An apple placed in a sealed
container has a mass of 160
grams. What would the mass of
the apple be after 6 weeks of
decomposition?
A. 160 grams
B. 80 grams
C. 40 grams

If a beaker of tetrahydrofuran is put inside a sealed tank containing tetrahydrofuran gas at 63 degrees Celsius and 810 torr, after ten minutes, the liquid in the beaker will evaporate and the amount of liquid in the beaker will decrease.

This is due to the fact that at a higher temperature and pressure, the vapour pressure of the liquid tetrahydrofuran in the beaker will increase, which means that more molecules of tetrahydrofuran will escape from the liquid phase into the gas phase. This process is known as evaporation. As more molecules of tetrahydrofuran evaporate from the liquid in the beaker, the amount of liquid in the beaker will decrease.

The pressure inside the tank is 810 torr and this pressure is greater than the vapour pressure of tetrahydrofuran at 63 degrees C, meaning that the vapour pressure of the liquid tetrahydrofuran will be less than the pressure inside the tank, it will escape to the gas phase, therefore the amount of liquid in the beaker will decrease.

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When heating the solution to boiling on the hot plate , start by starting and the stabilizing the stir function.

When we heat the solution to boil on the hot plate , it start by starting and the stabilizing the stir function. Then, turn the heat to a medium heat setting to start. If necessary, turn up the heat setting after waiting about ten minutes without seeing boiling.

The safety precautions that  taken when heating the solution to boiling on a hot plate is to take proper inspection of the bottom flask for the cracks, irregularities or any of the imperfection.

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Answer:

A. Avogadro's constant

Explanation:

Avogadro's constant is a conversion factor that converts particle count to moles.  One mole is 6.02x10^23 particles.  The is written as (6.02x10^23 particles)/(1 mole particles.

The correct translation for a pure metal in a chemical equation is as follows: the pure metal is translated into its elemental symbol with no subscripts (option C).

A pure metal is any metal that have not been alloyed with other metallic elements.

This means that pure metals are metals that are not mixed with other metals and are made of only one type of element.

Examples of pure metals are copper, aluminium, gold. In a chemical equation, the pure metals exist as a single element with no subscript attached.

Therefore, it can be said that option C is the correct description of a pure metal.

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The ratio by mass of element ammonia is 14:3. and the ratio by mass of element carbon dioxide is 3:8.

The atomic mass, the quantity of matter possess in an atom of an element. It is represented as a multiple of one-twelfth the mass of the carbon-12 atom.

In the ammonia molecule, nitrogen and hydrogen are always present in the ratio 14:3 by mass, whatever the form in which it is obtained.

In every sample of carbon dioxide, there is 32.0 gram of oxygen is present for each 12.0 gram of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 3:8.

Thus, The ratio by mass of element ammonia is 14:3. and the ratio by mass of element carbon dioxide is 3:8.

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Your question is incomplete, most probably your question was

Mention the elements and the ratio by mass of elements present in:

Ammonia & Carbon dioxide

78.3 Torr would be the vapor pressure of a mixture of 80 g of ethanol and 97 g of methanol at 293 k

This question can be answered using Raoult's law and Dalton's law of partial pressure.

Raoult's law: Raoult postulated a mathematical relation between partial pressure and mole fraction. This connection is known as Raoult's Law, which asserts that the partial vapour pressure of each volatile component in a solution (obtained by dissolving a solute in a solvent) is directly proportionate to its mole fraction. The formula can be given by:

p₁= p₁⁰x₁        p₂=p₂⁰x₂

Here x denotes the mole fraction

p⁰ denotes the pressure in pure state.

Dalton's law: Dalton's law of partial pressure states that a gas mixture's total pressure is equal to the sum of its component gases' partial pressures. The pressure that each gas would produce if it filled the same volume of the mixture by itself at the same temperature is known as the partial pressure.

Mathematically,

p= p₁ + p₂

here p is the total pressure.

Now according to the given question

given mass of ethanol= 80 gm

moar mass of ethanol= 46 gm/mol

no. of moles= [tex]\frac{given mass}{molar mass} = \frac{80}{46} = 1.7 moles[/tex]

given mass of methanol= 97gm

molar mass of methanol= 32 gm/mol

no. of moles= [tex]\frac{given mass}{molar mass} = \frac{97}{32} = 3 moles[/tex] (approx.)

total number of moles= 1.7+3= 4.7 moles

mole fraction x for ethanol= [tex]\frac{1.7}{4.7} =0.36[/tex]

mole fraction of methanol= 1-0.36= 0.64

given pressure of ethanol in pure state= 97.7 Torr

given pressure of methanol in pure state= 44.6 Torr

Now from dalton's ;aw

total pressure is the sum of product of partial fraction and pressure in pure state for individual liquids.

P(total)= 0.36×44.6+ 0.64× 97.7= 78.3 Torr

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If  the vapor pressure of pure methanol at 50 °c is 400 torr. The change in vapor pressure of a solution made from 23.5 g of glycerin in 130 g of methanol at 50 °C  is 24 torr.

The vapor pressure is given as :

p = x1 p°1

The lowering in vapor pressure :

Δp = p°1 - p1

     = p°1 - x1p°1

    = p°1 ( 1 - x1)

Δp = x2 p°1

Moles of glycerin = 23.5 / 92

                              = 0.255 mol

Moles of methanol = 130 / 32

                                = 4 mol

Total moles = 0.25 + 4

                    = 4.25 mol

Mole fraction , x2 = 0.255 / 4.25

                             = 0.06

Δp = x2 p°1

     = 0.06 × 400 torr

     = 24 torr

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The CH3Cl possesses a net dipole because the C-Cl link is polar, making it polar as well.

A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed.

A polar covalent bond is a bond created by exchanging electrons between two atoms with different electronegativities.

The CH3Cl possesses a net dipole because the C-Cl link is polar, making it polar as well.

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6.07 x 10-2  moles of kf are contained in 347 g of water in a 0. 175 mol kg-1 kf solution

What does the word "molality" mean?

The quantity of a material dissolved in a given mass of solvent is known as its molality (m), also known as molal concentration. The moles of a solute per kilogram of a solvent are how it is defined. The word "molality" is derived from the word "molarity," which refers to a solution's molar concentration.

The mole is the volume of a system that has the same number of atoms in 0.012 kilograms of carbon 12 as there are elementary particles.

The given mass of water, m1 is 347g

Molality, m is 0.175mol/kg

347 g of water is the same as 347 ml  (since 1 ml of water has a mass of 1 gram) which is 0.347 L.

KF is therefore equal to 0.17 * 0.347 i.e. 6.07 x 10-2.

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Accumulation of pollutants at successive levels of the food chain is biomagnification.

What is biomagnification ?

When an organism's primary exposure source is its meal, biomagnification occurs when the chemical concentration in the organism exceeds the concentration in its food.

What is pollutants?

A material that may harm organisms (including people, plants, and animals) or violate environmental quality standards is referred to as a pollutant.

Therefore, accumulation of pollutants at successive levels of the food chain is biomagnification.

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Almost all stoichiometric problems can be resolved in only four easy steps.

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There is no direct conversion from moles to grams. You need to know the molar mass of H3PO4 to calculate the number of grams. The molar mass of H3PO4 is 97.99 g/mol.

What is Molar mass?

Molar mass is the mass of one mole of a given substance, measured in grams per mole (g/mol). It is a unit of measurement used to determine the amount of a substance in a sample. The molar mass of a substance is related to its molecular weight, which is the sum of the atomic weights of all atoms in the molecule.

Therefore, There is no direct conversion from moles to grams.

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From the law of the conservation of mass, there would be  two molecules in the product.

We have to note that from the law of the conservation of mass, the total mass of the system must be constant. This implies that the initial mass of the system must be the same as the final mass of the system.

In this case, we have the reaction between the silver nitrate and the sodium chloride and we can see that the reaction is 1:1 and we have to apply the law of the conservation of mass here to know that there would be two molecules in the product.

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It is not possible to conclude that light carries energy by comparing the temperature of the two thermometers.

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Since the majority of the molecules in this chemical class are created by combining carbon and water, the term "carbohydrate" derives from this.

Only the domain Eukarya contains multicellular, visible organisms like humans, animals, plants, and trees. Many microorganisms, including fungi, algae, and micro-animals, inhabit this region as well. Viruses are nonliving agents, hence they are excluded from the major categories of microorganisms. Single-celled or multicellular eukaryotic creatures are both possible.

There are three domains: Archaea, Bacteria, and Eukarya. Prokaryotic organisms fall under the domains Archaea or Bacteria, while eukaryotic organisms fall under the category Eukarya. Archaea. In terms of size and structure, archaea resemble bacteria but have a greater range of cell forms.A domain, also known as a dominion, superkingdom, realm, or empire, is the highest taxonomic rank that may be assigned to an entire group of organisms in biological taxonomy.

