To determine the number of grams of element "f" needed to react with 2.30 grams of element "k", you can use the mass ratio provided in the problem. First, let's call the mass of "f" that is needed x. The mass ratio tells us that the mass of "f" is 2.06 times the mass of "k", so we can set up the following equation:
2.06 * x = 2.30
To solve for x, we can divide both sides of the equation by 2.06:
x = 2.30 / 2.06
This simplifies to:
x = 1.12 grams
Therefore, 1.12 grams of element "f" are needed to react with 2.30 grams of element "k".
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Organisms typically have more than one form of each gene. If one form can mask the appearance of another form, that form is considered _______ the other form.
A.
better than
B.
dominant over
C.
recessive to
D.
worse than
If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.
What are dominant alleles?According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.
When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.
For the dominant allele, however, only one copy is needed for it to be expressed.
In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.
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which of the following statements is false regarding the equilibrium constant, kc?13)a)the numerical value of kc depends on the form of the balanced equation.b)kc for a reaction at a particular temperature always has the same value.c)when quoting kc it is customary to omit units.d)kc for the reverse reaction is the negative of kc for the forward reaction
Kc for the reverse reaction is the negative of Kc for the forward reaction is the false statement.
What is equilibrium constant?The equilibrium constant of any chemical reaction is the value of its own reactions quotient at chemicals equilibrium, a State approaches by a dynamically chemicals systems after sufficient times has elapsed at which is in its compositions has no measurable tendency towards furthermore change.
As we know,
Value of Kc for the reverse reaction is always in the from of reciprocal.
Let's take
A<----------------> B,Kc
For reversion reaction we have to take
B<------------------>A,1/Kc
In this equation all the statement are correct.
Thus Kc for the reverse reaction is the negative of Kc for the forward reaction is the correct answer.
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the enthalpy of sublimation for a particular compound at 25.0 c is 32.4 kj/mol. the enthalpy of fusion for this compound at its melting point is 10.4 kj/mol. calculate the enthalpy of vaporization for this compound.
The enthalpy of vaporization for this compound is 22.0 kJ/mol.
What is vaporization?Vaporization is a process in which a liquid or solid is transformed into a gaseous state. It occurs when molecules in the liquid or solid absorb enough energy to break their intermolecular bonds and become a gas. This process can be carried out either through the application of heat or pressure, or through a process known as sublimation, which occurs when a solid is exposed to a vacuum.
ΔHₙ = ΔHₓ - ΔHₐ
Where, ΔHₙ = Enthalpy of vaporization
ΔHₓ = Enthalpy of sublimation (32.4 kj/mol)
ΔHₐ = Enthalpy of fusion (10.4 kj/mol)
ΔHₙ = 32.4 - 10.4
ΔHₙ = 22.0 kJ/mol
The enthalpy of vaporization for this compound is the difference between the enthalpy of sublimation and the enthalpy of fusion. Therefore, the enthalpy of vaporization for this compound is 22.0 kJ/mol.
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if the reaction yields 21.1l of nitrogen gas what mass of nan3 in grams would be required to produce this volume at stp?
if the reaction yields 21.1l of nitrogen gas, 40.81g mass of nan3 in grams would be required to produce this volume at stp
mass of NaN3 (g) = moles of NaN3 (ma) x molar mass of Na N3 (g/mol) = 0-678 mol 65 g/mol =40.81g. A chemical compound's molar mass is described as the weight of a sample of that chemical divided by the quantity of substance in that sample, which is the quantity of moles in that sample, evaluated in moles. The molar mass of a substance is a mass property, not a molecular property. It is the connection between pressure, volume, moles, and temperature. is the volume that one mole of the a chemical substance or a chemical compound takes up. As a result, at STP, the molar volume of a gas is 22.4 litres.
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A kangaroo was 396 meters east of a lake. In 12 seconds, the kangaroo hopped one-third of the way to the lake at a constant velocity. What was the kangaroo's velocity?
