Explain why mixtures can be separated by physical methods, such as sieving and distillation.

The reaction consumes 20 moles of oxygen, and it produces 16 moles of nitrogen monoxide and 24 moles of water.

What is mole?

The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample. The mole is defined as containing exactly 6.022×10²³ elementary entities.

When ammonia reacts with oxygen, the balanced equation is:

4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)

It is known that 16 moles of ammonia react, and we have to calculate the moles of oxygen, nitrogen monoxide, and water produced by the reaction.

The balanced equation shows that 4 moles of NH3 react with 5 moles of O2 to produce 4 moles of NO and 6 moles of H2O.

According to the stoichiometry of the reaction, 16 moles of NH3 will react with

(5/4) × 16 = 20 moles of O2

Hence, the reaction consumes 20 moles of oxygen.

The balanced equation shows that 4 moles of NH3 react with 4 moles of NO to produce 4 moles of NO and 6 moles of H2O.

According to the stoichiometry of the reaction, 16 moles of NH3 will produce

(4/4) × 16 = 16 moles of NO

Hence, the reaction produces 16 moles of nitrogen monoxide.

The balanced equation shows that 4 moles of NH3 react with 6 moles of H2O to produce 4 moles of NO and 6 moles of H2O.

According to the stoichiometry of the reaction, 16 moles of NH3 will produce

(6/4) × 16 = 24 moles of H2O

Hence, the reaction produces 24 moles of water.

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The key differences between the Articles of Confederation and the U.S Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

The document created the better system of government for the new nation is the US constitution.

The Article of confederation , the state have stronger power than the central power and in the US constitution , the power of central government is stronger than the states. The important development was the establishment of three departments. There are three departments of government that is legislative , executive and judicial.

Thus, The key differences between the Articles of Confederation and the U.S. Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

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A. The number of mole of Si₃N₄ formed is 0.12 mole

B. The limiting reactant is Si

C. The mole of the excess reactant leftover is 0.24 mole

First, we shall obtain the mole present in 10 g of Si and 10 g of N₂

Mole = mass / molar mass

Mole of Si = 10 / 28

Mole of Si = 0.36 mole

Mole = mass / molar mass

Mole of N₂ = 10 / 28

Mole of N₂ = 0.36 mole

Now, we shall determine the limiting reactant. Details below

3Si + N₂ -> Si₃N₄

From the balanced equation above,

3 moles of Si reacted with 1 mole of N₂

Therefore,

0.36 mole of Si will react with = (0.36 × 1) / 3 = 0.12 mole of N₂

Since only 0.12 mole of N₂ is required to react completely with 0.36 mole of Si

Thus, the limiting reactant is Si and the excess reactant is N₂

The mole of the excess reactant leftover can be obtained as illustrated below:

Mole of excess reactant leftover = Mass given - mass reacted

Mole of excess reactant leftover = 0.36 - 0.12

Mole of excess reactant leftover = 0.24 mole

The mole of Si₃N₄ produced can be obtained as illustrated below:

3Si + N₂ -> Si₃N₄

From the balanced equation above,

3 moles of Si reacted to produced 1 mole of Si₃N₄

Therefore,

0.36 mole of Si will react to produce = (0.36 × 1) / 3 = 0.12 mole of Si₃N₄

Thus, the number of mole of Si₃N₄ formed is 0.12 mole

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Answer:

the option is option(J)

The factor that make the climates different at Missoula, MT and Cape Elizabeth, ME is C. altitude and proximity to large bodies of water.

Missoula, MT is located in a high-altitude region and is far from large bodies of water, which results in a continental climate with cold winters and hot summers.

Cape Elizabeth, ME is located at a lower altitude and is near the Atlantic Ocean, which results in a maritime climate with mild winters and cool summers.

In conclusion, one of the factors that endures that the climates in Missoula and Cape Elizabeth, is the altitude as well as how close they are to oceans.

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False. The H-N-H bond angles in ammonia (NH₃) are actually smaller than the H-O-H bond angles in water.

In ammonia, the H-N-H bond angle is approximately 107.5°, while the H-O-H bond angle in water is approximately 104.5°. This difference is mainly due to the presence of two lone pairs of electrons on the oxygen atom in water, which repel the O-H bonds, leading to a smaller bond angle compared to ammonia, which has only one lone pair of electrons on the nitrogen atom.

The nitrogen atom possesses a partial charge that is opposite to that of each hydrogen atom, which is partially positive.

The electrons inside ammonia molecules are distributed with uneven charges. The nitrogen atom has a partial negative charge because it is more electronegative than the hydrogen atom and draws electrons to it. In addition to having a partial positive charge, hydrogen is less electronegative than nitrogen. As a result, the nitrogen atom has a partial negative charge, whereas the hydrogen atom has a partly positive charge.

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The complete question is

Find the statement True or false: The H-N-H bond angles between the nitrogen and the hydrogens in ammonia (NH₃) are larger than the H-O-H bond angle in water because the three N to H bonds need more room to spread out as opposed to just the two o to H bonds.

Answer:

big ablsolty long pp

Explanation:

dong

Answer:

Is the letter C

Explanation:

You have to divide the mass with the volume

At 35°C, the value of Kw (the ionic product of water) is 1.16 x 10^-14.

The pH of a solution is determined by the concentration of hydrogen ions (H+) in the solution. The pH of a 0.10 M NaOH solution at 35°C is 12.68. The pH of a solution is related to the ionic product of water (Kw), which is defined as the product of the concentrations of the hydrogen (H+) and hydroxide (OH-) ions in the solution. At 35°C, the value of Kw is 1.16 x 10^-14.

At 35°C, the value of Kw (the ionic product of water) is 1.16 x 10^-14.

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a. Molarity: 0.512 M

b. Osmolarity: 1.024 Osm

c. % mass/volume: 0.69 %

a. Molarity: Molarity is a measure of the concentration of a solute (salt, in this case) in a solution, expressed as moles of solute per liter of solution. To find the molarity, we need to divide the number of moles of solute (Na2S) by the volume of solution (2.5 liters):

moles of solute = 31.4 g / (mol weight of Na2S) = 31.4 g / 142.1 g/mol = 0.22 moles

Molarity = moles of solute / liters of solution = 0.22 moles / 2.5 liters = 0.512 M

b. Osmolarity: Osmolarity is a measure of the total concentration of solutes in a solution. It considers the number of particles that are produced when the solute dissociates in solution. In this case, Na2S dissociates into 2 sodium ions (Na+) and 1 sulfide ion (S2-), so the osmolarity of the solution is 2 times the molarity:

Osmolarity = 2 x Molarity = 2 x 0.512 M = 1.024 Osm

c. % mass/volume: This is a measure of the concentration of a solute in a solution, expressed as the mass of solute in grams per 100 ml of solution. To find the % mass/volume, we need to divide the mass of solute (31.4 g) by the volume of solution (2.5 liters) and multiply by 100:

% mass/volume = (mass of solute / volume of solution) x 100 = (31.4 g / 2.5 L) x 100 = 1,256 g/L x 100 = 126,560 g/L = 126.56 g/L = 0.69 %

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Metals such as copper, silver, and gold are the least reactive and are at the bottom of the reactivity scale, this is the reason tha gold is non-reacive.

The one electron in the 6s orbital is more closely bonded to the nucleus and has less space to form bonds with other atoms as a result of the contraction of the 6s orbital. The 4f and 5d orbitals expand but cannot participate in bond formation since they are totally filled. This explains why gold is largely inert.

Due to its low reactivity in the reactivity series and its propensity to resist reactions with moisture or air, gold does not corrode. Most acids and oxygen have little effect on gold. Compared to other substances like sulphides or oxides, gold is the most stable.

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Answer:

dic

Explanation:

First, we write the reaction and balance it:

HNO2 (aq) + NH3 (aq) = NH4+ + NO2- (Balanced)

Data:

50 mL of 0.2 M HNO2

50 mL of 0.2 M NH3

In total, we have 100 mL, therefore, this solution between HNO2 and NH3 will be diluted in half. I mean: The concentration of HNO2 and NH3 will be 0.10 M

HNO2 (aq) + NH3 (aq) = NH4+ + NO2-

Initial 0.10 M 0.10 M 0 0

reacts -x -x +x +x

Equilibrium 0.10-x 0.10-x +x +x

Now, we write Kc:

Values of x:

For 1) x = 0.0999

For 2)x = 0.1001

We choose number 1) x = 0.0999

Number 2 gives us a value higher than the initial values of concentration

Therefore, concentration in equilibrium of NH3 = 0.10-x =0.10 - 0.0999 = 0.00010M

Answer: A. 0.00010M

Answer:

1.37 L

Explanation:

(87.0)(0.492)(643)÷(39.1)(515)

27522.972 ÷ 20136.5

=

1.36682005314

↓

1.37 (Rounded)

Hope this Helps!

Answer:

1.37 L

Explanation:

XD

Explanation:

Foremost among the threats is fishing bycatch—marine animals incidentally caught and killed in fishing operations.

This is a serious crisis, not only for these charismatic animals, but also for the health of our oceans, where cetaceans play an irreplaceable role as apex predators.

The molality of a solid solution containing 867 g of aluminum and 14.9 g of copper is 0.27 mol/kg.

The molality of a solution is a way to express the concentration of the solute in a given mass of solvent.

Molality of solution is given by the formula given below:

In the given solid solution, aluminium is the solvent while copper is the solute.

Mass of solvent = 867 g = 0.867 Kg

Moles of solute = mass/molar mass

molar mass of copper = 64.0 g

moles of solute = 14.9/64 = 0.233 moles

Molality of solution = 0.233 mol/0.867 kg = 0.27 mol/kg.

Therefore, the molality of a solid solution containing 867 g of aluminum and 14.9 g of copper is 0.27 mol/kg.

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Explanation:

is b or c but i think asnwer is b

The correct statement is " Models are used to explain how something works."

To introduce specific content, models might be employed. A model can help students learn crucial words and create a setting in which they can investigate pertinent processes.

Models can be used to improve explanations, promote discussion, make predictions, present graphical images of abstract concepts, and generate mental models in research.

Therefore, Models are used to explain how something works .

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Two isomeric monobromination products should result from the allylic bromination of methylene cyclohexane, according to expectations. The final product will be 1-(bromomethyl)cyclohexene.

N-Bromosuccinimide, also known as NBS, is a chemical reagent utilized mostly in organic chemistry's electrophilic addition, electrophilic substitution, and radical substitution processes. It is regarded as an easy way to get bromine radicals. NBS interacts with the substance in an aqueous solution in alkenes to produce bromohydrins as the end result.

Allylic bromination is defined as the reaction employing NBS that results in the substitution of a bromine atom for hydrogens on a carbon next to a double bond.

Following  drawing of the methylene cyclohexane extended structure, the reaction will be carried out using the reagent NBS.

The IUPAC name of the product is 1-(bromomethyl)cyclohexene.

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With no change in temperature or amount of gas, the pressure of ideal gas approximation is 4.83 atm.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

V1 = 5.1 L

V2 = 9.29 L

P2 = 2.65

When the initial and final temperature is the same, we can use the ratio of pressure and volume as

P1 . V1 = P2 . V2

P1 . 5.1 = 2.65 . 9.29

P1 = 4.83 atm

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95 marks in 100 means you scored 95 % in homework.  Similarly 83% in labs and 77% in exams. Thus the weighted average will be 85 %.

Average of a set of values is their sum divided by their number. The average of a set with even number of values, will be their sum divided by number where the average comes in a range of the set of values.

Average of odd number of values will be the exact middle value of the set.

Given that marks in homework out of 100 = 95

labs = 83

exams = 77.

Thus, average of your marks percentage = (77 + 83 + 95)/3

                                                                     = 85%.

Therefore, the average percentage of the marks is 85%.

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Explanation:

C = Xv

v = C/X = (3.00 * 10^8 m/s) / (5.88 * 10^8 m)

= 0.51 Hz.

ch3ch2ch2s-sch2ch2ch3 is the correct answer

What is Oxidation?

Oxidation is a chemical reaction that involves the loss of electrons by an atom, molecule, or ion. In an oxidation reaction, the oxidation state of the species undergoing oxidation increases, while the oxidation state of the species undergoing reduction (the opposite of oxidation) decreases. Oxidation reactions are important in many areas of science and technology, including biology, where they are involved in cellular respiration, energy production, and the generation of reactive oxygen species. In chemistry, oxidation reactions are used in the production of many industrial chemicals and in the purification of metals.In general, oxidation reactions can be described as the transfer of electrons from one species to another. For example, in the oxidation of iron, electrons are transferred from the iron atom to oxygen, resulting in the formation of iron oxide. The process of oxidation can be reversed through a reduction reaction, which involves the gain of electrons by an atom, molecule, or ion.

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Explanation:

32.0g×1 mole/79.9g = 0.401 mole Br

ratio 1:2

MgBr2

9g × 1mole/24.31= 0.20 mole Mg

Answer:

Volume = 35.2×220×6.0 = 46464 centimeters³

Explanation:

Answer: Magnesium

Explanation:

Sodium, number of electrons= 11

Aluminum, number of electrons= 13

Magnesium, number of electrons= 12. which is greater than sodium but less than aluminum.

Using the information provided, we can determine that the compound is S2F10, which has 25.24% by mass of sulfur in a fluorine and sulfur combination.

What is a substance made up of fluorine and sulfur?

Several distinct compounds, such as sulfur hexafluoride and sulfur tetrafluoride, are created when sulfur and fluorine are combined. 4.45 g of fluorine and 1.25 g of sulfur are produced during the breakdown of a sample of sulfur hexafluoride.

What kind of bond results from the union of fluorine F and sulphur S?

S has an electronegativity of 2.58, whereas F has an electronegativity of 3.98. The difference in electronegativity between the two atoms is 1.40. We define a bond formed between two atoms as polar covalent when the difference in electronegativity is between 0.5 and 1.6.

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Answer:

Percent error in meter stick measurement is 5.5%.

Explanation:

Given data:

Measured value = 25 cm

Accepted value = 23.7 cm

percent error = ?

Solution:

Subtract the accepted value from measured value divided by accepted value multiply by 100.

Formula:

(measured value - accepted value / accepted value ) × 100

Now we will put the values.

(25 cm - 23.7 cm/23.7 cm ) × 100

1.3 cm/23.7 cm ) × 100

0.055× 100

5.5%

Percent error in meter stick measurement is 5.5%.

Answer: Technician B

Explanation:

Technician B is correct. The freezing point of a substance is the temperature at which the substance changes state from a liquid to a solid.

Technician A is incorrect. On the other hand, the melting point of a substance is the temperature at which the substance changes state from a solid to a liquid.

Answer:

an ideal gas does not exist except as a conceptual notion, an ideal. Physicists and chemists idealized the behaviour of real gases so that they could explain these phenomena. Under conditions of low pressure and high temperature, all gases behave like real gases, even gases such as UF6 .

Answer:

True

Explanation: