The conversion that take place is solar energy to heat energy.
The energy conversion that occurred in the classroom oven was from solar energy to heat energy. Radiant energy, also known as solar energy, is the heat from the sun that heats the oven. The hotdog becomes hot and ready to eat when the internal temperature of the oven rises with the help of aluminium foil because the absorbing heat energy accumulates inside the oven more quickly than it is lost. Light energy to heat energy conversion: Solar cookers aim sunlight at a target, like a cooking pan. Conduction is the process by which light energy is transformed into heat by interacting with the receiver material. Utilizing materials that conduct and hold heat improves conversion.
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Molecular solids are those solids whose composite units are molecules. Molecular solids are held together by the following kinds of intermolecular forces: , and bonding. Ionic solids are those solids whose composite units are ions. Ionic solids are held together by . Atomic solids are those solids whose composite units are . Atomic solids can themselves be divided into three following categories, where each is held together by a different kind of force. The first category, which includes only the noble gases in their solid form and is held together by relatively weak , is atomic solids. The second category, which is held together by bonds and includes such examples as copper or silver, is atomic solids. The last category, which is held together by and includes such examples as diamond, graphite, and silicon dioxide, is atomic solids.
Molecular solids are solids composed of molecules. Intermolecular forces like hydrogen bonds, dipole-dipole forces, and dispersion forces hold molecular solids together. Ionic solids are solids that contain ions as constituents. Ionic solids are held together by ion-dipole forces. Atomic solids are those whose entire structure is made up of atoms. Atomic solids are classified into three types, each of which is held together by a unique set of forces. Forces of dispersion The first category is atomic solids, which only consists of noble gases in their solid states and is held together by relatively weak coulombic forces. Metallic atomic solids fall into the second category, which is held together by nonbonding bonds and includes elements such as copper and silver. The final group of materials held together by covalent bonds is network covalent atomic solids, which include silicon dioxide, graphite, and diamond.
What are the five intermolecular forces?There are three types of intermolecular forces: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Regardless of whether molecules have any combination of these three types of intermolecular forces, all substances have LDF.
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Complete question in the image:
plese hurrrrhy
What is most responsible for the trend seen in the populations of large canopy trees and grass? 100 points
Question 6 options:
Rainfall Factors
Biotic Factors
Population Factors
Abiotic Factors
Explanation:
Abiotic factors such as rainfall, temperature, and soil conditions are the most responsible for the trend seen in the populations of large canopy trees and grass. Rainfall can affect the growth and survival of plants, and variations in temperature can influence the distribution of species. Soil conditions, such as nutrient levels and pH, can also play a role in determining which plants can thrive in a given area. Biotic factors, such as competition among plants and herbivory, can also influence the population trend of large canopy trees and grass, but these are typically driven by abiotic factors.
The trend seen in the populations of large canopy trees and grass is most likely due to abiotic factors, specifically changes in climate and temperature.
What are the habitats of canopy tress ?Large canopy trees typically require specific environmental conditions, such as adequate rainfall, humidity, and moderate temperatures, to thrive. As climate patterns shift and temperatures increase, these conditions may no longer be present in certain areas, which can result in a decline in the population of large canopy trees.
Similarly, grass populations are also influenced by changes in temperature and rainfall patterns. Grasses are adapted to grow in specific conditions, and as these conditions change, their populations can be impacted.
For example, prolonged drought conditions can lead to a decline in grass populations, while increased rainfall can promote growth.
While biotic factors such as competition between species and population dynamics can also influence the trend seen in the populations of large canopy trees and grass, abiotic factors are generally considered to be the primary drivers of these trends.
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heat a beaker of water when a gas line is not available to power any equipment
Heat a beaker of water when a gas line is not available to power any equipment : Hot plate
What is Gas?One of the four basic states of matter, along with solid, liquid, and plasma, is gas. Individual atoms, elemental molecules derived from a single kind of atom, or complex molecules derived from a number of atoms can all be found in a pure gas. A variety of pure gases can be found in a gas mixture like air.In spite of gravity and regardless of the amount of substance present, a gas is a sample of matter that adopts the shape of the container in which it is housed and develops a uniform density inside the container.Undefined in terms of shape or volume, gas is a sort of stuff. One element, like hydrogen gas (H2), a compound, like carbon dioxide (CO2), or a combination of multiple gases, like air, can make up a gas.Learn more about Gas refer to :
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You're working in a lab at Clemson university, and your professor wants to make one of the existing polymers stronger and more rigid. He says, "Pop quiz, lab rats. What do we need to do to this polymer to strengthen it?" Explain two simple ways synthetic polymers can be made stronger and more rigid?
