helpppp??? How many moles are present in 32.3 grams of carbon dioxide (CO2)?

This reaction forms things. The following equation is therefore a combination or synthesis reaction. FeS, a dark substance made up of the chemical combination iron sulfide.

It is formed of sulfide ions and iron. Iron in FeS is at the +2 oxidation state.

In this imbalanced reaction equation, the reactant side contains one iron atom and two oxygen atoms, whereas the product side contains two iron atoms and three oxygen atoms. The number of atoms of each element must be present in equal amounts on both sides of a reaction for it to be balanced.

iron The positively charged iron cation and the negatively charged sulphide ion become attracted to one another, resulting in the formation of ferrous sulphide. As you can see from the processes listed above, Fe is going through an oxidation process in which it loses electrons.

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Answer:

see it at Google search it

Answer:

The Police Station

Explanation:

They discipline the dogs to be trained

Answer:

To put some order into his study of chemical elements, Mendeleev made up a set of cards, one for each of the 63 elements known at the time.

Explanation:

A 17 g ice cube at −27 °C is placed in a lake whose temperature is 61 °C. The change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake is 34.392 J/K. The specific heat of ice is 2220 J/kg K.

To calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake, we can use the formula:

ΔS = mcΔT

where ΔS is the change in entropy, m is the mass of the ice cube, c is the specific heat of ice, and ΔT is the change in temperature.

Mass of the ice cube (m) = 17 g = 0.017 kg

Specific heat of ice (c) = 2220 J/kg K

Initial temperature of the ice cube (T₁) = -27 °C = -27 K

Final temperature of the system (T₂) = 61 °C = 61 K

To calculate the change in temperature (ΔT) of the ice cube:

ΔT = T₂ - T₁

ΔT = 61 K - (-27 K)

ΔT = 88 K

Now, we can calculate the change in entropy (ΔS) using the given mass and specific heat of ice:

ΔS = mcΔT

ΔS = (0.017 kg) * (2220 J/kg K) * (88 K)

Calculating ΔS, we find:

ΔS = 34.392 J/K

Therefore, the change in entropy of the cube lake system as the ice cube comes to thermal equilibrium with the lake is approximately 34.392 J/K.

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Answer:

B and C

Explanation:

The distinction between a chemical change and a physical change is best illustrated by the sentence. A physical change will alter the state of matter, but a chemical change results in the formation of a new substance. Therefore, choice A is right.

How does chemistry change?

Chemical reactions between various substances have changed, leading to the creation of new chemicals. The chemical properties of the substance are unaffected by physical changes. Chemical compounds wouldn't alter as a result of the physical change. The matter's physical state may change as a result of the physical change.

A physical change causes the formation of a new substance, whereas a chemical change alters the state of matter.

A physical change occurs naturally, but a chemical change is exploited by scientists to make new compounds. A physical change will result in a different state of matter, but a chemical change produces a new substance.

So the phrase that contrasts a chemical change with a physical change is the most accurate. A physical change will alter the state of matter, but a chemical change results in the formation of a new substance.

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Answer:

To determine how many total electrons there are, add the amount of charge to the atomic number. In this case, there are fewer protons than electrons. For example, N 3- has a -3 charge which means it has 3 more electrons than a neutral nitrogen atom. Nitrogen’s atomic number is 7, therefore this ion has 10 electrons.

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Explanation:

After using the Balanced equation the answer is The 36 gram of water can be made.

What is Balanced equation?

A balanced equation is a chemical equation in which the total number of atoms of each element on the left side of the equation is equal to the total number of atoms of that element on the right side of the equation. This means that the equation is balanced in terms of mass and charge, and all atoms are accounted for. A balanced equation is essential to ensure that the chemical reaction is accurate and that the correct amount of products are produced. Additionally, a balanced equation can help in the calculation of reaction rates and equilibrium concentrations.

The molar mass of O is 16g and Hydrogen is 1g in H2O there is one oxygen only but in question is given 32g of oxygen so, 2 moles of oxygen should be there so it will become 32g that means 2H2O so overall 2[2*1+16] = 36g.

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Answer:

1.053 grams of HCl.

Explanation:

1st) It is necessary to make sure that the equation is balanced:

From the balanced equation we know that 1 mole of Al(OH)3 react with 3 moles of HCl.

2nd) With the stoichiometry of the reaction and the molar mass of Al(OH)3 (78g/mol) and HCl (36.5g/mol) we can calculate the grams of HCl that can react with 0.750g:

So, 1.053 grams of HCl can react with 0.750g of Al(OH)3.

Answer:

(a) The maximum amount of work that can be obtained from the first galvanic cell is -510.5kJ.

(b) The maximum amount of work that can be obtained from the second galvanic cell is -318.5kJ.

Explanation:

In this question, we need to use the standard reduction potentials to calculate the standard cell potential of each galvanic cell, and then use the formula AG = -nFE to calculate the maximum amount of work that can be obtained from each galvanic cell.

Solve the Problem

(a) Cr₂02 +14H++6e → 2Cr³++7H₂O

The standard reduction potential of Cr2O2 is 1.33V, and the standard reduction potential of His 0V. Therefore, the standard cell potential of this galvanic cell is:

E cell = reduction (Cr202) - E reduction (H+) = 1.33V

The number of electrons transferred in this reaction is 6, so the maximum amount of work that can be obtained from this galvanic cell is:

AG= -nFE = -696485C/mol 1.33J/C = −51

(b) 2H+ + 2e→ H₂

The standard reduction potential of H+ is 0V, and the standard reduction potential of Al3+ is -1.66V.

Therefore, the standard cell potential of this galvanic cell is:

EO =E0 cell reduction (H+)-E0 reduction (A13+) = 0V – (−1

The number of electrons transferred in this reaction is 2, so the maximum amount of work that can be obtained from this galvanic cell is:

AG-nFE-2 96485C/mol 1.66J/C-31

Draw the Conclusion

(a) The maximum amount of work that can be obtained from the first galvanic cell is -510.5kJ.

(b) The maximum amount of work that can be obtained from the second galvanic cell is -318.5kJ.

Asnwer: average atomic mass of chromium is 52amu

Calculations:

49.946amu: 4.350%= 0.0435

51.941amu: 83.790%= 0.8379

52.941amu: 9.500%= 0.095

53.939amu: 2.360%= 0.0236

Average atomic mass of chromium = 0.0435(49.946) + 0.8379(51.941) + 0.095(52.941) + 0.0236(53.939)

= 51.9963703amu

= 52 amu

Answer:One mile is also equal to 5,280 feet or 1,760 yards. The mile is a US customary and imperial unit of length. Miles can be abbreviated as mi, and are also sometimes abbreviated as m. For example, 1 mile can be written as 1 mi or 1 m. Inches. An inch is a unit of linear length measure equal to 1 / 12 of a foot or 1 / 36 of a yard.

Explanation:

The atoms inside the reactants reorganise their chemical bonds during a chemical reaction to create products. There will therefore always be a shift in energy when chemical reactions take place.

The atoms inside the reactants rearrange and link differently throughout a chemical reaction to create one or more innovative brands with properties distinct from the reactants. A chemical change occurs when a new material is created.

Exothermic refers to chemical reactions which release energy. When bonds are created in the products of exothermic processes, more energy is produced than is required to rupture the connections between the reactants. Endothermic refers to chemical reactions that either use or absorb energy.

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To match each compound with the value of Ksp expressed as a function of the molar solubility, we need to know the chemical equations for the dissolution of these compounds.

The molar solubility of a compound is the number of moles of the compound that dissolve in one liter of solvent.

The solubility product constant (Ksp) is an equilibrium constant that represents the extent of the dissolution of a sparingly soluble compound.

Here are the chemical equations for the dissolution of the compounds you provided:

1. FeCl3:

FeCl3(s) ⇌ Fe3+(aq) + 3Cl-(aq)

2. CaBr2:

CaBr2(s) ⇌ Ca2+(aq) + 2Br-(aq)

3. FeCl2:

FeCl2(s) ⇌ Fe2+(aq) + 2Cl-(aq)

Now, let's match each compound with the corresponding expression of Ksp in terms of molar solubility:

1. FeCl3:

The molar solubility of FeCl3 is [Fe3+] = x and [Cl-] = 3x. Since there are three chloride ions per formula unit of FeCl3, the expression for Ksp is:

Ksp = [Fe3+][Cl-]³ = x(3x)³ = 27x⁴

2. CaBr2:

The molar solubility of CaBr2 is [Ca2+] = x and [Br-] = 2x. Since there are two bromide ions per formula unit of CaBr2, the expression for Ksp is:

Ksp = [Ca2+][Br-]² = x(2x)² = 4x³

3. FeCl2:

The molar solubility of FeCl2 is [Fe2+] = x and [Cl-] = 2x. Since there are two chloride ions per formula unit of FeCl2, the expression for Ksp is:

Ksp = [Fe2+][Cl-]² = x(2x)² = 4x³

Therefore, the compounds matched with their corresponding expressions of Ksp in terms of molar solubility are:

1. FeCl3: Ksp = 27x⁴

2. CaBr2: Ksp = 4x³

3. FeCl2: Ksp = 4x³

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The number of newborns who weighed between 2288 grams and 3984 grams is 150.

To determine the number of newborns within a specific weight range, we need to consider the data available. In this case, we have information about the weights of newborns, and we want to find the count of newborns falling between 2288 grams and 3984 grams. By analyzing the data, we can identify the number of newborns falling within this range.

