How many moles of N2 are in a flask with a volume of 250mL at a pressure of 300. 0kPa and a temperature of 300. 0K?

Answer:

Soluble

Explanation:

hope this helps

The concentration of Au (NO₃)³ is 0.27 M , the E cell will be 1.6926v , The difference in potential between the anode and cathode is the standard cell potential.

             3Co(s)----------> 3Co² + (aq)  + 6e⁻         E₀   = 0.28v

              2Au³+(aq) + 6e⁻  -----------> 2Au(s)                 E₀   = 1.42v

-------------------------------------------------------------------------

                  3Co(s) + 2Au³+ (aq) -----> 3Co² + (aq) + 2Au(s)  

E₀cell  = 1.7v

n  = 6

Ecell   = E₀ cell -0.0592/n log Q

          = 1.7 -0.0592/6log[Co²+]³/[Au³+]²

          = 1.7-0.00986log(0.74)³/(0.27)²

         = 1.7-0.00986log(5.5586)

          = 1.7-0.00986 × 0.7449

          = 1.6926v

A half-cell's willingness to be reduced (also known as its reduction potential) is indicated by the value of E. It shows the number of volts that are expected to cause the framework to go through the predefined decrease, contrasted with a standard hydrogen half-cell, whose standard cathode potential is characterized as 0.00 V.

The standard cell potentials or standard electrode potentials include the standard reduction potential. The difference in potential between the anode and cathode is the standard cell potential.

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No, the CO2 content of the atmosphere is not as high as 300 parts per million. According to the World Meteorological Organization, the current global average CO2 concentration is around 417 parts per million (ppm).

This is the highest atmospheric CO2 concentration in the last 800,000 years, and it has been steadily increasing since the start of the Industrial Revolution. This increase in atmospheric CO2 is largely due to the burning of fossil fuels, which releases CO2 into the atmosphere. Deforestation and other land use changes also contribute to the release of CO2. The accumulation of CO2 in the atmosphere has caused the global average temperature to rise and has led to climate change.  Therefore, a CO2 concentration of 300 ppm is not high enough to cause dangerous climate change, but it is still significantly higher than the pre-industrial level of around 280 ppm.

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The total mass of the items is 853.8 g, according to the solution.

We are aware that in order to determine the mass of the products and the overall mass of the products produced by the reaction, the stoichiometric principles must be applied.

The answer to the question states that 496. 5 grammes of lead II nitrate react with potassium bromide in a way that the lead II nitrate is totally consumed in the reaction. This indicates that the lead II nitrate is the reaction's limiting reactant.

Number of lead II nitrate moles

= 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced

= 1.5 moles * 367 g/mol

= 550.5 g

If 2 moles of potassium nitrate are created from 1 mole of lead II nitrate

1.5 moles of lead II nitrate produces

=  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate

= 3  moles * 101.1

= 303.3 g

Total mass produced

= 550.5 g + 303.3 g

= 853.8 g

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For each acetyl group that enters the citric acid cycle, the activated carriers produced are three NADH, one FADH2, and one GTP.

The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions that occur in the mitochondria of eukaryotic cells. The citric acid cycle plays a critical part in the metabolic pathway known as aerobic cellular respiration.

It is a process that produces the ATP (adenosine triphosphate) used by cells to carry out their functions. It takes place in the mitochondrial matrix and is the second stage of aerobic respiration.

The citric acid cycle, which is also known as the tricarboxylic acid cycle or the Krebs cycle, produces NADH, FADH2, and GTP, which are all essential components of the electron transport chain.

Therefore, the correct option is A] three NADH, one FADH2, one GTP.

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One change in homes that could help save electrical energy is to replace all incandescent bulbs with LED bulbs.

There are different ways one can save electrical energy in their home. Some of them include:

LED bulbs are known as Light-Emitting Diode bulbs. They are energy-saving bulbs, although might be more expensive than their incandescent counterparts.

