The Great Lakes ecosystem has been severely damaged by more than 180 invasive and non-native species. Species such as the zebra mussel, seen here, the quagga mussel, round goby, sea lamprey, and alewife reproduce and spread uncontrollably. It is extremely difficult to control the spread of an invasive species once it is established, which makes prevention the most effective way to deal with organisms that have not yet entered or become established in the Great Lakes.

What is one of the most effective ways to stop invasive animal species from entering the Great Lakes ecosystem?
a
Making an extensive invasive species collection record for the Great Lakes region.
b
Giving presentations to schools throughout the state so students can share this information with their parents.
c
Inspecting entering boats to stop the inflow of invasive species into the Great Lakes.
d
Using effective biocides to kill the invasive species.

Answer:

22.4L

Explanation:

not sure if its totally correct but I tried

Answer:

If you increase temperature, you increase entropy. (1) More energy put into a system excites the molecules and the amount of random activity. (2) As a gas expands in a system, entropy increases.

Answer:

molecular so number 3. ...

Answer:

36dm³

Explanation:

For this question we are required to find the volume of the ethyne which is released while reacting 6 grams of water with calcium carbide.

Here to find the volume of ethyne produced, we can find the moles of the ethyne in the reaction by using the mole concept, and then converting the mol into the volume using the formula V=nRT/p or PV=nRT (n being the moles of the gas)

When the temperature drops to 24°C, the volume of the nitrogen gas in the tank will be approximately 12.64 m^3.

When considering the relationship between the volume of a gas and its temperature, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature when pressure is held constant. The formula for Charles's Law is:

V1/T1 = V2/T2

Where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature. In this case, we have:

V1 = 14.3 m^3
T1 = 62°C + 273.15 (convert to Kelvin) = 335.15 K
T2 = 24°C + 273.15 (convert to Kelvin) = 297.15 K

Now we can solve for V2:

(14.3 m^3) / (335.15 K) = V2 / (297.15 K)

V2 = (14.3 m^3) * (297.15 K) / (335.15 K)

V2 ≈ 12.64 m^3

When the temperature drops to 24°C, the volume of the nitrogen gas in the tank will be approximately 12.64 m^3.

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Phenolphthalein is a drab, vulnerable acid that is appreciably used as a hallmark in titration experiments to suggest the endpoint of the titration. The endpoint is indicated with the useful resource of the formation of red color on the grounds that this compound dissociates to shape crimson anions at the same time as dissolved in water.

Titration of an antacid consists of a strong acid-susceptible base titration whose pH at the endpoint is plenty much less than seven. therefore, bromophenol blue rather than phenolphthalein is used as a trademark because the pH range of bromophenol blue is a whole lot less than seven. The pH range of phenolphthalein lies above seven.

The use of CO₂ and its impact on the signs, Phenolphthalein is often used as a hallmark in acid-base titrations. Phenolphthalein is often used as an indicator in acid-base titrations. For this utility, it turns colorless in acidic answers and crimson in simple solutions. It belongs to the elegance of dyes referred to as phthalein dyes.

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Answer:The nucleus contains two types of subatomic particles,  

       protons and neutrons.

Explanation:The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus.

1. A proper progression utilizing conversion factors would be km to feet to inches.

2. Conversion factors allow you to effectively cross out the appropriate units along each step of the problem.

3. 246,000 mm is how many Km is 0246.

4. There are 2 electrons in the s orbital, and 3 in the p orbital.

A conversion factor is a number used to convert one set of units to another set by multiplication or division. If the conversion is required, the values ​​should be equal using the appropriate conversion factor. To find the electron configuration of an atom, we first need to know how many electrons the atom has. Aluminum has an atomic number of 13, so it has 13 electrons.

The last shell after the electron configuration is called the valence shell. The total number of electrons in the valence shell is called valence electrons. The electron configuration of the aluminum shows that there are three electrons in the last shell of aluminum. Therefore the valence electron of aluminum is 3 The outermost valence shell of aluminum has three electrons. Al now has an electronic configuration similar to the noble gas neon so it can donate three electrons to form a cation.

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The closest to the partial pressure of O₂ after the system has reached equilibrium is 0.5 atm, because K is very large, nearly all the SO₂ is consumed before the system reaches equilibrium, but an excess amount of O₂  remains at equilibrium. the correct answer is B.

Chemical equilibrium is the condition in which the concentrations of the reactants and products are equal and have no further tendency to fluctuate over time, with no discernible change in the features of the system.

The equilibrium moves to the side of the reaction where there are less moles of gas as the pressure increases. When the pressure decreases, the equilibrium moves to favor the reaction that produces more gas molecules.

Partial pressure is inversely proportional to volume, according to the ideal gas law. Additionally, it correlates with both the temperature and the amount of moles.

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The equilibrium constant (K) for the given reaction is approximately 5.5 × 10^77. This suggests that the reaction strongly favors product formation at equilibrium, given the large value of K.

The relationship between the standard free energy change (ΔG°) and the equilibrium constant (K) for a reaction is given by the following equation:

ΔG° = -RT ln(K)

where R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin, and ln is the natural logarithm.

To calculate the equilibrium constant for the given reaction, we need to rearrange the equation as follows:

ln(K) = -ΔG°/RT

Substituting the given values into the equation, we get:

ln(K) = -(-450,000 J/mol) / (8.314 J/mol·K × 298 K)

ln(K) = 178.8

Taking the exponential of both sides, we get:

K = e^(ln(K))

K = e^(178.8)

K ≈ 5.5 × 10^77

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The reason we learn an algebraic method to balance chemical equations instead of using a trial-and-error method is because the algebraic method is more efficient and reliable.

Using trial and error can be time-consuming and may not always lead to the correct solution. Balancing chemical equations requires ensuring that the number of atoms of each element on both sides of the equation is equal. This can become complex when dealing with more complicated equations.

The algebraic method, on the other hand, provides a systematic approach that can be applied to any chemical equation, regardless of its complexity. By applying mathematical principles and using variables, we can determine the correct coefficients to balance the equation. This method is programmable, which means we can use computer algorithms to solve equations more quickly and accurately.

Additionally, the algebraic method allows us to analyze whether a reaction can actually be balanced. It helps us understand the stoichiometry of the reaction and determine the correct ratios of reactants and products.

Contrary to the belief that it is only meant to complicate things, learning this method is essential for a deeper understanding of chemistry and problem-solving skills. It enables us to apply logical thinking and mathematical concepts to chemical reactions, which is crucial in various scientific and industrial applications.

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Answer:

4.similar properties

5.electrons are very reactive

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

Answer:

a bacterium with a rigid spiral structure,found in stagnant water and something causing disease

Answer:

A. and C.

Explanation:

The ears job is to keep our body at the right temperature while hearing sounds.

Answer:

a collection device in the area that counts the number of mosquitoes caught weekly

Explanation: just bcuz

This is incorrect because the ice has changed its composition.

A melting ice cube takes on a different shape as it begins to flow. Its makeup doesn't alter, though.

A physical change is an example of melting. A physical change is when a sample of matter undergoes a change that affects some of the material's attributes but not its identity.

The term "physical change" refers to the tearing, breaking, grinding, changing the state of matter, and dissolving of a substance. Exothermic reactions' opponent is known as an endothermic reaction. From their surroundings, they take in heat energy. This indicates that endothermic reactions make their surroundings colder as a result of the reaction. This sort of response can be seen in the melting of ice.

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The temperature, T2, is 359°C.

1st) We need to identify the volume and the temperature of the gas in the point A (initial state of gas) and point B (final state of gas):

- Point A:

V1= 1.65x10^3 L

T1= 43°C (316K)

-Point B:

V2= 3.30x10^3 L

T2= unknown

2nd) With the Ideal Gas Law and assuming there is no change in pressure or amount of gas in the balloon, we calculate the temperature in point B with the formula that relates temperature and volume:

It is important to use the units of the ideal gas constant, so the units must be in Kelvin (K) and liters (L). That's why the temperature (T2) it is 316 K.

3rd) Finally, it is necessary convert the Kelvin unit into Celsiud degrees:

So, the temperature, T2, is 359°C.

The type of reaction is a double replacement reaction. In a double replacement reaction, the positive ions of two compounds switch places to form two new compounds.

The balanced chemical equation for the reaction between magnesium and lead(II) nitrate is:

Mg(s) + Pb(NO3)2(aq) -> Mg(NO3)2(aq) + Pb(s)

In this equation, the magnesium and lead ions switch places to form the new compounds magnesium nitrate and lead. The coefficients in front of the compounds indicate the number of moles of that substance that are involved in the reaction. The subscripts indicate the number of atoms of each element in each compound.

