Julie tears a piece of notebook paper. This is a(n) _____.

Answer:

143 parts I think probably not

The pressure calculated as the difference between the net hydrostatic pressure and the net colloid osmotic pressure is known as: filtration pressure.

Pressure can be defined as a measure of the force exerted per unit area of an object or body. Thus, it is usually measured in Newton per meter square.

In Science, there are different types of pressure and these include the following:

Filtration pressure is a pressure that is typically calculated as the difference between the net hydrostatic pressure and the net colloid osmotic pressure. Also, it promotes the filtration of fluid through a membrane.

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In fire, the energy released is slower as compared to the explosion in which the energy released is faster and more damaging.

Fires and Explosions are phenomena that releases a high amount of heat and light into their surrounding. Both of them causes the surroundings to burn down if they are not performed or caused in a controlled environment.

However, the main difference between the two is the rate at which the energy is released. In a fire, the energy which is released be it heat energy or light energy, the energy is released slowly through combustion as compared to explosions. Fires basically involve a sustained combustion process.

In an explosion the energy that is released at an extreme rate, it creates shockwaves that can cause damage significantly to its surrounding. Explosions are a one-time event.

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Answer:

Ethane & propane are members of same homologous series : alkane which is indicated with Cn H2n+2

Explanation:

Answer:

Relative atomic mass of uranium = (238 x 0.50) + (235 x 0.20) + (234 x 0.30) = 236.3

Aspirin exerts the following effects: analgesic (pain relief), antipyretic (fever reduction), and anti-inflammatory (reduces inflammation). It does not possess direct anti-infective or antiviral properties.

Aspirin acts as an analgesic by reducing pain and inflammation by blocking the production of prostaglandins, which are chemicals involved in the pain and inflammatory response. It also acts as an antipyretic by inhibiting the production of prostaglandins in the hypothalamus, helping to lower fever. Additionally, aspirin has anti-inflammatory properties by inhibiting enzymes called cyclooxygenases (COX), which are involved in the production of prostaglandins. However, aspirin is not considered an anti-infective or antiviral medication, as it does not directly target or kill microorganisms or viruses.

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Taking into account the definition of molarity,  the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liters}\).

In this case, you have:

Replacing in the definition of molarity:

\(Molarity=\frac{30 moles }{0.80 L}\)

Solving:

Molarity= 37.5 \(\frac{moles}{liters}\)

Finally, the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).

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Atoms bond to reach a lower energy state. That is to say, the atoms that are loose are not stable and for this reason they unite forming the compounds and in this way they gain stability.

A chemical bond occurs when atoms share electrons.

A covalent bond is a force that joins two atoms of non-metals.

If you have Br_{2}

Atoms of the same element participate and have a bond.

Given its electronic configuration:

\( \sf1s {}^{2} \: \: 2 {s}^{2} \: \: 2 {p}^{6} \: \: 3 {s}^{2} \: \: 3 {p}^{6} \: \: {4s {}^{2}} \: \: {3 {d}^{10 \: } \: \: {4 {p}^{5}} }\)

Adding the electrons of the energy sublevel indicates that bromine (Br) has 7 electrons in its last energy shell.

And that it lacks an electron to comply with the OCTET RULE (this indicates that incomplete atoms try to complete the electrons by forming chemical bonds).

But when joining both would be sharing an electron, thus completing its octet. Through this transfer of electrons where one of the atoms gives up electrons and the other accepts them, to have the same electronic configuration of the closest noble gas in the periodic table (in this case to Krypton).

Explanation:

Hydrolysis of salt is a reaction in which one of the ions from a salt reacts with water,forming either an acid or basic.

Answer:

E

Explanation:

A combination reaction is one in which two elements or two compounds react to give a new single compound

Hence, what we are expecting on the reactant side is only a single product and not a mixture of products

For the first reaction, we had two elements giving a single product

For the second reaction, we had same

For the third, we had same

For the fourth, we had two compounds reacting to give a singe new product

While in the last, we had two different products which means it does not follow the definition of a combination reaction and that makes it our answer

Hydra, a type of cnidarian, have equal survival rates through life because they are equally fit at all stages. Hydra are an example of an organism with a type I survivorship curve. Thus, the correct option is b. II.

Differences between how energy moves through an ecosystem compared to how chemicals move through the ecosystem. The fundamental difference between how energy moves through an ecosystem compared to how chemicals move through the ecosystem is that energy can not be recycled. Energy is obtained from the sun and is stored in organic molecules, and it flows through an ecosystem through metabolic processes. However, the number of chemicals like carbon, oxygen, nitrogen, water, and phosphorus remains constant in an ecosystem.

Tropical rainforest soils are usually nutrient-poor and low in organic matter. Therefore, option c. nutrient-poor and low in organic matter is the correct answer. The soil in the tropical rainforest is nutrient-poor because heavy rainfall washes away the nutrients, and the soil contains a high level of aluminum and iron, which are toxic to plants. Due to these reasons, there is slow decomposition of organic matter that makes the soil low in organic matter.

Thus, the correct option is b.

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We find that the ultimate BOD is approximately 476 mg/L. Therefore, the correct answer is (c) 476 mg/L.

To determine the ultimate BOD (Biochemical Oxygen Demand) of the wastewater sample, we can use the following formula:

Ultimate BOD = BOD5 / (1 - e^(-k * 5))

where BOD5 is the initial BOD value (225 mg/L), k is the BOD rate constant (0.15 day^(-1)), and e is the base of the natural logarithm (approximately 2.71828).

Ultimate BOD = 225 / (1 - e^(-0.15 * 5))

After solving this equation, we find that the ultimate BOD is approximately 476 mg/L. Therefore, the correct answer is (c) 476 mg/L.

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The theoretical molality of the sodium chloride solution is 0.926 mol/kg.

Steps are:

1. Convert the mass of sodium chloride to moles.
The molar mass of sodium chloride (NaCl) is 58.44 g/mol.
moles of NaCl = (mass of NaCl) / (molar mass of NaCl)
moles of NaCl = 1.18 g / 58.44 g/mol = 0.0202 mol

2. Convert the volume of water to mass.
Assume that the density of water is 1 g/mL.
mass of water = (volume of water) × (density of water)
mass of water = 21.8 mL × 1 g/mL = 21.8 g

3. Convert the mass of water to kilograms.
mass of water in kg = mass of water in g / 1000
mass of water in kg = 21.8 g / 1000 = 0.0218 kg

4. Calculate the molality.
molality = moles of solute / mass of solvent (in kg)
molality = 0.0202 mol / 0.0218 kg = 0.926 mol/kg

The theoretical molality of the sodium chloride solution is 0.926 mol/kg.

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Answer: A 13.88 mL of the concentrated acid would be required to make 250. mL of a 1.00 M \(H_{2}SO_{4}\) solution.

Explanation:

Given: \(M_{1}\) = 18.0 M,     \(V_{1}\) = ?

\(M_{2}\) = 1.00 M,         \(V_{2}\) = 250 mL

Formula used to calculate the volume of concentrated acid is as follows.

\(M_{1}V_{1} = M_{2}V_{2}\)

Substitute the values into above formula as follows.

\(M_{1}V_{1} = M_{2}V_{2}\\18.0 M \times V_{1} = 1.00 M \times 250 mL\\V_{1} = \frac{1.00 M \times 250 mL}{18.0 M}\\= 13.88 mL\)

Thus, we can conclude that 13.88 mL of the concentrated acid would be required to make 250. mL of a 1.00 M \(H_{2}SO_{4}\) solution.

d. 84% is the percent composition of Carbon, in, C₇H₁₆

% composition is quite straightforward. You can determine by mass how much of each element is contained in a compound using its percent composition. A chemical compound is created when two or more components are combined.

The hydrocarbon includes 80% carbon, which translates to 80% of the molar mass being made up of carbon. Consequently, the hydrocarbon has four carbon atoms.

The percent composition is calculated by multiplying the total mass or quantity of an element present in a molecule or compound by the molecular mass of the compound.

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Granola is a heterogeneous mixture.

Heterogeneous mixture is a mixture that does not resemble the uniform mixture and the mixture appears non-uniform.

Granola is a heterogeneous mixture in which Oats, nuts, honey, or other sweetener including brown sugar are commonly incorporated to make granola, that is then typically roasted until it is crunchy, toasted, and golden brown. Periodically, raisins will be added.

Since, different individual could be seen hence it is a heterogeneous mixture.

Hence, Granola is a heterogeneous mixture.

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Answer:

A mixture of an element and a compound made of elements are two different types of combinations of matter.

An element is a substance that cannot be broken down into simpler substances by chemical means. Atoms are the smallest units of elements that still retain their properties. For example, gold is an element with the symbol Au, and its atoms cannot be broken down into simpler substances without losing their properties.

A compound, on the other hand, is a substance made up of two or more different elements chemically combined in a fixed ratio. For example, water is a compound made up of two hydrogen atoms and one oxygen atom, with the chemical formula H2O.

A mixture of an element and a compound is a combination of two or more substances that are physically mixed together, but not chemically combined. The substances in the mixture retain their individual properties and can be separated by physical means, such as filtering or evaporation. For example, a mixture of salt (a compound) and iron filings (an element) can be physically separated by using a magnet to attract the iron filings, leaving the salt behind.

In summary, the difference between a mixture of an element and a compound made of elements is that the former is a physical combination of two or more substances that retain their individual properties, while the latter is a chemical combination of two or more elements in a fixed ratio that results in a new substance with its own distinct properties.

Answer:

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Explanation:

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All the best.

Answer:

False

Explanation:

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

This question is reffering to sedimentary rocks, so it's false.

Answer:

Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth's surface breaks down rocks into small and smaller pieces. When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks.

Explanation:

True

Among all the given options, option d is correct options. Fossil fuels developed from the organic remnants of ancient plants and animals.

Fossil fuels are vital natural resources, as is widely known. They provide significant benefits to humanity, and we depend on them for energy. However, using fossil fuels has drawbacks as well.

Fossil fuels developed from the organic remnants of ancient plants and animals. The heat and pressure of the crust caused Earth to transform these million-year-old leftovers into fuels that include carbon.

The need for energy only increased after the Industrial Revolution. Similar to that, these fuels have had the ability to generate enormous amounts of energy to meet this need.

Therefore, the correct option is option D.

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38 grams of NaCl can dissolve in 100 grams of H2O at 70oC, while 130 grams of CaCl2 can dissolve in 200 ml of H2O at 10oC. Solubility is defined as the amount of solute that can be dissolved in a given amount of solvent at a specific temperature and pressure.

As a result, when calculating solubility, it is important to consider the temperature and amount of solvent used.NaCl is the solute, while H2O is the solvent, in the first scenario. The question asks for the quantity of NaCl that can dissolve in 100 g of H2O at 70oC. The solubility of NaCl in water varies with temperature.

As the temperature increases, the solubility of NaCl in water also increases, allowing more NaCl to dissolve in the same amount of water.At 70oC, the solubility of NaCl in H2O is 38 g/100g of water.

As a result, 38 grams of NaCl can dissolve in 100 grams of H2O at 70oC.In the second scenario, CaCl2 is the solute, and 200 ml of H2O is the solvent. At 10oC, the solubility of CaCl2 in H2O is 74.5 g/100 ml.

As a result, the maximum quantity of CaCl2 that can dissolve in 200 ml of H2O at 10oC is 2 x 74.5 g, which is 149 grams.

However, the question asks for the maximum amount of CaCl2 that can dissolve in 200 ml of H2O at 10oC, which is 130 grams. As a result, this quantity is lower than the maximum solubility of CaCl2 in H2O at 10oC, which is 149 grams. Therefore, 130 grams of CaCl2 can dissolve in 200 ml of H2O at 10oC.

To summarise, 38 grams of NaCl can dissolve in 100 grams of H2O at 70oC, while 130 grams of CaCl2 can dissolve in 200 ml of H2O at 10oC. The quantity of solute that can dissolve in a given amount of solvent is defined as solubility, which varies with temperature. As the temperature rises, the solubility of most substances in water increases, allowing more of them to dissolve in the same amount of water.

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Answer:

studying chemicals containing carbon.

Explanation:

Pure chemistry can be regarded as

branch of science that's based on conduction of basic research so that

personal knowledge can be acquired. It can be reffered to as theoretical branch of chemistry, not applied branch. It comes with curiosity about something, how and why it happens. For instance, studying chemicals containing carbon is to gain knowledge there's no applied chemistry here

Answer:

studying chemicals containing carbon.

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Measurement is a process of finding a number that shows the amount of something.

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Answer:

Temperature will revert to room temperature after the substance reacts fully. Heat energy flows between the chemical bonds of the added substance and water to the surroundings (elsewhere in the water, the beaker, a student's hand that touches the beaker).

Explanation:

Hot packs and cold packs eventually return to room temperature because of thermal equilibrium

Temperature is the degree of hotness or coldness of a body. We have to note that bodies often tend to attain thermal equilibrium with the surroundings. Hence heat flows from or to the body as required.

Hence, the need to attain thermal equilibrium with the  environment is the reason why hot packs and cold packs eventually return to room temperature.

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ANSWER

The initial volume of the acid is 260mL

EXPLANATION

Given that;

The final volume of the ethanoic acid is 4.5L

The final concentration of the ethanoic acid is 1.0 mol/L

The initial concentration of the ethanoic acid is 17.4 mol/L

Follow the steps below to find the volume of the ethanoic acid

Step 1; Apply the dilution formula

Step 2; Substitute the given data into the formula

Therefore, the initial volume of the acid is 260mL

An orange falls off of a display at a store and rolls 5 meters in 2.5 seconds the average speed of the orange will be 2 meters per second.

Speed if the rate of change of position of an object in a given time of interval or per unit time of interval and it is the ratio of distance traveled to the time taken and the unit will be meter per second.

The average speed of the orange will be if the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds,

               Speed = distance / time

Substituting the value,

    speed =5 meters /2.5 seconds

    speed = 2 meters per second.

Therefore, the average speed of the orange will be 2 meters per second if, the orange falls off of a display at a store and rolls 5 meters in 2.5 seconds.

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The compound is polar and the compound is T shaped.

We know that the Lewis structure of a compound tells us the way that electrons are arranged around a central atom in a compound. We can see that the Lewis structure would consist of the central atom and then the atoms that are surrounding the central atom of the molecule.

In any case, the valence electrons that surround each of the atoms in the compound would be shown as dots and they would surround the symbol of the elements to  which the atoms belong. We can now look up at the structure and be able to deduce what the compound can be able to look like.

The compound as shown is polar because of the fact that he compound is non symmetrical.

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