The nonvolatile compound ethylene glycol, C2H6O2, forms nearly ideal solutions with water. What is the vapor pressure of a solution made from 1.00 mole of C2H6O2 and 9.00 moles of H2O if the vapor pressure of pure water at the same temperature is 25.0 mm Hg

Answer:

physics, including the laws of gravity

Explanation:

we need to look at the chemical formula for lithium sulfide (Li2S). This formula tells us that in one molecule of Li2S, .

In order to determine how many grams of lithium will combine with 20 grams of sulfur, we need to find the molar ratio between lithium and sulfur in Li2S. This ratio is determined by the atomic masses of lithium and sulfur.

The atomic mass of lithium is approximately 6.94 grams per mole, while the atomic mass of sulfur is approximately 32.07 grams per mole.Using these atomic masses, we can calculate the molar ratio between lithium and sulfur as follows:

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The description of the copper sulphate is mentioned below.

What is Copper Sulfate?

Copper sulfate can seriously irritate the eyes. It is also used as an antibacterial and molluscicide. Consuming excessive amounts of copper sulfate can cause nausea, vomiting, and harm to the liver, kidneys, blood cells, and other body parts. Shock and even death might result from excessive exposures.

What is minerals?

A naturally occurring inorganic substance or element with an. crystal form, physical properties, and characteristic chemical composition with an ordered internal structure. Rocks are naturally occurring solids made up of one or more minerals, whereas minerals are different.

Therefore, description of the copper sulphate is mentioned above.

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The difference in properties between the reactants (calcium and chlorine) and the product (calcium chloride) can be explained by considering the bonding and structure of the substances involved.

Calcium is a metal, while chlorine is a nonmetal. In the reaction between calcium and chlorine gas, calcium donates two electrons to chlorine, resulting in the formation of calcium chloride (CaCl2). This process involves the formation of ionic bonds.

Calcium chloride has a different structure and bonding compared to its reactants. In the solid state, calcium chloride forms a crystal lattice structure composed of alternating calcium cations (Ca2+) and chloride anions (Cl-). This ionic bonding arrangement leads to strong electrostatic attractions between the oppositely charged ions.

The properties mentioned in Figure 9 can be explained based on this structure and bonding:

Ability to Conduct Electricity: Calcium chloride, when dissolved in water or in its molten state, can conduct electricity. This is because the ions in calcium chloride are free to move and carry electric charge, facilitating the flow of electricity. In contrast, solid calcium and chlorine do not conduct electricity well as they do not have freely mobile charged particles.

Relative Melting Point: Calcium chloride has a high melting point compared to chlorine. This is due to the strong ionic bonds between calcium and chloride ions in the crystal lattice, requiring significant energy to break those bonds and transition from a solid to a liquid state. Chlorine, being a nonmetal, has weaker intermolecular forces, resulting in a lower melting point.

Based on the differences in bonding and structure, the properties of the product (calcium chloride) differ from those of the reactants (calcium and chlorine), particularly in terms of electrical conductivity and melting point.

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The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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Answer:

1. 7.227x10²⁴ O atoms

2. 0.1944 mol

3. 3.18x10²³ atoms

Explanation:

1. To solve this problem we need to use Avogadro's number, which states the number of molecules that are in 1 mol of a substance:

There are 3 O atoms per NaNO₃ molecule, thus the answer is (3* 2.409x10²⁴) 7.227x10²⁴ atoms.

2. First we convert 10.5 g of N₂O₅ into moles, using its molar mass:

There are 2 N moles per N₂O₅ mol, thus the answer is (2*0.0972) 0.1944 mol.

3. First we convert grams into moles:

Then we use Avogadro's number:

There are 14 O atoms per Fe(H₂O)₂(SO₄)₃ molecule, so the answer is (7.95x10²² * 4) 3.18x10²³ atoms.

The agricultural practices that results in methane emission is manure management. That is option C.

Methane gas emission is defined as the release of large quantities of methane gas into the atmospheric region of the earth by production and transport of coal, natural gas, and oil, livestock and other agricultural practices, land use and by the decay of organic waste in municipal solid waste landfills.

The negative effects of the continuous emission of methane gas into the atmosphere would lead to global warming as it is one of the major greenhouse gases.

Manure management is one of the agricultural practices that can lead to the emission of methane gases.

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Answer:

runoff is he draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc.

Explanation:

A chemical equation that is balanced has the same number of each type of atom on both sides of the equation.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same total charge and the same number of atoms for each component in the reaction. In other words, both sides of the reaction have equal amounts of mass and charge.

Chemical equations known as ionic equations solely display the ions involved in a chemical reaction. Or, the ions that combine in a solution to react and create new compounds. The ions that don't take part are referred to as spectator ions.

A chemical equation known as a net ionic equation only includes the ions that are undergoing chemical changes as the reaction progresses.

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Answer :Matter makes up everything visible in the known universe, from porta-potties to supernovas. And because matter is never created or destroyed, it cycles through our world. Atoms that were in a dinosaur millions of years ago—and in a star billions of years before that—may be inside you today.     To form water, however, hydrogen and oxygen atoms must undergo chemical changes. For a chemical change to occur, atoms must either break bonds and/or form bonds. The addition or subtraction of matomic bonds changes the chemical properties of the substances involved. Both hydrogen and oxygen are diatomic—they exist naturally as bonded pairs (H2 and O2, respectively). In the right conditions, and with enough energy, these diatomic bonds will break and the atoms will join to form H2O (water). Chemists write out this chemical reaction as:

2H2 + O2 → 2H2O

This equation says that it takes two molecules of hydrogen and one molecule of oxygen to form two molecules of water. Notice that there are the same number of hydrogen atoms and oxygen atoms on either side of the equation. In chemical changes, just as in physical changes, matter is conserved. The difference in this case is that the substances before and after the change have different physical and chemical properties. Hydrogen and oxygen are gases at standard temperature and pressure, whereas water is a colorless, odorless liquid.  

Ecosystems have many chemical and physical changes happening all at once, and matter is conserved in each and every one—no exceptions. Consider a stream flowing through a canyon—how many chemical and physical changes are happening at any given moment?

First, let’s consider the water. For many canyon streams, the water comes from higher elevations and originates as snow. Of course that’s not where the water began—it’s been cycled all over the world since Earth first had water. But in the context of the canyon stream, it began in the mountains as snow. The snow must undergo a physical change—melting—to join the stream. As the liquid water flows through the canyon, it may evaporate (another physical change) into water vapor. Water gives a very clear example of how matter cycles through our world, frequently changing form but never disappearing.

Light energy allows these bonds to break and reform to produce sugar and oxygen, as shown in the chemical equation for photosynthesis:

6CO2 + 6H2O + light → C6H12O6 (sugar)+ 6O2  

This equation says that six carbon dioxide molecules combine with six water molecules to form one sugar molecule and six molecules of oxygen. If you added up all the carbon, hydrogen, and oxygen atoms on either side of the equation, the sums would be equal; matter is conserved in this chemical change.

When animals in and around the stream eat these plants, their bodies use the stored chemical energy to power their cells and move around. They use the nutrients in their food to grow and repair their bodies—the atoms for new cells must come from somewhere. Any food that enters an animal’s body must either leave its body or become part of it; no atoms are destroyed or created.

Matter is also conserved during physical and chemical changes in the rock cycle. As a stream carves deeper into a canyon, the rocks of the canyon floor don’t disappear. They’re eroded by the stream and carried off in small bits called sediments. These sediments may settle at the bottom of a lake or pond at the end of the stream, building up in layers over time. The weight of each additional layer compacts the layers beneath it, eventually adding so much pressure that new sedimentary rock forms. This is a physical change for the rock, but with the right conditions the rock may chemically change too. In either case, the matter in the rock is conserved.

The bottom line is: Matter cycles through the universe in many different forms. In any physical or chemical change, matter doesn’t appear or disappear. Atoms created in the stars (a very, very long time ago) make up every living and nonliving thing on Earth—even you. It’s impossible to know how far and through what forms your atoms traveled to make you. And it’s impossible to know where they will end up next.  This isn’t the whole story of matter, however, it’s the story of visible matter. Scientists have learned that about 25 percent of the universe’s mass consists of dark matter—matter that cannot be seen but can be detected through its gravitational effects. The exact nature of dark matter has yet to be determined. Another 70 percent of the universe is an even more mysterious component called dark energy, which acts counter to gravity. So “normal” matter makes up, at most, five percent of the universe.

Explanation:

Answer:

N₂O₄

Explanation:

There is the formula

If two molecules of palmitic acid enter the beta-oxidation then it generates a total of 8 acetyl-CoA molecules, 7 NADH molecules and 7 FADH2 molecules.

The fatty acid with the most common structure, palmitic acid, has sixteen carbon atoms but no carbon-carbon double bonds. A total of seven cycles of beta oxidation are required to fully degrade the fatty acid. Thus, a total of 8 acetyl-CoA, 7 NADH, and 7 FADH2 molecules are produced.

By going through the oxidation system seven times, palmitoyl-CoA produces eight acetyl-CoA molecules and fourteen pairs of hydrogen atoms. Acetyl-CoA has three possible uses: it can be oxidized in the TCA cycle, utilized to synthesise fatty acids or cholesterol, or utilized in the liver to produce ketone bodies.

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Invented by Bernard Launy and Jeremie Metz, flaws in the system in terms of energy inputs and outputs is the overbalanced wheel in which spokes are attached

Energy is the ability to do work to cause changes in matter

The overbalanced wheel perpetual motion machine is one of the most commonly proposed perpetual motion machine designed and wheel is designed to turn clockwise just after the weighted spoke reaches the top of the wheel and the spoke flip outward to the right exerting the force downward toward the ground and some energy will be lost from friction as the mechanism rub on the inner spoke and more energy will be lost when it transferred into sound and thermal energy

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A mass of 48.5 g of a certain substance can be dissolved in 29.1 ml of water at 20° C, the solubility of this substance is 1.67 g.

We know that, Density of water = 1 g / mL

                                                    = 29.1 mL x 1 g

                                                    =  29.1 g water

Solubility = (Mass of solute / Mass of solvent) × 100

               = ( 48.5 g / 29.1 g ) × 100

               = 167 g

Here, Solubility of substance is 167 g per 100 gm of water

So, 167 × 1 / 100 = 1.67 g of the substance can be dissolved per gram of water.

Thus, 1.67 g of the substance can be dissolved per gram of water.

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The magnesium and the powder produced by burning it is an Element, compound.

A burning magnesium ribbon produces light of sufficient intensity to cause temporary vision loss. Do not look directly into the light source. Burning magnesium in the air produces intense heat that can cause burns and ignite combustible materials. When magnesium reacts with oxygen it emits a bright light that can temporarily blind you.

Magnesium burns very brightly because the reaction releases a lot of heat. As a result of this exothermic reaction, magnesium donates two electrons to oxygen-producing powdered magnesium oxide. Combustion of magnesium ribbon in the air is a chemical change for the following reasons: It is an irreversible change because once the ribbon burns it cannot be reignited. A new product with new properties is created.

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Answer:

Yes it is reversible for the reaction.

Answer: Emily can measure the density of the piece of metal to find out what it is. Density is a physical property.

Explanation:

The density of a substance can be found by dividing its mass by its volume. No chemical reaction is involved in measuring the mass nor the volume; therefore, density is a physical property.

Answer:

The answer is C. Plasma

Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.

Answer:

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.

Explanation:

Answer:

Explanation:

b

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Answer:

1mpm(1 meters per minute) Explanation: Speed:Distance/time 25/25=1 plz mark as brainliest

Answer:

1mpm(1 meters per minute)

Answer:

Love it because Love it

Explanation:

Answer:

The amount of water

The amount of sugar and

The amount of yeast

Explanation:

A constant variable is that variable in an experiment which must be kept the same for all groups in order not to alter the results of the experiment.

In this question, the independent variable i.e. the variable being manipulated is the TYPE OF SUGAR USED while the dependent variable i.e. variable that responds to change is AMOUNT OF ENERGY. Three different types of sugar were used viz: maltose, glucose, and sucrose. To not alter the outcome of the experiment, the constants of this experiment i.e. variables that must be the same for all groups of the experiment, include the following:

- The amount of water

- The amount of sugar

- The amount of yeast used

The mass of Tin in alloy = 50 g

Given

10% tin, 16% antimony, and 74% lead.

mass of alloy = 500 g

Required

grams of tin

Solution

The mass percent of each component of the mixture shows the mass ratio of each component

%tin in alloy = 10%, so mass of tin :

\(\tt 10\%\times 500~g=50~g\)

Answer:

February 12th.

Explanation:

Trust me.

To solve this, we must know the formula for mass defect. Protons and neutrons are the nucleons at play here. Therefore,  the mass defect of the nucleus of thorium-232 is 1.911384 amu.

The difference or disparity between the mass of the nucleus and the mass of the nucleons is known as a mass defect.

mass of protons = 1.6727 x 10⁻²⁴ g

                           = 1.007316 amu

mass of neutrons= 1.6750 x  10⁻²⁴  g

                           = 1.008701 amu

mass of Thorium= 234 g/mol

                            = 234 amu

In thorium -232

protons = 90

neutrons = 144

mass defect = mass of protons×90 + mass of neutrons ×144 - 234

mass defect = 1.911384 amu

Therefore,  the mass defect of the nucleus of thorium-232 is 1.911384 amu.

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