Ite
a city is considering different water purification methods for the water supply. which fact would help inform the city if cost was
a significant constraint? (1 point)
iter
reverse osmosis systems are more expensive because of the chlorine treatments
iten
olon exchange systems are more expensive because of the chlorine treatments
iten
o reverse osmosis systems are more expensive because of the use of filters that need replacement
iten
olon exchange systems are more expensive because of the use of filters that need replacement
item
iten

The Number of moles present is 0.5mol.

What is ideal gas law?

The general gas equation, also known as the ideal gas law, is the equation of state for a fictitious ideal gas. The equation for the ideal gas's relationship to pressure P, volume V, temperature T, and number of moles n is known as the ideal gas law.

Use P V = n R T 

R = 0.08206 L -atm /mol -K when the pressure is in atmosphere atm, the volume is in litres L, and the temperature is in Kelvin K.

One atm is equal to 760.0 mm Hg, so depending on how the pressure changes, there will either be a division or multiplication.

Divide the value in mmHg by 760.0 mmHg/atm to convert it to atm.

P= 912mmHg /760mmHg/atm=1.2atm

to convert °C to kelvin,

  K=°C +273= 20+273=293K

R=0.08206

Add these values to given equation,

n=PV/RT

 = 1.2×10÷0.08206×293

 = 12÷24.02

 =0.5mol

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The heat of reaction (ΔH) can be represented by the difference in potential energy between the reactants' energy level and the products' energy level. The catalyst provides an alternative mechanism that has a lower activation energy, allowing the reaction to proceed faster.

a) Here is a sketch of a potential energy diagram for the reaction:

Potential Energy

            Reactants

        _____________________________

             Transition State  

                  (Activated      

                    Complex)        

        _____________________________

                    Products        

        _____________________________

        _____________________________

                    Reaction Progress

b) The numerical values of the forward activation energy and the enthalpy change can be indicated on the diagram. Typically, the vertical axis represents potential energy, and the horizontal axis represents the reaction progress. The forward activation energy (E(a)) can be shown as a vertical line on the diagram, starting from the reactants' energy level and extending to the transition state's energy level. The heat of reaction (ΔH) can be represented by the difference in potential energy between the reactants' energy level and the products' energy level.

c) The effect of a catalyst can be shown by adding an alternative reaction pathway on the exothermic reaction potential energy diagram. The catalyst provides an alternative mechanism that has a lower activation energy, allowing the reaction to proceed faster. This alternative pathway would have a lower activation energy compared to the uncatalyzed reaction. The catalyst can be indicated by a separate curve or line on the diagram, connecting the same reactants and products but with a lower activation energy.

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Answer:

body temperature and energy

The volume of dry hydrogen gas at standard atmospheric pressure (which is typically defined as 1 atm or 101.325 kPa) depends on the number of moles of hydrogen gas present. The ideal gas law, PV = nRT, relates the pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas. Assuming standard temperature and pressure (0°C and 1 atm), one mole of any ideal gas occupies a volume of 22.4 L. Therefore, to find the volume of dry hydrogen gas at standard atmospheric pressure, we need to know how many moles of hydrogen gas we have.

For example, if we have 1 mole of dry hydrogen gas at standard atmospheric pressure, the volume would be 22.4 L. If we have 0.5 moles of dry hydrogen gas, the volume would be 11.2 L. And so on.

Answer:

Chemical change.

Hope this helps you.

Answer:

mars

6779 ( diameter km )

53% of the size of the earth

venus

12104 ( diameter km)

95% of the size of the earth

neptune

49528 (diameter km)

388% of the earth size

jupiter  10 times larger than earth

Explanation:

Normal Concentration = 18.09 moles/L Standard Deviation = 1.89 moles/L

The capacity for sustained attention on a single thing, activity, or work without being sidetracked is known as concentration. It is the key to success in most endeavors, as it requires a person to ignore any extraneous thoughts, feelings, or stimuli and instead focus on the task at hand. Concentration is a mental skill that can be developed and improved with practice, such as with mindfulness, meditation, and various cognitive exercises. Concentration can also be adversely affected by poor physical health, lack of sleep, and stress, so it is important to maintain a healthy lifestyle if one wants to stay focused.
Student | Weight (g) | Volume (L) | Concentration (moles/L)
1 | 5.0 | 0.25 | 19.82
2 | 8.0 | 0.50 | 15.89
3 | 4.0 | 0.20 | 20.23
4 | 7.0 | 0.30 | 18.52
5 | 6.0 | 0.40 | 16.96

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Answer:

Class M

Explanation:

Lead Air toxics is not a criteria pollutant.

Criteria air pollutants are those for which it is possible to define tolerable exposure levels and for which an ambient air quality standard has been established. Ozone, carbon monoxide, nitrogen dioxide, and sulfur dioxide are among examples.

The cardiovascular system, nervous system, kidney function, immune system, and reproductive and developmental systems can all suffer harm from lead exposure. Lead exposure also affects the blood's capacity to carry oxygen.