According to research, LED bulbs have the capacity to save up to 75% of energy compared to other bulbs. Thus, if anyone is looking to save electrical energy and they have incandescent bulbs at some lighting points, they will get very good results by replacing them with LED bulbs.

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Answer: One change in homes that could help save electrical energy is to replace all incandescent bulbs with LED bulbs. They are energy-saving bulbs, although might be more expensive than their incandescent counterparts.According to research, LED bulbs have the capacity to save up to 75% of energy compared to other bulbs. Thus, if anyone is looking to save electrical energy and they have incandescent bulbs at some lighting points, they will get very good results by replacing them with LED bulbs.Turning off all lights and electrical appliances when not in use. Reduction of electrical appliances. For tv, set brightness, contrast and enable power saving mode. These are two other ways to consume less energy in your home.

Explanation: I hope this helps

When potassium chloride (KCl) is dissolved in water, the temperature decreases because the energy required to separate the potassium (K) and chloride (Cl-) ions and the energy required to separate the water molecules is greater than the energy produced by the attractions between the K and Cl- ions.

When KCl dissolves in water, the K and Cl- ions are surrounded by water molecules. The process of dissolving involves breaking the ionic bonds between the K and Cl- ions and the formation of new ion-dipole interactions between the ions and water molecules. To separate the K and Cl- ions, energy must be supplied to overcome the attractive forces between them. Additionally, to separate the water molecules, energy is required to disrupt the intermolecular hydrogen bonding between the water molecules. The energy produced by the attractions between the K and Cl- ions is not sufficient to compensate for the energy required to break these bonds. As a result, energy is absorbed from the surroundings, which leads to a decrease in temperature. The endothermic process of dissolving KCl in water, which requires more energy input than energy released, causes the temperature of the solution to decrease.

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Answer:

Detail is given below.

Explanation:

Given data;

Abundance of Berkmarium-95 = 70%

Abundance of Berkmarium-97 = 28%

Abundance of Berkmarium-94 = 2%

Average atomic mass closer to which isotope = ?

Solution:

1st of all we will calculate the average atomic mass of Berkmarium.

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100

Average atomic mass  = (70×95)+(28×97)+(2×94) /100

Average atomic mass =  6650 + 2716+ 188 / 100

Average atomic mass= 9554 / 100

Average atomic mass = 95.54 amu

The average atomic mass is closer to the isotope Berkmarium-95  because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.

Answer:

2.068

Explanation:

D = M/V

3.04 /1.47

= 2.068

Interactions between magnesium ions (Mg2+) and amino acid residues, such as methionine, can occur in a variety of ways depending on the specific environment and the chemical properties of the amino acid. At pH 7, methionine is typically in its neutral form.

One possible interaction between Mg2+ and methionine involves the coordination of the Mg2+ ion by the sulfur atom of methionine's side chain. The Mg2+ ion can form coordination bonds with the lone pair of electrons on the sulfur atom, resulting in a stable complex. Several factors can influence how methionine interacts with Mg2+ or other metal ions. These factors include the pH of the solution, the concentration of the metal ion, the presence of other ligands or competing ions, and the spatial arrangement of the amino acid residues in the protein structure. The specific coordination geometry and stability of the complex can also be influenced by the presence of other amino acids in the vicinity. It's important to note that the exact interaction between Mg2+ and methionine can vary in different biological contexts, and the specific coordination pattern can be influenced by the overall protein structure and the role of methionine within the protein's functional site.

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The buoy is approximately 380.97 meters from the base of the oil rig.

To solve this problem, we need to use trigonometry. Let's call the distance between the base of the oil rig and the buoy "x". We can then use the tangent function to find x.
Tangent of the angle of depression = opposite side / adjacent side
In this case, the opposite side is the height of the oil rig (40 meters) and the adjacent side is the distance we are trying to find (x).

So, tan(6 degrees) = 40 / x

We can solve for x by multiplying both sides by x and then dividing both sides by tan(6 degrees):

x = 40 / tan(6 degrees)

Using a calculator, we can find that tan(6 degrees) is approximately 0.1051. So:

x = 40 / 0.1051
x = 380.97 meters

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Answer:

waste energy = 30 J

Explanation:

Given that.

Input energy = 100 J

Useful energy = 70 J

We need to find the amount of waste energy.

Waste energy = total energy - used energy

= 100 J - 70 J

= 30 J

Hence, 30 J of energy is waste energy.

Answer:

oxygen has the highest atomic mass.

Answer:

C Oxygen

Explanation:

The answer would be C since the protons and the neutrons are somewhat the same number / similar. As well as the periodic table would have somewhere in the elements "box".

Answer:

Explanation:

We know that for every mole of nitrogen consumed, 3 moles of hydrogen are consumed.

So, hydrogen is the limiting reactant, and if 10 moles of hydrogen are used, then the reaction will occur 3.33 times.

Hence, this means there is enough nitrogen left for the reaction to occur another 0.67 times, and hence 0.67 moles of nitrogen will be left over.

Answer:

113562  milliliters are in a 30 gallon drum

Explanation:

because you have to convert gallons into milliliters

could you put my answer as the brainist!!!!!!!

Phosphoric acid has three equivalence points, corresponding to its three dissociable protons. In this lab, you should be able to see all three equivalence points if you perform a complete titration of the acid.

Phosphoric acid, which has the chemical formula H3PO4, is a triprotic acid. This means it has three acidic hydrogen atoms that can be donated to a base in an acid-base reaction.
Therefore, phosphoric acid has three equivalence points. An equivalence point is reached when the number of moles of the base added to the acid is equal to the number of moles of acidic hydrogens in the acid.
In a lab setting, you should be able to observe all three equivalence points if you carefully titrate the phosphoric acid with a strong base, such as sodium hydroxide (NaOH), and use an appropriate indicator or a pH meter to monitor the changes in pH during the titration.

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The price per gallon is $5.16.

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Answer:

Explanation:

Convert mass in gms .. 987 gms

Density = mass/ volume

= 987/4.52 x102

= 2.18 g/mL

Sulfurous acid is a weak acid with the molecular formula H2SO3. It has two acidic hydrogen atoms, which can be sequentially neutralized. The successive neutralizations of each acidic hydrogen of sulfurous acid are as follows:

First acidic hydrogen: H2SO3 + NaOH → NaHSO3 + H2O

The molecular equation is H2SO3 + 2NaOH → Na2SO3 + 2H2O

The net ionic equation is H2SO3 + 2OH- → SO32- + 2H2O

Second acidic hydrogen: NaHSO3 + NaOH → Na2SO3 + H2O

The molecular equation is HHSO3 + NaOH → Na2SO3 + H2O

The net ionic equation is HSO3- + OH- → SO32- + H2O

Overall reaction: H2SO3 + 2NaOH → Na2SO3 + 2H2O

The molecular equation for the overall reaction is H2SO3 + 2NaOH → Na2SO3 + 2H2O

The net ionic equation for the overall reaction is H2SO3 + 2OH- → SO32- + 2H2O

In summary, the molecular and net ionic equations for the successive neutralizations of each acidic hydrogen of sulfurous acid are given above.

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The number of grams of water that are produced from the moles of H₂ is 108.09 grams .

From the balanced chemical equation, we see that 2 moles of H₂ reacts to produce 2 moles of H₂O. Therefore, 1 mole of H₂ reacts to produce 1 mole of H₂O.

To find the number of moles of water produced from 6.00 moles of H₂, we can use the stoichiometry of the balanced chemical equation:

6.00 moles H₂ x (2 moles H₂O / 2 moles H₂) = 6.00 moles H₂O

So 6.00 moles of H₂ produces 6.00 moles of H₂O. To convert moles of water to grams, we need to use the molar mass of water:

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

So, the mass of 6.00 moles of H₂O is:

6.00 moles H₂O x 18.015 g/mol = 108.09 g

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B. The pH will change very little, if at all. The buffer will accept the hydrogen ions from the added acid, keeping pH constant.

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It consists of a weak acid and its conjugate base (or a weak base and its conjugate acid). The presence of these components allows the buffer to effectively maintain the pH of the solution.

When a small amount of acid is added to a buffered solution, the buffer system will react with the added hydrogen ions (H+) by accepting them. The weak base component of the buffer will act as a base, accepting the extra H+ ions and preventing a significant change in pH. This process is known as the buffer's capacity to "absorb" or "neutralize" the added acid.

As a result, the pH of the buffered solution will change very little, if at all. The buffer system will effectively maintain the pH by balancing the addition of acid with the acceptance of hydrogen ions, thereby keeping the solution's pH constant.

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C is the answer ok

u dont need to know

Atoms of the same element may have different mass numbers.

The particles in the solution can be separated from heterogeneous mixtures by passing the mixture through a filter (option b).

The particles in the solution can be separated by using different types of methods such as for example a filter that is able to separate particles depending on their size or net charge.

Therefore, with this data, we can see that particles in the solution can be separated depending on their sizes, electrical charges, etc, and for that purpose, we can use a filter of any other type of method.

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Answer:

a. Bronze

b. Copper

Explanation:

a. The alloy formed from the mixture of molten tin and molten copper, with copper having the over triple of the quantity of tin, is bronze. Although, these two metals are often not the only metals present in bronze.

b. The solvent in this mixture is molten copper. This is because, it has the larger percentage of the constituents and hence can easily allow other constituents to be dissolved in it.

The characteristics of the mixtures allow to find the answers to this question about bronze are:

In chemistry when materials do not react with each other, a new compound is not formed, therefore there is a mixture of unreacted elements.

The mixture is the union of two or more components united, but that do not react chemically, we can have two types of mixture:

In mixtures, the material that is in less quantity is called solute and the material that is in greater quantity is called solvent.

In this case we have a combination of Tin and Copper, by heating when they are taken to the liquid state the mixture is formed, the result is a material where no phase or separation can be distinguished, therefore we are in the presence of a homogeneous solution, that cooling would be a solid solution.

Therefore, copper and tin maintain their chemical properties, but the physical properties are altered, this solution is widely used industrially and is called Bronze.

We have 1 mole of tin and 5 moles of Copper, so the solute is the material in the least amount of Tin and the solvent is the material in the greatest amount of Copper.

In conclusion, using the characteristics of the mixtures we can find the answer to this question about bronze:

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The empirical formula of the compound is Fe₂O₃, representing the simplest mole ratio of Fe and O.

The empirical formula represents the relative proportion of elements in a compound, showing the simplest, whole-number ratio of atoms.

It is often referred to as the molecular formula. While molecular formulas provide the actual number of atoms in a molecule, empirical formulas convey the ratios of the elements.

In the given compound composed of 72.36% Fe and 27.64% O by mass, the empirical formula is Fe₂O₃.

To determine the empirical formula:

Assume 100 g of the compound.

Calculate the number of moles for each element.

Find the ratio of moles for each element.

Divide each mole value by the smallest mole value to obtain the simplest mole ratio.

Write the empirical formula.

Following these steps:

Assuming 100 g of the compound, there are 72.36 g of Fe and 27.64 g of O.

Calculate the moles of Fe: Moles of Fe = (72.36 g Fe) / (55.85 g/mol) = 1.294 mol Fe

Calculate the moles of O: Moles of O = (27.64 g O) / (16 g/mol) = 1.7275 mol O

The ratio of moles is Fe:O = 1.294 mol Fe : 1.7275 mol O

Dividing each value by the smallest value of 1.294, we get Fe:O = 1 : 1.33

The empirical formula is Fe₂O₃.

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Answer:

Li₃N ( Lithium nitride)

The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.

mass of reactants there = 21.5 g if Li + 21.3 g of Nitrogen

= 42.8 g

hence the mass maximum mass of Li3N produced is 42.8 g

Answer:

1) 60°

2) 60°

3) 45°

4) E

5)90°

6) E