Which of the following is an example of how the same chemicals used to
help people can harm the environment?
OA. Hillsides erode after plants are removed to clear a space for
O B. Phosphates are removed from detergents so they don't end up in
c. Excess fertilizers run off into rivers and create a dead zone.
OD. Plants grow back after toxic chemicals are removed from the
crops.
drinking water.
surrounding soil

13.83 × 10⁻³ moles of chloride ions, Cl- ion present in 10.2 ml of 0.452 M AlCl₃ solution.

Volume of AlCl₃ solution = 10.2 ml or 0.0102 L

Molarity of AlCl₃ solution = 0.452 M

Number of moles of chloride ions (Cl⁻) = ?

Write the balanced ionic equation

    AlCl₃   →   Al³⁺ + 3Cl⁻

Calculate the number of moles of AlCl₃

    number of moles = molarity / volume L

    number of moles of AlCl₃ = 0.452 M × 0.0102 L

    number of moles of AlCl₃ = 0.00461 mol

From the balanced ionic equation, it is clear that 1 mole of AlCl₃ will produce 3 moles of Cl⁻ ion

So multiply the number of moles of AlCl₃ by 3 to get the number of moles of Cl⁻

    number of moles of Cl⁻ = 0.00461 × 3

    number of moles of Cl⁻ = 0.01383 mol or 13.83 × 10⁻³ moles

You can also learn about ionic equations from the following question:

https://brainly.com/question/15467502

#SPJ4

Answer:

0.305 mol

Explanation:

Ca(NO) is not a molecule. I think you meant to type Ca(NO3)2, which is calcium nitrate.

The moles of a compound is equal to is mass divided by its molar mass.

The molar mass of Ca(NO3)2 is 164.09 g/mol.

50.0 / 164.09 = 0.305

Answer: 8.754831

Explanation:

Answer: 8. 75 kilometers

Explanation:  5.44x 1.609344= 8.7548 Kilometers

Answer:

3. A chemical reaction has occured

A student mixes two liquids together and notices that a white solid has formed at the bottom of the container which means precipitate has formed.

What is precipitation reaction ?

To know more about precipitation check this:

brainly.com/question/18109776

#SPJ2

The pressure developed inside the cylinder is 1678 kPa or 16.78 bar when 454 g of Nitrogen trifluoride compressed gas is contained inside a 2.4 L cylinder at 163 K.

Mass of Nitrogen trifluoride, m = 454 g

                                                    = 0.454 kg

Volume of cylinder, V = 2.4 L

Temperature, T = 163 K

Critical temperature, Tc = 234 K

Molar mass of Nitrogen trifluoride, M = 71 g/mol

                                                             = 0.071 kg/mol

Critical pressure, Pc = 44.6 bar

                                 = 4460 kPa

Saturated vapor pressure, Psat = 3.38 bar

                                                    = 338 kPa

The equation of state for Nitrogen trifluoride is: P = nRT/V

                                                                                  = (m/M)RT/V

Where, P = pressure in kPa

            R = universal gas constant

               = 8.31 J/(mol.K)

T = temperature in Km

  = mass of Nitrogen trifluoride in kgM

  = molar mass of Nitrogen trifluoride in kg/molV

  = volume of the cylinder in L

Substituting the given values, we get:

P = (m/M)RT/V

  = (0.454/0.071) x 8.31 x 163/2.4

  = 1678 kPa.

To learn more on Critical temperature:

https://brainly.com/question/31752157

#SPJ11

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

For more such questions on hydrocarbon visit:

https://brainly.com/question/21281906

#SPJ8

The rate constant for this reaction is –0.29 s–1, which represents the rate of change in concentration of no over time.

To find the rate constant, we can use the equation for the first-order rate law, which is:
Rate = k [A]

Where Rate is the change in concentration of the reactant (in this case NO) over time, k is the rate constant, and [A] is the concentration of the reactant.

