Fe2O3 + _H2SO4 → _Fe2(SO4)3 + __H2O what are the coefficients

3.27 grams of Cu(OH)₂ will precipitate when excess KOH solution is added to 65.0 mL of 0.514 M CuSO₄ solution.

What is CuSO₄ and how is it made?

CuSO₄ is the chemical formula for copper(II) sulfate. It is a compound composed of copper (Cu) ions and sulfate (SO₄) ions. Copper(II) sulfate is commonly produced by the reaction between copper oxide (CuO) or copper metal (Cu) with sulfuric acid (H₂SO₄). After the reaction, copper(II) sulfate is typically obtained as a solid salt that can be further purified and crystallized from the solution.

1.   Calculate the moles of CuSO₄:

Moles of CuSO₄ = volume (L) × concentration (M)

Moles of CuSO₄ = 0.065 L × 0.514 M

Moles of CuSO₄ = 0.03361 mol

2.   Use the stoichiometry of the balanced equation to find the moles of Cu(OH)₂:

From the balanced equation, we see that 1 mole of CuSO₄ produces 1 mole of Cu(OH)₂

Therefore, the moles of Cu(OH)₂ formed is also 0.03361 mol.

3.   Convert moles of Cu(OH)₂ to grams:

Molar mass of Cu(OH)₂ = atomic mass of Cu + 2 × atomic mass of O + 2 × atomic mass of H

Molar mass of Cu(OH)₂ = 63.55 g/mol + 2 × 16.00 g/mol + 2 × 1.01 g/mol

Molar mass of Cu(OH)₂ = 97.55 g/mol

Grams of Cu(OH)₂ = moles of Cu(OH)₂ × molar mass of Cu(OH)₂

Grams of Cu(OH)₂ = 0.03361 mol × 97.55 g/mol

Grams of Cu(OH)₂ = 3.27 g

Therefore, 3.27 grams of Cu(OH)₂ will precipitate when excess KOH solution is added to 65.0 mL of 0.514 M CuSO₄ solution.

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Answer:

Three half-lives

Explanation:

12.5% is one-eighth. One eighth is the cube of one half, so it would take three half-lives to reduce a reactant's concentration to 12.5%

Three half-lives are required for the concentration of reactant to decrease to 12. 5% of its original value.

Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.

In the given example 12.5 % is 1/8  and three times 1/2 that is 1/2×1/2×1/2=1/8 , hence  three half lives are  required for the concentration of reactant to decrease to 12. 5% of its original value.

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Answer:

- Water from beaker will move to the tube

Explanation:

Total percentage of water in the beaker;

\( = { \tt{100\% - 5\%}} \\ = { \tt{95\%}}\)

Total percentage of water in dialysis tube;

\({ \tt{ = 100\% - 15\%}} \\ = { \tt{85\%}}\)

So, there is much water concentration in the beaker than the dialysis tubing, this causes a determined percentage of water to diffuse to the tubing, and determined percentage of salt to move from tubing to the beaker.

Percentage of water moving to tubing;

\({ \tt{ = 95\% - 85\%}} \\ = { \tt{10\%}}\)

Percentage of salt moving from tubing to beaker

\({ \tt{ = 15\% - 5\%}} \\ { \tt{ = 10\%}}\)

Saturated fats are usually straight chains, while unsaturated fats are often kinked or bent. Saturated fats are usually solid at room temperature, whereas unsaturated fats are usually liquid at room temperature.

A straight-chain carbon arrangement indicates that the molecules are closely packed together, resulting in a more solid substance at room temperature. A straight carbon chain has fewer points of unsaturation than a bent carbon chain, indicating that it is a saturated fat.

In contrast, a bent chain is more likely to have points of unsaturation or double bonds, which can cause it to take on a bent or kinked appearance. The more unsaturated a fat is, the less solid it is at room temperature, making it more liquid.

This is why unsaturated fats are frequently liquid at room temperature. Since the fatty acid chains in unsaturated fats are not packed as closely together, they do not solidify as quickly as saturated fats. They also have a lower melting point since they are less tightly packed.

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The compound formed from calcium and dihydrogen phosphate is known as calcium dihydrogen phosphate or calcium phosphate monobasic.

Its chemical formula is Ca(H2PO4)2, which indicates that it contains one calcium ion (Ca2+) and two dihydrogen phosphate ions (H2PO4-). This compound is commonly used as a food additive, fertilizer, and as a source of phosphoric acid. It is also found naturally in some minerals and rocks. Calcium dihydrogen phosphate is an important compound in biological systems as it plays a role in bone and tooth formation, cell signaling, and energy metabolism.
The formula representing the compound formed from calcium and dihydrogen phosphate is Ca(H2PO4)2. This compound is called calcium dihydrogen phosphate. It is an ionic compound, where calcium is the cation (Ca2+) and dihydrogen phosphate is the anion (H2PO4-). In this compound, one calcium ion is bonded to two dihydrogen phosphate ions, maintaining charge neutrality. Calcium dihydrogen phosphate is often used in fertilizers and as a food additive.

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Answer:

True

Explanation:

Percent error is the difference between a measured value and the exact value of any quantity under observation. It is calculated as the percentage of the exact or known value.

Answer:

The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.

Explanation:

A compound is where two or more elements are chemically joined. This means that the atoms lose its individuals properties and have different properties from the elements it is combined with. Salt and sugar are simple examples of this.

Once chemically joined, a compound cannot be physically separated like picking off raisin off a raisin cookie. It must be separated through another chemical change.

There is also a fixed ratio that atoms combine due to the nature of electrons and individual elemental properties.

Answer:

C

Explanation:

because 37 does not end with 5 or 0, so it'd be harder to see if the water temperature is accurate if your thermometer goes up by 5s or 10s. And using D, the one that goes up by 20s is out of the question, it'd be too difficult to read. Using a thermometer that goes up by 1s is just best because you can be positive when the water is at 37°C

Answer:

the second stage of cell division. its between prophase and anaphase during the chromosomes become attached to spindle fibers.

The phosphate group attached to the 5' carbon of the sugar on one nucleotide forms an ester bond with the free hydroxyl on the 3' carbon of the next nucleotide.

Answer:

Follow these steps.

1. Fill the matchbox with pebbles. Weigh the matchbox with the pebbles inside. Record that weight.

2. Tie the string to the box. Allow the string to hang over the edge of the table.

3. Tie the other end of the string to a corner of the plastic bag, leaving an opening to put in coins.

4. Add coins one by one until the box is pulled off the table.

5. Count and record the number of coins and the weight of the bag with the coins in it.

6. Lay the round sticks on the table about 1 inch apart and about 2 inches from the edge of the table.

7. Put the matchbox on the rollers farthest from the edge of the table.

8. Now add coins one by one to the bag until the box is pulled off the table.

9. Count and record the number of coins and the weight of the bag with the coins in it.

10. Repeat the experiment. Determine your margin of error if your results vary. For accuracy, repeat the experiment if desired.

11. Using the equation for the coefficient of friction in the text above, determine the coefficient of friction for the matchbox in each experiment. Include this data in your summary.

Explanation:

I think this is useful

please make me as breainlest

Answer:Follow these steps.

1. Fill the matchbox with pebbles. Weigh the matchbox with the pebbles inside. Record that weight.

2. Tie the string to the box. Allow the string to hang over the edge of the table.

3. Tie the other end of the string to a corner of the plastic bag, leaving an opening to put in coins.

4. Add coins one by one until the box is pulled off the table.

5. Count and record the number of coins and the weight of the bag with the coins in it.

6. Lay the round sticks on the table about 1 inch apart and about 2 inches from the edge of the table.

7. Put the matchbox on the rollers farthest from the edge of the table.

8. Now add coins one by one to the bag until the box is pulled off the table.

9. Count and record the number of coins and the weight of the bag with the coins in it.

10. Repeat the experiment. Determine your margin of error if your results vary. For accuracy, repeat the experiment if desired.

11. Using the equation for the coefficient of friction in the text above, determine the coefficient of friction for the matchbox in each experiment. Include this data in your summary.

Explanation:

Therefore, the volume of CO2 produced at a pressure of 2.50 atm and a temperature of 175°C is 12.9 L.

Volume is a measure of the amount of space occupied by a three-dimensional object. It is typically measured in cubic units such as cubic meters, cubic centimeters or cubic feet. To calculate the volume of an object, you typically need to measure its three dimensions, such as length, width, and height. The formula for calculating the volume of a rectangular object is V = l × w × h, where V is the volume, l is the length, w is the width, and h is the height. For other shapes, the formula may be different, but it will always involve some combination of length, width, and height. Volume is an important concept in many fields, including physics, chemistry, engineering, and architecture. It is used to measure the capacity of containers, the amount of material needed to fill a space, the displacement of fluids, and many other applications.

Here,

To solve this problem, we can use the ideal gas law to calculate the number of moles of each gas involved in the reaction, and then use stoichiometry to determine the amount of CO2 produced.

Step 1: Calculate the number of moles of ethane (C2H6) gas and oxygen (O2) gas present in the mixture.

For ethane:

PV = nRT

n = (PV)/(RT)

n = (1.25 atm)(2.80 L) / (0.0821 L·atm/mol·K)(298 K) (using 25°C = 298 K)

n = 0.129 mol

For oxygen:

PV = nRT

n = (PV)/(RT)

n = (1.05 atm)(32.0 L) / (0.0821 L·atm/mol·K)(305 K) (using 32°C = 305 K)

n = 1.18 mol

Step 2: Write the balanced chemical equation for the reaction between ethane and oxygen.

C2H6 + 3O2 → 2CO2 + 3H2O

Step 3: Use stoichiometry to determine the number of moles of CO2 produced.

From the balanced equation, we can see that 1 mole of ethane reacts with 3 moles of oxygen to produce 2 moles of CO2. Therefore, the number of moles of CO2 produced is:

n(CO2) = (2/3) n(O2) = (2/3)(1.18 mol) = 0.79 mol

Step 4: Calculate the volume of CO2 produced at the given conditions of temperature and pressure.

Using the ideal gas law:

PV = nRT

V = (nRT)/P

V = (0.79 mol)(0.0821 L·atm/mol·K)(448 K)/(2.50 atm) (using 175°C=448 K)

V = 12.9 L

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C.  1s22s22p33s1. The 1s22s22p33s1 is the electron configuration of an excited state of an oxygen atom.

When an electron is stimulated and leaps into a higher orbital, the atom's excited-state configuration differs from its normal configuration. Oxygen has the excited-state electron configuration 1s22s22p33s1.

An atom's excited state is one in which it has more energy than its ground state. In this case, one or more electrons are not at their lowest energy state. Electrons have advanced to a higher energy level by using external energy.

Energized-state absorption is the process of a system (such as an atom or molecule) being excited from one excited state to a higher-energy excited state by absorbing a photon (ESA). Only when an electron has already been excited from the ground state to a lower excited state is excited-state absorption conceivable.

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Answer:

carbon

Explanation:

Answer:

carbon was discovered in space before on earth

Answer:

A

Explanation:

The bubbles formed from the plants are always oxygen. The photosynthetic reaction taking place in the plants release oxygen molecules.

Photosynthesis is the biochemical process of synthesizing chemical energy by green plants with the aid of light energy. They store this chemical energy in the form of glucose.

In photosynthetic reaction, water and carbon dioxide are combined to produce glucose and oxygen gas. The bubbles formed in the reaction is oxygen gas.

This process is an event in the carbon cycle to balance the amount of carbon dioxide in the atmosphere and in living matter. Photosynthesis provide the sufficient oxygen for respiration for animals. Hence, option A is correct.

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Answer:

in a sold the particles are in a fixed position and can only vibrate on the spot but when it changes into a liquid the energy is used to weaken the bonds so there are weak forces of attraction between the particles, all particles are still touching each other but are now free to move around. Ina gas all the bonds are broken, the gas particles are free to move around anywhere and the more collisions there are, the more the pressure increases

If 1.5 moles of C₃H₈ react according to the balanced equation, 4.5 moles of CO₂ will be produced.

In the balanced equation, the coefficients in front of the molecules indicate the molar ratio. The coefficient for CO₂ is 3, which means that for every 1 mole of C₃H₈, 3 moles of CO₂ are produced.

The balanced equation shows that 1 mole of C₃H₈ reacts to produce 3 moles of CO₂. So, if 1.5 moles of C₃H₈ react, we can calculate the number of moles of CO₂ produced using a simple ratio.

1 mole of C₃H₈ reacts to produce 3 moles of CO₂.

Therefore, 1.5 moles of C₃H₈ will produce (1.5 moles of C₃H₈) x (3 moles of CO₂/1 mole of C₃H₈)

= 4.5 moles of CO₂.

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The percent by mass of acetic acid in the vinegar is 2.33%.

Below are the steps to solve the given problem using the data table given below:

Step 1: Calculate the mass of the vinegar. Given,Mass of flask and vinegar solution- 25.17gMass of flask- 15.12gMass of vinegar solution = Mass of flask and vinegar solution - Mass of flask= 25.17 g - 15.12 g= 10.05 g

Step 2: Calculate the moles of NaOH used in the titration.Molarity of NaOH solution is 0.1 M.Moles of NaOH = Molarity × Volume of NaOH usedMoles of NaOH = 0.1 M × 39.00 mL (since the initial volume of NaOH is 0.00 mL)Moles of NaOH = 0.0039 moles

Step 3: Determine the moles of acetic acid used in the reaction.The balanced chemical equation for the reaction between NaOH and acetic acid (the main component of vinegar) is given below:CH3COOH + NaOH → CH3COONa + H2OMoles of NaOH = Moles of CH3COOH (since they react in a 1:1 ratio)Moles of CH3COOH = 0.0039 moles

Step 4: Calculate the mass of acetic acid used in the reaction.Molar mass of acetic acid is 60.05 g/mol.Mass of CH3COOH = Moles of CH3COOH × Molar mass of CH3COOH= 0.0039 moles × 60.05 g/mol= 0.234 gStep 5: Calculate the percent by mass of acetic acid in the vinegar.Percent by mass of acetic acid = (Mass of CH3COOH / Mass of vinegar solution) × 100%= (0.234 g / 10.05 g) × 100%= 2.33%.

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The copper electrode is the anode in the cell because it is the positive electrode.

This is because the anode of a cell is the electrode where oxidation occurs, and when a positive potential is recorded, electrons are being lost from the anode, which is the copper electrode in this case. In other words, the copper electrode is the source of electrons in this cell, and so it is the anode.

The cathode of the cell is the negative electrode, which is the electrode where reduction occurs, and electrons are being gained. In this case, the cathode is the electrode receiving the electrons from the anode, or the copper electrode. The electrons flow from the anode to the cathode and the potential difference between the two determines the current of the cell.

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The limiting reactant will be HCl.

They limit the amount of products produced in reactions.

From the equation, the mole ratio of Mg to HCl is 1:1.

Mole of 4.00 g mg = 4/24.3 = 0.1646 moles

Mole of 3.2 g HCl = 3.2/36.458 = 0.0878 moles

Thus, Mg is in excess while HCl is limiting in availability.

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Answer:

HCI , Excess reactant is Mg , and 4.18 g MgCl

Answer:

An alloy

Explanation:

srry if its wrong but i hope this helps!

Answer:

An alloy

Explanation:

they get closer together

Answer:

True

Explanation:

Due to elasticity, a bar of lead is more easily bent than a bar of aluminum of the same size.

A bar of lead is more easily bent than a bar of aluminum of the same size because of its less hardness and elasticity. If an object is more elastic, it will bent easily while on the other hand, if an object have less elasticity then it can't be bend. Elasticity is the ability of a body to return to its original shape and size when the forces that are causing the deformation are removed from it.

So we can conclude that due to elasticity, a bar of lead is more easily bent than a bar of aluminum of the same size.

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Answer:

When you don't have a complete reaction.

Explanation:

Happens a lot between a solvent and a solute. The solute may not bind well with the solvent I.e. water.

Answer:

\(\boxed{\boxed {\sf 23.0 \ g \ Ba(NO_3)_2}}\)

Explanation:

We are asked to find the mass of 5.30 ×10²² formula units of barium nitrate.

First, we convert formula units to moles using Avogadro's Number or 6.022×10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are formula units of barium nitrate.

Set up a conversion factor using Avogadro's Number.

\(\frac{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}{ 1 \ mol \ Ba (NO_3)_2}\)

We are converting 5.30×10²² formula units, so we multiply by this value.

\(5.30 \times 10^{22} \ formula \ units \ Ba(NO_3)_2 *\frac{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}{ 1 \ mol \ Ba (NO_3)_2}\)

Flip the conversion factor so the units of formula units of barium nitrate cancel.

\(5.30 \times 10^{22} \ formula \ units \ Ba(NO_3)_2 *\frac{ 1 \ mol \ Ba (NO_3)_2}{6.022 \times 10^{23} \ formula \ units \ Ba(NO_3)_2}\)

\(5.30 \times 10^{22} *\frac{ 1 \ mol \ Ba (NO_3)_2}{6.022 \times 10^{23}}\)

\(\frac{5.30 \times 10^{22} }{6.022 \times 10^{23}} \ mol \ Ba(NO_3)_2\)

\(0.0880106276984 \ mol \ Ba(NO_3)_2\)

Next, convert moles to grams using the molar mass. The molar mass of barium nitrate is 261.35 grams per mole.

Set up a conversion factor using the molar mass.

\(\frac{ 261.35 \ g \ Ba(NO_3)_2} {1 \ mol \ Ba(NO_3)_2}\)

Multiply by the number of moles we calculated.

\(0.0880106276984 \ mol \ Ba(NO_3)_2 *\frac{ 261.35 \ g \ Ba(NO_3)_2} {1 \ mol \ Ba(NO_3)_2}\)

The units of moles of barium nitrate cancel.

\(0.0880106276984*\frac{ 261.35 \ g \ Ba(NO_3)_2} {1}\)

\(23.001577549 \ g \ Ba(NO_3)_2\)

If this is rounded to the tenths place, the 0 in the hundredth place tells us to leave the 0 in the tenths place.

\(23.0 \ g \ Ba(NO_3)_2\)

The mass of 5.30 ×10²² formula units of barium nitrate is approximately 23.0 grams.

Answer:

1.74 g/mL

Explanation:

Step 1: Given data

Mass of magnesium: 4.80 g

Volume of water displaced: 2.76 mL

Step 2: Calculate the volume of the piece of magnesium

The volume of the piece of magnesium is equal to the volume of water displaced in the graduated cylinder.

Step 3: Calculate the density of magnesium

The density of magnesium is equal to its mass divided by its volume.

ρ = m / V

ρ = 4.80 g / 2.76 mL

ρ = 1.74 g/mL