The velocity of an object is the ratio of the distance to the time. The distance travelled by Kangaroo is 396 m in 12 seconds. So its velocity is 33 m/s.
What is velocity?Velocity is a physical quantity and it is the measure of distance travelled per unit time. Velocity is the rate of speed and it is a vector quantity.The velocity can be expressed in terms of m/s, Km/hr etc.
Mathematically, velocity is the ratio of distance to the time.
Given that, distance covered by kangaroo is 396 meters.
time taken = 12 s.
therefore, velocity can be calculated as follows:
velocity = distance/time
= 396 m / 12 s
= 33 m/s.
Therefore, the velocity of the kangaroo is 33 m/s.
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classify each of the following characteristics as related to fusion, fission, or both
Used in nuclear
power plants
Byproducts have
long half-lives
Needs very high
temperatures
Releases lots
of energy
Occurs on the sun
Fission only
Fusion only
Fission and fusion
Nuclear Fission include used in nuclear power plants and byproducts have long half-lives, Nuclear fusion includes occurs on the sun and needs very high temperatures, while Nuclear fission and Nuclear fusion includes release lots of energy.
What are Nuclear fission nuclear and Nuclear fusion?Nuclear fission is a physico chemical process caused when an atom divides into two smaller atoms, which released important amounts of energy and it is used to generate electricity in nuclear power plants.
Conversely, Nuclear fusion occurs when smaller atoms such as hydrogen fuse to form larger atoms, which is able to generate much more energy when compares to Nuclear fusion, and this process fuel energy in the sun.
Therefore, with this data, we can see that fission nuclear and fusion nuclear are very different processes in terms of the division of fusion of atoms and they release differential amounts of energy.
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Which of the following is NOT a correct formula unit for a salt made from main group elements?
Group of answer choices
KF
Na2S
Ca2O
Mg3N2
The formula unit of a salt that is not correct is [tex]Ca_{2} O[/tex] in option C.
What is a salt?A salt is almost always made up of a metal and a nonmetal element. The salts as we know them are mostly ionic in nature and they are known to be able to dissolve in solution when they are put into solution.
We know that the salt that they meant to show in option C is calcium oxide and the foregoing can not be the correct formula since both the calcium and the oxygen ions are divalent. The correct formula of the salt would be CaO.
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)the decomposition of dinitrogen pentoxide is described by the chemical equation2 n2o5(g) 4 no2(g) o2(g)if the rate of appearance of no2 is equal to 0.560 mol/min at a particular moment, what is the rateof appearance of o2 at that moment?2)a)0.280 mol/minb)1.12 mol/minc)2.24 mol/mind)0.140 mol/min
The rate of appearance of o2 at that moment is 2.80 mol/min.
Calculation :
Recall
aA+bB→ cC+dD
[tex]\frac{d[A]}{a.dt}[/tex] = [tex]\frac{d[B]}{b.dt}[/tex] = [tex]\frac{d[C]}{c.dt}[/tex] = [tex]\frac{d[D]}{d.dt}[/tex]
Then
[tex]\frac{d[NO_{2} ]}{2.dt}[/tex] = [tex]\frac{d[NO_{2} ]}{4.dt}[/tex]
Replacing :
[tex]\frac{1.4}{2}[/tex] = [tex]\frac{d[NO_{2} ]}{4.dt}[/tex] ....... [tex]\frac{d[NO_{2} ]}{dt}[/tex] = 2.8
Degradation is the first step in the recycling of nutrients that an organism (plant or animal) uses to build its body. This is the process by which dead tissue is broken down and transformed into simpler organic forms.They are the food source for many species that underlie ecosystems.
Decomposition or putrefaction is the process by which dead organic matter breaks down into simple organic or inorganic matter such as carbon dioxide, water, simple sugars and inorganic salts. This process is part of the nutrient cycle and is essential for recycling the finite substances that occupy the physical space of the biosphere. An organism's body begins to decompose shortly after death. Animals such as earthworms also help break down organic matter.
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What is the IUPAC name for the compound N₂O3?