We are given the initial concentration of NO (2.8 × 10–3 mol/l) and the concentration after a period of time (2.0 × 10–3 mol/l). We can use this information to calculate the change in concentration:
Δ[A] = [A]final – [A]initial
Δ[A] = (2.0 × 10–3 mol/l) – (2.8 × 10–3 mol/l)
Δ[A] = –0.8 × 10–3 mol/l

Note that the negative sign indicates that the concentration of NO is decreasing over time.
We are also given the time period, s, but we don't need it to solve for the rate constant.

Now we can plug in the values we have into the rate law equation:
Rate = k [A]
Rate = (–0.8 × 10–3 mol/l) / s
k = Rate / [A]
k = (–0.8 × 10–3 mol/l) / (2.8 × 10–3 mol/l)
k = –0.29 s–1

Note that the rate constant is negative, which is expected for a decreasing concentration of a reactant. The units of the rate constant are s–1, which means that the concentration of NO decreases by 0.29 mol/l per second.

To know more about first-order rate law visit:

https://brainly.com/question/13264346

#SPJ11

There are a total of 4 hydrogen atoms on the reactant side of the balanced equation.

On the reactant side of the balanced equation, there are no hydrogen atoms present.

The balanced equation for the reaction between calcium carbide (CaC2) and water is:

CaC2 + 2H2O → C2H2 + Ca(OH)2

In this equation, the reactant side consists of CaC2 and 2H2O. CaC2 does not contain any hydrogen atoms, while 2H2O represents two molecules of water, each containing two hydrogen atoms. Therefore, the total number of hydrogen atoms on the reactant side is 2 (hydrogen atoms in one molecule of water) multiplied by 2 (two molecules of water), which equals 4 hydrogen atoms.

Learn more about hydrogen atoms here:-

https://brainly.com/question/30886690

#SPJ11

Answer:

stay the same.

Explanation:  Period 3 consists of the full 1s, 2s, and 2p electron orbitals, plus the 3s and 3p valence orbitals, which are filled with a total of 8 more electrons as we move from left (Na) to the far right (Ar):

Na:  1s2 2s2 2p6 3s1

Ar:    s2 2s2 2p6 3s2 3p6

As we move from left to right, and ignoring the already-filled 1s, 2s, and 2p orbitals, the period three starting and ending elements have the following:

Na: 3s1

Ar: 3s2, 3p6

All the new electrons electrons filled the third energy level (3s and 3p).  So the energy level does not change, just the orbitals.

In the case the relative strength of the two forces C and D is that D represents a ion-dipole forces, which are known to be very much stronger than the force that is said to be represented by C.

A concept map is known to be a kind of a special type of a web diagram that is often used in the exploration of knowledge and gathering and also in sharing of information.

Note that Concept mapping is a strategy used in creating the idea of a map as it is made up of  a visual depiction of ideas, theories, and others.

Note that inter-molecular forces are known to be those forces that are said to be attractive and also a kind of a repulsive forces that is seen between the molecules of a substance.

Looking at the image attached, In regards to the relative strength of the two forces C and D. The fact is that D stands for ion-dipole forces, which are known to be very much stronger than the force that is said to be represented by C.

To learn more about ion-dipole forces refer to:

brainly.com/question/7462594

#SPJ1

The oxide which is most likely to be acidic in water is option (B) CO₂.

An oxide is a chemical compound that consists of oxygen and other elements.

Oxides are the most common minerals on the planet. Oxides can be divided into acidic, basic, and amphoteric, depending on their acidity or alkalinity in water.

Acidic oxides are oxides that can dissolve in water to create acids.

Basic oxides are oxides that can dissolve in water to create bases.

Amphoteric oxides are oxides that can behave as either acid or base in water.

Carbon dioxide is an acidic oxide, it dissolves in water to form carbonic acid which is acid. carbon dioxide has no hydrogen so it is not an acid itself. but like any non metal oxides CO₂ dissolves in water to give an acidic solution.

CaO, Cs₂O and Li₂O are basic oxides, and Al₂O₃ is an amphoteric oxide.

Therefore, option (b) CO₂ is correct.

To know more about oxides, refer here:

https://brainly.com/question/9496279#

#SPJ11

Moles in the container : 0.306

Given

30 g of H3PO4

Required

moles in container

Solution

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12  

1 mole = 6.02.10²³ particles  

While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule  

MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol

mol = mass : MW

mol = 30 : 98

mol = 0.306

Answer:

Independent variable- nature of irrigation water

Dependent variable- height of the plants

Explanation:

In every study, there must be an independent and a dependent variable. The dependent variable changes its value as the value of the independent variable changes.

When the nature of irrigation water is manipulated, the height of the plant changes accordingly. This implies that the nature of irrigation water (microwaved or tap water) is the independent variable while the height of the plant (the response) is the dependent variable.

The relative rates of diffusion of the gasses is √2 from the calculation.

The rate of diffusion refers to the speed at which particles or molecules spread or disperse through a medium from an area of higher concentration to an area of lower concentration.

We know that from the Graham's law, we have that;

\(R_{1}\)/\(R_{2}\) = √\(M_{2}\)/\(M_{1}\)

\(R_{1}\)= rate of diffusion of Ne

\(R_{2}\)  = rate of diffusion pf carbon dioxide

\(M_{2}\)= molar mass of carbon dioxide

\(M_{1}\) = molar mass of Ne

Then;

\(R_{1}\)/\(R_{2}\) = √44/22

\(R_{1}\)/\(R_{2}\) =  The relative rates of diffusion of the gasses is √2

Learn more about rate of diffusion:https://brainly.com/question/30577268

#SPJ1

Answer: Physical Chemistry

Explanation: The spectrum of an incandescent substance appearing on a spectrogram as one or more bright lines against a dark background.

The bright line spectrum is a physical property of an element because it exhibits the physical appearance of an element.

The formation of a bright line spectrum when a light beam passes through an analyte sample and some of the light is absorbed by the atoms present in the sample which excites the electrons to the higher energy states.

As the excited electron of an atom returns to the ground state, the energy is released in the form of discrete or quantized lines of light. Spectral lines are generated by the transitions of electrons within atoms.

As the electrons move closer or farther from the nucleus of an atom, energy in the form of light is absorbed or emitted. A continuous spectrum has accompanied the light of all wavelengths within a certain range whereas a line spectrum only contains only a few wavelengths.

Therefore, the bright line spectrum is considered a physical property of an element because of the occurrence in the physical appearance of that element.

Learn more about line spectrum, here:

brainly.com/question/14488593

#SPJ5

The order of octahedral splitting energy, ∆o is  \([Co(H_2O)_6]_3^+\) > \([CrCl_6]_3^-\) > \([Cr(CN)_6]_3^-\) > \([Ru(CN)_6]_3^-\).

The octahedral splitting energy (∆o) is defined as the energy difference between the two sets of d-orbitals (t2g and eg) in an octahedral crystal field. This is how the given complexes can be arranged in order of their octahedral splitting energies (from largest to smallest): \([Co(H_2O)_6]_3^+\) : It has the largest ∆o as it is a strong field ligand which causes a large splitting of the d-orbitals. \([CrCl_6]_3^-]\) : It has a lower ∆o than \([Co(H_2O)_6]_3^+\) as chloride ions are weak field ligands and they cause less splitting of the d-orbitals. \([Cr(CN)_6]_3^-\) : It has an even lower ∆o than \([CrCl_6]_3^-\) as cyanide ions are strong field ligands and they cause a greater splitting of the d-orbitals than chloride ions. \([Ru(CN)_6]_3^-\)  has the smallest ∆o as it has weak field ligands and they cause the least splitting of the d-orbitals among the given complexes.

To learn more about octahedral click here https://brainly.com/question/17204989

#SPJ11

The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

Find out more on matter here: https://brainly.com/question/3998772

#SPJ1

Answer:

False

Explanation:

kilo is 1,000

Mili is 1/1,000

The idea of punctuated equilibrium asserts that some evolutionary changes may not even involve intermediate forms.

The idea of punctuated equilibrium is a theory in evolutionary biology that proposes that most evolutionary changes occur relatively rapidly, with long periods of stability punctuated by rare instances of rapid evolutionary change.

The theory was first introduced by Niles Eldredge and Stephen Jay Gould in 1972 as a challenge to the traditional Darwinian theory of gradualism, which posits that evolution proceeds slowly and steadily over long periods of time.

According to punctuated equilibrium, some evolutionary changes may not even involve intermediate forms.

There are several examples of punctuated equilibrium in the fossil record, including the Cambrian explosion, which saw the sudden appearance of most major animal phyla in a relatively short period of time, and the rapid diversification of mammals following the extinction of the dinosaurs at the end of the Cretaceous period.

Learn more about Punctuated equilibrium here:

brainly.com/question/4430933

#SPJ11

Answer:

Hey there! The nuclear symbol for an ion with a charge of +220 protons and 24 neutrons would be written as follows:

220+ 24

The symbol consists of two parts: the atomic number (220+) and the atomic mass (24). The atomic number is the number of protons in the nucleus of an atom, and it is represented by a superscript on the left side of the symbol. The atomic mass is the total number of protons and neutrons in the nucleus, and it is represented by a subscript on the right side of the symbol.

In this case, the atomic number of the ion is 220, which indicates that it has 220 protons in its nucleus. The atomic mass is 24, which indicates that it has a total of 220 protons + 24 neutrons = 244 particles in its nucleus.

________________________________________________________

Nuclear symbols are a way of writing down the important information about atoms and ions in a short and easy-to-read format. They usually consist of two parts: the atomic number and the atomic mass. The atomic number tells us how many protons an atom has in its nucleus, and the atomic mass tells us the total number of protons and neutrons. For example, the nuclear symbol for carbon is 6 12C, which tells us that carbon has 6 protons and 12 particles (6 protons + 6 neutrons) in its nucleus.

To determine the number of protons in an atom or ion, we can look at its atomic number, which is usually written as a superscript on the left side of the nuclear symbol. For example, if the nuclear symbol for an atom or ion is written as 6 12C, we can tell that it has 6 protons. To determine the number of neutrons, we can subtract the atomic number from the atomic mass. For example, if the atomic mass is 12 and the atomic number is 6, then the number of neutrons is 12 - 6 = 6. To determine the number of electrons, we can just look at the overall charge of the atom or ion. If it is neutral, then it will have the same number of protons and electrons. If it is positive or negative, then it will have more or fewer electrons than protons, respectively.

The measure of the other leg is approximately 5.7 cm.

To solve this problem, we can use the Pythagorean Theorem, which states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs. Let x be the length of the other leg of the right triangle. Then we have:

h^2=p^2+b^2
9^2 = 7^2 + x^2
81 = 49 + x^2
x^2 = 32
x ≈ 5.7

Therefore, the measure of the other leg is approximately 5.7 cm. We rounded to the nearest tenth since the problem instructed us to do so.

To know more about Pythagorean Theorem visit:

https://brainly.com/question/14930619

#SPJ11

Yucca Mountain, Nevada is a potentially viable site for nuclear waste disposal because it is an arid desert with very less precipitation and minimal contamination due to the nuclear waste.

Yucca Mountain, Nevada is a wide stretch of 160 km of dry desert with very little rainfall.  This area is mainly composed of dense volcanic rock which contains minute pores which make the process of rainwater infiltration very slow and restricting.

Also, the nuclear waste will be stored in such a way that it is far above the water bodies of the mountain. This way the threat of water contamination is also out of question.

These all factors would effectively protect the waste and prevent the leak of harmful radioactive radiation from the disposal storage.

That being the case, Yucca Mountain, Nevada is a potentially viable site for nuclear waste disposal.

LEARN MORE ABOUT NUCLEAR WASTE HERE: https://brainly.com/question/4449362

#SPJ4  

Answer:

26.981539 u

Explanation:

One mole of Al atoms has a mass in grams that is numerically equivalent to the atomic mass of aluminum. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

Answer:

2.68573957

Explanation:

The partial and total pressures are:

a. The partial pressure of hydrogen gas in the final state is calculated by dividing the initial pressure of hydrogen gas by the final volume of the system.

The initial pressure of hydrogen gas is 550 torr and the final volume of the system is 6.00 L.

Therefore, the partial pressure of hydrogen gas in the final state is:

Partial Pressure of H₂ = 550 torr / 6.00 L = 91.67 torr

b. The partial pressure of nitrogen gas in the final state is calculated by dividing the initial pressure of nitrogen gas by the final volume of the system.

The initial pressure of nitrogen gas is 350 torr and the final volume of the system is 6.00 L.

Therefore, the partial pressure of nitrogen gas in the final state is:

Partial Pressure of N₂ = 350 torr / 6.00 L = 58.33 torr

c. The total pressure of the system is the sum of the partial pressures of the individual gases. In this case, the total pressure is the sum of the partial pressure of hydrogen gas and the partial pressure of nitrogen gas. Therefore, the total pressure is:

Total Pressure = 91.67 torr + 58.33 torr = 150 torr

Find out more on pressure here: https://brainly.com/question/19813237

#SPJ1

The expected reaction is "no reaction." Iron (Fe) and Potassium Arsenide (K₃As) do not react to form the listed products, option D.

The reactants in a chemical reaction are the starting materials that undergo a transformation to form new substances, which are known as products. They play a crucial role in determining the outcome of the reaction, as the type and amount of reactants can affect the speed, yield, and type of products formed.

In a chemical reaction, the reactants react with one another, breaking and forming bonds, to create new chemical species. The change in reactants results in the formation of different products, which in turn can go on to participate in further reactions. "No reaction" is the expected response. The listed products are not formed by the reactions of iron (Fe) and potassium arsenide (K₃As).

Learn more on reactants here: https://brainly.com/question/26283409

#SPJ1

Given the set of reactants, the most likely outcome would be that there is no reaction.

Considering the reaction: \(Fe + K_3As\)

Fe cannot displace K in solution because potassium is higher on the reactivity series than Fe.

In the same vein, Fe cannot react with K. In other words, Fe can neither displace K from the solution nor can it react with K. Hence, no reaction can occur as far as the equation is concerned.

More of the feasibility of chemical reactions can be found here: https://brainly.com/question/27819793

#SPJ1

Answer:

we need to see the diagram

Explanation:

CH4 is the compound with the lowest boiling point.

Helium has the lowest melting temperature of all chemical elements, and carbon has the greatest melting point.

With a reduction in molecule size, the strength of the London dispersion forces also reduces Therefore, in this situation, the molecule with the fewest branches and shortest length has the smallest boiling point.

To know more about boiling point visit:

brainly.com/question/2153588

#SPJ1

The complete question is -

Which one of the following compounds will have the lowest boiling point?  (a) NH3 (b) C2H6 (c) CH3 (d) H2O

Answer: Corrosion is caused by a completely expected chemical reaction due to hydrogen gas building pressure and ultimately needing to escape from inside a battery.

Use white vinegar or lemon juice: Most household batteries contain bases, so acids will neutralize their discharge. Rubbing alcohol: Isopropyl alcohol is a safe and effective way to clean electronics without leaving behind moisture and other residue.

Hope this helps with your questions! :D

Answer:

Q = 319.49 J

Explanation:

Given that,

Mass, m = 16.6 g

Initial temperature, \(T_i=40.2^{\circ} C\)

We need to find the heat needed to warm the water to 44.8 °C. The formula that is used to find the heat required is given by :

\(Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q=16.6\ g\times 4.184\ J/g^{\circ} C\times (44.8-40.2)^{\circ} C\\\\Q=319.49\ J\)

So, 319.49 J of heat is needed to warm water.