What kind of reaction is symbolized by AB + C → CB + A?
A. Single replacement
a
B. Double replacement
C. Decomposition
D. Synthesis
SUBMIT

The latent heat of vaporization of boiling water is 540 cal/gm. Option b is the correct answer.

It is the amount of heat needed to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature. The latent heat of vaporization for water is relatively high compared to other liquids because of the strong hydrogen bonding between water molecules. This means that water requires a lot of energy to break these bonds and change from a liquid to a gaseous state. The latent heat of vaporization is also responsible for the cooling effect of evaporation. When sweat evaporates from our skin, it absorbs heat from our body, which helps to cool us down. In conclusion, the latent heat of vaporization of boiling water is 540 cal/gm, which represents the amount of heat required to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature.

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When an acid and an alkali are combined, they react to create a salt and water. This process is called neutralization, and it is an essential part of many chemical reactions.

The specific salt that is produced depends on the acid and alkali that are used. For example, if hydrochloric acid is mixed with sodium hydroxide, the resulting salt will be sodium chloride. The reaction between an acid and an alkali is typically exothermic, meaning it releases heat. The heat that is produced can be used in other chemical reactions or to produce electricity in a process called cogeneration. The resulting salt and water from the neutralization reaction are usually harmless and can be disposed of safely.

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Answer:

59.8g/mol

Explanation:

1 mole will have 6.022 x 10^23 molecules

=> (2.33 x 10^23)/(6.022 x 10^23) = 0.3869 mole

0.3869 mole has mass of 23.14 g

then 1 mole will have = 23.14/0.3869 = 59.8g

Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Stability is the reason that causes atoms  to bond together to form molecules.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. In the nucleus, proton and neutron are present.

Every atoms want to gain stability. To gain stability atoms have to gain noble gas configuration that is outermost shell must contain 2,8, 18 electrons. The atom should follow octet rule. Stability lowers the energy of an atom.

Therefore stability is the reason that causes atoms  to bond together to form molecules.

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The water containing 2% starch solution will not change color immediately when lugol's iodine is added. A dialysis bag is a membrane that is semipermeable and holds the fluids that the kidneys normally remove. They are also used in the experiments.

A solution made of potassium iodide and iodine is known as lugol's iodine. The properties can be used as a reagent and an antiseptic and could be used to diagnose cancer. The iodine in Lugol's solution binds to glycogen's alpha-1,4 glucans, which are polysaccharides. This solution takes time to develop blue color when added to the 2% starch solution.

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Answer:

Explanation:To provide a source of electrons.

In an electrolytic cell, electrical energy is used to drive a non-spontaneous chemical reaction. The power source, such as a battery or a power supply, is connected to the electrodes of the cell. It supplies an external source of electrons to the system.

During electrolysis, the positive electrode, known as the anode, attracts negatively charged ions (anions) and undergoes oxidation, losing electrons. The negative electrode, called the cathode, attracts positively charged ions (cations) and undergoes reduction, gaining electrons. The power source supplies the electrons needed for these reactions to occur.

Overall, the power source ensures a continuous flow of electrons through the circuit, enabling the electrolytic process to take place and facilitate the desired chemical transformations.

Explanation:

Given:

mass of CuSO4 = 0.3 g

mass of Zn = 0.2 g

Formula:

mass of Cu = mass of CuSO4 - (mass of Zn x (mole mass of Cu / mole mass of Zn))

Calculations:

mass of Cu = 0.3 g - (0.2 g x (63.55 g/mol / 65.39 g/mol))

Answer:

mass of Cu = 0.27 g

Answer:

To calculate the mass of copper produced in this reaction, you need to know the mass of CuSO4 and Zn used and the balanced chemical equation for the reaction. Without this information, I cannot perform the calculation for you.

Answer:

Most likely Potential Energy

Explanation:

This is possible because potential energy is stored energy that an object contains until moved, once moved it transfers its potential energy into kinetic energy. In this problem, the kinetic energy in the torch is changed into potential energy once placed on the shelf and deprived of movement. Thus your only viable answer is Potential energy!

Hope this helps, please comment in case wrong so I may figure it out and correct my mistakes

The buffer will have a pH of 7.46 + log(0.274M0.146M) = 7.73. In fact, the buffer's acidity is greater than that of the acid's pKa for these ratios of conjugate base to weak acid.

A buffer solution is what?

Buffer solution refers to a solution whose acidity is not significantly changed by the addition of modest amounts of either an acid or a basic. The solution of reserve acidity or alkalinity that resists pH change upon the addition of a modest amount of acid or alkali is known as a buffer.

How acidic is the buffer solution?

