Which of the following is a problem caused by acid rain?
1 -is a factor in global warming
2-causes depletion of the ozone layer
3-respiratory problems in humans
4-makes lakes and streams unsuitable aquatic life

Those who live on the East Coast of the United States may be affected by environmental change due to rising sea levels and temperatures.

Extreme precipitation events, sea level rise, coastal and riverine flooding, and heat waves are just a few of the effects of climate change that will challenge the Northeast's environmental, social, and economic systems and make its residents, particularly its most vulnerable populations, more vulnerable.

By affecting the quality of the air and water, spreading some diseases more widely, and changing the frequency or severity of extreme weather events, climate change can also have an effect on human health. Coastal habitats and communities are in danger due to rising sea levels.

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The amount of heat needed to raise the temperature of 355 g of ethanol by 63°C is 53,568 joules (J).

To calculate the amount of heat required to raise the temperature of a substance, we can use the formula:

q = m × c × ΔT

Where:

q = heat energy (in joules)

m = mass of the substance (in grams)

c = specific heat capacity of the substance (in J/g°C)

ΔT = change in temperature (in °C)

Given:

Mass of ethanol (m) = 355 g

Specific heat capacity of ethanol (c) = 2.4 J/g°C

Change in temperature (ΔT) = 63°C

Using the formula, we can calculate the heat energy (q):

q = 355 g × 2.4 J/g°C × 63°C

q = 53568 J

Therefore, the amount of heat needed to raise the temperature of 355 g of ethanol by 63°C is 53,568 joules (J).

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111900g  is the weight of an object that has the area of 74.6 m² and exerts a pressure of 1500 N/m².

Weight being a force The SI unit for weight is Newton (N), which also happens to be the same as the SI unit for force. When we look at how weight is expressed, we can see how it depends on both mass as well as the acceleration caused by gravity; while the mass might not vary from one location to another, the acceleration caused by gravity does.

Pressure = thrust/ area

              = weight/ area

1500  = weight/ 74.6

weight = 111900g

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Answer:

3.84 Ω

Explanation:

From the question given above, the following data were obtained:

Electrical power (P) = 150 W

Voltage (V) = 24 V

Resistance (R) =?

P = IV

Recall:

V = IR

Divide both side by R

I = V/R

P = V/R × V

P = V² / R

Where:

P => Electrical power

V => Voltage

I => Current

R => Resistance

With the above formula (i.e P = V²/R), we can calculate resistance as illustrated below:

Electrical power (P) = 150 W

Voltage (V) = 24 V

Resistance (R) =?

P = V²/R

150 = 24² / R

150 = 576 / R

Cross multiply

150 × R = 576

Divide both side by 150

R = 576 / 150

R = 3.84 Ω

Thus, the resistance is 3.84 Ω

Answer : 12.9 moles are formed when 4.30 moles of C3H8 reacts with the required 21.5 moles of O2.

To calculate the moles of CO2 formed when 4.30 moles of C3H8 reacts with the required 21.5 moles of O2, we need to know the balanced chemical equation for the reaction.

C3H8 + 5O2 → 3CO2 + 4H2O

From the balanced chemical equation, we can see that 1 mole of propane reacts with 5 moles of oxygen to produce 3 moles of CO2. Therefore, for 4.30 moles of C3H8 reacting with 21.5 moles of O2, the limiting reactant is C3H8 because the mole ratio of C3H8 to O2 is 1:5.

Hence, the number of moles of CO2 formed is given by the mole ratio of CO2 to C3H8, which is 3:1.Thus, moles of CO2 formed = 4.30 × 3/1 = 12.9 moles.

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the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

To calculate the change in Gibbs energy, we can use the equation:

ΔG = ΔH - TΔS

ΔH - change in enthalpy,

ΔS - change in entropy,

T - temperature in Kelvin.

at 188 K, ΔH = 2380 J/mol and ΔS = 12.6 J/mol K

ΔG = (2380 J/mol) - (188 K)(12.6 J/mol K)

ΔG = 2380 J/mol - 2374.8 J/mol

ΔG = 5.2 J/mol

The positive value of ΔG indicates that the reactants are more stable than the products and that energy must be added to the system to drive the reaction forward.

Therefore, the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

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The reaction has a heat of 161.1 kJ/mol.

If 250 mL of a NaOH solution contain 1 milligrams of NaOH, the solution's molarity is 10-4 M. The amount of solute in 1 litre of solution is known as the molarity.

We can use the following formula to get the reaction's heat:

Q = m × c × ΔT

The total volume of the mixture is 500.0 mL because we are aware that the volume of each solution is 250.0 mL:

m = V × ρ

m = 500.0 mL × 1.025 g/mL

m = 512.5 g

The change in temperature must then be calculated:

ΔT = (48.8°C - 2.0°C) = 46.8°C

Assuming that the acid used is HCl and the base used is NaOH, their molar masses are:

HCl: 1 mol of HCl = 36.46 g/mol

NaOH: 1 mol of NaOH = 40.00 g/mol

The reaction between HCl and NaOH has the following chemical formula:

HCl + NaOH → NaCl + H2O

As can be seen, the reaction's stoichiometry is 1:1, which means that 1 mole of HCl combines with 1 mole of NaOH.

So, the following formula can be used to determine the reaction's heat:

Q = m × c × ΔT

Q = 512.5 g × 4.190 J/goC × 46.8°C

Q = 100,697 J or 100.697 kJ

Since both solutions have a 2.500 M molarity, the number of moles of either HCl or NaOH can be determined as follows:

moles = M × V

moles = 2.500 mol/L × 0.2500 L

moles = 0.6250 mol

Therefore, the heat of the reaction is:

Q/mol = Q / moles

Q/mol = 100.697 kJ / 0.6250 mol

Q/mol = 161.1 kJ/mol

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Answer:

(1/2)(1.62) t^2 = 1.4

That will give you the time, t

Explanation:

hope this helps(✿◡‿◡)

Option (b) is correct. If 31.6 mL of sodium bicarbonate reacts with excess hydrochloric acid then 0.0632 moles of carbon dioxide formed. This is calculated by using the concept of balanced chemical equation.

The balanced chemical equation for the reaction between sodium bicarbonate and hydrochloric acid can be written as,

Na H CO₃ + H Cl → CO₂ + H₂O + Na Cl

here we can see that 1 mole of sodium bicarbonate produces 1 mole of CO₂.

We have to determine the number of moles of sodium bicarbonate to calculate the number of mole used in the reaction. here concentration and volume of the sodium bicarbonate solution can be used.

The Molarity of sodium bicarbonate solution is 2.0 M.

The Volume of sodium bicarbonate solution used is 31.6 mL = 0.0316 L.

Number of moles of sodium bicarbonate = Molarity x Volume

                                                                    = 2.0 M x 0.0316 L

                                                                    = 0.0632 moles

From the balanced chemical equation we get 1 mole of sodium bicarbonate produces 1 mole of CO₂, So, the number of moles of CO₂ produced in the reaction is  0.0632 moles.

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The correct question is,

When 2.0 M aqueous solutions of sodium bicarbonate and hydrochloric acid react, it produces carbon dioxide, water and sodium chloride. Calculate the number of moles of carbon dioxide formed if 31.6 mL of sodium bicarbonate reacts with excess hydrochloric acid.

A. 15.8 moles CO2

B. 00632 moles CO2

C. 324 moles CO2

D. 0.064 moles CO2

The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Answer:

5.004

Explanation:

............

............

.my Rude g ubddvbrbrbr

sorry in a hurry

Answer: 0.6

Explanation:Yes

Therefore, the volume of the balloon when heated to 88°C is 2.432 L.

In the case of a gas, the volume is the amount of space that the gas occupies in a container. The volume of a gas can be affected by changes in pressure and temperature, as described by the ideal gas law. In this case, the volume is often expressed in terms of standard temperature and pressure (STP), which are defined as a temperature of 0°C and a pressure of 1 atmosphere (atm). In chemistry, volume is an important property for understanding the behavior of substances in chemical reactions. The volume of reactants and products can be used to determine the stoichiometry of a reaction, which is the relationship between the amounts of reactants and products in a chemical equation.

Here,

To solve this problem, we can use the ideal gas law, which states that:

PV = nRT

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

Since the pressure of the gas is assumed to remain constant, we can rearrange the ideal gas law to solve for V:

V1/T1 = V2/T2

where V1 is the initial volume of the balloon, T1 is the initial temperature in Kelvin (24°C = 297 K), V2 is the final volume we want to find, and T2 is the final temperature in Kelvin (88°C = 361 K).

Using this equation, we can plug in the given values and solve for V2:

V1/T1 = V2/T2

2.00 L / 297 K = V2 / 361 K

Multiplying both sides by 361 K, we get:

V2 = 2.00 L x (361 K / 297 K)

V2 = 2.00 L x 1.2162

V2 = 2.432 L

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Answer:

C)Equations were used to identify regions around the nucleus where electrons would likely be.

Explanation:

edgenuity 2020

Answer:

Equations were used to identify regions around the nucleus where electrons would likely be.....(C).....

Explanation:

hope this helps. the person above me is correct, the comments were looking for a different question

Answer:

Metals react by losing electrons.  So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction.

Explanation:

Metals react by losing electrons. So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction. Also, electrons lost by metals transfer to the nonmetals. It is easier for the metals to lose their valance electrons and form cations rather than gaining electrons.

Metals do not hold on to or attract electrons while nonmetals hold on to or attract electrons.

In the periodic table, metals are found towards the left hand side of the table while nonmetals are found towards the right hand side of the table.

Electron affinity of elements increase from left to right across the period. Electron affinity refers to the ability of elements to attract or hold electrons. This ability increase steadily across the period.

Usually, the electron affinity values of nonmetals are very high showing that they easily hold on to and attract electrons while the electron affinity values of metals is very low showing that they do not easily hold on to and attract electrons.

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The product would form in the grignard reaction of phenylmagnesium bromide with carbon dioxide:

\(C_6H_5MgBr\) + \(CO_2\) → \(C_6H_5COOMgBr\) (carboxylate intermediate)

\(C_6H_5COOMgBr\) + \(H_2O\) → \(C_6H_5COOH\) + \(MgBrOH\) (final product)

The reaction of phenylmagnesium bromide (\(C_6H_5MgBr\)) with carbon dioxide (\(CO_2\)) forms benzoic acid (\(C_6H_5COOH\)). The reaction mechanism involves the nucleophilic addition of the carbanion formed by the Grignard reagent to the electrophilic carbon of carbon dioxide to form a carboxylate intermediate. The intermediate is then protonated by water to form the final product, benzoic acid. The reaction can be represented as:

\(C_6H_5MgBr\) + \(CO_2\) → \(C_6H_5COOMgBr\) (carboxylate intermediate)

\(C_6H_5COOMgBr\) + \(H_2O\) → \(C_6H_5COOH\) + \(MgBrOH\) (final product)

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Based on the given information, we know that the compound has a molar mass of 152 g/mol and contains both an aromatic alcohol and an ester functional group.

Looking at the proton NMR spectrum, we can see that there are three distinct peaks: a singlet at δ 3.95, a multiplet from δ 6.41-8.30, and a triplet at δ 10.75. The singlet at δ 3.95 with an integration value of 3.00 au suggests that there are three protons in the same environment, likely attached to an -OH group.

The multiplet from δ 6.41-8.30 with an integration value of 4.00 au indicates that there are four protons in the same environment, likely attached to an aromatic ring. The splitting pattern of the multiplet is not clear from the given information, but we can assume that it is a complex splitting pattern due to the presence of neighboring protons on the ring.

The triplet at δ 10.75 with an integration value of 0.98 au suggests that there is one proton in the same environment, likely attached to an ester group. The triplet splitting pattern indicates that the proton is split by two neighboring protons with a coupling constant (J) of approximately 7 Hz.

Putting all of this information together, we can propose a structure for the unknown compound:

      H
      |
H - C - O - C - CH3
      |
     OH
      |
    Ar-H

The singlet at δ 3.95 corresponds to the three protons on the -OH group, the multiplet from δ 6.41-8.30 corresponds to the four protons on the aromatic ring, and the triplet at δ 10.75 corresponds to the one proton on the ester group. The molar mass of this compound is 152 g/mol, which matches the given information.

Therefore, the unknown compound is likely an aromatic alcohol ester with the proposed structure shown above. The integrated values and splitting pattern support this structure.

Based on the given information, the unknown compound contains an aromatic alcohol and an ester functional group, and has a molar mass of 152 g/mol.

The NMR data provided are:
δ 3.95, s, 3.00 au (aromatic alcohol -OH proton)
δ 6.41-8.30, m, 4.00 au (aromatic ring protons)
δ 10.75, t, 0.98 au (ester -COOCH3 proton)

The aromatic alcohol functional group suggests a phenol derivative, and the ester functional group indicates a -COOCH3 group. The molar mass of 152 g/mol further supports a phenol derivative with an additional ester group.

Taking all these pieces of information into account, the unknown compound is most likely to be methyl 4-hydroxybenzoate (also known as methyl paraben). Its molecular formula is C8H8O3, and its molar mass is 152 g/mol, fitting the given data.

In methyl 4-hydroxybenzoate, the aromatic ring has four protons, which account for the δ 6.41-8.30, m, 4.00 au peak. The -OH proton in the phenol group is represented by the δ 3.95, s, 3.00 au peak, while the -COOCH3 proton is represented by the δ 10.75, t, 0.98 au peak. These integrated values and splitting patterns support the identification of the compound as methyl 4-hydroxybenzoate.

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Answer:

\(S_{2}\)\(F_{3\\}\), the empical formula

Explanation:

Let's assume we have  100 grams of the compound:

The 100 grams will consist of:

25.24 grams of S

74.76 grams of F

100.0 grams

We need to find the numbers of atoms in each of these masses.  Divide each by that element's molar mass to find atoms of each:

Sulfur:      (25.24 g)/(32 g/mole S) = 0.789 moles S

Flourine:  (74.76 g)/(19.0 g/mole F) = 5.93 moles F

There are 0.8 atom of S for every 6 atoms of F

We can;t have 0.8 atom of anything, so let's multiply it by a factor to make it a whole number.  5 is the best I can find.  Both need to be increased by the same factor:

That makes 4 atoms of S and 30 atoms of fluorine.

\(S_{4}\)\(F_{6\\}\)

We can reduce that to \(S_{2}\)\(F_{3\\}\), the empical formula

Answer:

A

Explanation:

As you add a bulky group to the end of a carbon chain the boiling point goes up on the molecule.

Answer:

The answer is below

Explanation:

1. Fractional Distillation

2. Simple Distillation

3. Filtration

4. Steam distillation or lemon grass oil extraction

Answer:

Its when like two pure substances are like combined into one.

Explanation:

Answer:  2.36 grams

Explanation:   One molecule of NaCl has an atomic mass of 58.4 amu.  That consists of one atom each of sodium (23 amu) and chlorine (35.4 amu).

Na  23                     (23/58.4)    = 0.3934

Cl   35.4                  (35.4/58.4) = 0.6066

      58.4 amu

For Na:  (6 grams)*(0.3934) = 2.36 grams

The correct answer is 0.15.

We are aware that there is 0.05 mol of an unidentified hydrocarbon we will refer to as "X" and that its burning produces 6.6 g of carbon dioxide and 3.6 g of water.

These quantities might be converted to moles by applying the following formula:

amount= mass/ relative atomic mass

Thus, the following equation may be written for H2O: moles = 3.6 / 18 = 0.2 and for CO2: moles = 6.6 / 44 = 0.15.

0.05X + x'O2 = 0.15CO2 + 0.2H2O

This may be made simpler by dividing through by 0.05 (this step is likely to be the most helpful to you), resulting in:

1 x + x O2 = 3 co2 + 4 H2O

The hydrocarbon must have been the source of all the carbon in the carbon dioxide and all the hydrogen in the water.

Accordingly, 4 x 2 = 8 moles of H and 3 x 1 = 3 moles of C.

There are 3/1 = 3 Cs and 8/1 = 8 Hs in one X molecule.

This clearly identifies C3H8 or propane as the hydrocarbon X (dividing by 1 seems unnecessary, but it illustrates the process to use if there were more than one mol of X in the first equation).