Cross-linking polymers not only increases the tensile strength of the polymer, but it also changes the polymer's elastic properties.
What are polymers ?The term polymer is defined as any of a class of natural or synthetic material composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers.
Adding cross-links between polymer chains initially makes the polymer more elastic. The introduction of short chains of sulfur atoms that link the polymer chains in natural rubber, for example, results in the vulcanization of rubber. The polymer becomes more rigid as the number of cross-links increases.
Thus, Cross-linking polymers not only increases the tensile strength of the polymer, but it also changes the polymer's elastic properties.
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identify the type of nuclear reaction that occurs when an alpha or a beta particle is spontaneously emitted by a radioactive isotope
During alpha decay, the atomic number of the radioactive isotope reduces by 2 unit and mass number decreases by four units. In beta decay, the mass number remains unchanged and the atomic number increases by one.
What is radioactive decay?Heavy unstable radioactive isotopes undergoes nuclear decay through the emission of charged particles such as alpha or beta. In alpha decay, the radioactive isotope emits an alpha particle or helium nuclei.
consider the general equation for alpha decay:
[tex]\rm _{Z}^{A}X \rightarrow _{Z-2}^{A-4}X + _{2}^{4}He[/tex]
Hence, the mass number of the product reduces by 4 units and atomic number by 2 units.
In beta decay, one or more beta particles or an electron is emitted results in increase in atomic number by one unit and mass remains constant.
The general nuclear reaction of beta decay is written as follows:
[tex]\rm _{Z}^{A}X \rightarrow _{Z +1}^{A}X + _{-1}^{0}e[/tex]
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sodium-25 was to be used in an experiment, but it took 3 minutes to get the sodium from the reactor to the laboratory. if 9.22 mg of na-25 were removed from the reactor, how many mg of na-25 were placed in the reaction vessel 3 min later if the half-life of na-25 is 60 seconds?
If the na-25's half-life is 60 seconds, 0.625 mg was added to the mixture vessel 3 minutes later.
In what metal are reactors constructed?A reactor can be fueled with a variety of materials, although uranium is the most often utilized fuel. Oceans contain uranium, which is widely distributed throughout the earth and is also rather abundant. You can also use other fuels, such thorium and plutonium. Uranium is used as nuclear fuel in reactors. The uranium is transformed into tiny ceramic pellets and piled into fuel rods, which are enclosed metal tubes. To create a fuel assembly, typically upwards of 200 of all these rod are bundled together.
(5)(½^(3/1)) = .625 mg
3 half lives later 5/2 = 2.5mg,
Consequently, 2.5/2 = 1.25 mg, and 1.25/2 = 0.625 mg remain.
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if 9.22 mg of na-25 were removed from the reactor 0.625 mg of na-25 were placed in the reaction vessel 3 min later if the half-life of na-25 is 60 seconds.
In what metal are reactors constructed?A reactor can be fueled with a variety of materials, although uranium is the most often utilized fuel. Oceans contain uranium, which is widely distributed throughout the earth and is also rather abundant. You can also use other fuels, such thorium and plutonium. Uranium is used as nuclear fuel in reactors. The uranium is transformed into tiny ceramic pellets and piled into fuel rods, which are enclosed metal tubes. To create a fuel assembly, typically upwards of 200 of all these rod are bundled together.
Given that,
the half-life of na-25 is 60 seconds
9.22 mg of na-25 were removed from the reactor
now,
(5)(½^(3/1)) = 0.625 mg
3 half lives later 5/2 = 2.5mg,
Consequently, 2.5/2 = 1.25 mg, and 1.25/2 = 0.625 mg remain.
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Describe the key features of the Sun.
The Sun is composed of about 75% hydrogen, 25% helium, and trace amounts of heavier elements.
What are the key features of the Sun?Our Sun is a star and it is the near star to planet Earth. The Sun is also the largest thing in our solar system and it contains most of the mass in the whole solar system. Because the Sun has the greatest mass it also has a substantial force of gravity in the solar system.
