what is the number of moles formed when 20.50g of Copper 2 oxide completely react with hydrogen gas.​

The mass of nitroglycerin : 34.52 g

Reaction

4C₃H₅N₃O₉ ⇒ 12 CO₂ + 10H₂O + 6N₂ +O₂

Volume = 10 L

Temperature = -5°C=268 °K

Pressure = 1 atm

mol of CO₂ (ideal gas) :

\(\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 10}{0.082\times 268}\\\\n=0.455\)

mol ratio C₃H₅N₃O₉ : mol CO₂= 4 : 12, so mol C₃H₅N₃O₉ :

\(\tt \dfrac{4}{12}\times 0.455=0.152\)

mass C₃H₅N₃O₉ (MW=227,0865 g/mol):

\(\tt 0.152\times 227.0865=\boxed{\bold{34.52~g}}\)

pH (potential of hydrogen) scale is defined as the way to measure how acidic or basic a solution is, this range will gro from 0 to 14, and 7 means that the solution is neutral. This scale is measured by observing how much H+ ions and OH- ions are in the solution.

In order to calculate the pH, we need the concentration of H+ or OH-, and then we can use the following formula with a logarithm

pH = -log [H+], the brackets indicate concentration

Acidic solutions must have their pH below 7

Basic solutions must have their pH above 7

Neutral solutions will have the pH at exactly 7

It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.

A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.

Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.

The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.

The strength of the bond is in the following order: H.....F > H.....O > H......N

The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.

Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.

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Answer:uses world like

Explanation:

The electrical conductivity is mainly determined by the types of chemical bonds; metallic bonds cause metals to have high electrical conductivity, and these are favored for wires.

Answer:

Explanation:

convert to grams

0.133 mol C x 12 = 1.596

0.267 mol H x 1 = 0.267

Now subtract those numbers from the 4.00

4.00-1.596 -0.267 = 2.137 g O

Now convert grams O to moles

2.137 x (1mole O/16 g O) =0.1335625 moles O

3 sig figs = 0.134 moles O

Answer:

C. Response to environment

Answer: C. investigations are usually wrong

Explanation: Because investigation are usually wrong and then that leads to more  and more questions

Explanation:

It can take up to two years to become a pharmacy technician, depending on the education program you choose. In fact, most pharmacy certification programs can be in a year, or less than eight months.

In the given equation,\(2SO_3\)(g) + 45 kJ ↔ 2\(SO_2\)(g) + \(O_2\)(g), if \(SO_2\) is added, the equilibrium will shift to the right, favoring the formation of products.

To understand why this shift occurs, we can consider Le Chatelier's principle. According to this principle, when a system at equilibrium is subjected to a change in conditions, the system will adjust to counteract the change and restore equilibrium.

In this case, adding more \(SO_2\)disrupts the equilibrium because it increases the concentration of one of the reactants. To counteract this increase in \(SO_2\)concentration, the system will shift to the right, favoring the forward reaction. As a result, more \(SO_3\) will be consumed, and more products (\(SO_2\)and \(O_2\)) will be formed until a new equilibrium is reached.

By shifting to the right, the system aims to reduce the excess \(SO_2\)concentration and restore the balance between the reactants and products.

The shift occurs because the forward reaction is exothermic, indicated by the release of 45 kJ of heat. According to Le Chatelier's principle, increasing the concentration of a reactant will favor the endothermic direction, in this case, the forward reaction that consumes \(SO_2\).

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Answer: ea sports

Explanation:

A compound is a substance that contains two or more elements chemically combined in a fixed proportion. However, it is not an element because it can be broken down into simpler substances – carbon and hydrogen. ... Recall that the components of a mixture can be separated from one another by physical means.

Answer:

by using electric cars

Explanation:

nice to see theres another emily yoder on here?

Answer:

We can start by replacing all non-renewable sources with renewable source to prevent harm of land and pollution. Then we can go to solar/energy powered machine instead of coal and oil which is harming our system by harvesting and throwing away.

