A sample of brass contains 3.56 g of copper, Cu. How many moles of copper does the sample contain? The atomic mass of copper is 63.546 g/mol.
a) 226 moles
b) 0.0560 moles
c) 17.9 moles
d) 67.1 moles

Answer: A chemical change in step one and a physical change in step two. ( So A) on edu

Explanation:

Answer:

A. a chemical change in step 1 and a physical change in step 2

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Yes, the force of compaction in powder metallurgy affects final part properties. During the process of powder metallurgy, metal powders are used to create a final product. The metal powder particles must be compressed under pressure to remove porosity, enhance density, and provide mechanical strength.

This compaction step is critical since the powder particles can only bond when they are sufficiently close to each other. Therefore, sufficient pressure is required to create strong bonding between the particles. When a force is applied to the metal powders, it causes the powder particles to deform and plastically flow, allowing them to fill up the available spaces.

As a result, the force of compaction plays a vital role in determining the final part's properties. By controlling the force, it is possible to change the density, grain size, and microstructure of the metal. The mechanical properties of a part, including its hardness, tensile strength, and ductility, are all affected by the compaction force.

Higher compaction forces increase the density of the metal, which increases its mechanical strength. However, too high of a compaction force can cause the material to become brittle, reducing its ductility. Therefore, the force of compaction in powder metallurgy must be carefully controlled to achieve the desired final product properties.

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Answer:

False

Explanation:

ok?

When 14. 8 grams of hydrogen is reacted with 34. 8 grams of oxygen. then water formed is 39.1935 grams.

A process that leads to the chemical transformation of one set of chemical substances to another is called a chemical reaction .

2H2 + 02 → 2H20

Given, mass of hydrogen = 14.8 grams

and we know molar mass of hydrogen = 2.02 g/mole

given, mass of oxygen = 34.8 grams

we know molar mass of oxygen = 32 g/mole

As we know that : moles is equal to mass / Molar mass

then, moles of hydrogen = 14.8g/ 2.02 g/mole = 7.33 moles

and moles of oxygen = 34.8g / 32g/mole = 1.0875 moles

For 2 moles hydrogen consumed, 1 mole of oxygen is needed.

This implies that oxygen is the limiting reagent and will be consumed completely.

We see that for 2 moles of H2 consumed,  1 mole of O2 is needed to produce 2 moles of H2O.

For 1.0875 moles of oxygen consumed, moles of H2O produced will be 2.175

We know, mass of H2O = moles of H2O * Molar mass of H2O

Hence, mass of H2O = 2.175 moles * 18.02 g/moles

Therefore, mass of H2O =39.1935 grams

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Answer:

137.9035 g

Explanation:

1 mole of copper in grams is 63.55 g

2.17 mole of Cu weighs 137.9035 g (63.55x2.17)

The given statement is a chemical equation that describes the reaction of Copper metal with hot concentrated sulfuric acid solution to form aqueous copper(II) sulfate, sulfur dioxide gas, and water.

It can be represented in the form of a balanced chemical equation as shown below:Cu + 2H₂SO₄ → CuSO₄ + SO₂ + 2H₂OIn this chemical equation, Cu represents Copper metal, H₂SO₄ represents concentrated sulfuric acid, CuSO₄ represents aqueous copper(II) sulfate, SO₂ represents sulfur dioxide gas and H₂O represents water. The equation is balanced as the number of atoms of each element is equal on both sides of the equation.

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Therefore, the sets of quantum numbers that are incorrect in the hydrogen atom are (n=0, l=0, ml=0, ms=+1/2), (n=3, l=3, ml=0, ms=-1/2), (n=2, l=0, ml=2, ms=+1/2), and (n=4, l=2, ml=0, ms=0).

In the hydrogen atom, there are certain rules and restrictions on the values of quantum numbers. The sets of quantum numbers that are not allowed in the hydrogen atom are:

1. (n=0, l=0, ml=0, ms=+1/2):

The principal quantum number (n) cannot be zero.

It must have a positive integer value.

2. (n=3, l=3, ml=0, ms=-1/2):

The azimuthal quantum number (l) cannot be greater than or equal to the principal quantum number (n).

Therefore, l cannot be 3 when n is 3.

3. (n=2, l=0, ml=2, ms=+1/2):

The magnetic quantum number (ml) must satisfy the condition -l ≤ ml ≤ l.

In this set, ml is 2, which exceeds the allowed range (-l ≤ ml ≤ l) when l is 0.

4. (n=4, l=2, ml=0, ms=0):

The spin quantum number (ms) cannot be zero.

It must have either a positive or negative value of +1/2 or -1/2.

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Answer: fluprine

Hope this help

O2- Option B is correct

Explanations:

Calcium atom is a group 2 elements that gives out two electrons in order to form a stable configuration and a Ca2+ ion. These two electrons are transferred to an atom that required two electrons to complete its outer shell.