Without the Sun's heat and light, the Earth would be a lifeless ball of ice-cover rock. The Sun warms our seas, stirs our atmosphere, causes our weather patterns,
So we can conclude that At its core, the Sun's temperature extends over 15 million K (27 million°F) and its pressure is over 200 billion times the pressure at Earth's surface.
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what is a solute?group of answer choicesa homogeneously dispersed mixturea substance that dissolves into another substancea substance, usually a liquid, which dissolves other substancesa mixture of two or more substancesa heterogeneously dispersed mixture
A mixture in which one substance dissolves in the other is called a solution. The solute seems to be the material that absorbs.
What is solution and example?A homogenous mixture of two or more substances with particles smaller than 1 nm is referred to as a solution. Solutions are available in various forms, such fizzy water, sugar and salt solutions, and others. Every element in a solution appears to be a single phase.
Which is a characteristic of a solution?Solutions are homogenous mixes made up of at least two solutes and one solvent. The material that dissolve is regarded as the solute. The dissolved medium is the solvent.
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find the relative molecular mass of lead trioxonitrate(v)
(pb=108,N=14,O=16)
Answer:
The molecular mass of lead trioxonitrate(V) is 232
Explanation:
The molecular mass of Lead Trioxonitrate(V),which is Pb(NO3)2 is:
= 108 + (14 + 3*16)*2
= 108 + 62*2
= 108 + 124
= 232
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In which of the following atoms is the 3s orbital closest to the nucleus?
a. Br
b. Cl
c. At
d. I
e. The 3s orbitals are the same distance from the nucleus in all of these atoms.
The number of protons increases down the group as nuclear charge increases. The element with more electrons has a higher nuclear charge, and thus the nucleus holds electrons more tightly. As a result, At will have a 3s orbital that is closest to the nucleus.
What is nucleus of atoms?The 1909 Geiger-Marsden gold foil experiment served as the foundation for Ernest Rutherford's 1911 discovery of the atomic nucleus, a tiny, dense region of protons and neutrons at the center of an atom. The quantity of protons decreases with increasing nuclear charge. The nucleus holds electrons more tightly in the element with the most electrons because it has a higher nuclear charge. The positively charged protons and electrically neutral neutrons that make up the nucleus. Protons and neutrons are both composed of quarks.
Here,
As nuclear charge increases, the number of protons decreases. Because the element with the most electrons has a higher nuclear charge, the nucleus holds electrons more tightly. As a result, At will have the closest 3s orbital to the nucleus.
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calculate the volume of concentrated sulfuric acid needed to 5.00 l of 10.0 m sulfuric acid. concentrated sulfuric acid has a molarity of 18.0 m and a density of 1.83 g/cm3 .
This yields a mass of 16.47 g of concentrated sulfuric acid.
What is sulfuric acid?Sulfuric acid, also known as oil of vitriol, is a strong mineral acid with the molecular formula H2SO4.
Volume of concentrated sulfuric acid needed = 5.00 L x (18.0 m / 10.0 m)
= 9.00 L
Mass of concentrated sulfuric acid needed = 9.00 L x 1.83 g/cm3
= 16.47 g
The volume of concentrated sulfuric acid needed to make 5.00 L of 10.0 m sulfuric acid can be calculated by multiplying the volume of the solution (5.00 L) by the molarity of the concentrated sulfuric acid (18.0 m) divided by the desired molarity of the solution (10.0 m). This yields a volume of 9.00 L of concentrated sulfuric acid. The mass of concentrated sulfuric acid needed can then be calculated by multiplying the volume of concentrated sulfuric acid (9.00 L) by the density of sulfuric acid (1.83 g/cm3). This yields a mass of 16.47 g of concentrated sulfuric acid.
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The enthalpy of vaporization of water is 40.7 kJ/mol. Which of the following best explains why the enthalpy of vaporization of methane is less than that of water
The difference in enthalpy of vaporisation between methane and water can be best explained by the fact that methane doesn't really exhibit formation of hydrogen bonds while water does.
Where can you find methane?
Major natural sources for methane include termite digestion, emissions through wetlands & oceans, and ocean currents. Rice production, garbage, raising of cattle as well as other ruminant animals (calf burps! ), and energy production are examples of sources associated with human activity.
What is the purpose of methane?
Unscented, colourless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in wastes, marshes, septic tanks, and sewers and can be produced as natural materials decompose.
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According to the particle theory of matter, there is space between the small particles that make up matter. The space between particles differs depending on the state of the matter. Which list ranks the states of matter, according to the spacing between particles, from largest to smallest
Answer:
gas, liquid, solid
Perform two titrations, the first using methyl orange as an indicator and the second using phenolphthalein as an indicator. record the volume required to reach a color change with each indicator: volume naoh (methyl orange): 2.0 ml volume naoh (phenolphthalein): 24.3 ml why did you get such different results with each indicator
Indicators are substances whose solutions change colour when the pH fluctuates. These are what are known as acid-base markers.
In a straightforward explanation, what is titration?A titration is a method for figuring out the concentration of the unknown by using a solution with known concentration. Until the reaction is finished, the titrant (the known solution) is typically supplied from a micropipette to a known volume of the sample (the unknown solution).
Due to differences in their emission spectra, chemical conjugate bases or acids of these relatively weak anion show a range of colours.
The pH indicator's colour is altered by the H+ ion's disintegration from the indication itself. Take note that pH indicators can also include mild acids and natural colours. The strong acidic biomarker dissociates, which causes the solution to take on a different colour.
Methyl orange and phenolphthalein are employed as markers. Methyl orange turns acidic solutions red, whereas basic solutions turn it yellow. In an acidic solution, phenolphthalein is colourless, but in a basic solution, it becomes pink.
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Assuming that the Aufbau Principle is followed, what is the expected electronic configuration of the element with atomic number Z = 116?
The expected electronic configuration of the element with atomic number Z = 116 is [Rn] 5f14 6d10 7s2 7p4. This is based on the Aufbau Principle, which states that electrons occupy the lowest energy orbitals available, starting with the lowest energy orbital.
The element with atomic number Z = 116 is Ununhexium (Uuh). Its electronic configuration follows the general pattern of the periodic table, with the outermost shell being the 7th shell. This is because the element is placed in the 6th period of the periodic table. The electronic configuration is the same as that of Radon (Rn), with the addition of two electrons to the 7s orbital.
The expected electronic configuration of Uuh is [Rn] 5f14 6d10 7s2 7p4, which is the same as that of Radon with the addition of two electrons to the 7s orbital. The 7s orbital has the highest energy level among the s orbitals and the 7p orbitals. Thus, the two electrons will be added to the 7s orbital to maximize stability.
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Which of the following is not an important factor in adjusting the amount of oxygen delivered to tissues?
A) Bohr effect
B) BPG
C) carbonic anhydrase
D) Haldane effect
The Haldane effect is not an important factor in adjusting the amount of oxygen delivered to tissues.
The Haldane effect is the phenomenon that the oxygen dissociation curve of hemoglobin shifts to the right in the presence of increased levels of carbon dioxide (CO2) and decreased levels of pH. The Haldane effect refers to the effect of CO2 on the oxygen-hemoglobin dissociation curve, it does not refer to the regulation of oxygen delivery to tissues directly.
The other options are important factors in adjusting the amount of oxygen delivered to tissues:
A) The Bohr effect is the phenomenon that the oxygen dissociation curve of hemoglobin shifts to the right in the presence of increased levels of carbon dioxide (CO2) and decreased levels of pH. This effect allows hemoglobin to release more oxygen in the tissues, where the levels of CO2 and acidity are higher.
B) BPG (bisphosphoglycerate) is a molecule that binds to hemoglobin, shifting the oxygen dissociation curve to the left, allowing more oxygen to be released in the tissues where the oxygen tension is low.
C) Carbonic anhydrase is an enzyme that catalyzes the reversible reaction between CO2 and H2O to form H2CO3 and H+. Carbonic anhydrase plays a role in regulating the pH of the blood and thus affects the oxygen-carrying capacity of hemoglobin.
It's worth noting that, these factors work together to adjust the amount of oxygen delivered to tissues, depending on the metabolic needs of the body.
two collinding paritcles have enough kinetic energy to form products. however, the collision results in the reactant particles staying in tact. what could be the reason
The particles may not have had enough kinetic energy to overcome the activation energy barrier that is required to form the products.
What is kinetic energy?Kinetic energy is the energy associated with the motion of an object. It is defined as the work done in order to accelerate a body of a given mass from rest to its stated velocity. Kinetic energy is directly proportional to the mass of the object and to the square of its velocity. It is an scalar quantity, having only magnitude and no direction.
