Boyle stated that acids taste sour, are corrosive to metals, change the color of litmus to red, and become less acidic when mixed with bases. Acids are substances that release hydrogen ions when dissolved in water.
The sour taste of acids is due to the presence of hydrogen ions. When acids come in contact with metals, they corrode them by reacting with the metal to form metal salts and hydrogen gas. Litmus is a natural dye that is used to indicate the acidity or basicity of a substance. Acids turn litmus paper red, while bases turn it blue. When acids are mixed with bases, they neutralize each other, and the resulting solution becomes less acidic.
Boyle stated that acids taste sour, are corrosive to metals, change the color of litmus to red, and become less acidic when mixed with bases. Acids are compounds that release hydrogen ions (H+) when dissolved in water, and litmus is an indicator that changes color based on the acidity or basicity of a solution. Mixing an acid with a base results in a neutralization reaction, producing water and a salt, thereby reducing the acidic properties.
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The Atomic mass if hydrogen us 1.008 amu. The reason that this value is not a whole number is that
A. The Mass of hydrogen is the sum of the masses of the protons and electrons in the atom
B. Hydrogen has more than one isotope
C. Hydrogen only exists as a diatomic molecule
D. The Mass of a proton is not exactly equal to 1 amu
Answer:
I'm pretty sure its c
Explanation:
The atomic mass of hydrogen, which is 1.008 amu, is not a whole number because hydrogen has more than one isotope.
The atomic mass of an element is got from the sum of the proton and neutron in its atom. However, the atoms of some element exists in more than one isotope. Isotopes are atoms of the same element with same atomic number but different atomic masses. The different atomic masses arise from the difference in the number of neutrons of each isotope. Hydrogen has more than one isotope. The atomic mass of an element with more than one isotope is the weighted average of the mass numbers of the different isotopes of that element, hence, the resulting value cannot be a whole number.Learn more at: https://brainly.com/question/11680817?referrer=searchResults
What is the mass of 1.6x1020 molecules of carbon dioxide?
Answer:
\(1.2*10^{-2} g\)
Explanation:
\(1 mol - 6*10^{23} particles\)
\(1.6*10^{20}* \frac{1 mol}{6.02*10^{23}} = 0.00026578 mol\\\\M(CO2) = 12 + 2*32=44 \frac{g}{mol}\\\)
\(44\frac{g}{mol} *0.00026578 mol =0.012 = 1.2*10^{-2} g\)
The mass of 1.6x\(10^{20}\) molecules of carbon dioxide will be 1.2 × \(10^{-2}\) g.
What is mass?A physical body's mass would be its total amount of matter. Inertia, or even the body's resistance to acceleration whenever a net force will be applied, is also measured by this term.
Calculation of mass :
Given data:
Number of molecule of carbon -dioxide = 1.6x\(10^{20}\).
It is known that , 1 mol = 6 × \(10^{23}\) particle.
Since, 1.2 × \(10^{-2}\) g × 1 mol / 6 × \(10^{23}\) = 0.00026578 mol.
M(\(CO_{2}\)) = 12 +2 × 32 = 44 g/mol
Now, convert g/mol into gram.
44 g/mol × 0.000265 mol.= 0.012 = 1.2 × \(10^{-2}\) g.
Therefore, the mass of carbon dioxide will be 1.2 × \(10^{-2}\) g.
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Select the true statement. The four most prevalent elements in biosystems, in random order, are. H.O.S.C. The chiral amino acids found in biosystems are D-stereoisomers. Hydrogen bonds are weaker in non-polar solvents than they are in water. The strength of ionic bonds is inversely proportional to the dielectric constant of the solvent.
The correct statement is "Hydrogen bonds are weaker in non-polar solvents than they are in water."
The four most prevalent elements in biosystems, in random order, are C, H, O, and N. Amino acids are the building blocks of proteins, and the majority of the ones found in nature are L-stereoisomers, which means that they are left-handed. Ionic bonds are stronger in low dielectric constant solvents than in high dielectric constant solvents. They're also weaker in water because of its high dielectric constant. As a result, hydrogen bonding is stronger in water than in nonpolar solvents.
Therefore, the statement, "Hydrogen bonds are weaker in non-polar solvents than they are in water" is true.
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What do you call a substance that can only be separated into two or more simpler substances using chemical changes?
Answer:
Compounds are substances composed of two or more elements chemically combined that can be separated into simpler substances only by chemical means. Water, for example, is a compound because pure water is composed of only H2O molecules.
Pls choose me as brainliest!
in the bohr model of the hydrogen atom, an electron in the lowest energy state follows a circular path 5.29 x 10-11 m from the proton. (a) show that the speed of the electron is 2.19 x 106 m/s. (b) what is the effective current associated with this orbiting electron?
(a) By using the formula \(K = 0.5 * m * v2\) to determine an object's kinetic energy, we can determine the electron's speed in the hydrogen atom's lowest energy state. This results in an effective current of \(3.52 x 10-13 A\) for this orbiting electron.
An electron's rate of motion through space is referred to as its speed. It is used to determine how fast something is moving and is normally stated in metres per second (m/s). A multitude of variables, including an electron's energy, mass, and exposure to electric and magnetic fields, can have a significant impact on how fast an electron moves. Electrons can move at rates that range from less than a metre per second to almost the speed of light in the setting of atomic and molecular physics. When free electrons are present in a substance, such as a metal, they can occasionally flow through it at extremely fast speeds, which increases the material's electrical conductivity.
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Is Beryllium nitride an ionic or covalent compound
if a sample of carvone gives a specific rotation of 0 and the specific rotation of pure (r)-carvone is −61, what is the configuration of the unknown sample?
If a sample of carvone gives a specific rotation of 0 ° and the specific rotation of pure R- carvone is -61 ° , the enantiomer is the unknown sample, the correct option is C. racemic mixture.
The carvone gives a specific rotation = 0 °
The specific rotation of pure R- carvone = -61 °
The racemic mixture is formed when an equal amount of mixture of the R enantiomer and the S enantiomer of the carvone is formed. In racemic mixture, the R enantiomer rotates the plane polarized light in the one direction and the S enantiomer rotates the plane polarized light in the another direction.
It will cancels out the rotation . The each enantiomer equal in magnitude but opposite in the direction and have specific rotation of 0 ° for the racemic mixture.
This question is incomplete, the complete question is :
If a sample of carvone gives a specific rotation of 0 and the specific rotation of pure R- carvone is -61, which enantiomer is the unknown sample?
A. R
B. S
C. Racemic
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How many molecules are contained in 3 moles of water molecules , h2o?
Answer:
Explanation:
By definition 3 moles of water molecules. Or about 3 * 6.022140E23 water molecules = 1.806642E24 water molecules.
hope this is right..
Answer: Simply multiply Avogadro's number(6.02x10^23) by 3 and that's your answer. Use a scientific calculator
Explanation:
A buffer solution is formed by mixing equal volumes of 0.12MNH3(aq) and 0.10MHCl(aq), which reduces the concentration of both solutions by one half. Based on the pKa data given in the table, which of the following gives the pH of the buffer solution?
A
pH=−log(0.050)=1.30
B
pH=9.25+log(0.010/0.050)=8.55
C
pH=9.25+log(0.060/0.050)=9.32
D
pH=14.00−(−log(0.010))=12.00
Answer:
The correct answer is B.
The Henderson-Hasselbalch equation can be used to calculate the pH of a buffer solution:
pH = pKa + log([base]/[acid])
In this case, the pKa of ammonia is 9.25, the concentration of the base is 0.010 M, and the concentration of the acid is 0.050 M. Therefore, the pH of the buffer solution is:
pH = 9.25 + log(0.010/0.050) = 8.55
Explanation:
What geographic obstacle causes water to condense in an air mass as the air mass moves? Explain your answer.
A. Forests
B.oceans
C.prairies
D.mountains
Answer:
Mountains
Explanation:
Mountains are colder than the lower elevations. When humid air enters a cooler region, the saturated air begins to cool and this reduces the ability of the air to maintain the evaporated water is the gas state. Molecules of water have reduced enerfy at the cooler temperatures. They will slow down and coalesce with other water molecules to form small droplets of water. The atmoshere cannot hold these heaevier droplets and they begin to fall (i.e., rain).
One migh ask why does the air temperature drop at higher altitudes? Heat rises, so why shouldn't it be warmer on top a mountain, compared to the valley. The reason is that the atmosphere becomes less dense the further from Earth's center on gets. This less dense air has a lower water saturation point, so it rains.
Rank the layers of the atmosphere based on the energy of the photons that are typically emitted there, from highest to lowest.
The layers of the atmosphere can be ranked based on the energy of the photons that are typically emitted there, from highest to lowest as Thermosphere,Mesosphere,Stratosphere and Troposphere respectively.
Based on the energy of the photons typically emitted, the layers of the atmosphere can be ranked as follows:
1. Thermosphere: This layer has the highest energy of photons as it is the region where the sun's radiation is absorbed and ionizes the gas particles. This ionization process releases high-energy photons, including ultraviolet and X-rays.
2. Mesosphere: This layer has a lower energy of photons than the thermosphere. It is the region where meteoroids burn up upon entering the Earth's atmosphere, releasing photons in the form of light.
3. Stratosphere: This layer has a lower energy of photons than the mesosphere. It is the region where ozone is present, which absorbs high-energy ultraviolet radiation from the sun and emits lower energy photons in the form of heat.
4. Troposphere: This layer has the lowest energy of photons as it is the region closest to the Earth's surface and is primarily heated by convection from the ground. The photons emitted here are primarily in the form of infrared radiation.
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If you help ill give brainlest i need this done almost asap please
If an atom is highly reactive, a metal, and has one valence electron, what group/family does it belong to? (Name and number)
Answer:The answer is group 1 and alkali metals
Explanation:The elements in group one are alkali metals and have 1 valance electron
1. What is the solubility of Cr(OH)₃ at a pH of 9.80? (Ksp Cr(OH)₃ is 6.70 × 10⁻³¹)
2. What is the pH of a 0.660 M solution of C₅H₅NHBr (Kb of C₅H₅N is 1.7 × 10⁻⁹)?
3. The pOH of a basic solution is 5.45. What is [OH⁻]?
4. The pOH of an acidic solution is 9.69. What is [OH⁻]?
1. The solubility of Cr(OH)₃ at a pH of 9.80 is 1.28 × 10⁻¹⁰ M.
2. The pH of a 0.660 M solution of C₅H₅NHBr is 10.18.
3. The [OH⁻] of a basic solution with a pOH of 5.45 is 3.16 × 10⁻⁶ M.
4. The [OH⁻] of an acidic solution with a pOH of 9.69 is 1.58 × 10⁻⁵ M.
1.
The solubility of a compound is the maximum concentration of the compound that can be dissolved in a solution. The solubility of Cr(OH)₃ can be calculated using the following equation:
S = √Ksp
where:
S is the solubility of Cr(OH)₃ in moles per liter
Ksp is the solubility product constant for Cr(OH)₃
In this case, the Ksp for Cr(OH)₃ is 6.70 × 10⁻³¹. So, the solubility of Cr(OH)₃ is:
S = √6.70 × 10⁻³¹ = 1.28 × 10⁻¹⁰ M
2.
The pH of a solution can be calculated using the following equation:
pH = -log[H+]
where:
pH is the pH of the solution
[H+] is the concentration of hydrogen ions in moles per liter
The Kb of C₅H₅N is 1.7 × 10⁻⁹. So, the concentration of hydroxide ions in the solution can be calculated using the following equation:
[OH⁻] = √Kb * [C₅H₅NHBr]
In this case, the Kb for C₅H₅N is 1.7 × 10⁻⁹ and the concentration of C₅H₅NHBr is 0.660 M. So, the concentration of hydroxide ions is
[OH⁻] = √1.7 × 10⁻⁹ * 0.660 M = 3.16 × 10⁻⁶ M
The pOH of a solution can be calculated using the following equation:
pOH = -log[OH⁻]
In this case, the concentration of hydroxide ions is 3.16 × 10⁻⁶ M. So, the pOH of the solution is:
pOH = -log(3.16 × 10⁻⁶) = 5.45
The pH of the solution can be calculated using the following equation:
pH + pOH = 14
So, the pH of the solution is:
pH = 14 - 5.45 = 8.55
3.
The pOH of a solution is the negative logarithm of the concentration of hydroxide ions in moles per liter. So, the concentration of hydroxide ions in a basic solution with a pOH of 5.45 is 10⁻⁵.45 M, or 3.16 × 10⁻⁶ M.
4.
The pOH of a solution is the negative logarithm of the concentration of hydroxide ions in moles per liter. So, the concentration of hydroxide ions in a acidic solution with a pOH of 9.69 is 10⁻⁹.69 M, or 1.58 × 10⁻⁵ M.
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Which option will increase the rate of reaction?
A) removal of one of the reactants
B) decrease the volume of container
C) lower the temperature of reaction
D) reduce the pressure in the container
Answer:
B
Explanation:
when you increase the pressure of a closed container , its volume decreased.
in general when pressure is increased, rate of reaction is increased.
Weathering of rocks on Earth's surface leads to the formation of ___________ rock.
A. tectonic
B. metamorphic
C. sedimentary
D. igneous
Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?
Krypton is a halogen, so it is a secret element because it is always part of a compound and is difficult to find by itself.
Krypton is a halogen, so it should be kept secret because it is so reactive and toxic.
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
Krypton is a noble gas, so it secretly bonds with every type of element without showing it
Answer:
C) Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
Explanation:
Answer:
C
Explanation:
The Law of Superposition allows us to determine:
a
which rock layers are the oldest
b
the relative age of layers of rocks and the fossils in them
c
the exact or absolute age of rock layers
d
a and b are correct
Answer:
d . a and b are correct
Explanation:
The law of superposition allows us to determine the age of rock layers and also that of the fossils within them.
The law of superposition states that "in an undeformed sequence of strata, the oldest rock layer is at the bottom and the youngest is on top".
Using this law, geochronologists can determine the relative ages of rock layers. The youngest layer will be found on top. The oldest at the bottom of the sequence. The arrangement of the layers and the fossils there in can also tell us about the ages of the fossils themselves.PLEASE HELP CHEMISTRY QUESTION
When two solutions are mixed in a beaker, a reaction occurs, and the temperature drop is the reaction of……..
A) exothermic and -ve enthalpy
B) endothermic and -ve enthalpy
C) exothermic and +ve enthalpy
D) endothermic and +ve enthalpy
Answer:
B
Explanation:
the reaction is endothermic because of the temperature drop and the enthralpy is negative because its an endothermic reaction.
I did some research so I believe this to be correct but if its no I'm sorry
In a tank, 27 L He at 25ºC and 101.3 kPa and 12 L O2 at 25ºC and 101.3 kPa are pumped into a tank with a volume of 8.0 L. Calculate the partial pressure of each gas and the total pressure in the tank at 25ºC.
Total pressure = 4.9 atm
Partial pressure of neon = 3.4 atm
Partial pressure of oxygen = 1.5 atm
What are the mole fractions?We know that the partial pressure could be obtained as the product of the mole fraction and the total pressure thus we have to obtain the total pressure by the use of the partial pressures.
For the number of moles of helium;
P = 101.3 kPa or 0.99 atm
T = 25ºC or 298 K
V = 27 L
n = PV/RT = 0.99 atm * 27 L/0.082 * 298 K = 26.73/24.44 = 1.1 moles
Number of moles of oxygen
P = 101.3 kPa or 0.99 atm
T = 25ºC or 298 K
V = 12 L
n = PV/RT = 0.99 atm * 12 L/0.082 * 298 K =11.88 /24.44 = 0.5 moles
Total number of moles = 1.1 moles + 0.5 moles = 1.6 moles
Total pressure is obtained from;
nRT/V
= 1.6 moles * 0.082 * 298/8
= 4.9 atm
Partial pressure of neon = 1.1 moles/1.6 moles * 4.9 atm = 3.4 atm
Partial pressure of oxygen = 0.5 moles/1.6 moles * 4.9 atm = 1.5 atm
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True or false
Each family represents the number of energy levels present in an atom of the element.