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Neon lights and fireworks are both types of light sources that produce bright and colorful displays. However, the main difference between them is that neon lights are a continuous source of light, whereas fireworks are a transient source of light.

Neon lights produce light through the process of gas discharge, where an electric current is passed through a gas-filled tube, causing the gas to emit light. The light is produced by the excitation of atoms within the gas, which then release photons as they return to their ground state.

Fireworks, on the other hand, produce light through a chemical reaction, where a mixture of chemicals is ignited, producing a burst of light and color.

The light is produced by the energy released during the chemical reactions, which excites the atoms and molecules within the fireworks, causing them to emit light. The main difference is that neon lights rely on a continuous energy source while fireworks rely on a chemical reaction.

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Correctly paraphrased question:

What similarities and differences can you identify between neon signs and fireworks? What might be happening at the atomic level ti explain the difference?

Answer: 2500J

Explanation: The formula of Kinetic Energy is 1/2mv^2

where m = mass of an object

            v = velocity of an object

Therefore, Kinetic energy = 1/2*500*(5)^2

                                              = 2500/2

                                              = 1250 J

The question must be What is the kinetic energy of an object of mass 500kg and velocity 5m/s^2 ?

The inorganic substance with the chemical formula BaSO4 is barium sulfate (or sulphate). It is a tasteless, crystalline white substance that is insoluble in water.

A barium cation and a sulfate anion are the two elements that make up barium sulfate. There are four oxygen atoms joined to the sulfur. A sulfate salt of barium, known as BaSO4, is present in the mineral barite. It is a white crystalline substance that is soluble in strong acids but insoluble in water and alcohol.

Elements include both barium and bromine. Barium is a metal belonging to Group 2 of the modern periodic table, and bromine is a non-metal belonging to Group 17 (halogen).

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Synthetic materials are material that can be made by chemical process instead of being extracted from a natural resource.

Define chemical process.

An effective way to modify one or more chemicals or chemical compounds is through a chemical process. Such a chemical process involves a chemical reaction of some kind and can happen naturally or be triggered by an external factor.

A synthetic material is one in which the components are purposefully combined to create a substance with various properties. While most synthetic materials are the consequence of chemical processes, some are created from combinations. Synthetic fibers, ceramics, polymers, artificial foods, artificial pharmaceuticals, and composites are a few examples of synthetic materials. Flexible synthetic fibers are available. They can be utilized to create apparel and other items. The synthetic fibers nylon, polyester, and rayon are some examples.

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Answer:

  0.0135 moles

Explanation:

You want to know the number of moles of gas in a 0.325 L container at 1.00 atm and 293 K.

The ideal gas law is ...

  PV = nRT

Solving for n, the number of moles can be found as ...

  n = PV/(RT)

  n = (101.325 kPa)(0.325 L)/(8.3145 L·kPa/(K·mol)·293 K) ≈ 0.0135 mol

The container can hold 0.0135 moles of gas.

__

Additional comment

1.00 atm = 101.325 kPa

To calculate velocity,the formula is v = x/t. Average velocity is total change in displacement divided by total change in time. v = dx/dt is the formula for instantaneous velocity.

Velocity is defined as a vector measurement of the rate and direction of motion. Put simply, velocity is the speed at which something moves in one direction. The speed of a car traveling north on a major freeway and the speed a rocket launching into space can both be measured using velocity.

As you might have guessed, the scalar (absolute value) magnitude of the velocity vector is the speed of motion. In calculus terms, velocity is the first derivative of position with respect to time. You can calculate velocity by using a simple formula that includes rate, distance, and time.

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The primary fate of the hydrogen atoms in the oxidation of glucose is reaching oxidation state I in water after going from oxidation state 0 in H2.

In essence, glycolysis splits a 6-carbon glucose molecule into two 3-carbon pyruvate molecules. NAD+ is involved in the process and captures hydrogen atoms and electrons. Any energy released will either be retained as ATP or NADH, or it will be expelled as heat.

When glucose and molecule of oxygen interact, carbon dioxide and water are created. Glucose's carbon atoms undergo oxidation. In other words, they lose an electron and go to a more oxidized state. In molecular oxygen, the oxygen atoms undergo reduction.

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The principle of faunal succession is a key concept in the study of prehistoric life and the age of sedimentary rocks. It is based on the idea that the fossilized remains of different species of animals and plants found in sedimentary rocks can be used to infer the relative age of the rocks and the conditions that existed when they were formed.

The principle of faunal succession states that over time, the species of animals and plants that lived in a particular area changed and evolved. As a result, the fossilized remains of different species found in sedimentary rocks can be used to infer the relative age of the rocks.

This principle is based on the idea that the fossil record is a record of the evolution of life on Earth. In addition, the principle of faunal succession also provides insight into the ancient environment and climate. For example, the presence of certain types of fossils, such as coral reefs or tropical plants, may indicate that the area was once a warm, shallow sea.

In all, the principle of faunal succession is a powerful tool that connects prehistoric life to the age of sedimentary rocks. By studying the fossilized remains of different species found in sedimentary rocks, scientists can infer the relative age of the rocks and the conditions that existed when they were formed.

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There are 45g in 2. 5 moles of H2O

The "counting unit" used by chemists to describe the quantity of atoms, ions, molecules, or formula units in a specific chemical sample is called a mole. The mole is comparable to other counting units you have employed in the past, such as pair (2), dozen (12), and gross (144). Avogadro's number (6.022 x 10₂₃) of molecules (or formula units) make up one mole of a substance (ionic compound).

The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the amount of grams per mole of a substance, to put it another way. Therefore, grams/mole are the units for molar mass. so to find mass of compoud you need to multiplying the moles to the mass molar

mass = moles x mass molar

mas 2.5 moles of water (H₂O) = 2.5 moles ×(2+16)g/ moles

mas 2.5 moles of water (H₂O) =45g

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2.0 moles of H2O contain 2.0 x Avogadro's number of molecules, which is 6.022 x 10^23 molecules.

This is because represents the number of atoms or molecules in one mole of a substance. In one mole of any substance 6.022 × 10²³ particles of that substances are present, which is also known as Avogadro's number. So, in 2 moles of H₂O = 2(6.022 × 10²³) = 12.044 × 10²³ molecules will present. Therefore, multiplying Avogadro's number by the number of moles of a substance gives the number of atoms or molecules present in that substance. In this case, 2.0 moles of H2O contain 2.0 x 6.022 x 10^23 = 1.204 x 10^24 molecules.

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Answer:

Remove/Add an electrons

Explanation:

Some chemicals find full octets more stable and strive to become one, so when you remove lone pairs you made the stucture more stable for instance. Or perhaps you add another element, for instance OH is stable but H₂O is VERY stable.

Explanation:

The maximum amount of water you can put in the metal box is 30996 cm^3 before it freeze and overflow

The cycle of citric acid Hydrogen atoms are transported to FAD during the conversion of succinate to fumarate. This process is catalyzed by a succinate dehydrogenase enzyme.

During the process of succinate dehydrogenation, succinate is oxidized to fumarate by losing electrons, which are transferred to FAD, reducing it to FADH2. This transfer of electrons from succinate to FAD is an oxidation-reduction reaction, also known as redox reaction. The energy released during this reaction is harnessed to generate ATP, which is an important energy currency for the cell. Succinate dehydrogenase is an enzyme complex that contains multiple subunits and cofactors, including flavin adenine dinucleotide (FAD) and iron-sulfur clusters. It is located in the inner mitochondrial membrane, which allows it to transfer electrons to the electron transport chain, leading to the production of ATP. It's important to note that the citric acid cycle is a crucial metabolic pathway that takes place in the mitochondria of eukaryotic cells, and it is also known as the TCA cycle or Krebs cycle. The cycle is a series of chemical reactions that converts acetyl-CoA, derived from carbohydrates, fats, and proteins, into carbon dioxide and water, releasing energy in the form of ATP, hydrogen atoms other high-energy molecules.

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The Balanced Chemical Equation is: Na2SO3(aq)+2HCl(aq)→H2SO3(aq)+2NaCl(aq)

What is an Equivalent point?

In an acid-base reaction, the equivalence point is when chemically equal amounts of acid and base are mixed. This is a general reaction pathway that produces a specific acid/base or salt from a mixture of other acids and bases.

This is a mixed acid-base reaction up to the equivalence point.

Aqueous Sulfurous Acid: H2SO3(aq)

Aqueous Hydrochloric Acid: NaCl(aq)

Aqueous Sodium Sulfite: Na2SO3(aq)

Aqueous Hydrochloric Acid: HCl(aq)

Therefore, the balanced formula is:

Na2SO3(aq)+2HCl(aq)→H2SO3(aq)+2NaCl(aq)

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Answer: 16 Nm

Explanation: Work is measured as Force times Displacement . Therefore , 160N X 0.1m = 16 Nm