How many grams of CaO can be produced using 3.9 moles CaCO3?1
CaCO3 --> 1CaO + 1CO *

Answer:

Sn is the oxidation agent and h2 is the reducing agent

Explanation:

Because oxidation agent means reduction which means the lose of oxygen and Sn lose oxygen.

While reduction agent means oxidation which also means the gain of oxygen and h2 gain oxygen.

I hope you understand my explanation if you need any help in chemistry I'm always here

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The general molecular formula for phenol is C6H5OH. It is an aromatic organic compound with a hydroxyl group bonded to a carbon atom of a cyclic structure. The ring structure has alternate double and single bonds. The formula of phenol is C6H5OH. Benzene has the formula C6H6. It is a hexagonal ring of six carbon atoms bonded with alternate single and double bonds. Each carbon atom in benzene has a bond with a hydrogen atom. In phenol, a hydroxyl group replaces one of the hydrogen atoms.

The reaction of CuCl2, HNO3, and AgNO3 is a redox reaction. In a redox reaction, one substance loses electrons and is oxidized, while another substance gains electrons and is reduced. In this reaction, CuCl2 is oxidized to Cu2+, HNO3 is reduced to NO, and AgNO3 is reduced to Ag.

The balanced equation for the reaction is:

CuCl2 + 2HNO3 + 2AgNO3 → Cu2+ + 2NO + 2AgCl

The products of the reaction are copper(II) ions, nitrogen monoxide gas, and silver chloride precipitate.

Here are some of the properties of phenol:

Phenol is a white crystalline solid that is soluble in water.

Phenol has a strong, characteristic odor.

Phenol is a mild acid.

Phenol is toxic and can cause burns to the skin and eyes.

Phenol is used in a variety of products, including disinfectants, antiseptics, and plastics.

Answer:

Explanation:

iron is element number 26 this means that it has 26 number of electron and proton in its atomic structure so its atomic number is 26

Answer:

B

Explanation:

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The total volume of the solution prepared by dissolving 48.0 grams of Ca(OH)₂ in enough water is 0.865 L

First, we shall obtain the mole of 48.0 grams of Ca(OH)₂. This is shown below:

Mole = mass / molar mass

Mole of Ca(OH)₂ = 48 / 74

Mole of Ca(OH)₂ = 0.649 mole

Finally, we shall obtain the total volume of the Ca(OH)₂ solution. Details below:

Volume = mole / molarity

Volume of solution = 0.649 / 0.750

Volume of solution = 0.865 L

Thus, we can conclude that the total volume of the solution is 0.865 L

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Answer:

A

Explanation:

Two specialized cells called 'guard cells' make up each stoma (stoma is singular for stomata). Plants have many stomata up to 400 per mm2 on their leaf surfaces and they are usually on the lower surface to minimize water loss.

The equilibrium constant, K, for the given reaction at 450 K is 4.33.

The equilibrium constant, K, for the given reaction is given by the Expression:

K = [Nocl]^2 / ([NO]^2 [Cl2])

Where [NO], [Cl2], and [Nocl] are the equilibrium partial pressures of the Respective gases.

At equilibrium, the partial pressures of NO, Cl2, and Nocl are 0.075 atm, 0.191 atm, and 0.35 atm, respectively.

Substituting these values in the expression for K, we get:

K = (0.35)^2 / ((0.075)^2 (0.191))

K = 4.33

Therefore, the equilibrium constant, K, for the given reaction at 450 K is 4.33.

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Answer:

C. Gases in the atmosphere prevent heat from escaping

Explanation:

Took one for the team and caught an L, C was the right answer

The greenhouse gases are known as the gases which absorb the infrared radiations and create greenhouse effect. Gases in the atmosphere prevent heat from escaping is the greenhouse effect. The correct option is C.

The process by which the radiations of the sun are absorbed by the green house gases and are not reflected back into the space is defined as the greenhouse effect. This insulates the earth and prevents it from freezing.

The green house effect increases the surface temperature of earth and also causes global warming.

Thus greenhouse effect is option C.

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Answer:

C.

Explanation:

because the heat From the nickel and the heat from the water are the same.

As a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.

To answer the question, we need to know what heat transfer is.

This is the flow of heat energy from one body to another over a temperature gradient.

Since a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there is no temperature gradient, since, both bodies are at the same temperature. Thus, no heat is transferred from the nickel to the water.

So, as a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.

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Answer: Hydrogen peroxide is a clear, odorless, and colorless liquid consisting of hydrogen and oxygen. It’s available in dilutions ranging from 3–90%, some of which are sometimes used as an alternative health remedy.

Advocates suggest that drinking a few drops of hydrogen peroxide diluted in water may help treat a range of illnesses, including diabetes and even some forms of cancer.

However, medical professionals warn against the dangers of this practice.

This article takes a look at the latest evidence to determine whether the benefits of drinking hydrogen peroxide outweigh its potential risks.

Explanation:

If you have ingested small amounts of 3% hydrogen peroxide, call your local poison control helpline for assistance. If you have swallowed larger amounts or higher concentrations, seek immediate medical assistance from an emergency room.

The bottom line

Hydrogen peroxide is touted as an alternative health remedy for a range of health conditions.

However, there’s no scientific evidence that drinking it yields any benefits. Plus, doing so is linked to dangerous side effects, including breathing problems, severe gut damage, and in some cases, death.

For these reasons, drinking any concentration or amount of hydrogen peroxide is not recommended.

Answer:

below is the value and on the left size is what your measuring

Explanation:

Answer iron's standard electrode potential is much much negative than gold therefore its reduction potential is more than gold. Its reduction potential is more it means that it is a good reducing agent then gold and a good redicing agent oxidises readily.

Explanation:

a.The balanced reaction between \(AlCl_3\) and NaOH is:

\(AlCl_3 + 3NaOH\) → \(Al(OH)_3 + 3NaCl\) is the balanced reaction.

b.58.55g of aluminum hydroxide will form? Work must be shown to earn credit

c. 6.50 g grams of aluminum hydroxide can be formed.

d.\(Al(OH)_3\) produced from NaOH is less, NaOH will be the limiting reagent. The amount of \(Al(OH)_3\) actually produced is  4.13 g.

An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation.

a.The balanced reaction between \(AlCl_3\) and NaOH is:

\(AlCl_3 + 3NaOH\) → \(Al(OH)_3 + 3NaCl\) is the balanced reaction.

b) Given mass of \(AlCl_3\) = 100.1 g

Molar mass of \(AlCl_3\) = 133.34 g/mol

moles of \(AlCl_3\) = 100.1 g ÷133.34 = 0.7507 moles

Based on the reaction stoichiometry:

1 mole of \(AlCl_3\) produces 1 mole of \(Al(OH)_3\)

# moles of \(Al(OH)_3\) = 0.7507 moles

Molar mass \(Al(OH)_3\) = 78 g/mol

Amount of \(Al(OH)_3\) produced = 0.7507 moles x 78 = 58.55g

c) Given mass of NaOH = 57.2 g

Molar mass of NaOH= 40 g/mol

moles of NaOH = 57.2 g ÷ 40 = 1.43 moles

Based on the reaction stoichiometry:

3 moles of NaOH produces 1 mole of \(Al(OH)_3\)

moles of \(Al(OH)_3\) produced = 1.43÷ 3 = 0.4766 moles

Molar mass \(Al(OH)_3\) = 78 g/mol

Amount of \(Al(OH)_3\) produced = 0.4766 78 = 6.50 g

d) Since moles of \(Al(OH)_3\) produced from NaOH is less, NaOH will be the limiting reagent. The amount of \(Al(OH)_3\) actually produced is 6.50 g.

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It took 14 years between the first man on the Moon and the first US woman in space.

The use of astronomy and space technology to explore outer space is known as space exploration. While astronomers use telescopes to explore space, physical exploration is carried out by both uncrewed robotic space probes and human spaceflight.

Understanding gravity, the magnetosphere, the atmosphere, fluid dynamics, and the geological evolution of other planets, for example, has come from studying the solar system.

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Answer:  There are

Explanation:

The temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K .

The temperature of a given gas can be calculated using the ideal gas law equation:

PV = nRT

Where;

1.4948 × 92.202 = 1.7379 × 0.0821 × T

137.82 = 0.142T

T = 137.82 ÷ 0.142

T = 965.69K

Therefore, the temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K.

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In the balanced equation \(2C_{2} H_{6}\) + \(7 O_{2}\) --> \(4 CO_{2}\) + \(6H_{2}O\) if 21 g of \(C_{2} H_{6}\) reacts with 32 g O₂, C₂H6 is the limiting reactant.

To determine the limiting reactant, we need to compare the amount of each reactant to the stoichiometric ratio in the balanced equation.

Let's calculate the number of moles for each reactant using their molar masses:

For \(C_{2} H_{6}\) (ethane):

Molar mass of \(C_{2} H_{6}\) = 2(12.01 g/mol) + 6(1.01 g/mol) = 30.07 g/mol

Number of moles of C₂H6 = 21 g / 30.07 g/mol ≈ 0.698 mol

For O₂ (oxygen):

Molar mass of O₂ = 2(16.00 g/mol) = 32.00 g/mol

Number of moles of O₂ = 32 g / 32.00 g/mol = 1.00 mol

Next, we compare the moles of each reactant to the stoichiometric ratio in the balanced equation:

2 moles of \(C_{2} H_{6}\) react with 7 moles of O₂ to produce 4 moles of CO₂ and 6 moles of H₂O.

From the given amounts, we have:

0.698 mol \(C_{2} H_{6}\) and 1.00 mol O₂.

Using the stoichiometric ratio, we can calculate the expected amount of CO₂ and H₂O produced for each reactant:

For C₂H6:

Expected moles of CO₂ = 0.698 mol C₂H6 * (4 mol CO₂ / 2 mol C₂H6) = 1.396 mol CO₂

For O₂:

Expected moles of CO₂ = 1.00 mol O₂ * (4 mol CO₂ / 7 mol O₂) ≈ 0.571 mol CO₂

Comparing the expected moles, we see that the calculated amount of CO₂ is greater when used \(C_{2} H_{6}\) as the limiting reactant. Therefore, the limiting reactant in this reaction is \(C_{2} H_{6}\).

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Answer:

D. adhesion and cohesion

Answer:

C: They become more dense near the Sun's surface.

Explanation:

I got it correct on EDG

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According to convection, the statement which describes how fluids change as they travel through the convection zone is  that they become more dense near the Sun's surface.

Convection works by areas of a liquid or gas heating or cooling greater than their surroundings, causing differences in temperature. These temperature differences then cause the areas to move as the hotter, less dense areas rise, and the cooler, more dense areas sink.

Often the areas of heating and cooling are fixed, and allow convective cycles or currents to become established. For example, a saucepan of water over a flame may develop convective currents as the water is heated from below, rises to the surface, and cools. Once cooled enough, the water then sinks back to the bottom of the saucepan where the cycle is repeated, and the convective overturning continues.

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Answer: 204.8256 millimeters

Explanation:

She said that the exposure to the radiation in the microwave would have cooked the animal's internal organs. She said: 'It is a horrific case in the fact that the death of the cat would have been prolonged and it is unimaginable what it would have gone through taking some time to die.

The branched alkene has a side group attached to one of the carbon atoms in the chain, resulting in a non-linear structure. The unbranched alkene, on the other hand, has a linear chain with no side groups.

Unbranched Alkene: Butene

Butene is an example of an unbranched alkene with four carbon atoms. Its chemical formula is C₄H₈. The carbon atoms are connected in a linear chain with double bonds between the adjacent carbon atoms.

Here is the structure of unbranched butene:

    H H   H

    | |   |

H - C = C - C - H

    |     |

    H     H

In this structure, each carbon atom is bonded to two hydrogen atoms and one other carbon atom through single bonds. The double bond is represented by a line between the carbon atoms.

Branched Alkene: 2-Methylpropene

2-Methylpropene is an example of a branched alkene with four carbon atoms. It contains a methyl (CH₃) group attached to the second carbon atom of the chain.

Here is the structure of branched 2-methylpropene:

      H   H   H

      |   |   |

  H - C - C = C - H

      |     |

      C     H

      |

      H

In this structure, the methyl (CH₃) group is attached to the second carbon atom of the chain. The double bond is present between the second and third carbon atoms.

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We can see that an atom with 14 protons, 14 neutrons, and 16 electrons is unstable, and has a -2 charge.

So the correct option is the third one.

An atom with 14 protons, 14 neutrons, and 16 electrons is not stable. The number of protons in an atom, also known as its atomic number, determines its element and its chemical properties. In this case, the atom has 14 protons, which corresponds to the element silicon (Si) on the periodic table.

For an atom to be stable, it should have a balanced number of protons and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or electron shells. The number of electrons in a stable atom should be equal to the number of protons, resulting in a neutral charge overall.

In this case, the atom has 14 protons and 16 electrons, which means it has two more electrons than protons, resulting in a net charge of -2. This is an example of an ion.

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Answer:

Net Charge = -2

Explanation:

If we subtract 18 from 20 we get 2. Since protons are positive and electrons are negative, and then it's obvious that electrons are greater in number, therefore the net charge would also be negative which is -2.

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The elements that is a gas at 25 degrees Celsius are given below.

What do you mean by Gas?

Gas is a state of matter in which a substance exists as a collection of molecules in constant random motion, dispersed throughout a given volume. Gases differ from solids and liquids in that they have neither a definite shape nor a definite volume. Examples of gases include air, oxygen, nitrogen, carbon dioxide, and methane.

- Hydrogen

- Helium

- Oxygen

- Nitrogen

- Neon

- Fluorine

- Chlorine

- Argon

At 25 degrees Celsius, all of these elements exist as gases under standard atmospheric pressure.

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There will be 0.4589 mL of ethyl acetate left in the space after evaporation.

The conversion of a liquid substance into a gas is known as evaporation. As a result of the liquid absorbing energy from its surroundings, molecules begin to travel faster and faster until they finally become a vapour and escape into the environment. Usually, the energy is absorbed as heat, but it can also be in the form of light or electricity.

No, the ethyl acetate won't all evaporate. The amount of ethyl acetate that will stay in the space after evaporation can be determined using the ideal gas law. As per the ideal gas law, PV = nRT

P is the overall system pressure, V is the room's volume, n is the amount of ethyl acetate in moles, R is the ideal gas constant, and T is the temperature.

To solve for n, the quantity of moles of ethyl acetate, we can rearrange the equation as follows: n = PV/RT

When the values are plugged in, we get:

n = (94.9 torr)(7.25 m x 2.75 m x 2.75 m)/(8.314 J/K mol)(298 K)

\(n = 4.666 \times 10^{-3} mol\)

The molar mass of ethyl acetate (88.11 g/mol) can then be used to compute the mass of ethyl acetate:

Mass = \(n \times M = (4.666 x 10^{-3} mol)(88.11 g/mol)\) = 0.4125 g

Using the density of ethyl acetate (0.901 g/mL), it is possible to determine the volume of the liquid that is still present:

Volume = mass/density = (0.4125 g)/(0.901 g/mL) = 0.4589 mL

As a result, there will be 0.4589 mL of ethyl acetate left in the space after evaporation.

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Answer:

Explanation: An isolated system is a system in which matter and energy both can not transfer through its boundry

The half equation for this reaction is 2H2 + O2 = 2H2O and this is reduction because it is taking place in cathode.

Does cathode or anode decrease occur?

Although the direction of spontaneous electron flow in galvanic cells may be reversed in electrolytic cells, the definitions of cathode and anode where reduction takes place at the cathode and oxidation happens at the anode remain the same.

Which ions undergo cathodic reduction?

The positively charged ions will migrate toward the cathode after becoming reduced by receiving electrons. Since positive ions pick up electrons at the negative cathode, reduction takes place there.

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Answer:

5.01 moles

Explanation:

Calculate the number of moles in 400g of Tio2

first, write the formulas correctly

Calculate the number of moles in 400g of TiO2

capitalize the first letter of your elements

the molar mass of TiO2 is

47.88 +2X16.00 =47.88  +32.00 = 79.88 gm/mole

(to 3 sig fig = 79.9 gm/mole

400 gm/79.9 gm/mole = 400/79.9 mole gm/gm =

400/79.9 moles = 5.01 moles