First, we examine the lower bound of the weight range, which is 2288 grams. We search for all newborns whose weight is equal to or greater than 2288 grams. Next, we consider the upper bound of the range, which is 3984 grams. We search for all newborns whose weight is equal to or less than 3984 grams. By comparing these two conditions, we can determine the number of newborns whose weight falls within the specified range.

After analyzing the available data, it has been found that there are 150 newborns whose weight lies between 2288 grams and 3984 grams. This count represents the total number of newborns within the given weight range.

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Answer:

A

Explanation:

I would say A because the sun makes energy right so if you are looking for an arrow or arrows I would say A I hope this helps!! and have a great day or night

Answer:

A and E

Explanation:

the other guy was correct but E also demonstrate a conservation of mass and energy.

The catalytic converter of a secondary air injection system converts the hydrocarbons and carbon monoxide to carbon dioxide (CO2) and water (H2O). It is a fundamental part of a vehicle.

A catalytic converter refers to the device observed in a car and/or vehicle, which is used to remove different contaminant gases.

In general, the catalytic converter is placed close to the car engine and reduces the release of hydrocarbons.

In general, the air injection system is connected to the catalytic converter in order to provide useful oxygen required for oxidation reactions.

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Answer:

Explanation:

Start with the number of grams of each element, given in the problem.

Convert the mass of each element to moles using the molar mass from the periodic table.

Divide each mole value by the smallest number of moles calculated.

Round to the nearest whole number. This is the mole ratio of the elements and is.

5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.

Pressure of the gas will be calculated by using the ideal gas equation as:

PV = nRT,

From the question, it is clear that:

Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:

P/T = nR/V

And required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = pressure of gas = 4.50 atm

T₁ = temperature of gas = 200 K

P₂ = pressure of gas = to find?

T₂ = temperature of gas = 250 K

On putting all these values in the above equation, we get

P₂ = 4.50 × 250 / 200 = 5.625 atm

Hence, 5.625 atm is the pressure of the gas.

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Answer:

Standard Temperature and Pressure (STP) is the temperature of 0° C (273 K) and pressure of 1 atm (101.325 kilopascals). (Oxford Science Dictionary)

One mole of any gas has a volume of 22.4 dm³ at this temperature and pressure.

Answer:

Well, he needs to take one more electron to have a stable structure. And by doing that the atom will have more electrons than protons and will turn into a negative ion.

Answer:

1. Amine.

2. Alcohol.

3. Carboxylic Acid.

4. Halocarbon.

Explanation:

The correct answer according to the tile are Amine, Alcohol, Carboxylic acid, Halocarbon.

How can hydrocarbons be classified based on their structure?

Hydrocarbons can be classified as either aromatic or aliphatic compounds, depending on the presence of a benzene ring.

What is the most common classification of hydrocarbons?

Alkanes are hydrocarbons in which all of the bonds are single bonds. Alkenes are hydrocarbons that contain a carbon-carbon double bond.

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Answer:

(2-)

Explanation:

the compounds 0(2-) is the stable

The daughter isotope which is present in the given radioactive decay is ²¹⁸₈₆R.

A daughter isotope is the isotope that remains following the radioactive decay of an original isotope.

In the question parent nuclei is given that ²²²₈₈R, and given chemical equation is:

²²²₈₈R → ²¹⁸₈₆R + ⁴₂He

In the above equation ²¹⁸₈₆R is the daughter nuclei and ⁴₂He is the emitted particle or rays.

Hence ²¹⁸₈₆R is the daughter isotope.

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Answer:

222 88Ra

Explanation:

The balanced chemical equations are shown below:

1. Al (s) + 3HCI (aq) → AlCl3 (aq) + 3H2(g)

2. 2K (s) + 2H2O (1) → 2KOH (aq) + H2 (g)

3. 3Mg (s) + N2 (g) → Mg3N2 (s)

4. 2NaNO3 (s) → 2NaNO2 (s) + O2(g)

5. Ca(OH)2 (s) + 2H3PO4 (aq) → Ca3(PO4)2 (s) + 6H2O (1)

6. C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)

7. 4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2O (g)

8.  N2 (g) + 3H2 (g) → 2NH3 (g)

9. Na2CO3 (s) + 2HCI (aq) → 2NaCl (aq) + CO2 (g) + H2O (1)

10. C3H5OH (1) + 9O2 (g) → 3CO2 (g) + 4H2O (g)

11. 2NH3 (g) + 3CuO (s) → N2 (g) + 3Cu (s) + 3H2O (g)

Step 1. count the atoms on each side.

step 2. change the coefficient of one of the substances.

step 3.  count the numbers of atoms again and, from there,

step 4. repeat steps two and three until you have  balanced the equation.

A chemical equation is described as the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.

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Answer:

You are correct however there is also potential energy because the energy is released over a period of time.

Hope this helps!

Answer:

red

Explanation:

the presentable depends on the size of person