Answer: Dinitrogen trioxide
Explanation:
the aerobic decomposition of biomass produces significant quantities of methane. question 15 options: true false
The statement given is "False" that The Aerobic decomposition of biomass produces significant quantities of Methane.
What is aerobic decomposition?
The decay or breaking down of organic material in the presence of free or dissolved oxygen (DO).
What does aerobic decomposition produce?
Compost, water (both liquid leachate and gaseous vapor), and volatilized gases are all products of aerobic composting (ammonia, carbon dioxide and, occasionally, gases perceived as odors). Digestate and biogas are created during anaerobic digestion.
Is aerobic decomposition faster than anaerobic?
You can get finished compost sooner if there is enough air available because aerobic decomposers function faster and more effectively than their anaerobic cousins.
The aerobic composting produces water vapor, carbon dioxide and a black organic material.To know more about aerobic decomposition:
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Which type of isomers are o-xylene, m-xylene, and p-xylene?
structural isomers
optical isomers
geometric isomers
o-xylene, m-xylene, and p-xylene are structural isomers.
o-xylene, m-xylene, and p-xylene are examples of aromatic isomers, also known as ortho-, meta-, and para-xylene, respectively. These isomers are classified as aromatic because they are part of a family of compounds known as aromatic hydrocarbons, which contain a ring of six carbon atoms bonded to each other in a specific way.
o-xylene, m-xylene, and p-xylene are also examples of structural isomers. Structural isomers are compounds that have the same molecular formula but differ in the arrangement of their atoms. In the case of o-xylene, m-xylene, and p-xylene, the atoms are arranged differently around the ring of six carbon atoms.
o-xylene, m-xylene, and p-xylene are not optical isomers, which are also known as enantiomers. Optical isomers are compounds that are mirror images of each other but are not superimposable. Optical isomers are important in medicinal chemistry because they can have different biological properties even though they have the same molecular formula and structure.
o-xylene, m-xylene, and p-xylene are also not geometric isomers. Geometric isomers are compounds that have the same molecular formula and the same arrangement of atoms, but differ in the orientation of their atoms or groups of atoms in space. Geometric isomers are often found in compounds with cis-trans double bonds or ring structures.
cluster decay is a type of radioactivity like alpha decay, except instead of spitting out a helium nucleus, it expels something bigger. what is the atom resulting from uranium-235 (u) emitting a magnesium-28 (mg) nucleus? (write your answer in the standard u-235 format.)
A radioactive atom emits a cluster of neutrons and protons-235 heavier than an alpha particle in a process known as cluster decay.
Cluster decay, also known as heavy particle radioactivity or heavy ion radioactivity, is a very uncommon form of nuclear decay in which an atomic nucleus generates a small "cluster" of neutrons and protons, more than in an alpha particle but less than a typical binary fission fragment. The cluster size is also produced by ternary fission into three fragments. When the parent nucleus loses protons, it becomes the daughter nucleus, which has an atomic number Zd = Z + Ze and a mass number Ad = A Ae, where Ae = Ne + Ze. [1] For instance
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What is the correct molecular formula for the compound magnesium chromate pentahydrate?
MgCrO4•5H2O is the answer
The correct molecular formula for the compound magnesium chromate pentahydrate is as follows: MgCrO₄•5H₂O.
What is molecular formula?Molecular formula in chemistry is a notation indicating the number of atoms of each element present in a compound.
Chemical or molecular formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
The chemical formula also reveals information about the types and number of atoms that make up a chemical compound or molecule.
For example; a chemical compound named magnesium chromate pentahydrate will have a chemical formula of MgCrO₄•5H₂O.
This tells us that the compound contains magnesium, chromium, oxygen, and hydrogen atoms.
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How specifically is kinetic energy lost during a car crash?
Answer + Explanation:
During a car crash, kinetic energy is lost through various forms of deformation of the vehicle and the generation of heat.
When a car collides with another object, the force of the impact causes the vehicle's body and structure to deform. This deformation absorbs some of the kinetic energy and converts it into other forms of energy, such as heat and sound.
In addition, friction between the moving parts of the car and between the car and the road can also generate heat, which absorbs some of the kinetic energy.
The amount of kinetic energy lost during a car crash depends on the mass of the vehicle, the speed at which it was traveling, and the type and severity of the collision. In general, higher speeds and more severe collisions result in greater kinetic energy loss.
what atomic or hybrid orbitals make up the sigma bond between and in acetic acid, ? ( is the second carbon in the structure as written. is the first oxygen in the structure as written.) orbital on orbital on what is the approximate bond angle? angle
(a) sp2- hybrid orbital of C1 and p-orbital of O1 , because, central atom i.e. carbon has sp2-hybridization and in surrounded oxygen atom last electrons enters in p-orbital. (b) 1200 bond angle, because shape is trigonal planar.
Atomic orbitals are generally specific through a mixture of numerals and letters that constitute precise residences of the electrons related to the orbitals—for example, 1s, 2p, 3d, 4f. The numerals, referred to as primary quantum numbers, imply strength degrees in addition to relative distance from the nucleus. The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively.
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rank the speed of sound in the following substances from slowest to fastest: steel 25°C air, 50°C air, and water. defend your predictions using the kinetic theory of matter.
The speed of sound in given substances from slowest to fastest: 25°C air, 50°C air, water, steel.
What are sound waves?Sound can transmit through liquids, gases, solids, and plasma as longitudinal waves, these are also known as compression waves. Sound waves need a medium to travel so they can be propagated through solids as longitudinal and transverse waves.
Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction, while transverse waves exhibit alternating shear stress perpendicular to the propagation path.
Waves can cause matter to move up and down but can not carry along with them. As the temperature of the air increases the molecules start to vibrate faster eventually the speed of the sound increase.
The speed of sound is lowest in gases, faster in water, and fastest in steel (solid).
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color of the solution in the control changed? 4) infer. when you began the experiment, was there co2 in the water? in the test tubes that contained elodea, where did the co2 go?
The water was, indeed, green. This signifies a low carbon dioxide level. Carbon dioxide was utilized in the photosynthesis activity in the tubes containing Elodea.
Carbon dioxide is a compound consisting of molecules that are covalently double bonded to two oxygen atoms. At ambient temperature, it appears to exist as just a gas. Carbon dioxide in the atmosphere is translucent to visible to the human eye but soaks up infrared light, acting as a greenhouse gas. Photosynthesis is the process that plants as well as other microbes use to convert chemical energy into light that can then be released to power the individual's activities via cellular respiration.
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identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 656 nm .
The initial and final states if an electron in hydrogen emits a photon with a wavelength of 656 nm is n = 3 to n = 2.
given that :
wavelength of the photon emitted λ = 656 nm = 656 × 10⁻⁹ m
the energy of the photon is given as :
E = hc / λ
= (6.626 × 10⁻³⁴ × 3 ×10⁸ ) / 656 × 10⁻⁹
= 3 × 10⁻¹⁹ J = 1.9 eV
En = - 13.6 / n² eV
where n = 1,2,3 ....
1) n = 2 to n = 1
E2 - E1 = - 13.6 eV ( 1 / 4 - 1/ 1)
= 10.2 eV
2) n = 3 to n = 2
E3 - E2 = -13.6 eV ( 1/3² - 1/ 2² )
= 1.9 eV
Thus the initial and the final states are n = 3 to n = 2.
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What mass of water is produced when 5.0 mol o2 is produced by this reaction?
Answer:
39.0
Explanation:
One of the wavelengths of light emitted by hydrogen atoms is 6.56 x 10–7 m. Calculate the frequency.
The frequency of the light emitted by hydrogen is equal to 4.57 Hz.
What are frequency and wavelength?The frequency of the wave can be defined as the number of oscillations of a wave per second. The frequency has S.I. units of s⁻¹ or Hertz.
The wavelength can be described as the distance between two adjacent crests on a wave.
The relation between frequency, wavelength, and speed of light (c) can be shown as:
c = νλ
Given, the wavelength of the light emitted by H-atom, ν = 6.56 × 10⁻⁷ m
The speed of light, [tex]c =3 \times 10^8\; m/s[/tex]
The frequency of the light emitted by hydrogen atoms can determine from the above-mentioned relationship:
ν= c/λ = 3 ×10⁸/6.56 × 10⁻⁷ = 4.57 Hz
Therefore, the frequency of the emitted light is equal to 4.57 Hz.
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how many moles of chloride ions are there in a mixture of 2mol of barium chloride and 1 mol of pottassium chloride
The chloride ions in a mixture of 2mol of barium chloride and 1 mol of potassium chloride are 3 moles
What is Barium chloride?Generally, Barium chloride is an inorganic compound with the formula BaCl2. It is a white solid that is highly soluble in water. It is commonly used as a test for detecting the presence of sulfates in a solution and as a precursor to other barium compounds. Barium chloride is toxic if ingested, so it should be handled with caution.
There are a total of 3 moles of chloride ions in the mixture of 2 moles of barium chloride and 1 mole of potassium chloride.
Barium chloride contains 2 moles of chloride ions, and potassium chloride contains 1 mole of chloride ions, for a total of 2 + 1 = 3 moles of chloride ions.
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please answer the following
Answer: Kinetic Energy
Explanation:
Gravitational potential energy of each drop converts to kinetic energy when water drops into a reservoir.
A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving bat this speed and in this direction? Explain.
Answer: 8N (8 kg/ms")
Explanation: F= M*A
F= (2KG)*(4/MS") = 8N
the provider has ordered an i.v. of 5% dextrose in lactated ringer's solution at 125 ml/hr. the i.v. tubing delivers 10 gtt/ml. how many gtt/min should fall into the drip chamber?
The amount of gtt/min that should fall into the drip chamber is given as follows:
20.8.
How to find the amount of gtt/min that should fall into the chamber?The amount of gtt/min that should fall into the chamber is found applying the proportions considering the amounts given in the problem.
The provider has ordered an i.v. of 5% dextrose in lactated ringer's solution at 125 ml/hr, and the i.v. tubing delivers 10 gtt/ml, hence the amount of gtt per hour is obtained as follows:
gtt/hr = 125 x 10 = 1250.
An hour is composed by 60 minutes, hence, applying this proportion, the amount of gtt/min that should fall into the drip chamber is calculated as follows:
gtt/min = 1250/60 = 20.8.
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which type of substance is fast acting, either immediately suffocating the victim or causing massive burning?
Substance is fast acting, either immediately suffocating the victim or causing massive burning is chemical weapons.
Chemicals used to intentionally kill or damage people through their poisonous qualities are known as chemical weapons. Chemical weapons also include weapons, apparatus, and other gear made expressly for turning hazardous substances into weapons.
What chemical weapon has the highest lethality?
What VX is VX is a nerve toxin that was created by humans for use in chemical warfare. The most dangerous and quickly acting of the known chemical warfare agents are nerve agents.
Basically, these weapons were just common munitions like grenades and artillery rounds that had well-known industrial chemicals added to them. Among the chemicals employed were chlorine, mustard gas, which causes terrible skin burns, and phosgene, a choking toxin.
The most critical effects are paralysis of the respiratory muscles and inhibition of the respiratory center. Ultimately, death results due to respiratory paralysis. If the concentration of the nerve agent is high, death is immediate.
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what is the difference between an ore vein and a disseminated deposit? which ones are easier to mine?
Ore veins and disseminated deposits are differ in terms of their size, shape, and distribution.
An ore vein is a large, continuous body of mineral deposits that are typically found in fractures or voids in rock formations. Ore veins are typically formed when minerals that are dissolved in water fill a void or crack in a rock formation. Ore veins are typically quite large and can be several meters in width and several kilometers in length. They are also typically found at depths of several hundred meters or more. Ore veins are generally easier to mine because they are more concentrated and can be more easily accessed through underground mining methods.