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The illustration of Thomson's atom represents a neutral atom. In this case, the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

A neutral atom is an atom that has no electrical charge. An atom is neutral because it has the same amount of positively charged protons and negatively charged electrons. The nucleus of an atom contains protons, which are positively charged particles. Electrons, which are negatively charged particles, are located in the atom's electron cloud around the nucleus.

Electrons, protons, and neutrons are the three components of atoms. Electrons are negatively charged, protons are positively charged, and neutrons have no charge. Electrons are found outside the nucleus of the atom and are continually moving at high speeds.

In summary, if the illustration of Thomson's atom represents a neutral atom, then the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

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The purpose of adding base in the aldol condensation reaction is c) Deprotonate α-carbon to generate electrophile.

What is aldol condensation?

Aldol condensation is a reaction in organic chemistry that involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form a β-hydroxy carbonyl compound.

In the aldol condensation reaction, a base is added to deprotonate the α-carbon of the carbonyl compound, typically an aldehyde or a ketone. The deprotonation of the α-carbon generates an enolate ion, which is an excellent nucleophile. This deprotonation step is crucial in generating the reactive electrophile necessary for the aldol condensation reaction.

By deprotonating the α-carbon, the base increases the electron density on the carbon atom, making it more nucleophilic and prone to react with another carbonyl compound. This enables the formation of a new carbon-carbon bond, resulting in the formation of an aldol product.

Therefore, the purpose of adding a base in the aldol condensation reaction is to deprotonate the α-carbon and generate an electrophilic enolate ion, which can then react with another carbonyl compound to form the desired product.

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Answer:

Explanation:

7 carbon atoms, 6 hydrogen atoms,9 NO2 atoms

7+6+9=22

2(22)=44

44 atoms

Answer:

pH = 10

Explanation:

KOH is a strong base; thus it will completely dissociate:

KOH -> K⁺ + OH⁻

Since it completely dissociates, the concentration of both K⁺ and OH⁻ will be the concentration of KOH given (1.0 x 10^-4 M).

We can then find pOH by taking the negative log of the OH⁻, or hydroxide, concentration:

pOH = -log[OH⁻] = -log[1.0 x 10^-4 M] = 4

At 25 degrees Celsius, pH + pOH = 14. If we solve for pH and then plug in our pOH, we get:

pH = 14 - pOH = 14 - 4 = 10

The pH of a 1.0 x 10^-4 M solution of KOH is thus 10.

Answer:

True

Explanation:

Higher temperature will have greater volumes so the density will be less.

The volume of the balloon at the top of the mountain can be calculated using Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at a constant temperature.

The formula for Boyle's Law is P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume.
We are given the initial pressure (P1) as 101.3 kilopascals, the initial volume (V1) as 2.15 litres, and the final pressure (P2) as 83.1 kilopascals. We need to find the final volume (V2).
Plugging the given values into the formula, we get:
101.3 kPa × 2.15 L = 83.1 kPa × V2
Rearranging the equation to solve for V2, we get:
V2 = (101.3 kPa × 2.15 L) / 83.1 kPa
V2 = 217.795 L / 83.1 kPa
V2 = 2.62 L
Therefore, the volume of the balloon at the top of the mountain is 2.62 litres.

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PO4³⁻ is a symmetric molecule having Sp3 hybridisation.

Hybridization, as related to genomics, is the procedure wherein  complementary unmarried-stranded DNA and/or RNA molecules bond collectively to form a double-stranded molecule.

Hybridisation is a idea of blending atomic orbitals into new hybrid orbitals which might be generally of lower electricity and suitable for the pairing of electrons to shape chemical bonds in valence bond theory.

 1.Lewis Structure = PO4³⁻ image below

2.Perspective drawing = image below

3. Number of atoms bonded to central atom = 4 oxygen atom ( O)

4. Number of non-bonding electron pairs on the central atom = O since P uses all its 5 electrons in forming 5 bonds within the four oxygen.

5. Electronic geometry = Tetrahedral

6. Molecular geometry with ideal bond angles = Tetrahedral with 109.5 degree bond angles.

7. Hybridization of central atom = Sp3 since hybridisation = number of sigma bonds + lone pairs on central atom. Here hybridisation  = 4 + 0 = 4 i.e 1's' and 3 'p' orbital are used in bonding So, Sp3

8. Symmetric or asymmetric = Symmetric

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