a chemist has three different acid solutions. the first acid solution contains 25 % acid, the second contains 35 % and the third contains 65 % . they want to use all three solutions to obtain a mixture of 102 liters containing 40 % acid, using 2 times as much of the 65 % solution as the 35 % solution. how many liters of each solution should be used?

Answer:

The pressure of the gas when the temperature drops to 65°C is 133 Torr.

Explanation:

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the answer is Te because O is oxygen.

Answer:

O

Explanation:

this is because it is oxygen

The approximate standard errors for r1, r2, and r3 are respectivelySE(r1) ≈ 0.316 (option B), SE(r2) ≈ 0.341 (option C), SE(r3) ≈ 0.397

To calculate the approximate standard errors for r1, r2, and r3, we'll use the given formulas:

\(SE(r1) = 1 / sqrt(n)\)

where n = 10 in this case. Substituting the value, we get:

\(SE(r1) = 1 / sqrt(10) ≈ 0.316\)

Therefore, the approximate standard error for r1 is approximately 0.316, which corresponds to option (B).

\(SE(r2) = sqrt((1 + 2r1^2) / n)\)

Using the value of r1 from the previous calculation (r1 ≈ 0.316) and substituting the other values:

\(SE(r2) = sqrt((1 + 2 * 0.316^2) / 10) ≈ 0.341\)

Thus, the approximate standard error for r2 is approximately 0.341, which corresponds to option (C).

\(SE(r3) = sqrt((1 + 2r1^2 + 2r2^2) / n)\)

Using the values of r1 ≈ 0.316 and r2 ≈ 0.341, and substituting the other values:

\(SE(r3) = sqrt((1 + 2 * 0.316^2 + 2 * 0.341^2) / 10) ≈ 0.397\)

Therefore, the approximate standard error for r3 is approximately 0.397.

To summarize:

SE(r1) ≈ 0.316 (option B)

SE(r2) ≈ 0.341 (option C)

SE(r3) ≈ 0.397

These are the approximate standard errors for r1, r2, and r3, respectively.

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Explanation:

ascorbic acid is lemon

lemon contain ascorbic acid....

it is organic acid.....

The complete and balanced equation for the neutralization reaction is written as: 3KOH + H₃PO₄ -> K₃PO₄ + 3H₂O

To balance the equation, we must obtain the product of the reaction.

We were told from the question that the reaction is a nuetralization reaction. This implies that the product of the reaction must be salt and water.

Thus, the complete equation is:

KOH + H₃PO₄ -> K₃PO₄ + H₂O

Now, we shall obtain the balance equation. This is illustrated below:

KOH + H₃PO₄ -> K₃PO₄ + H₂O

There are 3 atoms of K on the right side and 1 atom on the left side. It can be balanced by writing 3 before KOH as shown below:

3KOH + H₃PO₄ -> K₃PO₄ + H₂O

There are 2 atoms of H on the right side and a total of 6 atoms on the left side. It can be balanced by writing 2 before H₂O as shown below:

3KOH + H₃PO₄ -> K₃PO₄ + 3H₂O

Thus, the equation is balanced.

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Complete question:

Complete and balance the following neutralization reactions.

KOH + H₃PO₄ -> _

Answer:

No, air is not a good conductor of electricity.

It is poor conductor.

Taking into account the reaction stoichiometry and ideal gas law, 0.48144 grams of KClO₃ was decomposed.

In first place, the balanced reaction is:

2 KClO₃  → 2 KCl + 3 O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

165 mL of oxygen is produced at 30.0 °C and 90.0 kPa. This is, you know:

Replacing in the ideal gas law:

0.888231 atm× 0.165 L = n× 0.082 \(\frac{atmL}{molK}\)× 303 K

Solving:

n= (0.888231 atm× 0.165 L)÷ (0.082 \(\frac{atmL}{molK}\)× 303 K)

n= 0.0059 moles

Finally, 0.0059 moles of oxygen is produced at 30 °C and 90 kPa.

The following rule of three can be applied: If by stoichiometry of the reaction 3 moles of O₂ are produced by 244.8 grams of KClO₃, 0.0059 moles of O₂ are produced by how much mass of KClO₃?

