Choose the strong acid from the follwing :
a)CH300H
b)H2SO4

A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.

This law combined the three gas laws that is (i) Charle's Law (ii) Gay-Lussac's Law and (iii) Boyle's law.

It is expressed as

\(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\)

where,

P₁ = first pressure

P₂ = second pressure

V₁ = first volume

V₂ = second volume

T₁ = first temperature

T₂ = second temperature

Now put the values in above expression we get

\(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\)

\(\frac{1.02\ atm \times 2.30\ L}{281\ K} = \frac{P_2 \times 1.41\ L}{298\ K}\)

\(P_{2} = \frac{1.02\ atm \times 2.30\ L \times 298\ K}{281\ K \times 1.41\ L}\)

P₂ = 1.76 atm

Thus from the above conclusion we can say that A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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The light reaction is known as the first stage of photosynthesis process. The ultimate source of electrons that are transferred during the light-dependent reactions of photosynthesis is water.

The light dependent reaction is also called the photolysis in which solar energy is converted into chemical energy in the form of ATP and NADPH. This reaction generally occurs in the grana of chloroplasts.

The ultimate source of electrons supplied to the photosynthesis reaction is water. The light energy from the sun is generally used for the splitting of water into oxygen, electrons and 4H⁺ ions.

Thus the ultimate source of the electrons in light-dependent reactions of photosynthesis is water.

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Fungi are more closely related to animals than plants, it can be surprising because it challenges their preconceived notions based on visual similarities. It also highlights the complexities of the natural world and the need for scientific classification to reflect the true relationships between organisms.

The classification of living organisms. Traditionally, organisms were classified into five kingdoms: Monera (bacteria), Protista (single-celled eukaryotes), Fungi (mushrooms, yeasts, molds), Plantae (plants), and Animalia (animals).

Fungi are often mistaken to be related to plants because they are immobile and have similar appearances to some plants, such as mushrooms. However, fungi are actually more closely related to animals.


1. Cellular structure: Fungi, like animals, have eukaryotic cells. This means that their cells contain membrane-bound organelles, including a nucleus. Plants, on the other hand, have cell walls made of cellulose and chloroplasts for photosynthesis.

2. Mode of nutrition: Fungi and animals are heterotrophs, meaning they cannot produce their own food and rely on organic matter for nutrition. Plants, however, are autotrophs and can photosynthesize to produce their own food.

3. Reproduction: Fungi reproduce through the production of spores, just like some animals do. Plants, on the other hand, reproduce through seeds or spores as well, but the structure and process differ from fungi.

So, when people learn that fungi are more closely related to animals than plants, it can be surprising because it challenges their preconceived notions based on visual similarities. It also highlights the complexities of the natural world and the need for scientific classification to reflect the true relationships between organisms.

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The Big Bang Theory describes the formation of the universe, which scientists believe happened 13.7 billion years ago. The Big Bang Theory is a theory that explains the formation of the observable universe.

Under the Big Bang theory, the universe began as a very hot, very dense point in space that began expanding outward. It still expands today. This model describes the universe as a super ball with a very high density and temperature that explodes and is still expanding until today.

The Big Bang is a scientific theory about how the universe started and then made of group of stars known as the galaxies we see today.

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Answer:

C. Solubility is how much solute will dissolve in solvent.

Explanation:

Solvent dissolves solutes, not the other way around, and solids aren't the only things that have solubility, I don't see how precipitation has anything to do with this, so answer C. is the correct answer. Also, I took the test and got the answer right.

The statement that is true about solubility is "Solubility is how much solute will dissolve in solvent".

Solubility is the amount of solute that can be dissolved in a solvent. Generally, the solubility of most solutes increases with an increase in the temperature of the solvent.

The property that can help sugar molecules or salt crystals to dissolve is known as solubility.

Factors that affect solubility include:

Concentration of the solute

Temperature

Pressure

Polarity of the solute and the solvent

Given options are-

Solubility is how much solid only will dissolve in liquid only.

Solubility is how much solvent will dissolve in solute.

Solubility is how much solute will precipitate out of solvent.

Solubility is how much solute will dissolve in solvent.

Therefore, The statement that is true about solubility is "Solubility is how much solute will dissolve in solvent".

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The pH at the equivalence point is 3.16.

the pH at the equivalence point, we need to first determine the moles of each reactant.

Moles of hydrofluoric acid = (25.0 mL)(0.150 M) = 0.00375 moles

Since the reaction between hydrofluoric acid and sodium hydroxide is a 1:1 ratio, the moles of sodium hydroxide at equivalence point will also be 0.00375 moles.

Next, we can use the balanced chemical equation to find the concentration of hydroxide ions at equivalence point:

HF + NaOH → NaF + H2O

0.00375 moles of NaOH = 0.00375 moles of HF

Using the Ka expression for HF:

Ka = [H+][F-]/[HF]

We can assume that at the equivalence point, all of the HF has reacted with the NaOH to form NaF and water, leaving only F- and some leftover NaOH.

[NaOH] = 0.150 M

[F-] = 0.00375 moles / 0.025 L = 0.15 M

[H+] = Ka x [HF]/[F-] = (3.5 x 10^-4) x (0.00375 moles / 0.025 L) / 0.15 M = 7.0 x 10^-4 M

Using the pH equation:

pH = -log[H+] = -log(7.0 x 10^-4) = 3.16

Therefore, the pH at the equivalence point is 3.16.

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Answer:

The answer is 1.806 × 10²⁴ CO2 molecules

Explanation:

The numbers of molecules can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities.

From the question we have

N = 3 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Question :

Where do most fungi thrive ?

Answer :

Fungi are found all around the world and grow in a wide range of habitats, including deserts. Most grow on land (terrestrial) environments, but several species live only in aquatic habitats. Most fungi live in either soil or dead matter, and many are symbionts of plants, animals, or other fungi.

Source :

CK-12 , Edgenuity2020

Answer:

The difference between solid, liquid and gas can be drawn clearly on the following grounds:

Explanation:

Definition of Solid

By the term ‘solid’ we mean the type of matter which is rigid in structure and opposes the change in its shape and volume. The particles of a solid are tightly bound and well-arranged in a regular pattern, which does not allow the particles to move freely from one place to another. The particles continuously vibrate and twist, but there is no motion, as they are too close to each other.  As the intermolecular attraction is maximum in solids, and because their shape is fixed, and the particles stay, where they are set. In addition to this, the compression of solid is very tough, as the spaces between molecules are already very less.

Definition of Liquid

A free flowing substance of constant volume having consistency is called as the liquid. It is a type of matter which do not have its shape but takes the shape of the vessel, in which it is held. It contains small particles, which are held tightly by intermolecular bonds. One of the unique property of liquid is surface tension, a phenomenon which makes the fluid possess the minimum surface area.  The compression of liquid is a nearly difficult, due to less gap between particles. The particles are closely bound, but not as tightly as in the case of solid. Thus allowing the particles to move around and mix with one another.

Definition of Gas

Gas is described as a state of matter which diffuses freely in all directions and fills the entire space available, regardless of the quantity. It is made up of particle that does not have a certain shape and volume. The particles can be individual atoms or elemental molecules or compound molecules.  In gases, the molecules are loosely held, and so there is a lot of space between molecules to move freely and constantly. Due to this characteristic, the gas has the ability to fill any container, as well as it can be easily compressed.

Answer:

the spaces between the molecules and the kinetic energy are minimum in solids, medium in liquid and maximum in gases. So, the motion of molecules is negligible in solids, whereas in liquids, the erratic, random motion of molecules can be seen. Unlike gases, which have the free, constant and random motion of molecules.

Explanation:

In order to determine if the forward reaction is endothermic or exothermic, we need to analyze the change in concentration of nitrogen dioxide (NO2) as the temperature increases.

If the concentration of nitrogen dioxide increases with increasing temperature, it suggests that the forward reaction is favored by higher temperatures and is therefore endothermic. This means that the forward reaction absorbs heat energy from the surroundings to proceed.

On the other hand, if the concentration of nitrogen dioxide decreases with increasing temperature, it indicates that the forward reaction is exothermic. In an exothermic reaction, the forward reaction releases heat energy to the surroundings.

Therefore, to determine whether the forward reaction in this case is endothermic or exothermic, we need more information about the change in concentration of nitrogen dioxide as the temperature increases.

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Answer:

4 valence electrons

Explanation:

When solution aqueous solutions of Barium chloride and Sodium sulphate are mixed, here Sodium and Chloride ions are spectator ions as their state does not change in this reaction.

Spectator ions in any reactions are the ions who does not participate in the particular reaction. The state of these ions is same throughout the reaction. The charges on these ions remains same they do not get oxidized or reduced. Spectator ions do not get precipitate in any reaction. They can be cancelled from both side of the reaction. When aqueous solutions of Barium chloride and Sodium sulphate reacts, the resultant product will be Barium chloride and Sodium sulphate. It is an example of double displacement reaction.

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Answer:

no, but they contain a compound plant called amygdalin, so technocly yes

Explanation:

Answer:

if bees have a choice between red and yellow flowers, then they will prefer the red flowers.

Explanation:

this is because red flowers have a very intense attractive brightening appears the makes it very visible to the bee and also, red flowers produce more nectar

Answer:

d.