Lead poisoning can weaken you, damage your kidneys and brain, and cause anemia. High levels of lead exposure can be fatal. Because lead can pass through the placental barrier, pregnant women who are exposed to it also put their unborn child at risk. The growing neurological system of a baby can be harmed by lead.

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Species which has the largest dipole moment is CH3Cl.

Dipole moment can be defined as the product of the distance between the centers of positive and negative charge and the magnitude of the charge. It is denoted by μ.

The trend of dipole moment in case of yhe halogens areas below:

The dipole moment of species CH3Cl is greater than CH3F due to the electron affinity.

Thus, we concluded that species which has the largest dipole moment is CH3Cl.

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Answer:

Limiting reactant: lead(II) nitrate (Pb(NO3)2).

Mass of sodium nitrate (NaNO3) = 12.92 g.

Explanation:

What is given?

Mass of lead (II) nitrate (Pb(NO3)2) = 25 g.

Mass of sodium iodide (NaI) = 30 g.

Molar mass of Pb(NO3)2 = 331 g/mol.

Molar mass of NaI = 150 g/mol.

Molar mass of sodium nitrate (NaNO3) = 85 g/mol.

Step-by-step solution:

First, let's state the balanced chemical equation. Lead (II) nitrate (Pb(NO3)2) reacts with sodium iodide (NaI) in a double-replacement reaction to produce sodium nitrate (NaNO3), and PbI2:

Now, let's calculate the number of moles of each reactant using its molar mass. The conversion from grams to moles for Pb(NO3)2 will look like this:

And for NaI:

The next step is to see how many moles of NaNO3 are being produced. We're going to need the chemical equation: let's start with Pb(NO3)2. 1 mol of Pb(NO3)2 reacted produces 2 moles of NaNO3, so we will obtain:

And now, let's see that 2 moles of NaI reacted produce 2 moles of NaNO3, so the molar ratio between these compounds is 1:1, which means that 0.20 moles of NaI reacted will produce 0.20 moles of NaNO3 too:

Based on these calculations, you can note that the limiting reactant would be Pb(NO3)2 because this compound imposes the limit because is being consumed first, it is producing the maximum amount of NaNO3 that we can produce in this reaction.

The final step is to calculate the mass of NaNO3 that is being produced. Remember as Pb(NO3)2 is the limiting reactant and it produces 0.152 moles of NaNO3, we use this data to find the mass of NaNO3 using its given molar mass too, like this:

The answer is that the limiting reactant is lead (II) nitrate (Pb(NO3)2) and we're producing 12.92 g of sodium nitrate (NaNO3).

Answer: A. The greater the pressure, the more of gas that will dissolve.

Explanation: Increasing pressure increases the solubility of gases. It has little effect on the solubility of liquids and solids.

The average concentration of wastewater is 168 kg/m³.

The consumption of solvent per day = 100 kg/30 days

The consumption of solvent per day = 10/3 kg/day

Amount lost = 10/3×15/100

Amount lost = 0.5

Remaining amount of solvent = 3.3 - 0.5

Remaining amount of solvent = 2.8 kg/day

Recovered amount = 2.8×40/100

Recovered amount = 1.12 kg/day

Remaining amount of solvent = 2.8 - 1.12

Remaining amount of solvent = 1.68 kg/day

So, 1.68kg/day is received by wastewater. As 1 kg is 1000 gram. Thus, 1.68 kg is 1680 grams Concentration in wastewater = 1680/10

Concentration in wastewater = 168 kg/m³

Hence, the concentration in wastewater is 168 kg/m³.

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2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

To illustrate the conversion between the two resonance structures, I'll provide a step-by-step explanation and draw the missing curved arrows for clarity. Let's assume we have a molecule with a conjugated system, and we want to convert the first resonance structure into the second one.

In the first resonance structure, we might have a double bond adjacent to a lone pair or an atom with an available p orbital. To convert it into the second resonance structure, we need to move the pi bond to a different position, allowing the electron density to shift. This movement of electrons is represented by curved arrows.

Here's the step-by-step process:

1. Identify the double bond and the atom or group with the available p orbital.

2. Begin by drawing a curved arrow from the pi bond towards the atom or group with the available p orbital. This arrow represents the movement of electrons from the pi bond to the atom or group.

3. Simultaneously, draw a curved arrow from the atom or group with the available p orbital towards the carbon atom that is adjacent to the double bond. This arrow represents the movement of electrons from the atom or group to the carbon atom.

4. Adjust the position of the double bond to the carbon atom that just received the electrons, and make sure to retain the correct number of lone pairs and formal charges.

5. The resulting structure should have a new double bond and a different arrangement of electrons, providing the second resonance structure.

Remember, resonance structures are hypothetical representations that show the distribution of electrons within a molecule. They contribute to the overall stability of the molecule by delocalizing electron density.

It's important to note that without specific details about the starting molecule or the atoms involved, it's challenging to provide an accurate and detailed example. However, this general procedure should guide you in drawing the missing curved arrows to convert between resonance structures in a conjugated system.

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Answer:

5 mL

Explanation:

When an object is completely submerged in a liquid , it displaces liquid equal to its volume . Therefore level of liquid is raised in a container containing liquid .

When the irregularly shaped object is totally submerged the volume of water in a graduated cylinder increases from 10 mL to 15 mL.

Initially volume of water contained = 10 mL

volume of water + volume of irregular shaped object = 15 mL

volume of irregular shaped object = 15 - 10 = 5 mL .

An allylic carbocation is an example of a system that is:

An allylic carbocation is a resonance-stabilized carbocation with a formal charge of +1 on an allylic carbon in each of the two resonance forms.

Thus, it is correct to state that:

An allylic carbocation is an example of a system that is:

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Full Question:

An allylic carbocation is an example of a(n) _______ system. (Select all that apply.)

- localized

- isolated

- delocalized

- conjugated

Answer:

89.86 g/mol

i hope it help:^

♡♡

The Ring of Fire also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth's volcanoes and earthquakes take place along the Ring of Fire.

Volcanoes are associated with the belt throughout its length; for this reason, it is called the “Ring of Fire.” A series of deep ocean troughs frame the belt on the oceanic side, and continental landmasses lie behind. The Ring of Fire was formed as oceanic plates slid under continental plates. Volcanoes along the Ring of Fire are formed when one plate is shoved under another into the mantle – a solid body of rock between the Earth's crust and the molten iron core – through a process called subduction. The Ring of Fire is a string of volcanoes and sites of seismic activity, or earthquakes, around the edges of the Pacific Ocean. Roughly 90% of all earthquakes occur along the Ring of Fire, and the ring is dotted with 75% of all active volcanoes on Earth.

The numbering system simply reflects the order of their discovery and does not imply a systematic progression or specific functional differences between them.

KV1 Channels: KV1 channels, also known as Shaker-related channels, are one of the earliest identified subtypes of potassium channels. They play a crucial role in regulating neuronal excitability. They are widely expressed in various tissues, including the nervous system, heart, and skeletal muscle.

KV2 Channels: KV2 channels are another subtype of potassium channels found in neurons. They exhibit distinct biophysical properties compared to KV1 channels. KV2 channels are involved in regulating neuronal firing patterns and neurotransmitter release.

KV3 Channels: KV3 channels, also known as Shaw-related channels, are a group of high-threshold, fast-activating/deactivating potassium channels. They are predominantly expressed in neurons, especially in regions involved in the generation of high-frequency action potentials, such as auditory neurons and certain types of interneurons.

KV4 Channels: KV4 channels belong to the A-type potassium channel family. They are characterized by their rapid activation and inactivation kinetics. KV4 channels are widely expressed in the brain, heart, and other tissues. In the brain, they are involved in regulating neuronal excitability and synaptic transmission.

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Answer:

B

Explanation:

it flows by the conduction currents

Answer:

particles in liquids have greater kinetic energy than particles in solids

Answer:

i think answer is a, every 30 days

Answer:

Once every 28 days

Explanation:

I am not 100% sure because i am not female but i do remember that in my health class it said it was once every 28 days

The easiest type of particle to be entrained by wind is dust. When it comes to wind erosion, different types of particles can be lifted and carried away by the wind. However, the easiest type of particle to be entrained by wind is dust. This is because dust particles are generally smaller and lighter than other types of particles, such as sand or gravel.

Dust particles typically range in size from 0.1 to 0.5 micrometers, which makes them more susceptible to being picked up and carried away by wind. Dust particles are also often found in areas with dry and loose soil, which makes it easier for the wind to dislodge them from the ground. These particles can then be transported over long distances, depending on the strength of the wind and the terrain features. Dust storms, for example, can result from the entrainment of large amounts of dust particles by strong winds. Overall, dust particles are the easiest type of particle to be entrained by wind due to their size and weight, as well as their tendency to accumulate in loose soil.

Fine sand or dust particles are the easiest to be entrained by wind because of their small size and light weight, which allows the wind to easily pick them up and transport them over varying distances. Wind entrainment is the process of picking up and moving particles, such as soil, sand, and dust, from one location to another. The ability of wind to entrain particles depends on the size, weight, and surface characteristics of the particles. Fine sand or dust particles have a smaller size and lighter weight compared to larger particles, such as gravel or pebbles. As a result, it requires less wind energy to pick up and transport these fine particles, making them the easiest type to be entrained by wind.

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Answer:

Hydrogen and oxygen

Explanation:

This is the most common compound water

The reaction is given by

Answer:

Hydrogen and helium is the answer

Lets find

\(\\ \sf\longmapsto NH_4OH\)

\(\\ \sf\longmapsto 14u+4(1u)+16u+1u\)

\(\\ \sf\longmapsto 14u+4u+17u\)

\(\\ \sf\longmapsto 18u+17u\)

\(\\ \sf\longmapsto 35u\)

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 62 mL

density = 1.02 g/mL

The mass is

mass = 1.02 × 62

We have the final answer as

Hope this helps you