\(mass of KClO_{3}= \frac{0.0059 moles of O_{2}x 244.8 grams of KClO_{3}}{3 moles of O_{2}}\)

mass of KClO₃= 0.48144 grams

Finally, 0.48144 grams of KClO₃ was decomposed.

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Answer: 22.4 L

Explanation:

the constant for one mol of gas at STP is always 22.4 L and this constant is used in equations when converting from L to mol or mol to L

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The chemical structure of enveloped and nonenveloped viruses is different. Enveloped viruses have an additional lipid bilayer surrounding their capsid, while nonenveloped viruses do not have this outer layer.

Let's look at each type of virus in more detail:

Enveloped viruses :RNA or DNA-containing nucleic acids are encased in a capsid comprised of protein subunits in enveloped viruses. The viral envelope, a lipid bilayer, is subsequently used to encircle this capsid. Numerous viral glycoproteins that are important in the virus' entrance into the host cell are found in the viral envelope, which is formed from the membrane of the host cell.

Nonenveloped viruses are those that don't have an exterior lipid envelope. They are composed comprised of a nucleic acid encased in a protein-based capsid. Nonenveloped viruses' protein capsids can take on a variety of morphologies, including complicated icosahedral, and helical. Spikes or protrusions on the surface of several nonenveloped viruses aid in their ability to cling to and penetrate host cells.

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Answer:

the equation is already balanced

The distance from the thermal energy source affect the amount of thermal energy transfer occurring in a substance in a way that area that the radiation is spread over is four times as large for just the double distance.

Thermal energy that can transfer between substances always does so from one that is warmer to one that is cooler. Conduction, convention, and radiation are the three categories. Distance causes the heat radiation emitted by a source, such the sun, to disperse.

As it moves away from the source, the same quantity of energy is dispersed over a larger and larger sphere every second. For simply the twice distance, the radiation's distribution area is four times as large.

The solar constant (also known as the solar coefficient), abbreviated S, refers to the Sun's intensity on Earth, \(W/m^{2}\), in units. This information reveals how much radiation enters a square metre of Earth (or any other planet at a similar distance from the sun).

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Answer:

Plastic bag.

Explanation:

Plastic bag can hold more weight as compared to paper bag because the plastic bag has more strength which holds more weight. Th paper bag can be tear easily when it physically contact with the water while on the other hand, plastic bag will not tear down and save from it. So due to these features people use plastic bags for carrying materials as compared to other bags.

The volume of the square shown in the diagram, given that it has a length of 4 in. is 64 in³

Volume of a square is given by the following formular:

Volume = Length × Width × Height

Recall:

For square shapes, length, width and height are equal i.e

Length = Width = Height

Thus, we can write that the volume of square as:

Volume of square = Length × Length × Length

Now, we shall obtain the volume of square. Details below:

Volume of square = Length × Length × Length

= 4 × 4 × 4

= 64 in³

Thus, the volume of the square is 64 in³

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Fusion reactions happen in high temperatures and pressures.

Answer:A. normal temperatures and pressures

Explanation:

Answer: 62.4g according to a quizlet

Explanation:

"Normal red blood cells are rounded and disk-shaped. In sickle cell anemia, some red blood cells become deformed, so they look like sickles used to cut wheat. These unusually shaped cells give the disease its name. Sickle cell anemia is one of a group of disorders known as sickle cell disease."

Answer:

geosphere.

Explanation:

It is earth. rocks are not in the air, living things, or water mostly.

In an inverted trophic pyramid, greater biomass is present in the secondary carnivores than in the primary producers. Compared to terrestrial systems, aquatic systems are more likely to feature inverted pyramids.

In an inverted trophic pyramid, greater biomass is present in the secondary carnivores. This unique phenomenon deviates from the traditional pyramid shape typically found in trophic structures. Generally, biomass decreases as one ascends the trophic levels, with primary producers having the most biomass and tertiary consumers having the least.

Compared to terrestrial systems, aquatic systems are more likely to feature inverted pyramids. This is mainly due to the rapid turnover rate of phytoplankton, which are the primary producers in aquatic ecosystems. As phytoplankton have a short lifespan and high reproductive rate, they are consumed rapidly by zooplankton, the primary consumers. Consequently, the biomass of primary producers in aquatic systems is relatively lower at any given time.

In contrast, terrestrial ecosystems usually have a more stable and long-lasting primary producer base, such as trees and plants, resulting in the traditional pyramid shape.

In summary, an inverted trophic pyramid is characterized by a greater biomass in secondary carnivores compared to primary producers, a pattern more commonly found in aquatic ecosystems than in terrestrial systems. This distinctive structure results from the rapid turnover rate of primary producers in aquatic environments.

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Answer:

D.to prevent dilution of the base, which may affect the results

Explanation:

edge

Answer:

The answer is D to prevent dilution of the base, which may affect the results

I just finished the test, good luck!

Explanation:

Answer: 23.0ºC

Explanation:

Just trust me

Answer:

B

Explanation:

Edge 2023

Answer:

CO2

Explanation:

You have 3 C for 6 O, then the empirical will be 1 C for 2 O

=> CO2

Answer:

A precipitate will be formed, it will be Cu(OH)2.

Explanation:

This is due to it's solubility.

There will be a precipitate due the solubility which will be result in the Cu(OH)2 precipitate.

A double replacement reaction is a chemical reaction in which two reactant and product exchange cations or anions to produce two new products.

Double replacement reactions are also referred to as double displacement reactions or metathesis reactions.

The simplest way to detect a double displacement reaction is to see if the cations exchanged anions with one another.

If the states of matter are mentioned, look for soluble reactants and the creation of a single solid product, as the reaction typically produces a precipitate.

As a result of the solubility, a precipitate will form, resulting in the Cu(OH)2 precipitate.

Thus, this is the result of the reaction.

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2.87 g of silver chloride can be made by reacting 200.0 mL of calcium chloride with 170.0 mL of silver nitrate, both of which have a 0.23 M silver nitrate concentration. Chemically, silver chloride is a substance.

AgCl is the chemical formula for this. It is generally known that this white crystalline substance is only weakly soluble in water. Silver chloride changes from grey to black or purplish in hue upon illumination or heating, indicating the presence of silver. As the mineral chlorargyrite, AgCl can be found in nature. Chemical processes take place everywhere around us, from the food our bodies metabolize to how the sunlight we receive is produced.

silver chloride mass: m (AgCl)=0.02*143,32g/mole=2.87 g, where n (AgCl) = (0.02*2)/2=0.02 moles.

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Explanation:

Mammals and birds have a unique metabolic process that allows them to generate their own body heat, known as endothermy or warm-bloodedness. This means that they can regulate their body temperature internally, regardless of the external temperature.

The process of generating heat requires a lot of energy, which is primarily produced through the breakdown of nutrients, such as glucose and fatty acids, obtained from food. The mitochondria, which are present in almost all cells of the body, play a critical role in this process. They use oxygen to convert these nutrients into energy in the form of ATP (adenosine triphosphate), which powers the metabolic processes necessary for maintaining body temperature.

Mammals and birds also have specialized tissues that help generate and conserve heat, such as brown adipose tissue and feathers. These tissues contain a high density of mitochondria, which allows for more efficient energy production and heat generation.

Overall, the ability of mammals and birds to generate their own heat is a key adaptation that enables them to thrive in a wide range of environments, from the icy poles to the scorching deserts.

Answer:

A. Antoine Lavoisier

Explanation:

He is know for creating the first chemical textbook. This textbook included rules for naming different chemical compounds, which is the still the same method we use to this day.

Hoped this can help! :D

Answer:

a

Explanation:

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer:

renewable energy sources such as solar and wind DONT emit carbon dioxide and other greenhouse gases that contribute to global warming

Explanation:

Answer:

 a supply of electric charges which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges.

Explanation:

There's your answer have a good day

An air mass is saturated when it holds all the water vapor it can at a given temperature and pressure, which is its maximum its capacity will allow.

An air mass is a large body of air that has uniform temperature, humidity, and pressure characteristics in the horizontal direction. Air masses can cover hundreds or thousands of square miles and can extend vertically into the atmosphere for several kilometers.

In other words, it is holding 100% of the moisture that it can hold at that specific temperature and pressure. If the air mass continues to cool down or its pressure decreases, some of the water vapor may condense into liquid droplets or ice crystals, which can lead to cloud formation and precipitation.

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