8. What did the Dust Bowl teach us?
A. Without increases in yields, famines would be more common.
B. Plants can't thrive without fertilizer.
C. Soil is a resource that must be conserved.
D. Nature has the ultimate power to destroy.​

Answer:

False

Explanation:

It is impossibke to know the exact location of an electron.

Answer:

2N2 + O2 ⇒ 2N2O

Explanation:

Since I cannot see the product's of the second chemical equation I will only solve the first one.

In order to balance a chemical equation you need to make sure that the atoms on both sides are equal.

In this case we have...

N2 + O2 = N2O

N = 2

O = 2

N = 2

O = 2

Change the coefficient:

N2O = 2N20

2 × 2 = 4

1 × 2 = 2

2N2 + O2 ⇒ 2N2O

Hope this helps.

The standard cell potential for the given reaction Cu(s) + Ag+(aq) ⟶ Cu2+(aq) + Ag(s) is +0.46 V.

Standard cell potential is calculated using the Nernst equation. It is represented as

E°cell = E°cathode - E°anode

Where, E°cell is the standard cell potential E° cathode is the standard reduction potential of the cathode E°anode is the standard oxidation potential of the anode

Given reaction is Cu(s) + Ag+(aq) ⟶ Cu2+(aq) + Ag(s)

We can write the half-cell reactions as

Cu2+(aq) + 2e- ⟶ Cu(s)

E°Cu2+/Cu = +0.34 V

Ag+(aq) + e- ⟶ Ag(s)

E°Ag+/Ag = +0.80 V

Substituting these values in the formula,

E°cell = E°cathode - E°anode

E°cell = +0.80 V - (+0.34 V)

E°cell = +0.46 V

Therefore, the standard cell potential for the given reaction is +0.46 V.

Standard cell potential is a measure of the voltage of an electrochemical cell under standard conditions. It can be calculated using the Nernst equation. This equation relates the standard cell potential to the standard reduction potentials of the cathode and anode.

The standard reduction potential is the potential difference between the reduction of a species and the reduction of the standard hydrogen electrode  under standard conditions. The standard oxidation potential is the potential difference between the oxidation of a species and the reduction of the SHE under standard conditions. The standard cell potential is positive if the reaction is spontaneous and negative if the reaction is nonspontaneous.

The standard cell potential for the given reaction Cu(s) + Ag+(aq) ⟶ Cu2+(aq) + Ag(s) is +0.46 V.

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Tennessine (Ts)

Element #117

Discovered: April 5, 2010

We can calculate the mass percent of the acid in the solution as follows: mass percent of H2A = mass of H2A / mass of solution × 100% = 1.290 g / 11 g × 100% = 11.73% . Therefore, the mass percent of the unknown monoprotic acid in the solution is 11.73% .

The solution is to find the mass percent of the unknown monoprotic acid in the solution, knowing the molar mass of the acid. Let's first write the balanced chemical equation for the neutralization reaction between the acid and Ca(OH)2:H2A + Ca(OH)2 → CaA2 + 2H2OWhere H2A represents the unknown monoprotic acid and CaA2 is the calcium salt of the acid, which is formed in the reaction.

We can see from the equation that one mole of Ca(OH)2 reacts with one mole of H2A.So, we can calculate the number of moles of H2A that was present in the solution as follows: moles of Ca(OH)2 used = volume of Ca(OH)2 solution × molarity of Ca(OH)2 solution = 39.6 mL × (0.19 mol/L) / 1000 mL/L = 0.007524 mol The balanced equation tells us that 1 mole of Ca(OH)2 reacts with 1 mole of H2A.

Therefore, the number of moles of H2A present in the solution is also 0.007524 mol.

Next, we can calculate the mass of H2A that was present in the solution as follows: mass of H2A = number of moles of H2A × molar mass of H2A = 0.007524 mol × (171.6 g/mol) = 1.290 g .

Finally, we can calculate the mass percent of the acid in the solution as follows: mass percent of H2A = mass of H2A / mass of solution × 100% = 1.290 g / 11 g × 100% = 11.73% . Therefore, the mass percent of the unknown monoprotic acid in the solution is 11.73% .

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You did not provide any options.

From what we understand, we can confirm that this statement is in fact false.

This statement is false due to the impossible nature of achieving absolute zero temperatures in any controlled environment. This is the case given that attempting to cool a substance to absolute zero cannot be done without already having one such substance, given that any other will reach an equilibrium at a higher temperature than 0 K. It is also not possible to fully nullify the internal energy of any system due to our current understanding of physics.

Therefore, we can confirm that because reaching absolute zero is virtually impossible, the statement in this question is in fact false.

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Mass of water = 8.84 g

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

c of water = 4.182 J / g ° C  

Q = 925 J

mass of water :

\(\tt Q=m.c.\Delta T\\\\925=m\times 4.182\times (40-15)\\\\m=8.84~g\)

Answer:

3x10^24 atoms to 1 sig fig

Explanation:

By definition, there are 6.022x10^23 atoms in a mole.

Multiply this by the 5 moles of silver to find the atoms of silver.

