The molar mass of CCl4 is 153. 81 g/mol How many grams of CCl4 are needed to have 5. 000 mol?​

Before we use our imaginations to try and think of a fitting room, let's take a look at what a chloroplast is.

A chloroplast is the organelle in plant-based cells responsible for energy production. Through photosynthesis (you've probably heard of this before!), they use sunlight to create energy for the plant to function.

Since the chloroplast is the energy-maker for the cell, we need to imagine a room in a house that does something like this. There's a couple things that come to my mind. Firstly, although they don't really count as rooms, something like solar panels would probably make the most sense here. Since the answer asks for a room, though, solar panels don't work.

Maybe a kitchen? The kitchen is the room where food is created, supplying energy to all the inhabitants of a house.

I hope this helped! Learning about the components of cells is a little complicated at the start, but it's definitely a very exciting topic that only gets more and more interesting the deeper you delve into it.

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A smaller amount of energy is wasted by the incandescent bulb.

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B) Rubidium is a highly reactive element.

Rubidium is a highly reactive element due to its low ionization energy, which makes it easily lose electrons and form compounds. It is considered to be one of the most reactive alkali metals.

When it comes into contact with water or air making rubidium is highly flammable. It can ignite spontaneously in the air and reacts violently with water to produce rubidium hydroxide and hydrogen gas.

Being noticeably more reactive than potassium but less so than cesium, it is likely to react with substances that are dangerous with sodium or potassium more forcefully. When rubidium is exposed to air or dry oxygen, it ignites, mostly generating oxide.

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the element that was reduced in this redox reaction is Fe

A redox reaction, also known as an oxidation-reduction or redox reaction, involves the exchange of electrons between chemical entities (the atoms, ions, or molecules involved in the reaction). Redox reactions occur everywhere; they are involved in the burning of fuels, the rusting of metals, and even the processes of photosynthesis and cellular respiration.Some species experience oxidation, or the loss of electrons, while others experience reduction, or the gain of electrons, during a redox process. Take rust, which results from the interaction of iron and oxygen:The third selection from the options presented above is the right response. The element that was reduced in the described redox reaction was Fe, or iron. It now has a neutral charge after having its +3 charge lowered.

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Among the following alkenes (D) IV cannot be converted into an alkyne by reacting it with bromine followed by an excess of sodium amide and then with water.

An alkene must first be brominated by an addition reaction that produces a vicinal dibromide in order to transform it into an alkyne. All alkenes that have at least one double bond double substituted render them unsuitable for this method due to the requirement of this vicinal dibromide. This is so that the alkane can undergo a double elimination and produce an alkene, which needs at least one C-H and C-X bond. This hinders the conversion of molecule IV into an alkyne.

The dibromo alkane would change into the provided alkene by losing one unit of HBr if it were to react with bromine. However, the second beta-elimination cannot take place since there isn't hydrogen that is physically linked to the alkene carbon. So (D) IV is the right option.

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Since oxygen has a higher electronegative charge than hydrogen, the two bonds that are created will be polar covalent, which means that oxygen.

which has a higher electronegative charge, will have a partial negative charge, and hydrogen, which has a partial positive charge. Each water molecule has a small hydrogen charge that attracts neighboring oxygen atoms and negatively charged areas of other molecules. While holding water together and giving it intriguing features, the hydrogen bond between the hydrogen of one water molecule and the oxygen of another... For water, this is how it functions. Due to the molecule's bent structure, water (H 2 O) is polar. Most of the negative charge from the oxygen is indicated by the shape.

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By using given equation 0.9 moles of CH₄ are required to produce 3.6 moles of HCl.

The transformation of one or more reactants, also known as reactants, into one or more new products, also known as products, occurs during a chemical reaction.

Chemical reactions turn reactants into products by involving reactants in the process. As an illustration, when we breathe, oxygen is inhaled, and upon coming into contact with glucose, it reacts to create carbon dioxide, water, and energy.

Given chemical reaction:

CH₄ + 2 Cl₂ → 4 HCl + C

1 mole of CH₄ gives 4 moles of HCl

x moles of CH₄ gives 3.6 moles

x moles of CH₄ = 3.6/4

x moles of CH₄ = 0.9moles.

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Volume of liquid water  would be approximately 24 million km³.

Volume(V) of ice at 20° is;

                    Vi = 26.8×10⁶ km³

Density is depend upon the mass and volume

∴   p =m/v

where;   p = Density

               m = Mass

                v = Volume

Density of ice p(i) = 0.92g /cm³

Density of water at 4°C is;

             p(w) = 1g/cm³

If ice is melt then,

          mass(m) of water = mass(m) of ice

              p(w) = p(i)

     V = p(i)/p(w)

    0.92g / cm³/1g/cm³×26.8×10⁶ km³

        24.5 ˣ 10⁶ km³

      ≈24 million km³

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The pressure difference required to stop solvent from flowing through a semipermeable membrane is known as the osmotic pressure of a solution.

The molar concentration of the solute particles in solution directly relates to the osmotic pressure of a solution. Because a solution has a higher concentration of a solute than pure water does, water from pure water wants to diffuse or go by osmosis to the solution. Therefore, the osmotic pressure of a solution is always greater than that of pure water or solvent because it is necessary to prevent water from entering the solution. A semipermeable membrane can no longer pass water through it due to osmotic pressure. The osmotic pressure formula can be used to determine this pressure, which in turn inhibits osmosis from taking place.

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The mass % of carbon in dimethyl sulfoxide (C2H6SO) rounded to three significant figure is calculated as 30.718%.

Mass percent of a solution is defined as the ratio of the mass of solute that is present in solution, relative to the mass of solution as a whole. To calculate mass percent of an element in a compound, we divide mass of the element in 1 mole of the compound by the molar mass and then multiply the result by 100.

As we know molar mass of carbon is 12 g/mol and molar mass of dimethyl sulfoxide is 78.13 g/mol

Mass % of carbon (C2) in dimethyl sulfoxide (C2H6SO) = 2* (12/78.13) * 100

= 30.718%

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B) 2, 7, and 8 of the following molecules act as building blocks (monomers) of polypeptides.

You may think of it as several flavors that come together to form lengthy chains that we refer to as polypeptides, which are the fundamental components of proteins.

Peptide bonds bind the amino acids together in polypeptides. The interaction between the -carboxyl and -amino groups of two amino acids results in the formation of a dipeptide.

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Magnesium sulfate, or MgSO₄, weighs 6.68 g, and dissolves about 0. 965 L of the a 0. 0575 M solutions.

A solution is created when a solvent and a solute, two different compounds, are mixed together. When a salt and a solvents is mixed, a solution is created. Commonly, one substance will dissolve in another to create a solution, such as when salt dissolves in water. Nevertheless, a solution can be produced under any state of matter.

Molar mass MgSO₄ = 120.36 g/mol

You have a 0.0575 M solution

That is equal to 6.9207 g/L or 0.0575 mol/L * 120.36 g/mol.

But you want mass in 0.965 L

Mass equals 0.965 L times 6.9207 g/L, or 6.68 g.

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2 ounces of water will be measured using the measuring cup introducing before part A when making the cake.

Both units (that is, ml and ounces) are equal, meaning they measure the same quantity and can be converted to each other.

Given that:

1fluid oz = 29.7ml

Part A measurements are not shown. Therefore, we will explain using hypothetical values.

Let the amount of water measured with the measuring cup in part A be 10 ml.

The equivalent number of ounces (x) is calculated as follows:

1 fluid oz = 29.7ml

x = 10ml

By using equality

x * 29.7ml = 1 fluid oz * 10ml

By canceling common units

x * 29.7 = 10 fluid oz

Divide both sides by 29.7.

x = 0.3367 fluid oz

Approximate to the nearest half.

x = 0.5 fluid oz

This means that the equivalent amount of water is 0.5 ounces.

What if the measurement is 55mL.

We apply the same steps here also:

x fluid oz = 55ml

x *29.7 = 1 fluid oz * 55 ml

Divide both sides by 29.7

x = 2 fluid oz

This means that the equivalent amount of water is 2 ounces.

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Using a method known as water displacement, gases created during laboratory experiments are frequently collected. To obtain the accurate value of the gas's pressure .

The vapor pressure caused by water in a sample can be compensated for. The gas is not pure since it is combined with water vapor from evaporating water because it is gathered above water. By deducting the contribution of the water vapor, one may apply Dalton's law to determine how much of the desired gas is present: P total equals Pg plus PH 2O. The required gas's pressure is P g. Pg = P Total + P H 2 O List the known quantities and make a plan for the issue. pressure in the atmosphere. A water pan is filled with a bottle that has been turned upside down and filled with water. Rubber tubing that is attached to the reaction flask and supplied underneath the water bottle.

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The molarity of a solution of HNO3 if 15.72 mL of the solution neutralize 28.2 mL of 0.100 M H2SO4 solution is 0.89 x 10^-4M

Given the volume of HNO3(V1) = 15.72mL

The volume of H2SO4 (V2) = 28.2mL

concentration of H2SO4 (M2) = 0.100M

Concentration of HNO3  = M1

We know that c = n/v where n is the number of moles.

The moles of H2SO4 (n2) = V2 X M2/1000

n2 = 28.2 x 0.100 /1000 = 28. 2 x 10^-4  

From the reaction: H2SO4 + HNO3 -> NO2+ + HSO4- +H2O

We can see from the equation that the number of moles of HNO3 must be half that number, so: n1 = 28. 2 x 10^-4  /2 = 14.1 x 10^-4

M1 = 14.1 x 10^-4/15.72 = 0.89 x 10^-4M

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According to  the concept of molar mass and stoichiometry, the  mass of copper(II) sulfate  that would remain after removing all the water from 55 g of CuSO₄ · 5 H₂O is 35.18 g.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.

In copper(II) sulfate , 249.68 g of copper (II) sulfate has 90 g water, thus 55 g of copper (II) sulfate will have 55×90/249.68=19.82 g water, so mass of copper sulfate= 55-19.82=35.18 g copper(II) sulfate.

Thus,35.18 g copper(II) sulfate would remain after removing all the water from 55 g of CuSO₄ · 5 H₂O.

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The correct answer is option A. The mass of the sample decreased, so physical changes occurred as the metal first melted and then boiled out of the crucible. The decrease in mass is a result of the metal melting and then vaporizing as it is heated.

Physical changes refer to changes in the physical properties of a substance without altering its chemical composition. Examples of physical changes include melting, freezing, condensation, vaporization, sublimation, and physical state changes. Physical changes occur when a substance changes from one state of matter to another without a chemical reaction taking place.

This is an example of a physical change, as the material is changed from a solid to a liquid and then to a gas, but its chemical composition remains the same.

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The amount of sodium-24 decreases to approximately 125 g.

Sodium is a chemical element with the symbol Na on the periodic table. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metal group of chemical elements.

The graph below shows the amount of 500 g sample of sodium-24 over time. The x-axis of the graph represents time (in hours), and the y-axis represents the amount of sodium-24 (in grams). The title of the graph is "Amount of sodium-24 in 500 g Sample Over Time".

The graph shows that the amount of sodium-24 in the sample decreases over time. After 24 hours, the amount of sodium-24 in the sample decreases to approximately 375 g. After 48 hours, the amount of sodium-24 decreases to approximately 250 g. After 72 hours, the amount of sodium-24 decreases to approximately 125 g.

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Answer:

A-Ideas

Explanation:

In the gold foil experiment, alpha particles shot at gold foil bounced in the opposite direction from a gold foil which indicated atoms have a small, dense nucleus.

Rutherford’s α-particle scattering or gold foil experiment changed our perception of the atomic structure of an atom. Rutherford bombarded beams of α-particles at thin gold foil and observed how the α-particles scattered from the gold foil.

Rutherford showed that the atom has the most empty space with the nucleus at the center and electrons rotating around the atomic nucleus. Highly charged α-particles passed straight undeflected through the foil. This will be the expected result if the plum pudding model of Thomson was correct.

A few charged alpha particles were deflected backward direction leading to the positive charge concentrated in a small space.

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Answer:2.5M

Explanation:

let the number of moles = x

x/0.025L =15

x= 15*0.025 = 0.375 moles

the concentration of the new solution = moles / volume =

0.375 / (0.025+0.125) = 2.5M

Mg + 2HCl → H2 + MgCl2 because The reaction between magnesium and hydrochloric acid produces hydrogen gas and magnesium chloride.

Molecules are the smallest unit of a chemical compound that can exist independently and remain unchanged in chemical composition. A molecule is composed of two or more atoms that are chemically bonded together. A molecule can be made up of different elements, such as carbon, hydrogen, oxygen, and nitrogen, and can be composed of a variety of combinations of these elements. Molecules are essential components of all living things, as they are important for basic functions such as energy transfer, metabolism, and cell structure.

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He came to the conclusion that mass and positive charge are concentrated at the center of the atom from a small number of alpha particles deflected by huge angles with a 180.

Rutherford discovered that most positively charged alpha particles in his gold foil experiment passed straight through the foil without being deflected, leading him to believe that the majority of the atom's space is largely empty.

He came to the conclusion that mass and positive charge are concentrated at the center of the atom because there are few alpha particles that are deflected by huge angles with a 180. Rutherford Atomic Model - J. J. Thomson's "plum pudding" model was unable to account for some experimental findings related to the atomic structure of elements. British scientist Ernest Rutherford performed.

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The reactant is iron (Fe) and the oxidizing agent is oxygen (O). This reaction results in the the formation of a compound known as iron oxide (Fe2O3), which is commonly referred to as rust. The reaction can be written as:

Fe + O2 --> Fe2O3

The oxidation process involves the loss of electrons from the Fe atoms, as oxygen gains electrons and is reduced. The electrons are transferred from the iron to the oxygen, resulting in the formation of iron oxide, which is an insoluble solid.

An oxidation-reduction reaction, or redox reaction, is a reaction in which there is a transfer of electrons between chemical species (the atoms, ions, or molecules involved in the reaction).

The reaction can be written as: [tex]\bold{Fe + O2 \Rightarrow Fe_2O_3}[/tex]

After 4 minutes, 400 g of the sample would have decayed to 400 g -  (200 g x 4) = 396.2 g.

Protactinium (symbol Pa) is a rare, radioactive, metallic element in the actinide series of the periodic table. It has an atomic number of 91 and an atomic mass of 231. It is found in trace amounts in nature, but can be artificially produced in a nuclear reactor. Protactinium is a soft, silvery-gray metal that is soluble in acids and insoluble in bases. It has a high melting point and is moderately toxic. It has a variety of uses, including as a fuel source in nuclear reactors and in medical research.

After 4 minutes, 400 g of protactinium-234 would have decayed to approximately 396.2 g.
This is because the half-life of protactinium-234 is 1 minute, meaning that in one minute, half of the original amount (200 g) of the sample will decay.

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There are three main factors that affect the state of a substance: temperature, pressure, and the amount of substance.

Temperature: Temperature is a measure of the average kinetic energy of particles within a substance. As the temperature of matter increases, particles have more kinetic energy and move faster. This can change the state of matter from solid to liquid or from liquid to gas.

Pressure: Pressure is the force exerted on a substance per unit area. Applying pressure to a substance can change its state from gas to liquid or from liquid to solid.

Amount of Matter: The amount of matter in the system also affects its state. As the amount of matter in the system increases, the particles become more dense and the matter can change state from gas to liquid or liquid to solid.

Taken together, temperature, pressure and amount of matter are the three main factors that affect the state of matter. These factors can change the state of matter from solid to liquid, liquid to gas, or gas to solid.

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Answer:

16 P

40 O

Explanation:

You have 4 moles of P4O10

Therefore you multiply the subscript of each atom of the compound by 4.

There are 4 phosphorus atoms in 1 mole of P4O10 so in 4 moles you would have 4*4 atoms so 16

There are 10 oxygen atoms in 1 mole of P4O10 so in 4 moles you would have  4*10 so 40

Answer:

carbon dioxide produced, or carbon monoxide, soot produced and Soot can cause breathing problems and it blackens buildings.

Explanation:

During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).