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1.78 grams of silver can be produced from 1.40 g silver nitrate and excess copper. The balanced chemical equation for the reaction of copper with silver nitrate (use cu2) is as follows: Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

To determine how many grams of silver can be produced from 1.40 g of silver nitrate and excess copper, we first need to calculate the limiting reactant.

The stoichiometry of the reaction is such that 2 moles of silver nitrate react with 1 mole of copper to produce 2 moles of silver. The molar mass of silver nitrate is 169.87 g/mol while that of copper is 63.55 g/mol,

therefore, the number of moles of silver nitrate present in 1.40 g can be calculated as follows:Number of moles of silver nitrate = mass/molar mass= 1.40/169.87= 0.008240 molSimilarly, the number of moles of copper required to react with this quantity of silver nitrate is 0.004120 mol (half of the number of moles of silver nitrate).

Since there is an excess of copper, it will not limit the reaction and hence the limiting reactant is silver nitrate.To calculate the mass of silver produced, we use the molar mass of silver, which is 107.87 g/mol.Mass of silver produced = number of moles of silver x molar mass= 0.01648 x 107.87= 1.78 g

Therefore, 1.78 grams of silver can be produced from 1.40 g silver nitrate and excess copper.

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Answer:

salt is salty in taste.......

Answer:

Neutrons, Atomic Number, Atomic Mass

Explanation:

The Atomic mass is used to calculate the number of Neutrons in an atom.

Every atom is composed of Protons and Neutrons forming a tight compact nucleus orbited by electrons. The Atomic number of an element tells how many Protons the nucleus has. This is important because it determines how many electrons the atom has and consequently, its chemical properties. The Atomic mass (rounded to the nearest whole number) is the sum of the Protons and Neutrons in the elements nucleus, since their masses are nearly identical (Neutrons have one electron worth more mass than Protons). You subtract an element's Atomic number from its Atomic mass and you get the number of neutrons the element has in the nuclei of its atoms.

Mechanical weathering can significantly affect the rate of chemical weathering. When rocks are physically broken down into smaller fragments through processes like abrasion, frost wedging, or root expansion, the surface area of the rock increases.

This increased surface area provides more exposure to chemical agents like water, oxygen, and acids, accelerating the chemical weathering process.

The smaller particles resulting from mechanical weathering provide more contact points for chemical reactions to occur. Water can penetrate deeper into the rock, allowing chemical reactions to take place more readily.

Additionally, the fractured structure of the rock provides pathways for chemical agents to penetrate and react with the minerals, causing them to break down and dissolve more easily.

Overall, mechanical weathering enhances the effectiveness of chemical weathering by increasing the surface area and facilitating the access of chemical agents, leading to a faster breakdown of minerals and the transformation of rock over time.

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In a titration involving strong acids and bases, finding the pH when both components are present is relatively straightforward.

The general procedure is as follows:

Determine the initial concentrations: Calculate the initial concentrations of the strong acid and the strong base. This information is usually provided in the problem or can be obtained from the known volumes and concentrations of the solutions used in the titration.

Calculate the moles of acid or base: Determine the number of moles of acid or base present in the solution based on the initial concentrations and volumes used in the titration.

Determine the limiting reagent: Identify the limiting reagent by comparing the moles of the acid and the base. The limiting reagent is the one that is completely consumed during the neutralization reaction.

Calculate the excess amount: If one of the components is present in excess, calculate the amount of excess by subtracting the moles of the limiting reagent from the initial moles of the component.

Determine the resulting pH: If the strong acid is in excess, the resulting solution will be acidic, and the pH can be calculated directly from the concentration of the acid using the appropriate equation for strong acids.

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Answer:

Explanation:

This is lechatlier's principle, which basically talks about how adding or taking away things will disrupt equilibrium and the system will act a certain way to restore equilibrium

1. adding NH3 causes the equilibrium to shift left - produce more reactants

2. removing N2 causes the equilibrium to shift left - produce more reactants

3.  same as number 2

4. decreasing pressure causes equilbrium to shift to the side with more moles so it shifts left and produces more reactants

5. catalyst doesn't change anything about equlibrium, it only affects the reaction's rate

Le Chatelier's principle is a principle which predicts the effect of change in condition on a the position of a equilibrium.  

Change could be in Temperature, Moles(Concentration), Pressure.

-------------------------------------------------------------------------------------------------------------

We could change the temperature by increasing or decreasing it, and there are two types of reactions, endothermic or exothermic, both have different outcomes by changing the condition.

__________________________________________________________

In Endothermic,

When we increase the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards right i.e. product side.

When we decrease the temperature, It will favor the formation of reactants thus MORE reactant will be formed - equilibrium will shift towards left i.e. reactants side.

__________________________________________________________

In Exothermic,

When we increase the temperature, It will favor the formation of reactants thus MORE REACTANT will be formed - equilibrium will shift towards left i.e. reactants side.

When we decrease the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards the right i.e. product side

When we increase the pressure, The equilibrium shifts towards the fewer moles of a gas. Wherever there are less moles, it could be any, reactant or product, the increase of Pressure will favor in formation of them.

When we decrease the pressure, The equilibrium shifts towards the more moles of a gas. So whether reactants or product have the higher moles, the decrease in pressure will favor in the formation of them.

When we increase the concentration of moles of any substance, The equilibrium will shift away from that substance. So if we want to make more product and there are more moles of reactant present, then Increase the concentration of reactants.

When we decrease the concentration of any substance, The equilibrium will shift towards that substance. So if we want to make more product, decrease its concentration or add more reactant.

By the use of the catalyst, There is no effect on the equilibrium. The rate of  both forward and backward reaction are increased with the equal amount.

By keeping that in mind,

A) Extra \(NH_{3}\) will shift the equilibrium towards left i.e. more reactants will be formed.

B) Extra N2 is removed, the equilibrium will shift towards the left i.e. more reactants will be formed.

C) N2 is added, the equilibrium will shift towards right i.e. more PRODUCT will be formed. (I assumed there was a typing error and it meant Addition instead of removal)

D) When we decrease the pressure the equilibrium will shift towards the left i.e. more reactant will be formed.

E) Catalyst has no effect on the system

Answer:

2.coefficient how many molecules of Aluminum hydroxide there are

An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

An atom X has 12 protons and 12 electrons that means X is a neutral atom and the atomic no. is 12 because total no. of protons is equal to atomic number. When it looses the 2 electrons then atom becomes positively charged ion . the charge on the ion is +2.

now, the no. of protons will be = 12

number of electrons will be = 12 - 2 = 10

Thus, An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

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Answer:

c is the answer

step by step explanation is not

The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.

Hence, option D is correct answer.

A double covalent bond is a type of covalent bond which involves the sharing of two pairs of electrons.

A covalent bond is a type of chemical bond that involves the sharing of electron pairs between the atoms.

Now lets check all options one by one

Option (A): CH₃Cl

In CH₃Cl carbon has 4 valence electrons and carbon shares its 1 electron each with three hydrogen atoms and carbon shares its 1 electron with chlorine. Here bonds are formed due to sharing of electrons between the atoms. Hence CH₃Cl is covalent bonded.

So, it is incorrect option.

Option (B): C₂H₃Cl

In  C₂H₃Cl, here two carbon atoms form double bond but they not form covalent bond.

So it is incorrect option.

Option (C): C₂H₂

In C₂H₂, each carbon has 4 valence electrons and each carbon shares its   one electron with each hydrogen atom here two carbon atoms are triple bonded.

So, it is incorrect option.

Option (D): C₂H₄

In C₂H₄, there are two carbon atoms and two hydrogen atoms, here two carbon atoms are double bonded.

So, it is correct option.

Thus, from above conclusion we can say that The formula which represent a hydrocarbon with a double covalent bond is C₂H₄.

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The ratio of effusion rates for the lightest gas H₂ to the heaviest known gas UF₆ is 13.21 to 1

Effusion is a process by which a gas escapes from its container through a tiny hole into evacuated space.

Rate of effusion ∝ 1/√Ц, (where Ц is molar mass)

Rate H₂ = 1/√ЦH₂

Rate UF₆ = 1/√ЦUF₆

Therefore, Rate H₂/ Rate UF₆ = √ЦH₂/√ЦUF₆

ЦH₂= 2.016 g/mol

ЦUF₆= 352.04 g/mol

Rate H₂ / Rate UF₆ = √352.04/√2.016 = 18.76/1.42

Rate H₂ / Rate UF₆ = 13.21

Therefore, H₂ is lower mass than UF₆. Thus H₂ gas will effuse 13 times more faster than UF₆ because the most probable speed of H₂ molecule is higher; therefore, more molecules escapes per unit time.

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