Since oxygen required 2 electron to attain its octet configuration, hence they can easily accepts the two electrons from calcium atoms to form CaO which is composed of Ca2+ and O2- ions in the ratio of one Ca2+ ion to one O2− ions.

Answer:

Their weight.

Explanation:

Weight is the measurement of gravity pushing you down, so with less gravity there would be less weight.

The astronauts expect their weight to be different on the Moon

Weight is simply defined as the gravitational pull of the earth on an object. It is measured in Newton.

The weight of an object varies with location because of gravity.

The weight of an object is related to it's mass according to the following equation:

Weight = mass × Acceleration due to gravity

Since the gravity of the Moon is lesser than that of the Eearth, the astronauts certainly knew that their weight will be different on the Moon.

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The bond strength in F2- is expected to be weaker than in the F2 molecule. The additional electron in F2- introduces repulsion, destabilizing the bond and reducing its strength.

The F2- ion will have an additional electron compared to the F2 molecule. Using molecular orbital theory, we can determine the electron configuration of F2- as \((σ1s)^2(σ*1s)^2(σ2s)^2(σ*2s)^2(π2p)^4(π*2p)^4.\)

Bond order is calculated by subtracting the number of antibonding electrons from the number of bonding electrons and dividing the result by 2. In the case of F2-, there are 10 bonding electrons and 8 antibonding electrons. Therefore, the bond order is [(10 - 8) / 2] = 1.

The F2- ion has unpaired electrons, making it paramagnetic.

The bond length in F2- is expected to be longer than in the F2 molecule. This is due to the addition of an extra electron, which increases electron-electron repulsion, resulting in an elongation of the bond.

Note: It is important to refer to the specific molecular orbital diagram provided in Figure 10.13 of the mentioned textbook for precise information and calculations.

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Answer:

1. Mass of the blue ball is 5 kg.

2. Mass of the red ball is 3.75 kg.

Explanation:

The following data were obtained from the question:

For the blue ball:

Force (F) = 15 N

Acceleration (a) = 3 m/s²

Mass (m) =.?

Force the red ball:

Force (F) = the same with that of the blue ball = 15 N

Acceleration (a) = 4 m/s²

Mass (m) =.?

1. Determination of the mass of the blue ball.

Force (F) = 15 N

Acceleration (a) = 3 m/s²

Mass (m) =.?

Force (F) = mass (m) × acceleration (a)

F = ma

15 = m × 3

Divide both side by 3

m = 15/3

m = 5 kg

Therefore, the mass of the blue ball is 5 kg

2. Determination of the mass of the red ball.

Force (F) = 15 N

Acceleration (a) = 4 m/s²

Mass (m) =.?

Force (F) = mass (m) × acceleration (a)

F = ma

15 = m × 4

Divide both side by 4

m = 15/4

m = 3.75 kg

Therefore, the mass of the blue ball is 3.75 kg

The electrical charge of the atom is zero. This is because the number of protons, which carry a positive charge, is equal to the number of electrons, which carry a negative charge. The neutrons, which carry no charge, do not contribute to the electrical charge of the atom. Therefore, the atom has a neutral charge overall.

An atom has three types of subatomic particles: protons, neutrons, and electrons. Protons have a positive electrical charge (+1), electrons have a negative electrical charge (-1), and neutrons have no electrical charge (0).
In your atom, there are:
- 5 protons, each with a charge of +1
- 6 neutrons, each with a charge of 0
- 5 electrons, each with a charge of -1
To find the total electrical charge of the atom, you can add the charges of all the subatomic particles together:
(5 protons × +1 charge/proton) + (6 neutrons × 0 charge/neutron) + (5 electrons × -1 charge/electron) = 5 + 0 - 5 = 0
The total electrical charge of this atom is 0. This means the atom is neutral, as the number of positive charges (protons) equals the number of negative charges (electrons).

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0.025 moles of hydroxide ions (OH-) are there in 25.0 mL of 1.00 M NaOH.

We may use the following formula to calculate the number of moles of hydroxide ions (OH-) in 25.0 mL of 1.00 M NaOH:

moles = concentration x volume

First, we need to convert the volume from milliliters to liters, which can be done by dividing by 1000:

25.0 mL = 25.0/1000 = 0.025 L

plugging in the values:

moles of NaOH = concentration x volume = 1.00 mol/L x 0.025 L = 0.025 mol

Since NaOH dissociates completely in water to produce one mole of hydroxide ions for every mole of NaOH, we have:

moles of OH- = 0.025 mol

Therefore, there are 0.025 moles of hydroxide ions (OH-) in 25.0 mL of 1.00 M NaOH.

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Answer:

159.6882 grams

Explanation:

Cerebrospinal fluid of the central nervous system and synovial fluid of joint capsules are both examples of extracellular fluid

Synovial fluid is a viscous solution found in cavities of synovial joints. The principal role of synovial fluid is to reduce friction between articular cartilages of synovial joints during movement.

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Answer:

Explanation:

approx 30%

Reaction

C₃H₄ + 4O₂ → 3CO₂ + 2H₂O

20% purity = 20% x 200 = 40 g

mole C₃H₄ = mass : molar mass = 40 : 40 g/mole = 1

mole H₂O from reaction coefficient (C₃H₄ limiting reactant) = 2/1 x 1 mole = 2 mole

mass H₂O = mole x molar mass = 2 x 18 g/mole = 36 g

for 60% yield, H₂O produced  = 60% x 36 g = 21.6 g

Answer:

I believe the answer is C.

Answer:

C

Explanation:

green house gases effects increases global warming

Answer:

A BIG DI*CK

Explanation:

The molecule that delivers the acetyl group derived from the pyruvate produced in glycolysis to the citric acid cycle is coenzyme A (CoA).

Coenzyme A (CoA) is a molecule involved in several metabolic pathways that occur within cells. The molecule is important in the metabolism of carbohydrates, lipids, and proteins. In particular, CoA is involved in the process of transferring acyl groups. The citric acid cycle is a metabolic pathway that takes place in the mitochondria of eukaryotic cells. The pathway involves the oxidation of acetyl groups, which are derived from the breakdown of glucose and other biomolecules. The acetyl group is attached to CoA to form acetyl-CoA, which is then delivered to the citric acid cycle. Acetyl-CoA is converted into citrate, which undergoes a series of reactions to produce energy in the form of ATP. The citric acid cycle is an important part of cellular respiration, which is the process by which cells obtain energy from organic molecules.

Therefore, coenzyme A (CoA) is the molecule that delivers the acetyl group derived from the pyruvate produced in glycolysis to the citric acid cycle.

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Option C ; At any of an infinite number of distances, depending on its energy .

Bohr described the Hydrogen atoms in terms of an electron moving in a circular route about a nexus. He supposed that the electron was confined to certain pathways characterized by separate powers.It explains the emigration and absorption spreads of atomic hydrogen and hydrogen- suchlike ions with low atomic numbers. It was the first model to introduce the generality of a quantum number to describe atomic countries and to postulate quantization of electron pathways in the tittles. Bohr’s model is an important step in the development of quantum mechanics, which deals with multitudinous- electron particles. It was the first model to introduce the conception of a amount number to describe infinitesimal countries and to hypothecate quantization of electron routeways in the snippet. Bohr’s model is an important step in the development of amount mechanics, which deals with numerous- electron tittles.

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Answer:

4:3

Explanation:

Answer:

4:3 is the correct answer took the quiz.

Explanation:

Answer and Explanation:

Your mass is the same no matter where you go in the universe; your weight, on the other hand, changes from place to place. Mass is measured in kilograms; even though we usually talk about weight in kilograms, strictly speaking, it should be measured in newtons, the units of force. (according to cosmicmagazine.com)(not my writing or explanation)

The pH of the sodium hydroxide (NaOH) solution is 11.7.

Sodium hydroxide is a strong base and has a very high pH.

To calculate the pH of the solution, you must first calculate the molarity of the solution. To do this, divide the mass of sodium hydroxide by its molar mass, then divide that number by the volume of the solution.

Molarity = (0.40 g NaOH) / (40 g/mol) / (2.0 L) = 0.005 M = 5 x 10⁻³M.

The pH of a strong base is equal to its pOH plus 14. Since pOH is equal to -log[OH-], we can use the molarity of the solution to calculate the pH.

pOH = -log(5 x 10⁻³ M) = 2.30= 11.7

Therefore, the pH of the solution is equal to 14 - 2.30 = 11.7.

Therefore, 0.40 g of sodium hydroxide (NaOH) pellets dissolved in water will create a solution with a pH of 11.7.

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i’m pretty sure it all of them!

ALL options above described can impact the wind patterns.

In conclusion, ALL options above described can impact the wind patterns.

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Answer:

.

Explanation:

The density of the sample x which is the ratio of the mass of the sample and the volume of water in the cylinder displaced is 4 g/cm³

Recall ::

Therefore, the density of the sample x is 4g/cm³

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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A complex, ML₆²⁺, is violet. The same metal forms a complex with another ligand, Q, that creates a weaker field.  MQ₆²⁺, be expected to show green color.

The ligands (attachment to a metal ion) are listed in the spectrochemical series according to the strength of their field. The series has been created by superimposing several sequences discovered through spectroscopic research because it is impossible to produce the full series by examining complexes with a single metal ion. The halides are referred to be weak-field ligands whereas the ligands cyanide and CO are strong-field ligands. Medium field effects are claimed to be produced by ligands like water and ammonia.

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The second quantum number, known as the "angular or orbital quantum number", describes the subshell and gives the magnitude of the orbital angular momentum through the relation. In chemistry and spectroscopy, ℓ = 0 is called an s orbital, ℓ = 1 a p orbital, ℓ = 2 a d orbital, and ℓ = 3 an f orbital.