Explanation:

Answer:

D!

Explanation:

A is not true! When big meteors fall into the ocean, they cause mega-tsunamis I think, which does a lot of damage.

B, no, Uranus does too.

C, I think this is untrue, red wavelength and reflects the blue the blue!

D, is so true! A lot of reliable sources on this one!

Sorry if I did any wrong, I haven't learn chemistry in school yet.

In this question, we have:

31.1 grams of O2

84.3 grams of F2

94.9 L of total volume

55.77°C of temperature which is equal to 328.92 K

Now, to find the pressure of this container, we can find the number of moles of each gas, and add both values together making it one value of moles and then we will use the Ideal gas law to find the pressure, so let's start with O2

The molar mass of O2 is 32g/mol and we have 31.1 grams

32g = 1 mol

31.1g = x moles

x = 0.972 moles of O2

Now for F2, the molar mass is 38g/mol, and we have 84.3 grams

38g = 1 mol

84.3g = x moles

x = 2.22 moles of F2

Now we add these values, 0.972 + 2.22 = 3.192 moles

And now we can use the ideal gas law formula:

PV = nRT

Remember that R is the gas constant, 0.082

P * 94.9 L = 3.192 * 0.082 * 328.92

94.9P = 86.1

P = 0.91 atm

A buffer solution is defined as a solution that resists a change in pH when a small amount of acid or base is added to it. the buffer capacity of the solution will prevent the pH from changing too much.

The buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will experience the following changes when a small amount of HClO4 is added to it: The HClO4 added to the buffer solution will react with the potassium nitrite, KNO2, to form the salt, KClO4.T

he HNO2 will be converted to nitric acid, HNO3, by the HClO4.The HNO3 formed in the previous step will react with the potassium nitrite, KNO2, to form nitric oxide, NO, and potassium nitrate, KNO3.The net effect of adding HClO4 to the buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will be to shift the buffer solution to a more acidic pH range.

However, the buffer capacity of the solution will prevent the pH from changing too much.

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The reaction of acetyl chloride with methanol is an example of an acyl substitution reaction. The mechanism of this reaction can be described as follows:

Step 1: Protonation of Acetyl Chloride

Acetyl chloride (CH3COCl) reacts with a proton (H+) from a proton source, such as HCl, to form the acylium ion (CH3CO+).

CH3COCl + H+ → CH3CO+ + Cl-

Step 2: Nucleophilic Attack by Methanol

Methanol (CH3OH) acts as a nucleophile and attacks the acylium ion at the carbonyl carbon atom, leading to the formation of a tetrahedral intermediate.

CH3CO+ + CH3OH → CH3COCH3OH+

Step 3: Loss of Protonated Alcohol

The tetrahedral intermediate formed in step 2 is unstable and undergoes elimination of the protonated alcohol to form the acetylated methanol product (CH3COOCH3) and a hydronium ion (H3O+).

CH3COCH3OH+ → CH3COOCH3 + H3O+

Overall, the reaction can be summarized as follows:

CH3COCl + CH3OH → CH3COOCH3 + HCl

In this reaction, acetyl chloride acts as the acylating agent and methanol acts as the nucleophile. The reaction proceeds through an intermediate and the final product is an ester, acetylated methanol. This reaction is widely used in organic synthesis for the preparation of esters

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Answer:

A

Explanation:

A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site

The pressure of a gas is directly proportional to its volume, according to Boyle's Law. this pressure is less than the maximum pressure that the can can withstand (3,800 kPa), the can will not burst.

Therefore, we can use the following equation to find the pressure of the gas in the can after it is crushed: P1V1 = P2V2 where P1 and V1 are the initial pressure and volume of the gas, and P2 and V2 are the final pressure and volume of the gas, respectively. Given that the initial volume (V1) of the gas in the can is 235 mL and the initial pressure (P1) is 110 kPa, we can substitute these values into the equation P1V1 = P2V2 110 kPa × 235 mL = P2 × 8.5 mL Solving for P2, we get: P2 = (110 kPa × 235 mL) / 8.5 mL P2 = 3,027 kPa Therefore, the pressure of the gas in the can after it is crushed to a volume of 8.5 mL is 3,027 kPa. Since this pressure is less than the maximum pressure that the can can withstand (3,800 kPa), the can will not burst.

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Answer:

30

Explanation:

I believe it's 30 because half of 24 is 12 and that is its half life. And as you know it took 30 minutes to get there.

Answer:

The correct answer is (1). Zn has the highest electronegativity of all the metals in its column. It has a strong attraction for electrons and low ionization potential, so if potassium chloride were used instead of hydrochloric acid, potassium would react most readily.

Explanation:

This question is asking which metal will react most readily. According to the activity series, alkali metals are more reactive than alkaline earth metals. Magnesium has the lowest outer electron configuration of all the metals in its row on the periodic table so it will have a strong attraction for electrons. The magnesium atom therefore requires less energy to reach an outer energy level so it has the lowest first ionization potential. Therefore, magnesium will react most readily with HCl.

The dominant transport mechanism in the lake is diffusion. The water treatment plant has a limited time before it needs to start treating for manganese, and the minimum height above the lake bottom for the water intake to provide one year for designing and installing a manganese treatment system needs to be determined.

Dominant transport mechanism: Diffusion is the main transport mechanism in the lake. This means that manganese is gradually diffusing from the solid deposits at the lake bottom into the water column.

 t = (L^2) / (4D)

where t is the time in seconds, L is the distance from the bottom (1 ft or 30.48 cm), and D is the diffusion coefficient of manganese (6.88×10^(-6) cm^2/s).

Calculation Plugging in the values into the equation, we can calculate the time it takes for manganese to reach the water intake level.

  t = (30.48^2) / (4 × 6.88×10^(-6)) = 126,707 seconds

  Converting seconds to days: 126,707 seconds ÷ (24 hours/day × 3600 seconds/hour) ≈ 1.47 days

  Therefore, the water treatment plant has approximately 1.47 days before it needs to start treating for manganese.

Minimum intake height: To provide one year for designing and installing a manganese treatment system, the intake should be raised to a height where the time it takes for manganese to reach that level is one year.

  t = (L^2) / (4D)

  Rearranging the equation to solve for L:

  L = √(4Dt)

  Plugging in the values: L = √(4 × 6.88×10^(-6) cm^2/s × (1 year × 365 days/year × 24 hours/day × 3600 seconds/hour))

  L ≈ 49.65 cm or 0.163 ft

The minimum height above the lake bottom that the intake should be raised to is approximately 0.163 ft.

The dominant transport mechanism in the lake is diffusion, where manganese is slowly diffusing from the solid deposits into the water column. The water treatment plant has approximately 1.47 days before it needs to start treating for manganese to maintain concentrations below the detection limit. To provide one year for designing and installing a treatment system, the intake should be raised to a minimum height of approximately 0.163 ft above the lake bottom.

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The density of magnesium will be 1.74 g/cm³ if 23.5 g of magnesium occupies 13.5 cm³

Density is the measurement of how tightly a material is packed together.

It is defined as the mass per unit volume.

Given ;

Formula to calculate density ;

Density = mass / volume

             =23.5 / 13.5 = 1.74 g/cm³

Hence, the density of magnesium will be 1.74 g/cm³ if 23.5 g of magnesium occupies 13.5 cm³.

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Answer: Thomson - Electrons

Rutherford - Nucleus

Bohr - Electron energy levels

Explanation: I just took the quiz

Answer:

Answer: Thomson - Electrons

Rutherford - Nucleus

Bohr - Electron energy levels

In 12 minutes, 42.5 grams of C will be formed.

From the given information, we know that the rate of the reaction is proportional to the product of the amounts of A and B not yet converted to C. Let's use the variables x and y to represent the amounts of A and B, respectively, that have not yet been converted to C.

We are told that initially, there are 40 grams of A and 50 grams of B. We also know that for each gram of B, 2 grams of A are used. This means that after some time t, the amounts of A and B not yet converted to C are given by:

x = 40 - 2yt
y = 50 - yt

where t is measured in minutes.

We are given that 15 grams of C is formed in 6 minutes. We can use this information to find the value of the proportionality constant k.

The rate of the reaction is given by:

dC/dt = kxy

At t=0, x=40 and y=50, so the rate is:

dC/dt = k(40)(50) = 2000k

After 6 minutes, 15 grams of C have been formed, so:

dC/dt = 15/6

Setting these two expressions for dC/dt equal to each other and solving for k, we get:

2000k = 15/6

k = 0.000625

Now we can use the rate equation to find the amount of C formed after 12 minutes:

dC/dt = kxy

At t=12, x = 40 - 2y(12) = 40 - 24y
y = 50 - 12y

Substituting these expressions into the rate equation and integrating with respect to time from 0 to 12, we get:

C(12) - C(0) = ∫(0 to 12) k(40 - 24y)(50 - 12y) dy

Solving this integral, we get:

C(12) = 42.5 grams

Therefore, 42.5 grams of C are formed in 12 minutes.

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Answer:

It's already balanced.

Explanation:

REACTANTS PRODUCTS

H = 2 H =2

S = 1 S = 1

O = 7 O = 7

Ca = 1 Ca = 1

C = 1 C =1