The pH range of the following combinations (McIlvaine's buffer solutions) is 3 to 8. Citric acid, monopotassium phosphate, boric acid, and diethyl barbituric acid can be combined to create

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0.20008 kilometers has the most significant figures; option C

Significant figures in calculations or mathematical expressions are the non-zero numbers that occur after or before a decimal point or zero numbers that occur between non-zero numbers.

Significant figures are used in approximations in order to make numbers approximate values.

Considering the given options:

0.000342 grams = 3 significant figures

150 liters = 2 significant figures

0.20008 kilometers = 5 significant figures

1.5 × 104 light years = 2 significant figures

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Answer:

0.20008 kilometers

Explanation:

Answer:

Maria

Explanation:

Answer:

Maria loves Jarren more is the answer.

The mass number is the atomic mass rounded to a whole number, i.e., which is a value that rounds the atomic weight to a near number.

The expression mass number is used in chemistry to denote the total amount of subatomic particles i.e. atomic protons and neutrons, which are present in a given atom (for example hydrogen has only one proton and one neutron).

Therefore, with this data, we can see that mass number denotes the overall amount of protons and neutrons present in a given atom, which is equal to one in the hydrogen atom

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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

An ionic compound can only dissolve in water if its heat ofsolution in water is exothermic and the statement is False.

An ionic compound can dissolve in water regardless of whether its heat of solution is exothermic or endothermic. The solubility of an ionic compound in water is determined by the balance between the energy required to break the ionic bonds in the solid and the energy released when the ions interact with water molecules.

If the overall process of dissolving is energetically favorable, the compound will dissolve, regardless of whether it is exothermic or endothermic.

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The ion that will form a compound with bicarbonate in a 1:1 cation to anion ratio is hydrogen ion (H+).

Bicarbonate (HCO3-) is an anion that can combine with a cation to form a salt. In a 1:1 cation to anion ratio, the cation must have a charge of +1 to balance the -1 charge of the bicarbonate anion. Hydrogen ion (H+) is a monovalent cation with a charge of +1, and it readily combines with bicarbonate to form the salt hydrogen bicarbonate (H2CO3), also known as carbonic acid. This salt is important in the regulation of pH in the body and is involved in processes such as respiration and acid-base balance.

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Answer:

81 grams of Al

Explanation:

Relative atomic mass of Al = 27

Relative atomic mass in grams = Molar mass

∴ Molar mass of Al = 27g

That means; There's 27g of Al in 1 mole of Al.

1 mole ⇒ 27g

3.0 moles ⇒ 27 x 3.0 = 81g

the word dozen and the number 12 that makes a dozen

Answer:

18.46 L

Explanation:

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

Initial volume (V1) = 12.0 L

Initial pressure (P1) = 760 torr

Final pressure (P2) = 0.650 atm

Final volume (V2) =..?

Next, we shall express the pressure in the same unit of measurement.

Thus, 760 torr is equivalent to 1 atm.

Finally, we shall the new volume of the balloon as follow:

Initial volume (V1) = 12.0 L

Initial pressure (P1) = 1 atm

Final pressure (P2) = 0.650 atm

Final volume (V2) =..?

P1V1 = P2V2

1 × 12 = 0.650 × V2

12 = 0.650 × V2

Divide both side by 0.65

V2 = 12/0.65

V2 = 18.46 L

Therefore, the new volume of the balloon is 18.46 L.

Answer:

where the slope of the titration curve is the greatest

The titration curve can be used to identify the equivalency point of the titration.The volume of titrant is where the titration curve has the steepest slope.

How do you find the equivalence point on a titration curve?

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Answer:

hope this helped

Calcium Hydroxide + Sulfuric Acid = Calcium Sulfate + Water

Explanation:

         When molecules of the constituent components are not entirely mixed, this is referred to as a heterogeneous mixture. You could observe patches of one substance scattered among patches of another substance with the unaided eye or even under a microscope. The mixtures typically manifest as various phases or states of matter.

       The environment on a wet day serves as an illustration of a heterogeneous blend. Air, a gas, and liquid raindrops combine to create the wet atmosphere. Through the less thick air, there are spots of dense liquid water dropping. Due to the presence of two states, or phases, of matter—liquid and gas—it is clearly a heterogeneous mixture.

        Importantly, visibility is lowered on a rainy day. Because sunlight can move through air without being blocked, we can see through it. However, liquid raindrops bend, disperse, and block sunlight, preventing it from passing through the cloudy atmosphere.

         On the planet Earth, heterogeneous mixes make up the great bulk of substances.

        Below are many instances of typical heterogeneous mixtures.