A disseminated deposit, on the other hand, is a type of mineral deposit that is dispersed or scattered throughout a larger rock formation. Disseminated deposits are usually smaller and less concentrated than ore veins and are typically found at shallower depths. They are often harder to mine because the minerals are not as concentrated and are more dispersed throughout the rock formation
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allylic bromination of methylenecyclohexane would be expected to give two isomeric monobromination products. identify the other isomer. multiple choice a b c d
Two isomeric monobromination products should result from the allylic bromination of methylene cyclohexane, according to expectations. The final product will be 1-(bromomethyl)cyclohexene.
N-Bromosuccinimide, also known as NBS, is a chemical reagent utilized mostly in organic chemistry's electrophilic addition, electrophilic substitution, and radical substitution processes. It is regarded as an easy way to get bromine radicals. NBS interacts with the substance in an aqueous solution in alkenes to produce bromohydrins as the end result.
Allylic bromination is defined as the reaction employing NBS that results in the substitution of a bromine atom for hydrogens on a carbon next to a double bond.
Following drawing of the methylene cyclohexane extended structure, the reaction will be carried out using the reagent NBS.
The IUPAC name of the product is 1-(bromomethyl)cyclohexene.
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a government agency recommends that the amount of arsenic in drinking water should not be above 0.01 ppm. at this concentration, how many grams of arsenic would you expect to find dissolved in 1000 ml of pure water?
The formula for PPM =100 /1,000,000=0.01 PPM = 100 / 1 , 000 , 000 = 0.01 . i.e concentrations of arsenic should be less than 0.01 *1000 therefore it should be less than 10 ml for 1000ml of water.
This stands for "parts per million" and can alternatively be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both signify the same thing. It provides information about a substance's density when it is dissolved in water. Examples include total alkalinity, calcium hardness, and free chlorine. A substance has a PPM of 1 if it makes up one millionth of the entire amount of water.
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Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.
N₂(g) + H₂(g) → NH3(g)
Hello,
I hope you and your family are staying safe and healthy!
To balance this chemical equation, we need to make sure that there is the same number of atoms of each element on both sides of the arrow.
We can start by looking at the nitrogen atoms. There is one nitrogen atom on the left side of the arrow, but there are two nitrogen atoms on the right side of the arrow. To balance the equation, we can add a coefficient of 2 in front of N₂ on the left side of the arrow:
2N₂(g) + H₂(g) → NH3(g)
Next, we can look at the hydrogen atoms. There are two hydrogen atoms on the left side of the arrow, but there is only one hydrogen atom on the right side of the arrow. To balance the equation, we can add a coefficient of 3 in front of NH3 on the right side of the arrow:
2N₂(g) + H₂(g) → 3NH3(g)
Now the equation is balanced, with two nitrogen atoms and two hydrogen atoms on each side of the arrow. The smallest possible whole number stoichiometric coefficients are 2 for N₂ and 3 for NH3.
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An apple costs $0.63. One tree produces 418 apples. The orchard has 20 trees. The apple farmer wants to trade the orange farmer 3 oranges for every 2 apples. How many oranges is he able to obtain by trading 0.64 of his orchard?
The apple farmer is able to obtain 8,034.6 oranges by trading 0.64 of his orchard.
How to determine how many oranges he is able to obtain by trading 0.64 of his orchard?
A word problem is a mathematical exercise where significant background information on the problem is presented in ordinary language rather than in mathematical notation
First, let's find the total number of apples produced by the orchard:
20 trees × 418 apples/tree = 8,360 apples
Now, let's find the number of apples that the apple farmer is able to trade: 8,360 apples × 0.64 = 5,350.4 apples
Since the apple farmer wants to trade 3 oranges for every 2 apples, he will be able to obtain:
3 oranges / 2 apples × 5,350.4 apples = 8,025.6 oranges.
Therefore, the apple farmer is able to obtain 8,025.6 oranges by trading 0.64 of his orchard.
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