A coal-burning power plant generates 8.53 × 1016 J per year. If the coal yields 36.0 kJ/g, how many grams of coal was burned each year?

Sodium carbonate, often referred to as Na2CO3, is a chemical compound composed of atoms of sodium (Na), carbon (C) and oxygen (O).

It is also sometimes called washing soda or soda ash. At room temperature, sodium carbonate is a white, crystalline solid that is very soluble in water. According to the chemical formula of the sodium carbonate molecule, Na2CO3, each molecule consists of two sodium atoms (Na), one carbon atom (C) and three oxygen atoms (O). The atomic configuration in sodium carbonate is shown in the given diagram.

A trigonal planar arrangement is formed when the central carbon atom is bonded to three oxygen atoms. The structure of sodium carbonate is completed by two sodium atoms joined to oxygen atoms.

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer:

s = 30 miles = 48.2 km

Explanation:

Since, Gabby Goose is flying at a constant speed. Therefore, the formula for the distance covered by Gabby Goose while flying is given as follows:

\(s = vt\)

where,

s = distance covered while flying = ?

v = speed of flying = 30 mph

t = time consumed = 1 h

Therefore, using these values in the equation, we get:

\(s = (30\ mph)(1\ h)\)

s = 30 miles = 48.2 km

Given that the T. rex was extinct 65 million years ago, this period of time is comparably brief, and we do not anticipate the carbon-14 in the fossil to have gone through 15,000 half-lives.

To reduce a drug's concentration by 95% to 97%, it takes four to five half-lives. the time frame of the drug's activity. The longer the half-life of the medicine, the longer its plasma concentration will remain above the minimum effective concentration.

The formula t = (t1/2) x (log N0/Nt) can be used to compute the amount of time needed for 15,000 half-lives to occur.

We can estimate the amount of time needed for 15,000 half-lives to occur as follows:

t = (5,700 years) x (log 1/1x10⁻¹²)

t ≈ 82,000 years

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Answer:

Mount, Charger, Colt, Pony, and Folt

Explanation:

Answer:

A stallion or a mare

Explanation:

Answer:

John Dalton

Explanation:

The structure of the compound is shown in the image attached

The molecular formula gives information about the types and number of atoms in the compound. This can be used to determine the possible functional groups and the degree of unsaturation (the number of rings or double bonds) in the compound.

When we look at the name of the compound, we can be able to tell the bonds and the substituents that we have in the compound and that would help us to deduce its structure.

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The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

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Answer: valeraldehyde

Explanation:

I had to memorize this one

The functional group present is aldehyde and name of compound is valeraldehyde.

Functional group is defined as a substituent or group of toms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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Answer:

One difference between Group 7 of the modern periodic table and Group 7 in Mendeleev's periodic table is the placement of the elements.

In Mendeleev's periodic table, Group 7 consisted of manganese (Mn), technetium (Tc), and rhenium (Re). In the modern periodic table, Group 7 consists of the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

The halogens are a group of highly reactive nonmetals, while the elements in Group 7 of Mendeleev's periodic table were not all nonmetals and did not share the same chemical properties as the halogens.

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i. The remains were interred on the foothills or mountainsides, ii. A mining region provided the soil, iii. Dirt was transferred from a subsurface location, iv. The soil had been dug up and compacted using a shovel.

The soil samples collected from the burial contained rocks and minerals that are typically found in mountainous areas, which lends credence to the assertion that the victims were interred in the highlands or foothills of the mountains.

ii. Soil was collected from a mining area: The discovery of iron, copper, and other minerals typical of mining sites lends credence to this argument.

iii. Subsurface dirt was moved: This assertion is confirmed by the presence of a layer of subsoil in the soil samples that was distinct from the top soil.

iv. The soil had been dug up and compacted using a shovel: The presence of both loose and compacted soil in the soil samples lends credence to this assertion.

v. The earth on the shovel and at the gravesite matched each other: The fact that the shovel and burial dirt samples both contained identical minerals and had comparable chemical compositions lends credence to this assertion.

vi. Animals played a role in the crime's resolution: This assertion is reinforced by the fact that the grave's surroundings had been disturbed by animals, which led detectives to the location of the grave.

b) The various methods of examination employed to contrast the soil discovered on the shovel and the soil discovered at

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Answer:

Chlorine Iodine is a compound made out of one Chlorine molecule and one Iodine molecule

Explanation:

Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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The chemical formula for copper(II) sulfate is CuSO4.

Copper(II) sulfate is a chemical compound that is made up of copper, sulfur, and oxygen. It has the chemical formula CuSO4 and is commonly referred to as "blue vitriol" or "bluestone." Copper(II) sulfate can be prepared by reacting copper oxide or copper metal with sulfuric acid. It is a blue-colored crystalline solid that dissolves easily in water.

Copper(II) sulfate has many uses in industry and can be used as a fungicide, herbicide, pesticide, and in the manufacture of other chemicals. It is also commonly used in schools and laboratories as a reagent in chemical reactions and experiments.

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We know that

v1 = k[CHCl3][Cl2]

If the concentration of CHCl3 is increased by a factor of five while the concentration of Cl2 is kept the same, then :

v2 = k[5CHCl3][Cl2]

v2 = 5(k[CHCl3][Cl2])

v2 = 5v1

The rate will increase five times

To solve this we need to have knowledge of experimental rate law which relates the rate to the concentration raise to some power. The  rate of reaction will increase by a factor of 5.

A rate law represents the rate of a reaction . According to this rate is directly proportional to  the concentration of reactants. There is another expression of rate law which is integrated rate law which is just opposite of differential rate law.

The experimental rate law for given reaction is given as:

Rate = k[CHCl₃][Cl₂]

If the concentration of CHCl₃ is increased by a factor of five while the concentration of Cl₂ is kept the same, the rate will be

[CHCl₃]=[5CHCl₃]

Substituting in the above equation we get

Rate = k[5CHCl₃][Cl₂]

Rate =5 k[CHCl₃][Cl₂]

Rate = 5 times the original rate

Therefore, the rate of reaction will increase by a factor of 5.

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Answer:

When vinegar and baking soda are combined a mixture is produced which is carbon dioxide. A gas is released.

Explanation:

The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."

What do you mean by inorganic compound?

An inorganic compound is a chemical compound that does not contain carbon-hydrogen (C-H) bonds, which are the defining characteristic of organic compounds. Inorganic compounds can be composed of a variety of elements, including metals, non-metals, and metalloids.

The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."

Phosphate compounds are essential nutrients for plant growth and are often added to fertilizers to improve soil fertility. However, when excess phosphate is added to water bodies, it can lead to eutrophication, a process where an excessive growth of algae and other aquatic plants occur, ultimately leading to oxygen depletion and harm to aquatic life.

Phosphates are also commonly used in detergents to aid in cleaning, but they can have similar negative impacts on water quality if they are not properly treated before being discharged into waterways. Therefore, regulations are in place to limit the amount of phosphate that can be added to detergents and other products in many countries to mitigate water pollution.

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Answer:

A typical atom consists of three subatomic particles: protons, neutrons, and electrons (as seen in the helium atom below). Other particles exist as well, such as alpha and beta particles (which are discussed below). The Bohr model shows the three basic subatomic particles in a simple manner. Most of an atom's mass is in the nucleus—a small, dense area at the center of every atom, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus, and originates from the protons. Neutrons are neutrally-charged. Electrons, which are negatively-charged, are located outside of the nucleus.

Explanation:

The original concentration of the H₂C₂O4 solution is 0.7455 mol/L.

The balanced chemical equation for the reaction between H₂C₂O4 and NaOH is:

H₂C₂O4 + 2NaOH → Na₂C₂O₄ + 2H₂O

From this equation, we can see that the acid reacts with the base in a 1:2 ratio, meaning that one mole of H₂C₂O4 will react with two moles of NaOH.

To find the original concentration of the acid solution, we need to use the formula for calculating molarity:

Molarity = moles of solute / volume of solution (in liters)

We can start by calculating the number of moles of NaOH used in the titration:

moles of NaOH = Molarity x volume of NaOH used (in liters)

moles of NaOH = 0.4700 mol/L x 0.05820 L

moles of NaOH = 0.027354 moles

Since the acid and base react in a 1:2 ratio, we know that the number of moles of H₂C₂O4 is half the number of moles of NaOH used:

moles of H₂C₂O4 = 0.027354 moles / 2

moles of H₂C₂O4 = 0.013677 moles

Now we can use the formula for molarity to calculate the original concentration of the acid solution:

Molarity of H₂C₂O4 = moles of H₂C₂O4 / volume of H₂C₂O4 used (in liters)

Molarity of H₂C₂O4 = 0.013677 moles / 0.01835 L

Molarity of H₂C₂O4 = 0.7455 mol/L

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If the metal was not heated long enough, the calculated specific heat of the metal will be different from then measured specific heat capacity of the metal, and there will be error in measurement of the specific heat capacity of the metal

The specific heat capacity of a metal is the quantity of heat required to raise the temperature of a unit mass of the metal by 1 kelvin.

The heat capacity of a metal and its specific heat capacity is given by the following formula.

Q = mcΔθ

c = Q/mΔθ

where;

When a metal is heated for a long period of time, it acquires thermal energy which causes its temperature to increase.

As the temperature of the metal increases, the difference in temperature of the metal increases as well. The increase in the temperature difference of the metal causes a decrease in the specific heat capacity of the metal.

However, if the metal was not heated long enough, the difference in temperature of the metal will be small and the value of the specific heat capacity will increase.

When the value of the specific heat capacity increases, it will be different from the calculated specific heat of the metal and cause error in measurement of specific heat capacity of the metal.

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Around 0.0296 molarity is the molality of the solid solution. D: 0.0296 m is the closest possible response.

When examining a solution's vapour pressure and temperature-related characteristics, concentrations expressed in molality are utilised. Molality is utilised since its value is unaffected by temperature fluctuations. On the other hand, a solution's volume is marginally temperature-dependent.

Finding the moles of the solute (chromium) and the mass of the solvent (iron) in kilogrammes is the first step in calculating the molality of the mixture:

moles of Cr = 0.125 g / 52 g/mol = 0.00240 mol

mass of Fe = 81.3 g

mass of solvent = mass of Fe - mass of Cr = 81.3 g - 0.125 g = 81.175 g = 0.081175 kg

The quantity of moles of solute per kilogramme of solvent is the definition of molality, which we can utilise now:

molality = moles of solute / mass of solvent in kg

molality = 0.00240 mol / 0.081175 kg = 0.0295 mol/kg

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The specific gravity of the liquid is 1.125.

The specific gravity of a substance is the ratio of its density to the density of water at a particular temperature.

Therefore, we need to calculate the density of the liquid and compare it to the density of water at the same temperature.

The formula for density is:

density = mass/volume

density of the liquid = 45.0 g / 40.0 mL = 1.125 g/mL

At 4 °C, the density of water is 1.000 g/mL.

Therefore, the specific gravity of the liquid is:

specific gravity = density of liquid / density of water = 1.125 g/mL / 1.000 g/mL = 1.125

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To calculate the molarity of vinegar, we need to know the moles of acetic acid (the main component of vinegar) and the volume of vinegar used.

The change in volume during the titration is:

Change in volume = Final volume - Initial volume

                = 33.5 mL - 12.3 mL

                = 21.2 mL

Assuming that the density of vinegar is approximately 1 g/mL, we can convert the change in volume to grams:

Change in volume (mL) × Density (g/mL) = Mass (g)

21.2 mL × 1 g/mL = 21.2 g

Next, we need to convert the mass of acetic acid to moles. The molar mass of acetic acid (CH3COOH) is approximately 60.05 g/mol:

Moles = Mass (g) / Molar mass (g/mol)

     = 21.2 g / 60.05 g/mol

     ≈ 0.353 mol

Finally, we calculate the molarity of vinegar using the moles and total volume:

Molarity = Moles / Total volume (L)

        = 0.353 mol / 0.0212 L

        ≈ 16.65 M

Therefore, based on the information provided, the molarity of vinegar is approximately 16.65 M.

Answer: write anything given below in the diagram except for the neutral substances

Explanation:

Answer:

Alkaline

1 drain cleaner

2 oven cleaner

3 baking soda

4 drain unblocker

Acid

1 drain cleaner

2 bowl cleaner

3 house bleach

4 diluted soap

Explanation:

The freezing point depression is a colligative property. We have to find the mass of ethylene glycol that we have to add to 100.0 g of water to change its freezing point from 0.0 °C to -4.3 °C.

The freezing point depression for a solution can be calculated using the following equation:

ΔTf = kf * molality * i

Where ΔTf is the freezing point depression, kf is the freezing point depression constant (it depends on the solvent and for water is 1.86 °C/m), molality is the molality of the solution and i is the Van't Hoff factor.

The Van't Hoff factor represents the number of particles formed when that compound dissolves. In our case the solute is ethylene glycol, a covalent compound, so it won't form ions when dissolved in the water. Then i is equal to 1.

The temperature must change from 0.0 °C to -4.3 °C, then the freezing point depression is 4.3 °C. So we know that:

i = 1 kf = 1.86 °C/m ΔTf = 4.3 °C

We can replace those values in the formula and find the molality of the solution.

ΔTf = kf * molality * i

4.3 °C = 1.86 °C/m * molality * 1

molality = 4.3 °C/(1.86 °C/m)

molality = 2.31 m

Now we can get the moles of ethylene glycol from the definition of the molal concentration. Molality are the moles of solute per kg of solvent. The mass of water is 100 g.

mass of solvent = 100.0 g * 1 kg/(1000 g)

mass of solvent = 0.100 kg

molality = moles of solute/(mass of solvent in kg)

moles of solute = molality * mass of solvent in kg

moles of solute = 2.31 m * 0.100 kg

moles of solute = 0.231 moles

And finally we can convert the moles of ethylene glycol to grams using its molar mass.

molar mass of C₂H₆O₂ = 62.07 g/mol

mass of C₂H₆O₂ = 0.231 moles * 62.07 g/mol

mass of C₂H₆O₂ = 14.4 g

Answer: 14.4 g of ethylene glycol must be mixed.

The percent yield for the reaction of a sample of 0.49 g of carbon dioxide was obtained by heating 1.22 g of calcium carbonate is 92.4%

Given the mass of carbon dioxide (\(CO2\)) = 0.49g

The mass of calcium carbonate (\(CaCO3\)) = 1.22g

The reaction is as follows:

\(CaCO3(s) -- > CaO(s)+CO2(s)\)

As we see 1 mole of CaCO3 is required to produce 1 mole of \(CO2\)

The molar mass of calcium carbonate, = 100.09 g/mol.

The molar mass of given carbon dioxide = 44g

mass of \(CaCO3\) used = number of moles x molar mass = 1 * 100 = 100g

Mass of \(CO2\) produced = 1 * 44 = 44g

Here for 100g of \(CaCO3\) 44g of \(CO2\) is produced.

Then for 1.22g of \(CaCO3\) = 44 * 1.22/100 = 0.53g of \(CO2\) is produced.

But the actual yield of carbon dioxide is 0.49 g

The percent yield is calculated by dividing the actual yield by the theoretical yield and multiplying by 100.

percent yield = 0.49/0.53 * 100 = 92.4%

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Answer:

(a) Rate of formation of NO2 is also 0.066M/s

(b) Rate of reaction of O2 gas is 0.033M/s

Explanation:

(a) in one second, according to the equation,

2 moles of NO combines with 2moles of NO2.

Therefore 0.066M NO will still consume 0.066mole NO2.

(b) According to the equation,

2 moles NO consumes 1 mole O2, 0.0666M will consume 0.0333 mole O2

When your body needs nucleotides to copy DNA activities for making copies of DNA molecules, then they are obtained from macronutrients (e.g., amino acids).

Nucleotides are the building block of DNA (i.e., Adenine, Guanine, Cytosine and Thymine), and they are obtained from foods, being mainly synthesized using small molecules such as amino acids.

In conclusion, when your body needs nucleotides to copy DNA activities for making copies of DNA molecules, then they are obtained from macronutrients (e.g., amino acids).

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Answer:

Please put question in!

Explanation: