Whats is the difference between a strong electrolyte and a weak electrolyte

The balanced equation for the reaction is as follows:

3 AI2O3 (s) + 3C (s) + 2CI2 (g) → 3AICI3 (s) + 3CO (g)

Combination reactions happen when two or more reactants come together to create a single product. In this instance, the reactants are chlorine gas, carbon, and aluminium oxide (AI2O3) (CI2). Aluminum chloride (AICI3) and carbon monoxide make up the final product (CO). Exothermic means that energy is released when the reactants come together in this reaction. Both heat and light are manifestations of this energy. The bonds between the atoms in the reactants are broken and new bonds between the atoms in the product are formed when the reactants combine. The reaction is exothermic because of the energy released during this process.

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Answer:

\(\large \boxed{\text{0.195 mol/L}}\)

Explanation:

(a) Balanced equation

2HNO₃ + Ca(OH)₂ ⟶ Ca(NO₃)₂ + 2H₂O  

(b) Moles of Ca(OH)₂

\(\text{Moles of Ca(OH)}_{2} = \text{21.1 mL Ca(OH)}_{2} \times \dfrac{\text{0.110 mmol Ca(OH)}_{2}}{\text{1 mL Ca(OH)}_{2}}\\= \text{2.321 mmol Ca(OH)}_{2}\)

(c) Moles of HNO₃

The molar ratio is 2 mol HNO₃:1 mol Ca(OH)₂

\(\text{Moles of HNO}_{3} = \text{2.321 mmol Ca(OH)}_{2} \times\dfrac{\text{2 mmol HNO}_{3}}{\text{1 mmol Ca(OH)}_{2}}= \text{4.642 mmol HNO}_{3}\)

(d) Molar concentration of HNO₃

\(c = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{n}{V}\\\\c= \dfrac{\text{4.642 mmol}}{\text{23.8 mL}} = \text{0.195 mol$\cdot$L$^{-1}$}\\\\\text{The molar concentration of the Ca(OH)$_{2}$ is $\large \boxed{\textbf{0.195 mol/L}}$}\)

The balanced equation is: 4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

The given chemical equation is unbalanced. To balance it, we need to adjust the coefficients in front of each chemical species until the number of atoms on both sides of the equation is equal.

The unbalanced equation is:

2 \(H_2S\)+ 3 \(O_2\)→ \(SO_2\)

Let's start by balancing the sulfur (S) atoms. We have two sulfur atoms on the left side and one sulfur atom on the right side. To balance the sulfur, we can place a coefficient of 2 in front of the \(SO_2\):

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)

Now, let's balance the hydrogen (H) atoms. We have four hydrogen atoms on the left side (2 from each \(H_2S\)) and none on the right side. To balance the hydrogen, we can place a coefficient of 4 in front of the water (H2O) on the right side:

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

Finally, let's balance the oxygen (O) atoms. We have six oxygen atoms on the right side (3 from \(O_2\) and 3 from 2 \(SO_2\)) and three on the left side (2 from \(H_2S\)). To balance the oxygen, we can place a coefficient of 3/2 in front of the O2:

2 \(H_2S\)+ (3/2) \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

To remove the fractional coefficient, we can multiply all coefficients by 2:

4 \(H_2S\) + 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

Now the equation is balanced, with an equal number of atoms on both sides. The balanced equation is:

4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

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Answer:

Waning Crescent

Explanation:

Hope iT Help

Brainliest please

Answer:

Explanation:

2Al(OH)₃   +   3H₂SO₄  =    Al₂(SO₄)₃   +   6H₂O

2 moles         3 moles  

2 moles of Al(OH)₃ reacts with 3 moles of H₂SO₄

.55 moles of Al(OH)₃ reacts with .55 x 1.5  moles of H₂SO₄

moles of H₂SO₄ required =   .825 moles

moles available = .55 moles , so  H₂SO₄ is the limiting reagent .

3 moles of  H₂SO₄ yields 1 moles of Al₂(SO₄)₃

.55 moles of  H₂SO₄ yields 1 x .55 / 3  moles of Al₂(SO₄)₃

Al₂(SO₄)₃ produced = 1 x .55 / 3  moles = .1833 moles .

Al(OH)₃  reacted = 2 x .55 / 3 = .367 moles

excess Al(OH)₃ remaining = .5 - .367

= .133 moles .

Approximately 70.57 mL of 1.00 M NaOH should be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.

To determine the volume of 1.00 M NaOH required to produce a buffer with a pH of 4.50 when added to 250 mL of 0.50 M CH3CO₂H, we need to consider the Henderson-Hasselbalch equation and the stoichiometry of the reaction.

The Henderson-Hasselbalch equation for a buffer solution is given as:

pH = pKa + log([A-]/[HA])

In this case, CH3CO₂H (acetic acid) acts as the weak acid (HA) and CH3COO- (acetate ion) acts as its conjugate base (A-). We are given that the desired pH is 4.50, and we can determine the pKa value for acetic acid from reference sources, which is approximately 4.75.

Using the Henderson-Hasselbalch equation, we can rearrange it to solve for the ratio [A-]/[HA]:

[A-]/[HA] = 10^(pH - pKa)

[A-]/[HA] = 10^(4.50 - 4.75) = 10^(-0.25) = 0.5623

This means that the ratio of the acetate ion to acetic acid in the buffer solution should be approximately 0.5623.

To calculate the required volume of NaOH, we need to consider the stoichiometry of the reaction. Acetic acid reacts with hydroxide ions (OH-) to form acetate ions and water:

CH3CO₂H + OH- → CH3COO- + H2O

The stoichiometric ratio between acetic acid and hydroxide ions is 1:1. Therefore, the volume of 1.00 M NaOH needed can be calculated using the equation:

Volume (NaOH) × 1.00 M = Volume (CH3CO₂H) × 0.50 M × 0.5623

Volume (NaOH) = (Volume (CH3CO₂H) × 0.50 M × 0.5623) / 1.00 M

Volume (NaOH) = (250 mL × 0.50 M × 0.5623) / 1.00 M

Volume (NaOH) ≈ 70.57 mL

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Answer:

it would be E. because it would create steam from the h2o

Answer:

A ---->gamma ray

Explanation:

Gamma rays have the highest frequencies among all electromagnetic waves and therefore have the shortest wavelengths.

1. The amount of water produced by the reaction is 0.359 g.

2. The amount of water produced by the reaction is 0.219 g.

To calculate the number of moles of acid neutralized by the tablet, subtract the number of moles of acid neutralized in the titration from the initial solution's moles of acid. Understand and explain standardization in the context of acidic and basic solutions used as reagents in experiments.

1. The neutralization reaction,

HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

we have to calculate the number of moles of HCl that react,

moles of HCl = volume of HCl x concentration of HCl

= 7.98 mL x 2.50 mol/L / 1000 mL/L

= 0.01995 mol

Since NaOH is in excess,

As a result, the amount of water produced will be equal to the amount of HCl that reacts:

moles of water = moles of HCl = 0.01995 mol

we can use the molar mass of water (18.015 g/mol)

mass of water = moles of water x molar mass of water

= 0.01995 mol x 18.015 g/mol

= 0.359 g

2. The neutralization reaction between H2SO4 and NaOH is:

H2SO4 (aq) + 2 NaOH (aq) → Na2SO4 (aq) + 2 H2O (l)

we have to calculate the number of moles of H2SO4 that react,

moles of H2SO4 = volume of H2SO4 x concentration of H2SO4

= 2.43 mL x 2.50 mol/L / 1000 mL/L

= 0.00608 mol

Now, we have to calculate the number of moles of NaOH that react:

moles of NaOH = volume of NaOH x concentration of NaOH

= 2.51 mL x 3.00 mol/L / 1000 mL/L

= 0.00753 mol

we need to use the stoichiometry of the balanced equation,

moles of water = moles of H2SO4 x (2 moles of water / 1 mole of H2SO4)

= 0.00608 mol x 2

= 0.01216 mol

we can use the molar mass of water (18.015 g/mol)

mass of water = moles of water x molar mass of water

= 0.01216 mol x 18.015 g/mol

= 0.219 g

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Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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Answer

(C) nylon

Explanation

H2N-(CH2)6 -NH2 is hexamethylene diamine. The condensation reaction of hexamethylenediamine and adipic acid will produce a polymer, nylon.

Therefore, H2N-(CH2)6 -NH2 is one of the monomers of nylon

The correctanswer is (C)nylon

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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The theoretical yield : = 10.251 g

Given

Reaction

3H₂(g)+N₂(g)→2NH₃(g)

1.81 g H₂

10.2 g N₂

2.19 g NH₃

Required

The theoretical yield

Solution

Find limiting reactant :

H₂ : 1.81 g : 2 g/mol = 0.905 mol

N₂ : 10.2 g : 28 g/mol = 0.364 mol

mol : coefficient

H₂ = 0.905 : 3 = 0.302

N₂ = 0.364 : 1 = 0.364

H₂ as a limiting reactant(smaller ratio)

Moles NH₃ based on H₂, so mol NH₃ :

= 2/3 x mol H₂

= 2/3 x 0.905

=0.603

Mass NH₃ :

= mol x MW

=0.603 x 17 g/mol

= 10.251 g

The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.

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Answer:

dinitrogen pentachloride

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

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Answer:

from the chromosome..l dont know

Answer:

the answer is A. cooking the eggs

Answer:

A. Cooking the eggs

Explanation:

Cooking the eggs is a chemical change because it's a permanent change. There's no way to get the eggs back in its original form as an egg. Breaking the egg, stirring the egg, or even putting spices on the eggs are all examples of physical changes because they don't change the eggs' chemical composition. They only change its appearance.

Answer:

1.hypothesis

2.ask a question

3.experiment

4.collect observations

5.analyze data

6.draw conclusion

Explanation:

Answer:

wave velocity= frequency × wave length

=1×3

=3m/s

Explanation:

The distance covered by the wave in one second is equal to its wavelength, therefore,

wave velocity=wavelength/time period

OR wave velocity= frequency× wavelength

You can assume velocity as speed here.

1. Oxygen is a reactant needed for all combustion reactions.

2. The products of the complete combustion reaction of a hydrocarbon (compound containing carbon and hydrogen) are carbon dioxide and water.

3. Complete combustion takes place if the quantity of oxygen is sufficient.

4. Incomplete combustion takes place if the quantity of oxygen is insufficient.

5. Combustion is a exothermic change.

6. In a combustion reaction, oxygen is the oxidizer and the substance which burns is the fuel.

7. The lower the kindling temperature, the easier is the combustion.

8. If a substance burns at room temperature in the absence of a flame the combustion is said to be spontaneous.

9. Combustion reactions are accompanied by heat and light effect.

10. Combustion reactions don't take place at the same rate.

1)Oxygen is a reactant needed for all combustion reactions. Combustion reactions are chemical reactions that involve the rapid combination of a fuel (usually a hydrocarbon) with oxygen gas. Oxygen acts as the oxidizing agent, providing the necessary component for the reaction to occur. Without oxygen, combustion cannot take place.

2)The products of the complete combustion reaction of a hydrocarbon are carbon dioxide and water. In the presence of sufficient oxygen, hydrocarbons undergo complete combustion, resulting in the production of carbon dioxide (\(CO_2\)) and water (\(H_2O\)). This reaction releases a significant amount of energy in the form of heat and light.

3)Complete combustion takes place if the quantity of oxygen is sufficient. Complete combustion occurs when there is an adequate supply of oxygen available for the reaction. In this case, the fuel (hydrocarbon) reacts completely with oxygen, resulting in the formation of carbon dioxide and water as the only products

4)Incomplete combustion takes place if the quantity of oxygen is limited. In situations where there is insufficient oxygen available, incomplete combustion occurs. This leads to the formation of products such as carbon monoxide (CO) and carbon (soot) in addition to carbon dioxide and water. Incomplete combustion is less efficient and can release harmful pollutants into the environment.

5)Combustion is a chemical change. Combustion is classified as a chemical change because it involves the breaking and forming of chemical bonds between atoms and molecules. The reactants (fuel and oxygen) undergo a chemical reaction to produce new substances (products) with different properties, such as carbon dioxide and water. Heat and light are also typically released during combustion.

6)In a combustion reaction, oxygen is the oxidizer, and the substance that burns is the fuel or combustible material. Oxygen acts as the oxidizing agent, meaning it accepts electrons from the fuel, leading to the oxidation (burning) of the fuel. The fuel provides the carbon and hydrogen atoms that combine with oxygen to form carbon dioxide and water.

7)The lower the kindling temperature, the easier the combustion. The kindling temperature is the minimum temperature at which a substance can ignite and sustain combustion. If the kindling temperature is lower, it means that less heat is required to initiate the combustion process. Substances with lower kindling temperatures are more prone to catching fire and sustaining combustion.

8)If a substance burns at room temperature in the absence of a flame, the combustion is said to be spontaneous. Spontaneous combustion refers to the ignition and burning of a substance without the need for an external ignition source, such as a flame. It occurs when certain materials, under specific conditions, undergo self-heating and eventually reach their ignition temperature, leading to combustion.

9)Combustion reactions are accompanied by heat and light effects. Combustion reactions are highly exothermic, meaning they release a significant amount of heat energy. This energy is released in the form of heat and light, resulting in flames or glowing embers during combustion.

10)Combustion reactions don't take place at the same rate for all substances. The rate of combustion can vary depending on factors such as the nature of the fuel, the availability of oxygen, temperature, and pressure. Different substances have different combustion rates due to variations in their chemical properties and reactivity.

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The point at which a liquid turns into a solid is referred to as its freezing point. In principle, a solid's melting point and liquid's freezing point should coincide. Small variations between these numbers can be seen in real-world situations.

The melting point and freezing point of a substance are the same temperature because freezing happens at the same temperature as melting. The temperature at which a substance becomes liquid or solid is known as the melting or freezing point of that substance.

Liquid water freezes at temperatures below 32°F (0°C); this temperature is known as the freezing point of water. Pure water ice melts and turns into liquid water at temperatures higher than 32°F (0°C);

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Answer:

Explanation:

Aniline is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine.

The equation of line q is determined as y =  ¹/₈x - ⁹/₄.

The slope of a line is the change in y axis to change in x axis.

y = – 8x + 6

from general line equation, y = mx + c

where;

m = - 8

m₂ = -1/m

m₂ = -1/-8

m₂ = 1/8

(y - y₁) / (x - x₁) = m₂

(y + 2)/(x - 2) = 1/8

y + 2 = ¹/₈(x - 2)

y + 2 = ¹/₈x -  ¹/₄

y = ¹/₈x - ⁹/₄

Thus, the equation of line q is determined as y =  ¹/₈x - ⁹/₄.

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Answer:

The gases will expand 8.2 L against the constant pressure of 710 torr.

Explanation:

Given that:

the original volume V₁ = 35 cm³ = 35 × 10⁻⁶ m³

Since the combustion of the mixture releases energy then :

the work W = - 775 J

Pressure = 710 torr

Since 1 torr = 133.322 Pa

710 torr = 94658.62 Pa

We all know that:

W = -PdV

-775 = - 94658.62 Pa ( V₂ - V₁ )

-775 = - 94658.62 ( V₂ - 35 × 10⁻⁶)

-775/ - 94658.62 =  V₂ - 35 × 10⁻⁶

0.008187 = V₂ - 35 × 10⁻⁶

V₂ = 0.008187 + 35 × 10⁻⁶

V₂ = 0.008222 m³

The change in volume dV = V₂ - V₁

The change in volume dV = 0.008222 m³ - 35 × 10⁻⁶ m³

The change in volume dV = 0.008187   m³

To litres

The change in volume dV = 8.2 L

Thus, the gases will expand 8.2 L against the constant pressure of 710 torr.