Explanation:

I used the results from the first part of the experiment to design a marble run by understanding the principles of potential and kinetic energy.

Kinetic energy is the energy of motion. It is the energy an object has due to its motion. When an object is moving, it has kinetic energy. This energy is dependent on the mass of the object and its velocity. Kinetic energy can be calculated by multiplying the mass of the object by the square of its velocity and then dividing the result by two. Kinetic energy is one of the two main types of energy, along with potential energy. It has the ability to cause change within a system, such as breaking chemical bonds. When an object is at rest, it does not have kinetic energy. However, as soon as it begins to move, it acquires kinetic energy. Kinetic energy can be changed or transferred from one object to another, or from one form to another.

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The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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By solving the equation we get:NaHCO3 has a molecular mass   84 g/mol.

Na2CO3 has a molecular weight of 0.02 mol.

Mass of Na2CO3 = **2.12 g**

Daltons or atomic mass (Da or u) are used to measure molecular mass, which is the mass of a certain molecule1. The molecular mass indicates a molecule's mass in relation to the 12 C atom, whose mass is assumed to be 12. The molar mass, which is stated in g/mol1, is the mass of a particular material divided by the amount of that substance. Hence, the molecular mass is the mass of a single particle or molecule, whereas the molar mass is the average of numerous particles or molecules

The equation below illustrates how heating causes sodium hydrogencarbonate to break down:

Na2CO3(s) + H2O(g) + CO2 = 2 NaHCO3(s) (g)

a) I The formula: can be used to determine how many moles of sodium hydrogencarbonate were utilised.

Molar mass = mass times the number of moles

NaHCO3 has a molecular mass of (23 + 1 + 12 + 48) g/mol, or 84 g/mol.

3.36 g of NaHCO3 divided by 84 grammes per mole yields 0.04 moles.

ii) Stoichiometry can be used to calculate the quantity of sodium carbonate produced:

We can deduce from the balanced equation that 2 moles of NaHCO3 result in 1 mole of Na2CO3.

Na2CO3 has a molecular weight of (0.04 mol 2 mol) 1 mol = 0.02 mol.

iii) The formula Mass = Number of moles Molar mass can be used to determine the mass of sodium carbonate produced.

molar volume of Na2CO3 = (23 × 2 + 12 + 48) g/mol = 106 g/mol

Mass of Na2CO3 = 0.02 mol × 106 g/mol = **2.12 g**

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The organs of the digestive system such as the pancreas, liver, stomach, small intestine, and large intestine help in the digestion of food.

Organs are a collection of tissues that are closely related and which perform a related function.

The role and function of the organs of the digestive system are as follows:

Therefore, the organs of the digestive system such as the pancreas, liver, stomach, small intestine, and large intestine help in the digestion of food.

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"All matter is made of tiny particles called atoms" is considered a scientific theory. Therefore the correct option is (B)

A scientific theory is a well-substantiated explanation of a natural phenomenon that has been repeatedly tested and confirmed through observation, experimentation, and data analysis.

From the statements in the question above, we can see that Option (B)  is a well-established and widely accepted explanation of a natural phenomenon that has been extensively tested through observation and experimentation.

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The charge on the ions in an ionic compound containing cobalt(III) and fluoride ions is Co³⁺ and F⁻¹ and the formula of the compound is CoF₃.

Ionic compounds are a type of chemical compound where the oppositely-charged ions of a metal and a nonmetal are attracted to each other to form an ionic bond.

The compound formed from the bonded ions will have very different properties from the elements that make up the compound.

While atoms are neutral because they have an equal number of protons and electrons, ions have a net charge and result when an atom loses or gains electrons.

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The elements 56 L and 53 M correspond to Barium (Ba) and Iodine (I), respectively. The compound formed from these elements is Barium Iodide, which has the chemical formula BaI2.

Barium Iodide (BaI2) is a white crystalline solid that is soluble in water. It is an ionic compound formed from the combination of barium cations (Ba^2+) and iodide anions (I^-). Barium Iodide is commonly used in various applications, including the production of high-purity iodine, as a scintillation crystal for detecting ionizing radiation, and as a source of iodine in animal feed.

BaI2 is a strong electrolyte and dissociates completely into ions when dissolved in water, making it a good conductor of electricity. It has a high thermal stability and is relatively unreactive to other chemical species. However, it can react with strong acids to release hydrogen iodide gas, which is a toxic and highly reactive substance.

In addition, Barium Iodide is considered toxic if ingested and can cause adverse effects such as abdominal pain, diarrhea, and vomiting. Handling of the compound should be done with care, following proper safety procedures and wearing protective equipment such as gloves and goggles.

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This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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Answer:

0.625g/mL

Explanation:

D=mass (grams) / Volume (mL or cm^3)

m=125g
V=200mL

D= 125g/200mL= 0.625g/mL

Answer:

The closest star is the answer.

We want to find the concentration of the resulting solution of mixing 35mL of a given solution and 0.225 L of water.

We will find that the concentration is 13.5%.

First, we need to write both of these in the same units.

We know that:

1000 mL = 1L

Then:

35 mL = 0.035 L

So when we mix the solution and the water we end with a total volume of:

V = 0.035L + 0.225L = 0.260L

The concentration of solution will be equal to the quotient between the volume of solution we used (0.035 L) and the total volume of the mixture (0.260L)

We will get:

Concentration = (0.035L)/(0.260L) = 0.135

Now to write it as a percentage, we only need to multiply this by 100%.

0.135*100% = 13.5%

This means that the mixture has a concentration of the 13.5%.

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The true statements are;

The reaction is endothermic

Heat is a reactant

ΔHrxn is 89 kJ/mol

Enthalpy is a thermodynamic property that represents the total energy of a system, including both its internal energy (the energy of its constituent particles) and the energy it has due to its temperature and pressure. It is commonly used in energy analysis and heat transfer calculations and is expressed in units of joules (J) or calories (cal).

We know that the enthalpy of the reaction can obtained from;

Enthalpy of the products - Enthalpy of the reactants

ΔH reaction = 2(-391.4) - 2(-435.9)

(-782.8) - (-871.8)

= 89 kJ/mol

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Answer:

Atoms are similar in the way that their nuclei contain only protons and neutrons.

Answer:

All things are made of atoms, and all atoms are made of the same three basic particles - protons, neutrons, and electrons. But, all atoms are not the same. The difference in the number of protons and neutrons in atoms account for many of the different properties of elements.

I hope this helps :)

The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.

Answer: I think 82.46

Explanation: The atomic number for strontium, or Sr on the periodic table, is 38. With knowing the atomic number, I multiplied that by the number of moles given.

38 × 2.17 = 82.46

I hope this helps!!

The number of atoms present in 2.17 moles of strontium are  \(1.306774 \times 10^{24}\).

An atom is the smallest indivisible unit of a chemical element that retains the chemical properties of that element. It is the basic building block of matter.

To determine the number of atoms in a given number of moles, we can use Avogadro's number, which is approximately \(6.022 \times 10 ^{24}\) atoms per mole.

In this case, we have 2.17 moles of strontium. To find the number of atoms, we multiply the number of moles by Avogadro's number:

Number of atoms = \(2.17 moles\times6.022\times 10^{23}\)\(atoms/mole\)

On calculating this expression:

Number of atoms =\(1.306774 \times 10^{24}\)

Therefore, there are approximately \(1.306774 \times 10^{24}\) atoms in 2.17 moles of strontium.

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Answer:

Molecules in the skin are moving faster than molecules in the glass.

Explanation:

Put it in your own words.

Answer:

The energy from the ice transferred to the glass.

Answer: 96.7072445

Explanation: F = 1/T

The answer is D.

Hope this helps!

Answer:

i would say D mostly because I don't know what the other ones mean

Explanation:

(just looked them up and I still think its D)