This barrier is the amount of energy required to form bonds between the reactant particles, and if the particles do not have enough energy to reach this barrier, the reactants can stay in tact.
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A carbocation is all of the following, except O a positively charged species. O a reactive intermediate. O an electrophile. O a nucleophile.
participates in a chemical reaction by accepting an electron pair in order to bond to a nucleophile.
What are nucleophile and example?A nucleophile is a reactant which gives an electron pair to form a covalent bond. A nucleophile is usually charged negatively or is neutral with a lone couple of donatable electrons. H2O, -OMe or -OtBu are some examples. Overall, the electron-rich species is a nucleophile.
What is electrophile and nucleophile?Electrophiles are electron deficient species and can accept an electron pair from electron rich species. Examples include carbocations and carbonyl compounds. A nucleophile is electron rich species and donates electron pairs to electron deficient species. Examples include carbanions, water , ammonia, cyanide ion etc.
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add electron dots and charges as necessary to show the reaction of potassium and bromine
Potassium releases one electron, which the element bromine accepts. Potassium becomes a cation with a positive charge during this process, while bromine will become an anion with a negative charge.
Potassium: What is it?The mineral potassium is a required element for all bodily tissues. It is commonly referred to as electrolyte since this carries just little charged particles that causes a range of neuron of neuron functions. Available both as a nutraceuticals and naturally occurring in several foods, potassium is accessible.
How is potassium used by the body?Potassium can be found in many foods naturally and as dietary supplements. Its major goal is to aid the normal maintenance of lymphatic drainage in our cells. Sodium, on the other hand, maintains proper fluid levels within cells.
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predict whether each of the following molecules is polar or nonpolar if, cs2, so3, pcl3, sf6, if5.
CS[tex]_{2}[/tex] is Non - polar and SO[tex]_{3}[/tex] is Non - polar and PCl[tex]_{3}[/tex] is polar and SF[tex]_{6}[/tex] is Non - polar and IF[tex]_{5}[/tex] is Polar.
Polar compounds contain both positive and negative charge areas. Among polar substances, water can be used as an example. Its form and type of bonds result in a slight positive charge at one end (the hydrogen end) and a slight negative charge at the other end (the oxygen end). Molecules that have a spherically symmetric charge distribution over time are said to be nonpolar; however, since charges fluctuate, a molecule with such a distribution will always have a momentary dipole moment. There are fewer charges at the opposing ends of non-polar molecules than polar molecules. Hydrocarbon liquids are an example. So, CS[tex]_{2}[/tex] is Non - polar and SO[tex]_{3}[/tex] is Non - polar and PCl[tex]_{3}[/tex] is polar and SF[tex]_{6}[/tex] is Non - polar and IF[tex]_{5}[/tex] is Polar.
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Which of the following buffer systems would be the best choice to create a buffer with pH = 7.3?
Part A
Answer:HClO/KClO
For the best system, calculate the ratio of the masses of the buffer components required to make the buffer.
Potassium hydroxide and hypochlorous acid will combine to form hypochlorite ions. Along with the additional strong base, part of weak acid would be consumed during the process. A mole of KOH will consume a mole of HClO and create a mole of ClO, based on the balanced chemical equation.
Why is HClO such an effective acid?The acid having the more electronegative element, in this case HClO, is stronger when there are acids with components of equal oxidized form, such as HClO & HIO.
HOCl or HCl, which has a higher acidity?Because Cl has a higher electronegative polarity than Br, HOCl is a stronger acid that HOBr. Due to Br's bigger size than Cl's, binary acids like HBr and HCl have H-Br bonds that are longer than H-Cl bonds. In turn, HBr is a stronger acid that HCl because the H-Br bond is weaker than the H-Cl bond.
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What is the quantity of heat (in kJ) associated with cooling 185. 5 g of water from 25. 60°C to ice at -10. 70°C?
Heat Capacity of Solid = 2. 092 J/g°C
Heat Capacity of Liquid = 4. 184 J/g°C
T Fusion = 0. 00 ° C
ΔH Fusion = 6. 01 kJ/mol
Taking into account the definition of calorimetry, sensible heat and latent heat, the quantity of heat associated with cooling 185. 5 g of water from 25. 60°C to ice at -10. 70°C is 37.88 kJ.
You should be aware that water freezes at 0 degrees Celsius. In other words, water freezes and turns into ice at 0°C.