Answer:
true because of the elements
In period 2, ionization energy decreases as you move from Be to B, then again from N to O. The same thing happens in period three and again in period 4. How can you account for these discrepancies
The discrepancies in ionization energy within periods 2, 3, and 4 can be accounted for by considering the electron configuration and the concept of effective nuclear charge.
It depends on factors such as the nuclear charge (proton number) and the shielding effect of inner electrons.
In period 2 (from Be to O), the general trend is that ionization energy increases as you move across the period from left to right. However, there are exceptions at B and O, where the ionization energy is lower than expected.
The discrepancies can be explained by the electron configuration and the concept of effective nuclear charge. At B, there is a half-filled p orbital (2p1), which provides additional stability and makes it easier to remove an electron, resulting in a lower ionization energy compared to Be. Similarly, at O, there is a full p orbital (2p4), which again adds stability and lowers the ionization energy compared to N.
In period 3 and 4, similar trends can be observed. The discrepancies in ionization energy can be attributed to electron configurations that result in increased stability and easier removal of electrons.
The discrepancies in ionization energy within periods 2, 3, and 4 can be explained by considering the electron configuration and the concept of effective nuclear charge. The presence of stable electron configurations, such as half-filled or filled orbitals, can lead to lower ionization energy values compared to neighboring elements. This understanding helps explain the observed trends in ionization energy and highlights the importance of electron configuration in determining the physical properties of elements.
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T = 409.5 K, P = 1.50 atm: V = ?L
Explanation:
T = 409.5 K, P = 1.50 atm: V = 22.4 L The ideal gas law is: PV = nRT where. P = pressure. V = volume n = number of moles.
TRUE OR FALSE: Water is always made up of
the same atoms (H20) when frozen in
glaciers, to becoming water vapor in the
atmosphere or liquid water in a drinking
glass.
Answer:
true
Explanation:
the chemical structure of water won't change becase all of these changes are physical, not chemical
Water is made of hydrogens and oxygen atoms. One mole of water is written as H₂O. Thus one water molecule contains, two hydrogens and one oxygen atom. At any state or phase water have the same atoms. Thus the statement is true.
What is states of matter?Matter can have three states namely gas, liquid and solid. In gaseous state, molecules or atoms of the substance are far apart and easily diffuses everywhere.
In liquid state, the atoms are connected by an intermolecular force and they can be even more close to form the solid state where they are closely packed to have a certain mass, volume and shape.
Atoms can neither be created nor be destroyed but they can be regrouped in chemical reactions. Every substance are made of atoms. A substance is made of two or more atoms and forms its identity. At any stage or phase the identity of item never change.
Therefore, water contains the same atoms hydrogen and oxygen in all stages namely in ice stage, liquid stage and gas phase. Thus, the statement is true..
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use multisim and I
need calculous
The problem to be solved is the
design of a traffic light to control an intersection of two
avenues. In addition, said traffic light must serve the vehicular
crossin
Adhere to traffic regulations and guidelines throughout the process.
To design a traffic light system for an intersection using Multisim software and calculus, follow these steps. First, define the intersection and determine traffic flow. Next, establish the traffic light phases based on the traffic patterns. Use calculus to calculate the durations of each phase, considering factors like traffic volume and pedestrian crossing times. Create an optimization problem, setting an objective function to minimize delays and congestion.
Solve the optimization problem using calculus techniques and numerical methods. Implement the optimized timings in Multisim to simulate the traffic light system. Evaluate the simulation results, refine the timings if needed, and consider factors such as pedestrian safety and emergency vehicle prioritization. Adhere to traffic regulations and guidelines throughout the process.
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What is the relationship between the melting points of impure substances and pure substances?
Answer:
Impure substances tend to have a slightly lower melting point than the pure substance.
Explanation:
An isotope of an element has a different number of _____.
neutrons
protons
electrons
I believe that the answer is
A) Neutrons
I hope this helps you ^-^
Answer:
neutrons
Explanation:
Why are coal, oil, and natural gas all classified as "fossil" fuels? Responses They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay. They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay. Radioactive dating estimates the age of the organisms as formed from to prehistoric times. Radioactive dating estimates the age of the organisms as formed from to prehistoric times. They often contain the impressions of organisms when removed from the ground. They often contain the impressions of organisms when removed from the ground. They are all formed from ancient inorganic material that was covered by seawater for millions of years.
They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay.
What are organic materials?
Organic materials are those that contain carbon and hydrogen atoms. These materials are typically derived from living organisms or their remains, such as plants and animals. Organic materials can be found in various forms such as solids, liquids, and gases. Some examples of organic materials include wood, paper, cotton, wool, leather, petroleum, and natural gas. These materials are used in a wide range of applications, from building construction to clothing production to energy generation.To know more about organic materials, click the link given below:
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what is the ph of 0.194 m trimethylamine (kb = 6.3x10-5). enter ph to 3 decimal places.
The pH of the 0.194 M trimethylamine solution is approximately 11.143. To find the pH of a solution of trimethylamine, we need to consider its basicity and the equilibrium reaction with water.
The equilibrium reaction of trimethylamine (CH₃)₃N with water (H₂O) can be represented as follows:
(CH₃)₃N + H₂O ⇌ (CH₃)₃NH⁺ + OH⁻
Given that the base dissociation constant (\(K_b\)) of trimethylamine is 6.3 × 10⁻⁵, we can use this information to determine the concentration of hydroxide ions (OH⁻) in the solution. Since the concentration of hydroxide ions is directly related to the basicity, we can then calculate the pOH and finally obtain the pH.
First, we need to find the concentration of OH⁻ ions using Kb:
Kb = [OH⁻][CH₃)₃NH⁺] / [(CH₃)₃N]
Let x be the concentration of OH⁻ ions formed.
\(K_b = x \times x / (0.194 - x)\)
Since x is much smaller than 0.194, we can approximate 0.194 - x as 0.194:
6.3 × 10⁻⁵ = x² / 0.194
Simplifying the equation, we have:
x² = 6.3 × 10⁻⁵ × 0.194
\(x = \sqrt {(6.3 \times 10^{-5} \times 0.194)}\)
x ≈ 0.001394
Now, we can find the pOH:
\(pOH = -log_{10}([OH^{-}]) = -log_{10}(0.001394) \approx 2.857\)
Finally, we can find the pH:
pH = 14 - pOH = 14 - 2.857 ≈ 11.143
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P=Q
S
−20
Q
D
=95−
2
3
P
Using the two equations above, what is the equilibrium price? What is the equilibrium quantity? A. P=25,Q=55 8. P=30,Q=50 C. P=35,Q=45 D. P=40,Q=40 QUESTION 21 Click Sare and Submit fo save and submit. Chick Sase All Ansters fo save all ansuers.
The correct answer is D. P = 40, Q = 40.
The equilibrium price is determined by the point where the quantity demanded equals the quantity supplied in a market.
From the given equations, we have:
P = Q
S
−20
Q
D
= 95−
2
3
P
To find the equilibrium price and quantity, we need to set the quantity demanded equal to the quantity supplied, as equilibrium occurs when these two quantities are equal.
Q
S
−20 = 95−
2
3
P
Simplifying the equation, we get:
Q = 115 −
2
3
P
Since P = Q, we can substitute P for Q in the equation:
P = 115 −
2
3
P
Multiplying through by 3 to eliminate the fraction, we have:
3P = 345 − 2P
Combining like terms:
5P = 345
Dividing both sides by 5:P = 69
So the equilibrium price is P = 69.
Substituting this value back into the equation P = Q, we find:
Q = 69
Therefore, the equilibrium quantity is Q = 69.
The correct answer is D. P = 40, Q = 40.
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What state had the fewest farms? Wisconsin Georgia Illinois