part c.1. the water level in the co2(g)-collection cylinder is higher than the water level outside the cylinder. see margin drawing. (page 188).

Answer:

1 and 2

Explanation:

When Concentrated H2SO4 reacted with the alcohols, they produce cycloalkenes. This is a mechanism known as dehydration of alcohols with an acid catalyst. This is because concentrated H2SO4 acts as a great oxidizing agent. In the process, the alcohols are heated to a high temperature with an excess of pure sulfuric acid. By passing the gases through a sodium hydroxide solution, the carbon dioxide and sulfur dioxide produced by reactive species are eliminated. The reaction mechanism shown in the image below indicates that only compounds 1 and 2 produce only one product.

Answer:

A

Explanation:

In order for plants to entice pollinators, they must first offer their favorite foods: nectar and protein. Since most pollinators fly, the colors of a flower must attract them; therefore, the brighter the flower, the more likely it will be visited. ... For instance, bees are attracted to bright blue and violet colors.

hope this helps you out...

Answer:

If avocado farming has depleted the natural filtration system of the water, it could lead to water pollution from pesticides, fertilizers, and other harmful chemicals used in agriculture. This could negatively impact the health of people who rely on drinking water from these sources, causing illnesses and diseases. Additionally, it could increase the cost of water treatment and purification for the local authorities, which could further impact the affordability of safe drinking water for the local population.

0.65mol \(Alx_{2} (So_{4} )_{3}\) are produced during the reaction.

How many grams of Al2(SO4)3 are produced during the following reaction?

2 Al + 3 H2SO4 → Al2(SO4)3 + 3 H2

Molar mas:26.98 →341.15g/mol

All take 35g.

Moles of aluminum=35/26.98=1.29mol.

2mole of aluminum will give=1/2*1.29=0.65

Therefore, 0.65mol \(Alx_{2} (So_{4} )_{3}\).

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Answer:

Neon

Explanation: The valence electrons of Neon are filled.

Hope it helps you:)))))

Have a good day.

Answer:

Explained below

Explanation:

Group 3A elements are made up of the metalloid - boron (B) and other metals such as Aluminum (Al), gallium (Ga), indium (In), & thallium (Tl).

Now, as we go down the group, the size of the central atom will increase thereby causing the lone pair to become delocalized over a larger volume space. Thus, it's not readily available for donation and thus basicity increases

The compound that acts as the precipitate in this reaction is Pbl₂, or lead(II) iodide.

In the given reaction equation:

KI + Pb(NO3)2 → KNO3 + Pbl₂

The precipitate formed is Pbl₂, which is lead(II) iodide. In the reaction, potassium iodide (KI) reacts with lead(II) nitrate (Pb(NO3)2) to form potassium nitrate (KNO3) and lead(II) iodide (Pbl₂).

Lead(II) iodide is insoluble in water, as mentioned in the statement. When the two chemicals are mixed, lead(II) iodide is formed as a solid precipitate, which appears as a golden substance, as described.

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The standard enthalpy change (∆H°rxn) for the given reaction is -38.0 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases heat to the surroundings.

The standard enthalpies of formation (∆Hf°) for the reactants and products involved in the reaction are: ∆Hf°[NO2(g)] = +33.2 kJ/mol. ∆Hf°[H2O(l)] = -285.8 kJ/mol. ∆Hf°[HNO3(aq)] = -207.2 kJ/mol. ∆Hf°[NO(g)] = +90.4 kJ/mol. We can use these values to calculate the standard enthalpy change (∆H°) for the reaction using the following equation:

∆H°rxn = Σn∆Hf°(products) - Σm∆Hf°(reactants) where n and m are the stoichiometric coefficients of the products and reactants, respectively. Substituting the values, we get:∆H°rxn = [2 × ∆Hf°(HNO3(aq))] + [∆Hf°(NO(g))] - [3 × ∆Hf°(NO2(g))] - [1 × ∆Hf°(H2O(l))]. ∆H°rxn = [2 × (-207.2 kJ/mol)] + [90.4 kJ/mol] - [3 × (+33.2 kJ/mol)] - [1 × (-285.8 kJ/mol)]. ∆H°rxn = -414.4 kJ/mol + 90.4 kJ/mol - 99.6 kJ/mol + 285.8 kJ/mol. ∆H°rxn = -38.0 kJ/mol

Therefore, the standard enthalpy change (∆H°rxn) for the given reaction is -38.0 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases heat to the surroundings.