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The amount of alcohol contained in each of the listed beverages can be compared as follows; 1/2 oz of 80 proof liquor > 5 oz of wine (12% alcohol) > 12 oz of wine cooler (5%alcohol) = 12 oz of beer  (5%alcohol) .

A drink that contains alcohol must be an intoxicating beverage. The extent of intoxication of an alcoholic beverage depends on the amount of alcohol that the beverage contains. There are various types of alcoholic beverages as listed in the question.

The amount of alcohol contained in each of the listed beverages can be compared as follows; 1/2 oz of 80 proof liquor > 5 oz of wine (12% alcohol) > 12 oz of wine cooler (5%alcohol) = 12 oz of beer  (5%alcohol) .

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Total heat generated by 2 mole of TiO2(s) is 4.963kJ.

The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.

The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,

q = 2.89 * 25 * 683.697

=> 4963.35

In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.

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Complete question :

determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k

To determine the number of molecules of water of crystallization in the hydrated sodium carbonate and write its correct formula, we can use the given information and perform a calculation.

First, let's calculate the number of moles of nitric acid used in the titration:

Volume of nitric acid used = 28.75 cm³

Concentration of nitric acid = 1.6800 M

Number of moles of nitric acid = concentration × volume

= 1.6800 M × 0.02875 L

= 0.04824 moles

Since the reaction between nitric acid and hydrated sodium carbonate is 1:1, the moles of nitric acid used are equal to the moles of hydrated sodium carbonate.

Now, let's calculate the number of moles of hydrated sodium carbonate:

Mass of hydrated sodium carbonate used = 138.14 g

Molar mass of hydrated sodium carbonate = 105.99 g/mol (\(Na_2CO_3\))

Volume of solution prepared = 600.00 cm³ = 0.6 L

Number of moles of hydrated sodium carbonate = mass / molar mass

= 138.14 g / 105.99 g/mol

= 1.302 moles

Since the moles of nitric acid and hydrated sodium carbonate are equal, we can determine the number of water molecules of crystallization in the hydrated sodium carbonate.

The molar ratio between hydrated sodium carbonate and water can be found from the balanced chemical equation. Let's assume the formula of hydrated sodium carbonate is \(Na_2CO_3\) · x\(H_2O.\)

From the balanced equation:

1 mole of\(Na_2CO_3\) · x\(H_2O.\) reacts with x moles of water.

Therefore, in this case:

1.302 moles of \(Na_2CO_3\) · x\(H_2O.\) reacts with x moles of water.

Since the number of moles of water is equal to the number of moles of hydrated sodium carbonate, we can conclude that the correct formula for the hydrated sodium carbonate is \(Na_2CO_3\) ·\(1.302 H_2O.\)

So, the number of water molecules of crystallization in the hydrated sodium carbonate is 1.302.

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To dissolve in 743 ml of solvent with a solubility ratio of 1.8, [x] grams of the sample are needed.

The solubility ratio represents the amount of solute that can dissolve in a given amount of solvent. In this case, the solubility ratio is 1.8, indicating that 1 unit of the sample can dissolve in 1.8 units of the solvent. To find the amount of sample needed to dissolve in 743 ml of solvent, we can set up a proportion:

Sample / Solvent = Solubility Ratio

Let's denote the amount of sample needed as 'x'. Thus, we have:

x / 743 ml = 1.8

To solve for 'x', we cross-multiply:

x = 1.8 * 743 ml = 1337.4 ml

Therefore, approximately 1337.4 grams of the sample are needed to be dissolved in 743 ml of solvent.

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Answer:

The vinegar is not enough to neutralize the pool.

Explanation:

The [OH⁻] in the pool is 1.0x10⁻¹mol / L. To know how many moles of OH⁻ are in the solution, you must calculate volume of the pool thus:

V(pool) = πr²h

Where r, radius is d/2 = 12m/2 = 6m  and h is deep of the pool = 10m

V(pool) = π(6m)²*10

V(pool) = 1131m³

As 1m³ = 1000L:

1131m³  × (1000L / 1m³) = 1131000L in the pool.

And moles of OH⁻ are:

1.0x10⁻¹mol / L ₓ 1131000L = 131100 moles of OH⁻ are in the pool

The neutralization of OH⁻ with H⁺ is:

OH⁻ + H⁺ → H₂O

That means to neutralize the pool you must add 131100 moles of H⁺.

The H⁺ concentration in a vinegar pH = 2 is:

pH = -log [H⁺]

2 = -log [H⁺]

1x10⁻²M = [H⁺]

4L are just 4x10⁻² moles of [H⁺]. As you need 131100 moles of H⁺: