ANSWER IS D
Explanation:
A, B, and C are incorrect. I took the test so I know. Hope this helps
Why is understanding bonding important for understanding molecules
Answer:
Understanding bonding is important for understanding molecules because a molecule cannot exist without the bond between atoms.
Explanation:
What shape is a prism?
Explanation:
A prism is a solid geometric figure with two identical parallel bases that are both polygons, and the lateral faces are parallelograms with pairs of opposite sides of equal length.
Heat of combustion chemistry
The heat of combustion per gram of candle for each trial is:
Trial 1: Heat of combustion per gram = 30.8 kJ/gTrial 2: Heat of combustion per gram = 30.8 kJ/gTrial 3: Heat of combustion per gram = 26.4 kJ/gWhat is the heat of combustion per gram of candle for the trials?To calculate the heat of combustion per gram of candle for each trial, we use the formula below:
Heat absorbed, Q = mcΔT
where;
m is the mass of waterc is the specific heat capacity of water (4.184 J/g·°C)ΔT is the temperature changeSince the density of water is 1 g/mL, the volume of water = mass of water
Trial 1:
mass of candle burnt = 0.12 g
temperature change of water = 8.1° C
volume of water = 99.9 mL
Q = 99.9 * 4.184 * 8.1
Q = 3390 J or 3.39 kJ
The heat of combustion per gram = 3.39/0.12
The heat of combustion per gram = 28.3 kJ/g
Trial 2:
mass of candle burnt = 0.11 g
temperature change of water = 8.1° C
volume of water = 100 mL
Q = 100 * 4.184 * 8.1
Q = 3390 J or 3.39 kJ
The heat of combustion per gram = 3.39/0.11
The heat of combustion per gram = 30.8 kJ/g
Trial 3:
mass of candle burnt = 0.13 g
temperature change of water = 8.2° C
volume of water = 100.1 mL
Q = 100.1 * 4.184 * 8.2
Q = 3430 J or 3.43 kJ
The heat of combustion per gram = 3.43/0.11
The heat of combustion per gram = 26.4 kJ/g
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how many different kinds of h signals would be observed in the h-nmr in 2-methylcyclohexanol?
The H-NMR spectrum of 2-methylcyclohexanol would typically show at least three different H signals, corresponding to the OH proton, the methyl group, and the ring protons.
What is nuclear magnetic resonance (H-NMR) spectrum?The nuclear magnetic resonance (NMR) spectrum is a spectroscopic technique used to determine the molecular structure of a compound by analyzing the magnetic properties of its atomic nuclei.
In proton nuclear magnetic resonance (H-NMR) spectroscopy, the magnetic properties of the hydrogen nuclei (protons) in a molecule are measured. The technique is based on the principle that when a molecule is placed in a strong magnetic field, the protons align themselves either with or against the magnetic field, resulting in two possible spin states.
In the proton nuclear magnetic resonance (H-NMR) spectrum of 2-methylcyclohexanol, the number of different H signals (peaks) observed depends on the different types of proton environments present in the molecule.
2-methylcyclohexanol has several types of protons, which will produce distinct peaks in the H-NMR spectrum:
The OH proton will appear as a broad peak around δ 2.5-5.0 ppm due to its exchange with solvent protons.
The methyl (CH3) group on the cyclohexane ring will produce a singlet peak around δ 0.9-1.0 ppm.
The five protons on the cyclohexane ring will produce a complex splitting pattern, depending on their position and neighboring atoms.
In general, if the methyl group is located in an equatorial position, the ring protons will appear as two triplets (due to coupling with the neighboring axial protons) and one multiplet (due to coupling with the other ring protons). If the methyl group is located in an axial position, the ring protons will appear as a broad multiplet.
Therefore, the H-NMR spectrum of 2-methylcyclohexanol would typically show at least three different H signals, corresponding to the OH proton, the methyl group, and the ring protons.
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50 POINTS!! CAN SOMEONE PLEASEEEE HELP ME do this for my chemistry class please i need it done asap!! to give me the answers your probably going to have to write it on paper then attach the picture to your answer!! thank you so much!! <3
The chlorine atom only requires one more electron to fulfill its octet because the potassium atom only has one valence electron and has seven total electrons.
How do atoms work?Protons, positive charged particles, and neutrons, neutral charged particles, make up the nucleus of each atom. Around the nucleus are electrons, which are negative particles. Atoms of the same element share the same chemical characteristics and mass, but atoms of other elements have unique chemical characteristics and masses. Compounds are created when atoms join in ratios of few whole numbers.
Describe a compound?A compound is a substance made up of two or more types of elements together in a specific proportion of their atoms. As the components are combined, they interact with one another.
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Select the effect of the size of a sample on the melting point measurement
A) the larger the sample, the more accurate the measurement
B) the sample should not be large, because a large sample would produce a higher and broader mp range
C) the size of the sample doesn't affect the mp measurement
Option B is the correct effect of the size of a sample on the melting point measurement. A larger sample size can indeed produce a higher and broader melting point (mp) range.
This is because the temperature at which a solid melts can be affected by impurities or irregularities in the sample, and a larger sample size can increase the chances of such variations occurring. As a result, the melting point range can be less precise and may cover a wider range of temperatures, leading to a less accurate measurement. Therefore, it is important to use an appropriate sample size that is not too large, but also not too small, to obtain the most accurate and precise melting point measurement.
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What is H2SO4 as an acid?
With the chemical formula H2SO4, sulfuric acid is a powerful, mineral acid that is extremely corrosive. It is a viscous, colourless to slightly yellow, pungent-ethereal liquid that is always soluble in water.
It may occasionally be darkened during manufacture to draw attention to its dangers. "Oil of vitriol" is the name given to this acid historically. Sulfuric acid that has been concentrated is 98% pure and exhibits various characteristics depending on the concentration.
Because of the high exothermic nature of sulfuric acid's hydration process, we should do dilution by adding acid to water rather than vice versa. Due to its strong affinity for water, pure sulfuric acid does not occur naturally on Earth in its anhydrous state.
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what is the aspirin generic name?
Aspirin's generic name is acetylsalicylic acid, which is a pain reliever, fever reducer, and anti-inflammatory medication.
Ibuprofen is a broadly utilized drug with different properties including relief from discomfort, fever decrease, and mitigating impacts. Its conventional name is acetylsalicylic corrosive, which is a kind of salicylate drug that works by hindering the creation of prostaglandins, which are liable for causing torment, irritation, and fever. Ibuprofen is generally used to treat migraines, muscle and joint agony, feminine spasms, and different sorts of torment. It is additionally used to decrease the gamble of coronary failure, stroke, and blood coagulating. Ibuprofen is available without a prescription in many structures, including tablets, cases, and fluids, and is viewed as a protected and powerful drug when utilized as coordinated.
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step 2 is _____________ because the energy _________ when carbon-oxygen bonds form is greater than the energy _________ when carbon-carbon and oxygen-oxygen bonds are broken.
The energy required to produce carbon-oxygen bonds is more than the energy released when carbon-carbon and oxygen-oxygen connections are broken, making step 2 endothermic.
How much energy does the bond between carbon and oxygen have?Each of the double bonds between the carbon and oxygen atoms has a bond energy of 187 kcal. The carbon atom shares two pairs of electrons with each oxygen atom (or about 93 kcal for each shared pair of electrons). More energy is required to break a connection with a higher bond energy.
Energy is what remains when a relationship is broken?Energy is released once the link is broken. Light, heat, or kinetic energy can all be used to disrupt chemical bonds.
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what is molar mass of sucrose?
The molar mass of the sucrose , that is the C₁₂H₂₂O₁₁ is 342.3 g/mol.
The molar mass of the sucrose that is C₁₂H₂₂O₁₁ is as follows :
The molar mass of the sucrose, C₁₂H₂₂O₁₁ = 12(12) + 22 (1) + 11 (16)
The molar mass of the sucrose, C₁₂H₂₂O₁₁ = 342.3 g/mol
The Sucrose is the molecule that is composed of the two monosaccharides, that are the glucose and the fructose. The formula for the non-reducing disaccharide is C₁₂H₂₂O₁₁. The Sucrose is commonly called as the table sugar or the cane sugar. In the molecule of the C₁₂H₂₂O₁₁, the fructose and the glucose molecules both are connected through a bond called a glycosidic bond.
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2) How many atoms are in 238.4 g of Aluminum?
To find the number of atoms in 238.4 g (Al), we can convert the mass into number of moles, using molar mass, (found on a standard IUPAC periodic table) and thus, multiply this result by Avogadro's Constant, 6.022×10²³, i.e. the number of 'items' in a mole (atoms, molecules, ions, etc...).
n(Al) = mass present (g) ÷ molar mass of aluminium (g/mol)
n(Al) = m/M = 238.4/26.98 = 8.836 mol (4 sig. fig.)
N(Al) = number of moles × Avogadro's Constant
∴ N(Al) = 8.836 × 6.022×10²³ = 5.321×10²⁴ atoms of aluminium
Is F2 a polar or nonpolar molecule and why? Electronegativity Values Electronegativity Element fluorine 4.0 Select one: a. F2 is a polar molecule because it has nonbonding electrons. b. F2 is a nonpolar molecule because the F-F bond is nonpolar. c. F2 is a nonpolar molecule because the F-F bond is polar. d. F2 is a polar molecule because the F-F bond is polar
F₂ is a non-polar molecule because the F-F bond is nonpolar in nature.
Electronegativity is the tendency of an element to attract the shared pair of electron towards itself in a covalent compounds or molecules.
When F-F bond is formed then due to same electronegativity of both atoms electron pair remain in the mid of two F atoms, there is no separation of charge and therefore no polarity that is bond become polar.
The molecule F₂ is considered as a nonpolar molecule as it consists of 2 F atoms which concludes that there is zero electronegativity difference.
Hence, option B is correct.
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A chef finds a sealed container consisting of an ingredient that goes into his restaurant’s secret sauce. The ingredient’s molecules are moving in place. What will happen if the chef causes the ingredient to change phase by transferring energy into it?After the phase change, the ingredient’s molecules will move . . .answer choicesa. faster, and the ingredient will be a solid.b. faster, and the ingredient will be a liquid.c. slower, and the ingredient will be a solid.d. slower, and the ingredient will be a liquid.
If the chef applies energy to the sauce, it will changes to liquid state, as the particles from the gels state move faster apart and reduces their intermolecular attraction forming the liquid phase.
What is phase change ?The phase change of a material is a physical change in which the material changes from one state of matter to the other. For example boiling, melting or vaporizing are all phase changes.
In solid state the particles are closely packed by strong intermolecular forces. In liquids , particles have some more space to flow apart. In gaseous state the particles are far apart and free to diffuse anywhere.
When the gelly sauce is heated the particles are absorbing enough energy to weaken the intermolecular force of attraction. They gain kinetic energy to move faster and form a liquid state.
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how did the amount of carbon absorbed by the hydrosphere compare to the amount carbon released by the hydrosphere in 2010?
According to the given statement Less carbon was absorbed by the biosphere than the hydrosphere.
What is carbon used for?Impure carbon is used in the smelting of metals in the form of coal- and wood-based coke and charcoal. Particularly for the production of steel, it is essential. Electric motor brushes, furnace linings, and pencils all use graphite. Processes for filtration and purification use activated charcoal.
What makes carbon vital to life?Without carbon, life on earth wouldn't be conceivable. This is partly because carbon can easily make bonds with other atoms, allowing biomolecules like DNA and RNA, which are crucial for the development and replication that characterize life, to take on a variety of shapes and functions.
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Arrange the different types of electromagnetic radiation by wavelength. Only include the items that are forms of electromagnetic radiation. longest wavelength shortest wavelength Answer Bank low frequency X-rays a high pitch sound wave high frequency X-rays red light gamma ray radiation infrared radiation Lowest frequency Highest frequency Answer Bank long-wavelength ultraviolet radiation a red photon an X-ray photon a blue photon short-wavelength ultraviolet radiation a water wave
The sunlight is a form of electromagnetic energy. The visible light is only a small portion of the electromagnetic spectrum. The electromagnetic spectrum consists of different range of frequencies.
What is electromagnetic spectrum?The electromagnetic spectrum consists of a large number of electromagnetic radiations which further consists of many subranges commonly referred to as portions. These can be again classified into infra-red radiation, visible light or ultraviolet radiation.
Each type of radiation has its own specific wavelength and frequency. The increasing order of wavelengths of electromagnetic radiation is given as:
Gamma rays < X rays < UV rays < Infrared rays < Microwaves < Radiowaves.
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