To provide heat without changing state, you must drop the temperature from 25.60°C (in the liquid state) to 0°C (sensible heat).
A body's capacity to absorb or emit heat is determined by:
Q = c× m× ΔT
where T is the temperature variation and Q is the heat exchanged by a mass m body made up of a certain heat material c.
Q = c× m× ΔT
Q1= 4.184 × 185.5 g× (- 25.6 °C)
Q1= -19,868.98 J
The amount of heat required to cause a mass m of a certain substance to change phase is equal to
Q = m×L
where L, or the substance's latent heat, varies depending on the sort of phase shift.
Q = m×L
Q2= 10.30 moles×6.01 kJ/mol
Q2=61.903 kJ= 61,903 J
0 °C to -10.70 °C
Similar to sensible heat previously calculated, you know:
Q = c× m× ΔT
c = Heat Capacity of Solid = 2.092
m= 185.5 g
ΔT= Tfinal - Tinitial= -10.70 °C - 0 °C= -10.70 °C
Replacing:
Q = c× m× ΔT
Q3= 2.092 × 185.5 g× (-10.70) °C
Q3= -4,152.3062 J
The following formula is used to get the total amount of heat needed:
Total amount of heat needed = Q1 + Q2 + Q3
Total energy needed is equal to -19,868.98 J + 61,903 J – 4,152.3062 J.
Total heat required= 37,881.7138 J= 37.8817138 kJ= 37.88 kJ
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7. The formation of the silvery lining is an example of which of the following indicators of chemical change?
(a) evolution of a gas
(b) distinct color change
(c) precipitate formation
(d) temperature change
Answer:
Explanation:
The formation of the silvery lining is an example of a distinct color change (b). A distinct color change is an indicator of a chemical change because it indicates a change in the composition of the material, which is caused by a chemical reaction.
The following equations describe the corrosion of iron to iron hydroxides in moist conditions. What substances in the equations are being oxidized
The formula for the oxidization of the iron hydroxide referring to is probably:
4 Fe + 3 O₂ + 6 H₂O -> 4 Fe(OH)₃
The oxidized substance is iron.
In this equation iron (Fe) is oxidized by oxygen (O2) in the presence of water (H2O). Iron loses electrons during the reaction and becomes the corrosion product iron hydroxide (Fe(OH)3). Oxygen molecules acquire electrons and become hydroxide ions (OH-).
Generally, in a redox reaction, the substance that donates electrons is oxidized and the substance that accepts electrons is reduced. In this case, iron is oxidized and oxygen is reduced. Iron is an essential element for all living organisms and is non-toxic. The average human contains about 4 grams of iron. Most of it is in hemoglobin in the blood.
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wine goes bad soon after opening because the ethanol in it reacts with oxygen gas from the air to form water and acetic acid , the main ingredient of vinegar. what mass of ethanol is consumed by the reaction of of oxygen gas? be sure your answer has the correct number of significant digits.
The 5.3 g mass of ethanol is consumed by the reaction of oxygen gas.
What results from the ethanol in wine's reaction with oxygen when it is left out in the air?When a wine is exposed to air, a sequence of chemical processes takes place that transforms ethanol, or what we typically know as alcohol, into acetaldehyde.
What happens if oxygen is exposed to the wine?Oxidization leads to an oxidized wine
Minor oxygen exposure can result in richer, more nuanced flavors that improve the appeal and general quality of wines. However, overexposure has the opposite effect, muting scent, taste, and even color while destroying those nuanced qualities. The wine is deemed to have "oxidized" at this point.
Chemical reaction
CH3 CH2 OH + O2 ---> CH3COOH + H2O
It is balanced.
Molar ratios,
1 mol CH3 CH2OH : 1 mol O2 : 1 mol CH3COOH : 1 mol H2O
Conversion of 7.6 grams of ethanol to moles
Molar mass of CH3CH2OH = 2 * 12g/mol + 6 * 1 g/mol + 16 g/mol = 46 g/mol
moles = mass / molar mass = 7.6 g / 46g/mol = 0.165 mol
Use of proportions with the molar ratios:
1mol CH3CH2OH / 1mol O2 = 0.165 mol CH3CH2OH / x => x = 0.165 mol CH3CH2OH.
Conversion of 0.165 mol O2 to grams
mass in grams = number of moles * molar mass = 0.165 mol * (2 * 16g/mol)
mass = 5.28 g ≈ 5.3 g
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Distinguish between kinetic and potential energy in the following examples: two seperated magnets; an avalanche of snow; books on library shelves; a mountain stream; a stock car race; separation of charge in a battery.
That has been released and is associated with the body in motion.
define kinetic energy ?
In physics, an object's kinetic energy is the energy it has as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a certain velocity. The body retains its kinetic energy after gaining it during acceleration until its speed changes. The body does the same amount of work while slowing down from its current pace to rest. Formally, kinetic energy is any term in a system's Lagrangian that contains a time derivative.
The kinetic energy of a non-rotating object of mass m moving at a speed v in classical physics
The primary distinction between kinetic energy and potential energy is that potential energy is mechanical energy that is stored within an object and is ready to be released as and when needed to do work, whereas kinetic energy is mechanical energy that has been released and is associated with the body in motion.
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5. Two clear, colorless liquids are allowed to come to room temperature (22 °C). The timer is started and then the two solutions are mixed together to form another clear, colorless liquid. Looking at the graph to the right, at what time were the two solutions mixed together?
Based on the graph, it can be concluded the solutions were mixed together in minute 2.
How does the temperature change when two substances are mixed?In general, when two substances are mixed it is expected a chemical reaction occurs. This implies the atoms of the substances involve interact and they create new components known as the products. For example, oxygen + carbon = carbon dioxide.
Moreover, these reactions often lead to a change in the temperature; in most cases, temperature increases when the reaction is happening and then it stabilizes again. However, in some reactions temperature might decrease.
At what time were the two solutions mixed together?Based on the above, the solutions were mixed together during teh minute because after this minute we can see the temperature increases and this indicates the chemical reaction is happening.
Note: This question is incomplete; here is the missing graph:
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suppose that, at a particular moment during the reaction, molecular oxygen is reacting at the rate of 0.024 m/s. a) at what rate is n2o5 being form?
Answer:
At a particular moment during the reaction, with molecular oxygen reacting at the rate of 0.024 M/s, the rate of N2O5 being formed is 0.048 M/s. This is due to the stoichiometry of the reaction, which is 4NO2 (g) + O2 (g) → 2N2O5 (g). This means that for every mole of molecular oxygen reacting, two moles of N2O5 will be formed. Therefore, the rate of N2O5 being formed is double the rate of molecular oxygen being consumed (0.024 M/s x 2 = 0.048 M/s).
the isotope carbon-14 decays over time into nitrogen-14 with a half life of 5,730 years. suppose you find a fossil that contains 1.25 grams of carbon-14 and 3.75 grams of nitrogen 14. how much carbon-14 was present in the organism at the time of death?
At the time of death, the creature contained 5 g of carbon-14.
How can carbon-14 become radioactive?Although the nucleus of carbon-14 is unstable due to the two extra neutrons, the substance is still carbon because it has six protons. Carbon-14 transforms one of its neutrons into a proton by releasing a negatively charged particle from its nuclei in order to attain a more stable state.
In this case, N-14 is the daughter isotope and C-14 is the parent isotope.
in present time the fossil contain, amount of parent isotope is = 1.25 gm
amount of daughter isotope = 3.75 gm .
As we amount of C-14 is constant until the death of organism or body . After the death of plants or animals C-14 starts decay in to N-14 .
so at initial time or at the time of decay , the amount of C-14 was = 1.25 gm + 3.75 gm = 5 gm .
so answer is 5 gm.
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A solution contains 2.2 x 10^-4 M Ag+ and 1.3 x 10^-3 M Pb^2+.
If NaI is added, will AgI (Ksp = 8.3 x 10^-17) or PbI2 (Ksp = 7.9 x 10^-9) precipitate first?
Specify the concentration of I- needed to begin precipitation.
AgI will be the first to precipitate. [I-] = 4.2 x 10-13 M for AgI
[I-] = 2.3 x 10-3 M for PbI2.
What exactly do you mean by precipitate?: to fall or become suddenly ill. : to move or act in a violent or unwise manner. 3. to extricate from a suspension or solution.
Is precipitate synonymous with soluble?In chemistry, a precipitate is an insoluble solid that develops from a liquid solution. Precipitation is the process by which an insoluble solid emerges from solution. The precipitate is frequently released as a suspension. Precipitates are created when two soluble salts combine in a solution to produce one or more insoluble products.
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