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This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

To determine the temperature at which the tire will burst, we can use the ideal gas law equation:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Rearranging the equation to solve for temperature, we have:

T = PV / (nR)

Given that the pressure threshold for bursting is 1.4 x 10^3 kPa, the volume is 30 L, and the number of moles of air is 2.5 mol, we can substitute these values along with the ideal gas constant R = 8.314 J/(mol K) into the equation.

T = (1.4 x 10^3 kPa) * (30 L) / (2.5 mol * 8.314 J/(mol K))

Converting kPa to Pa and L to m^3, and simplifying the equation, we find:

T ≈ 20,993 K

This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

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Answer:

increases reaction rates

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

The relationship between the rate of diffusion r, and d is r ∝ 1/√d.

The relationship between the rate of diffusion (r) and the density of a gas (d) can be explained using Graham's law of diffusion. According to this law, the rate of diffusion of a gas is inversely proportional to the square root of its density. Mathematically, it can be expressed as:

r ∝ 1/√d

where the symbol '∝' represents 'proportional to'. The constant of proportionality (k) can be introduced to this equation as:

r = k/√d

This equation shows that as the density of a gas increases, its rate of diffusion decreases. This is because denser gases have more molecules per unit volume and thus, they experience greater intermolecular collisions that hinder their movement. Therefore, it requires more energy for them to diffuse through a medium compared to less dense gases.

The relationship between the rate of diffusion and density is particularly important in understanding the behavior of gases in different environments. For instance, in a gas chromatography column, the rate of diffusion of a gas determines how quickly it moves through the column and separates from other components. Similarly, in the Earth's atmosphere, the rate of diffusion of greenhouse gases such as carbon dioxide affects their concentration and hence, their impact on climate change.

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Answer:  

Greenhouse gas Chemical formula Global Warming Potential, 100-year time horizon

Carbon Dioxide

Methane

Nitrous Oxide

Chlorofluorocarbon

Explanation:

Answer:

If an atom is in column V (or 15), it will most likely gain 3 electrons to fulfill the octet rule.

Explanation:

The octet rule defines the property that atoms have to complete their last energy level with eight electrons to achieve stability through an ionic, covalent or metallic bond.

The pair of electrons that are transferred or gained belong to the last shell of the atom. If an atom is in column V (or 15), it means that it has 5 electrons in its last shell. So an atom in this group is more likely to gain 3 electrons to achieve stability than to lose the 5 electrons it has.

If an atom is in column V (or 15), it will most likely gain 3 electrons to fulfill the octet rule.

A.  Gain 3 electrons

The octet rule defines the property that atoms have to complete their last energy level with eight electrons to achieve stability through an ionic, covalent or metallic bond.

The pair of electrons that are transferred or gained belong to the last shell of the atom. If an atom is in column V (or 15), it means that it has 5 electrons in its last shell. So an atom in this group is more likely to gain 3 electrons to achieve stability than to lose the 5 electrons it has.

Thus, correct option is A.

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Explanation

Ionic solids, such as sodium chloride (NaCl) are composed of positive and negative ions that are held together by electrostatic attractions, which can be quite strong.

Many ionic crystals also have high melting points. This is due to the very strong attraction between the ions.

Although they are hard they also tend to be brittle, and they shatter rather than bend. Ionic solids do not conduct electricity; however, they do conduct when molten or dissolved because their ions are free to move. Many simple compounds formed by the reaction of a metal and a nonmetal element are ionic.

Answer: b. Ionic

Answer:

CuSO₄(aq) + 2 KF(aq) = CuF₂ + K₂SO₄

Explanation:

The question is missing but I think it must be about writing and balancing the equation.

Let's consider the unbalanced equation for the reaction that occurs when aqueous copper (II) sulfate reacts with aqueous potassium fluoride to produce  a precipitate of copper (II) fluoride (I fixed a mistake here) and aqueous potassium sulfate. This is a double displacement reaction.

CuSO₄(aq) + KF(aq) = CuF₂ + K₂SO₄

Since only K and F atoms are not balanced, we will get the balanced equation by multiplying KF by 2.

CuSO₄(aq) + 2 KF(aq) = CuF₂ + K₂SO₄

Answer:

b.  1.9 × 10-3

Explanation:

Answer:1.9x10-3

Explanation:

average

Answer: the hydrosphere

Explanation:

Percentage is a ration of part to a whole. In our case, in perfect conditions, yield is theoretical and thusly considered larger, a whole. While actual yield is less because of imperfect conditions. The percentage is,

\((12.33\cdot 100)/14.5\approx85.03\%\).

Hope this helps.

Answer: 85.03%

Explanation:

Percentage yield = (actual yield/ theoretical yield) x100

so: (12.33/ 14.50)x 100

= 85.0344827586

Explanation:

resistivity is the reciprocal of cell constant

In the carbon dioxide molecule has four shared pairs of electrons, there will be four covalent bonds created, hence option B is correct.

In organic chemistry, covalent bonds are far more prevalent than ionic ones. Two nuclei are simultaneously drawn to one or more pairs of electrons to form a covalent connection. Bonding electrons are those that are present between the two nuclei.

When atoms share electron pairs, covalent bonding results. Atoms create covalent bonds with one another in order to build a complete electron shell, which increases stability.

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Yes it will.

Explanation:

 At cooking temperature the concentration of ethanoic acid may be affected as the solution will boil therefore evaporating the water that will increase the concentration of acid in the solution.

The number of faradays that passes through a resistance in a circuit carrying current of 5 A for 1hour is 0.187 Faraday.

The number of Faradays passing through an electrical circuit can be calculated using the following formula;

Q = It

Where:

According to this question, a circuit of electricity is carrying a current of 5A for 1 hour (3600s). The charge can be calculated as follows:

Q = 5 × 3600

Q = 18,000C

Since [1 F = 96500 C]

18,000C will be equivalent to 0.187 Faradays.

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The amount of nitrogen-13 sample that remained after 60 minutes has been 25mg.

Half-life can be described as the time required by the substance to reduce half of its initial concentration.

The half-life of Nitrogen-13 has been 20 minutes. In 20 minutes, the sample will be reduced to half of its concentration,

The total time has been 60 minutes.

The number of half-life experienced by the sample has:

Number of half life= Total time/half life

Number of half life cycles= 60/20=3

The number of half-life cycles = 3

The sample has been reduced to 50% in the first half-life cycle and reduced to 25% by the end of 2nd half-life cycle.

The sample remained = 25% of the initial concentration.

The sample remained =  25/100.100 mg

The sample remained = 25 mg

Therefore, the amount of nitrogen-13 sample that remained after 60 minutes has been 25mg.

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Explanation:

elements are carbons and hydrogen

Answer:

Carbon and Hydrogen.

Explanation:

It’s in the name Hydro (H) Carbon (C)

The correct option is (d) To express very large or very small number.

What is the Scientific Notation?

Scientific notation is a way to present numbers that are too large or too small to be easily written in decimal form. The three components of  scientific notation are coefficient, base and exponent. The proper format to write a scientific notation is a x 10^b, where a is a number or decimal number and b is the power of 10 to make scientific notation equivalent to original number. When a number between 1 and 10 is multiplied by a power of 10 then the number is expressed in scientific notation. For example,  10000000 can be written as 10⁷, which is the scientific notation and the exponent is positive here. Similarly, for the negative exponent 0.000001 can be can be represented as 10-⁷.                             Hence, the scientific notation is used to express very large or very small numbers.

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The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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Answer:

I thinnk neutron bcoz its is a charge less particle and it's contains less atom so it has less mass

Answer:

From the Online Catalog to the Shelf

Libraries in the United States generally use either the Library of Congress Classification System (LC) or the Dewey Decimal Classification System to organize their books. Most academic libraries use LC, and most public libraries and K-12 school libraries use Dewey.

Explanation:

Answer:

From the Online Catalog to the Shelf

Libraries in the United States generally use either the Library of Congress Classification System (LC) or the Dewey Decimal Classification System to organize their books. Most academic libraries use LC, and most public libraries and K-12 school libraries use Dewey.

Answer:

2.55 minutes = 153 seconds

Explanation: