Calculate the number of nitrogen atoms in a container of volume 0.50 dm³ at 0 °C. The pressure of the gas is 101 Pa.​

To determine the maximum \(Fe_2(SO_4)_3\) produced, we find the limiting reactant (Fe), calculate theoretical yield (0.3383 mol), and obtain a percentage yield of 47.56%.

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Answer:

b.

Explanation:

The concentration of the HNO₃ solution needed to neutralize the 27.60 mL of 1.00 M NaOH is 2.76 M

The balanced equtaion is given below:

HNO₃ + NaOH —> H₂O + NaNO₃

Now, we shall obtain the concentration of the HNO₃ solution needed for the neutralization reaction. This is shown below:

CaVa / CbVb = nA / nB

(Ca × 10) / (1 × 27.6) = 1

(Ca × 10) / 27.6 = 1

Cross multiply

Ca × 10 = 27.6

Divide both side by 10

Ca = 27.6 / 10

Ca = 2.76 M

Thus, the concentration of the HNO₃ solution needed is 2.76 M

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Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

I think it's c but I'm not sure

Answer: C

Explanation:

The responses that can be included are : matter is any substance that has mass and takes up space, matter can be identified using physical properties, such as density and the boiling and melting points, matter can be identified based on chemical properties such as reactivity, flammability, and composition.

Matter is any substance that has mass and takes up space. This is a fundamental characteristic of matter, distinguishing it from non-material entities. Matter can be identified using physical properties such as density. Density is the measure of how much mass is contained in a given volume of a substance. Additionally, the boiling and melting points of matter can also be used to identify it. These points represent the temperatures at which matter changes from one state to another (e.g., from a solid to a liquid or from a liquid to a gas). Matter can also be identified based on its chemical properties. Chemical properties include reactivity, which refers to how a substance interacts with other substances; flammability, which indicates the ability to burn or ignite; and composition, which refers to the types and proportions of elements or compounds present in a substance. These characteristics and properties help scientists categorize and understand different forms of matter, enabling them to study and manipulate it for various purposes, such as in chemistry, physics, and engineering.

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When burning magnesium is lowered in a gas jar full of carbon dioxide, the burning process continues because the carbon dioxide acts as an oxidizing agent.

A combustion reaction is a type of chemical reaction that occurs when a fuel, such as a hydrocarbon, reacts with an oxidizing agent, such as oxygen, to produce heat and light in the form of a flame. The basic equation for a combustion reaction is:

Fuel + Oxidant → Heat + Light + Products

In the case of burning magnesium, the fuel is magnesium and the oxidant is carbon dioxide. The products of the reaction are magnesium oxide and carbon dioxide. Combustion reactions are exothermic, meaning they release energy in the form of heat.

This means that the carbon dioxide provides the oxygen necessary for the combustion reaction to continue, allowing the magnesium to continue burning. Additionally, the carbon dioxide also helps to extinguish the flame by removing the heat and the oxygen from the combustion zone.

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Answer:

D. Gold and copper

From the table, the two metals which heat up about the same rate are iron and copper. These two metals have about close specific heat of capacities. Thus, they will cool or heat up in closer rates.

Specific heat of capacity of a substance is the heat energy required to raise the temperature by one degree Celsius per one gram. It is an intensive quantity and does not depends on  the amount of the substance.

The specific heat of the substance indicates the rate at which the substance cools down or heats up. It depends on the nature of the substance and its bond type.

Here, the two metals having closer specific heat capacities are iron and copper. Copper has specific heat of 0.39 and iron has 0.46 J/g° C. Hence, they will heats up in about same rates. Therefore, option C is correct.

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The reaction is spontaneous under conditions of low pressure and high temperature

We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.

The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.

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Avogadro's number lets you calculate the number of anything in a mole:

0.250 mol Br2 X 6.02 X 10^23 molecules/mole = 1.50 X 10^23 molecules

One mole of Br₂ contains 6.02 × 10²³  bromine molecules  or formula units. Hence, 0.250  moles of Br₂  contains 1.5 × 10²³ Br₂  molecules.

One mole of a substance is its amount containing 6.02 × 10²³  atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.

Similarly one mole of every compound contains 6.02 × 10²³  molecules. The mass of one mole of compound is called its molar mass.

Br is 35th element in periodic table. One mole of bromine molecule  contains 6.02 × 10²³ Br₂ molecules . Hence number of molecules  of 0.250 moles is:

0.250  × 6.02 × 10²³  = 1.5 × 10²³ .

Hence, there will be 1.5 × 10²³  Br₂  atoms in 0.250  moles.

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Answer: 14.0

Explanation: 14.0 is a base. The more basic, the less hydrogen ion concentration.

The Gibbs free energy change for the given reaction at 25°C and the given concentrations is -25.5 kJ/mol

The Gibbs free energy change (∆G) of a reaction can be calculated using the equation:

∆G = -RT ln(K)

Where R is the gas constant (8.314 J/molK), T is the temperature in Kelvin, and K is the equilibrium constant.

The equilibrium constant (K) can be calculated from the acid dissociation constant (Ka) as:

K = [C] ÷ ([A] × [B])

Substituting the given values, we get:

K = (5.00 x 10⁻⁵) ÷ (1.50 x 1.00) = 3.33 x 10⁻⁵

Therefore,

∆G = - (8.314 J/molK) × (298 K) × ln(3.33 x 10⁻⁵)

= 25.5 kJ/mol

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CH3Cl would have a dipole moment, oriented from the H atoms towards the Cl atom.

This is because the Cl atom is more electronegative than the H atoms, so the electrons in the covalent bond between them will be pulled more towards the Cl atom. This creates an uneven distribution of charge and a net dipole moment.

CH3Cl, also known as chloromethane or methyl chloride, is a colorless, flammable gas with a sweet odor. It is a hydrocarbon, meaning it consists of hydrogen and carbon atoms, and is classified as a haloalkane due to the presence of a chlorine atom. CH3Cl is used in a variety of industrial processes, including as a refrigerant and a propellant. It is also used to produce other compounds, such as acetic acid and methylene chloride.

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Answer:

Mass of product = 20 grams

Explanation:

Given:

Amount of baking soda = 10 grams

Amount of vinegar = 10 grams

Find:

Mass of product

Computation:

Using Law of conservation of mass

Mass of product = Amount of baking soda + Amount of vinegar

Mass of product = 10 grams + 10 grams

Mass of product = 20 grams

The thing that cellular respiration and a piece of avocado turning brown is that both chemical changes.

Cellular respiration is a chemical process because there occurs the change of substances. The final byproducts of cellular respiration are ATP, water, and carbon dioxide which are result of chemical processes.

On the other hand, a piece of avocado oxidizing and turning brown is a chemical transformation that happens when the enzyme polyphenol oxidase in the fruit's cells combines with oxygen in the air. This irreversible process can be slowed down by preserving the avocado or using lemon juice.

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Answer: To convert grams (g) to moles (mol), we need to use the molar mass of the substance. We can use the following formula:

moles = mass (in grams) / molar mass

We will assume that we are given the mass of a pure substance. If the substance is a compound, we will need to look up the molar mass in the periodic table or calculate it using the atomic masses of its elements.

Let's assume that we are given 18.2 g of a pure substance and we want to convert it to moles. We will need to look up the molar mass of the substance. For example, let's say the substance is water (H2O):

Molar mass of H2O = 2(1.008 g/mol) + 1(15.999 g/mol) = 18.015 g/mol

Now we can use the formula to convert grams to moles:

moles = 18.2 g / 18.015 g/mol = 1.009 mol

Therefore, 18.2 g of the substance is equivalent to 1.009 mol of the substance.

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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Answer:

D

Explanation:

due yo high energy from the ocean to the earth

The moles of silver iodide produced are 5.00 moles.

Given:

The balanced chemical equation:

\(MgI (aq)+2AgNO_3 (aq)\rightarrow 2 Agl(s) + Mg(NO_3)_2(aq)\)

To find:

The moles of silver iodide produced when 2.50 moles of magnesium iodide react with sufficient silver nitrate.

Solution:

Moles of magnesium iodide = 2.50 mol

\(MgI(aq) +2AgNO_3 (aq)\rightarrow 2 Agl(s) + Mg(NO_3)_2(aq)\)

According to the reaction, 1 mole of magnesium iodide gives 2 moles of silver iodide, then 3.50 moles of magnesium iodide will give:

\(=\frac{2}{1}\times 2.50 mol=5.00 \text{mol of AgI}\)

The moles of silver iodide produced are 5.00 moles.

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Answer:  4 atoms is the answer. I hope it helped you.

Explanation:

Answer:

552 g of LiNO₃

Explanation:

From the question given above, the following data were obtained:

Volume of solution = 2 L

Molarity of LiNO₃ = 4 M

Mass of LiNO₃ =?

Next, we shall determine the number of mole of LiNO₃ in the solution. This can be obtained as follow:

Volume of solution = 2 L

Molarity of LiNO₃ = 4 M

Mole of LiNO₃ =?

Molarity = mole /Volume

4 = mole of LiNO₃ / 2

Cross multiply

Mole of LiNO₃ = 4 × 2

Mole of LiNO₃ = 8 moles

Finally, we shall determine the mass of of LiNO₃ needed to prepare the solution. This is can be obtained as follow:

Mole of LiNO₃ = 8 moles

Molar mass of LiNO₃ = 7 + 14 + (16×3)

= 7 + 14 + 48

= 69 g/mol

Mass of LiNO₃ =?

Mole = mass /Molar mass

8 = Molar mass of LiNO₃ /69

Cross multiply

Molar mass of LiNO₃ = 8 × 69

Molar mass of LiNO₃ = 552 g

Thus, 552 g of LiNO₃ is needed to prepare the solution.

For a species to survive it must be within its geographical zone for all the genetic factors.

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The relative atomic mass of chlorine is 35.5 and its molecular mass is 71 g/mol.

Given that;

1amu = 1.66 x 10-24 grams

To find the mass of chlorine-35 in amu = 5.807 x 10-23 g × 1 amu/ 1.66 x 10-24 grams

= 34.98 amu

To find the mass of chlorine-37 in amu;  6.139 x 10-23 g × 1 amu/ 1.66 x 10-24 grams

= 36.98 amu

To find the relative atomic mass of chlorine;

RAM = (0.7577 × 34.98 amu) + (0.2423 × 36.98 amu)

RAM = 26.50 + 8.96

RAM = 35.5

Since chlorine is a diatomic substance that exists as Cl2, the molar mass of chlorine is 2(35.5) = 71 g/mol

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Answer:

25 gram left

Explanation:

Given data:

Total mass = 100 g

Half life of radioactive material = 10 years

Mass left after 20 years = ?

Solution:

First of all we will calculate the number of half lives passed during 20 years.

Number of half lives = time elapsed / half life

Number of half lives = 20 years / 10 years

Number of half lives = 2

At time zero 100 g present.

At first half life = 100 g/2 = 50 g

At 2nd half life = 50 g/2 = 25 g

Thus, after 20 years 25 gram of radioactive material left.

Answer:

Biogas units provide a cleaner and safer source of energy, enabling rural families to produce their own electricity, heat, and fertilizer. One advantage of these plants is that they can be used in exactly the place they're needed, thereby averting the need for extensive, costly power landlines.

The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen. Therefore, the correct option is option A.

Cells turn sugars into energy through a process called cellular respiration. Cells need fuel or an electron acceptor to power the chemical process that converts energy into usable forms such as ATP along with additional kinds of energy that can be utilised to power cellular reactions.

All multicellular species, including eukaryotes, as well as certain single-celled organisms, generate energy by aerobic respiration. Utilising oxygen, which is the strongest electron acceptor found in nature, is called aerobic respiration. The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen.

Therefore, the correct option is option A.

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Answer:

Kc = 3.94

Explanation:

CH₃COOH(g) + C₂H₅OH(g) → CH₃COOC₂H₅(g) + H₂O(g)

Liquids aren't included in the equilibrium constant, but at 100°C, all four compounds are a gas.  So the equilibrium equation is:

Kc = [CH₃COOC₂H₅] [H₂O] / ([CH₃COOH] [C₂H₅OH])

Set up an ICE table for each row and calculate the value of Kc.  Then average the results.  (See picture.)

Kc ≈ (3.919 + 4.012 + 3.902) / 3

Kc ≈ 3.94

According to the Foliated Metamorphic Rock Chart slate, phyllite, schist, and gneiss can all have the same parent rock (shale) is a true statement.

Slate, phyllite, schist, and gneiss are all types of metamorphic rocks that can be formed from shale, which is a sedimentary rock composed of clay and other fine-grained minerals. The specific type of metamorphic rock that is formed from shale depends on the conditions under which the shale undergoes metamorphism, including the temperature, pressure, and presence of fluids.

Slate is a fine-grained metamorphic rock with a uniform, flat surface and a layered structure. It is formed when shale undergoes low-grade metamorphism, which occurs at relatively low temperatures and pressures.

Therefore, Gneiss, on the other hand, is a medium- to coarse-grained metamorphic rock with a banded or wavy texture. It is formed when shale undergoes high-grade metamorphism, which occurs at higher temperatures and pressures.

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