(5 moles)*(6.022x10^23 atoms/mole) = 30.110x10^23 atoms

3x10^24 atoms to 1 sig fig

The mass of 3.012 x 10^24 Ca2+ ions is approximately 20.03 g.

Molar mass is defined as the ratio between the mass and the amount of substance of any sample of said compound.

To find the mass of a specific number of ions, we can use the molar mass of the ions.

Given:

Ca2+ ion has a molar mass of 40.08 g/mol

Number of Ca2+ ions = 3.012 x 10^24

First, let's convert the number of ions to moles:

moles = (3.012 x 10^24 ions) / (6.022 x 10^23 ions/mol)

moles = 0.5012 mol

Next, let's multiply the number of moles by the molar mass to get the mass in grams:

mass (g) = moles * molar mass (g/mol)

mass (g) = 0.5012 * 40.08 g/mol

mass (g) = 20.03 g

Therefore,The mass of 3.012 x 10^24 Ca2+ ions is approximately 20.03 g.

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Answer:

Recessive

Explanation:

Hope this help I think this is the right answer.

Structural Formula of Ethene: H2C=CH2
Structural Formula of Ethane: CH3-CH3

This reaction is known as hydrogenation.

The question asks for the structural formulas of the products and the name of the reaction mechanism for three given reactions. However, the specific reactions and their corresponding mechanisms are not provided.

To provide a helpful response, I'll give you an example of a reaction, its products, and the name of the mechanism.

Example:

Reaction: The reaction of an alkene with hydrogen gas (H2) in the presence of a catalyst (e.g., platinum) to form an alkane.

Products: In this reaction, the alkene reacts with hydrogen to form an alkane. For example, if the alkene is ethene (C2H4), the product would be ethane (C2H6).

Structural Formula of Ethene: H2C=CH2
Structural Formula of Ethane: CH3-CH3

Reaction Mechanism: This reaction is known as hydrogenation. Hydrogenation is a type of addition reaction, where hydrogen atoms are added across the carbon-carbon double bond of the alkene to form a single bond and convert it into an alkane.

Please note that without specific reactions provided, I can only give you an example to illustrate the process of determining the products and reaction mechanism. If you have specific reactions in mind, please provide them, and I will be glad to assist you further.

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Answer: Explanation:

Water wheels have several important parts that work together (see diagram).

*Flowing water (delivered via a channel called a mill race)

*Large wooden or metal wheels.

*Paddles or buckets (arranged evenly around the wheel)

*Axle.

*Belts or gears.

Answer:

The conventional oven and the convection oven are confused with each other due to their similar look and style, and a lot of their functioning is quite the same as well.

The conventional ovens have existed for over half a century, and have derived their functioning from traditional ovens that are over 4,000 years. They function with a bottom-up heat transfer from a fixed burner source.

The convection ovens were made recently as a way to get better heating results for all types of dishes and recipes, with the introduction of a fan system along with an exhaust which allows the circulation of hot air around the cavity of the oven.

Explanation:

There are approximately 7.93 × 10^23 atoms of copper in the copper wire with a mass of 84 grams.

To determine the number of atoms of copper (Cu) in a copper wire, we need to use the molar mass of copper and Avogadro's number.

The molar mass of copper (Cu) is 63.55 g/mol.

First, we need to calculate the number of moles of copper in the wire:

Number of moles = Mass / Molar mass

Number of moles = 84 g / 63.55 g/mol ≈ 1.32 moles

Next, we use Avogadro's number, which is approximately 6.022 × 10^23 atoms per mole, to calculate the number of atoms:

Number of atoms = Number of moles × Avogadro's number

Number of atoms = 1.32 moles × 6.022 × 10^23 atoms/mol ≈ 7.93 × 10^23 atoms

Therefore, there are approximately 7.93 × 10^23 atoms of copper in the copper wire with a mass of 84 grams.

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In ionic bond formation, the lattice energy of ions increases as the magnitude of the ion charges increases and the radii decreases.

Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges. When the valence (outermost) electrons of one atom are permanently transferred to another atom, a bond of this kind is created.

The energy that changes when one mole of a crystalline ionic compound is formed from its component ions, which are assumed to initially be in the gaseous state, is known as the lattice energy. It gauges the cohesive forces that hold ionic solids together.

As the radius of ions increases the distance between their ions increases. Finally, less lattice energy is released during the process.

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The partial pressure inside a gas mixture shall consist of the notional pressure of that constituent gas if the whole quantity of its starting material alone was occupied at the same temperature. The partial gas pressure is a measure of thermodynamic action in the particles of a gas, and the calculation can be defined as follows:

Given:

\(\to \bold{ P_T=3.50 \ atm}\\\\\to \bold{P_B=1.25 \ atm}\\\\\)

To find:

partial pressure=?

Solution:

Using formula: \(\bold{P_T=P_A+P_B}\\\\\)

                   \(\to \bold{3.50=P_A+1.25}\\\\\to \bold{P_A=3.50-1.25}\\\\\to \bold{P_A=2.25}\\\\\)

As we know that pressure is not negative and as \(\bold{P_T}\) is total pressure so, it has a large value, and\(\bold{ P_A , P_B}\) is partial.

Therefore, the final answer is "Option C".

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Answer:

B. polar covalent

Explanation:

Answer:

37.5 L

Explanation:

Initial Volume, V1 = 15L

Initial Pressure P1 = 4.5 atm

Final Pressure, P2 = 1.8 atm

Final Volume V2 = ?

The relationship between these variables is given as;

P1V1 = P2V2

V2 = PIV1 / P1

Inserting the values;

V2 = 4.5 * 15 / 1.8

V2 = 37.5 L

Answer: The new volume is 37.5L

Explanation:

The question is solved using the principle and formula of a gas law known as the Boyle's law. Boyle's law states that provided the temperature remains constant, the volume of a given mass of gas is inversely proportional to its pressure. Expressing the statement mathematically:

P ∝ 1/V, (where p is equal to pressure and V is volume)

Therefore PV = a constant

If a gas at pressure P1 and Volume V1 changes at constant temperature to pressure P2 and volume V2 then:

P1V1 = P2V2.

Using the formula to solve the question:

P1 = 4.5atm

P2 = 1.8atm

V1= 15L

V2 = ?

V2 = P1V1/P2

V2= 4.5 × 15 /1.8

V2 = 67.5/1.8

V2 = 37.5 L

Therefore the new volume is 37.5L

Answer:

the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.

Answer: A balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Explanation:

A balanced chemical equation is defined as the equation which contains same number of atoms on both reactant and product side.

Hence, balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is as follows.

\(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\)

Here, number of atoms present on reactant side are as follows.

Number of atoms present on product side are as follows.

Since, there are same number of atoms present  on both reactant and product side. Therefore, this equation is balanced.

Thus, we can conclude that balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Answer:

30

Explanation:

Given that;

  the compound contains nitrogen and oxygen in the ratio 1:1;

       We can say the compound is NO

Now,

Molecular mass of NO;

 Molar mass of N = 14g/mol

 Molar mass of O = 16g/mol

Molecular mass of NO = 14 + 16  = 30g/mol

Answer:  

Graduated cylinder

Explanation:

A graduated cylinder is used routinely for measuring volume and is considered more accurate than a beaker because of the permanently-marked incremental graduations incorporated in the clear cylinder.

PLS MARK BRAINLIEST

Answer:

Sb

Explanation:

Sb (antimony) is an metalloid

To produce 5.0 kg of water, you would need approximately 0.555 kg of hydrogen gas and 0.278 kg of oxygen gas.

Water (H₂O) consists of two hydrogen atoms (H) and one oxygen atom (O). To produce 5.0 kg of water, you would need an equal amount of hydrogen gas (H₂) and oxygen gas (O₂) in a 2:1 ratio, as water has the chemical formula H₂O. The molar mass of hydrogen is 2 g/mol, and the molar mass of oxygen is 32 g/mol.

To calculate the total mass of hydrogen and oxygen needed, we can use the molar ratios:

Mass of hydrogen gas (H₂) = (2/18) * 5.0 kg = 0.555 kg

Mass of oxygen gas (O2) = (1/18) * 5.0 kg = 0.278 kg

Therefore, to make 5.0 kg of water, roughly 0.555 kg of hydrogen gas and 0.278 kg of oxygen gas are required.

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Answer:Aluminum metal in silver nitrate ….

You might be expecting silver metal, Ag, and aluminum nitrate, Al(NO3)3, as products. But instead all you will end up with is wet aluminum. The passivating layer of Al2O3 will prevent aluminum from reducing silver ions.

Explanation: Al(s) + AgNO3(aq) → No reaction

The two things we might do to the mixture to disrupt the Al2O3 surface will cause the Ag+ ions to react. Often a source of chloride ion is used because AlCl4^- will form, exposing the aluminum surface. But that will cause AgCl(s) to precipitate. You can also make the solution basic with NaOH and form Al(OH)4^-, but that will cause Ag2O(s) to form. (You will get Ag2O instead of AgOH.)

Concentrated acids will oxidize any aluminum metal that might be exposed if you were to add concentrated HNO3. That would simply enhance the

Total positive charge in 1.80 kg of plutonium is 13365,04 x 10^4 C

Solution:

1 mole of plutonium = 244 gm

3.6 kg of plutonium = 3.6 x 1000 = 3600 gm

Number of moles = 3600/244 = 14.754 moles

One moles of plutonium contains protons 6.023 x 10^23 x 94

Total number of protons in 14.754 moles = 6.023 x 10^23 x 94 x 14.754

                                                                    = 8353.15 x 10^23

Total Positive charge = 8353.15 x 10^23 x 1.6 x 10^-19

Total positive charge = 13365,04 x 10^4 C

The mole, represented by the symbol mol, is the fundamental SI unit of material quantity. The amount of a substance determines how many elementary entities of that substance are present in an object or sample. Since the SI fundamental units were revised in 2019, the mole is now exactly defined as 6.022140761023.

The amount of a substance determines how many elementary entities of that substance are present in an object or sample. Since the SI fundamental units were revised in 2019, the mole is now exactly defined as 6.022140761023.

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