Is pewter OK in water?

The correct answer is Carbon Monoxide (CO). When organic matter is burned with insufficient oxygen, it leads to incomplete combustion and the production of various gases, including carbon monoxide. Carbon monoxide is a colorless, odorless gas that is extremely poisonous and can be fatal in high concentrations.Carbon dioxide (CO2) is a product of complete combustion and is not produced when there is insufficient oxygen.Benzene is a hydrocarbon compound composed of six carbon atoms and six hydrogen atoms, and it is not produced from combustion.Methane (CH4) is a hydrocarbon compound composed of one carbon atom and four hydrogen atoms, and it is not produced from combustion.Mercury is a metallic element and is not related to combustion.

Answer:

sjdjdn. ekdkdnd. ksossksn. sodkd

Answer:

The best way to learn any answer is to read it and then write it down in a paper. Finish your chapters and if you find problem in memorizing them, just jot them down! Jotting down answers will not only help you in memorizing answers for the exam, but will also boost long term memories

We know, molecular mass of sucrose is 342 g/mol.

So, number of moles in 18 g is :

\(n_1 = \dfrac{342\ g/mol}{18\ g}\\\\n_1 = 0.053 \ moles\)

Also, number of moles of water is :

\(n_2 = \dfrac{180}{18} \\\\n_2 = 10 \ moles\)

We know, 1 mole of sucrose contain 11 moles of oxygen.

So,

\(n' = 0.053\times 11\\\\n'= 0.583\ moles\)

1 mole of water contain 1 mole of oxygen .

So, moles of oxygen in water are :

\(n'' = 10\ moles\)

Total number of moles, \(n' + n'' = 10.583 \ moles\) .

Number of oxygen atoms are :

\(N = 6.022 \times 10^{23}\times 10.583\\\\N = 6.37 \times 10^{24}\)

Hence, this is the required solution.

Mg₂₅F₅₂ would never be a chemical formula because it violates the principles of chemical nomenclature, which requires that chemical formulas be written in the simplest, most reduced form possible.

This means that subscripts must be reduced to their lowest whole number ratio, which is achieved by dividing all subscripts by their greatest common factor.

In the case of Mg₂₅F₅₂, both subscripts are divisible by 2, resulting in the simpler and more reduced formula of Mg₁₂.₅F₂₆. Similarly, if there were any other common factors between the subscripts, they would also need to be reduced to the lowest possible whole number ratio.

Additionally, it is unlikely that a compound with such a large formula unit would exist, as it would have an extremely high molecular weight and be difficult to synthesize and study experimentally.

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Citric acid is added to food to add tartness and enhance the flavor. The correct option is b.

Citric acid, a natural compound found in citrus fruits, is commonly added to food for its tart flavor and ability to enhance taste. Here's a step-by-step explanation:

1. Tartness: Citric acid is highly acidic and has a sour taste. When added to food, it provides a sharp, tangy flavor that adds tartness. This tartness can help balance the overall taste profile of a dish, especially in sweet or savory recipes.

2. Flavor enhancement: Citric acid acts as a flavor enhancer, intensifying the existing flavors in food. It has the ability to enhance the perception of other taste sensations, such as sweetness and saltiness, making food taste more vibrant and flavorful.

3. Preservation: Citric acid also acts as a natural preservative in some food products. It has antimicrobial properties that inhibit the growth of certain bacteria and fungi, helping to extend the shelf life of foods and prevent spoilage.

4. pH adjustment: Citric acid can be used to adjust the pH level of certain food products. It is commonly used in canning and preserving processes to create an acidic environment that inhibits bacterial growth and helps maintain product quality and safety.

Overall, the addition of citric acid to food primarily serves to enhance flavor, provide tartness, and potentially contribute to preservation. Option b is the correct one.

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Answer:

Here is a completed photo. Pressure was on it twice

The charge qₑₙ contained within the Gaussian cylinder is equal to the net charge enclosed by the cylinder.

In the context of Gauss's Law in electromagnetism, a Gaussian cylinder is an imaginary surface used to apply the law. Gauss's Law states that the electric flux through a closed surface is proportional to the net charge enclosed by that surface.

The charge qₑₙ enclosed within the Gaussian cylinder can be determined by calculating the integral of the electric field over the surface of the cylinder. This integral represents the electric flux passing through the surface, which is proportional to the net charge enclosed.

To find the value of qₑₙ, you need to evaluate the integral of the electric field over the surface of the Gaussian cylinder. The result will be the net charge enclosed by the cylinder.

By using Gauss's Law and properly considering the symmetry and characteristics of the electric field, you can determine the charge qₑₙ enclosed within the Gaussian cylinder for a given distribution of charges.

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The conversion attained in the given system of two Continuous Stirred-Tank Reactors (CSTRs) in series is approximately 0.8889, which is closest to option B: 0.89.

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X = 1 - 1 / (1 + Dₐ)ⁿ

where X is the conversion,

Dₐ is the Damköhler number, and

n is the number of CSTRs in series.

The Damköhler number (Dₐ) is defined as the ratio of the reaction rate to the flow rate:

Dₐ = k * V / Q

where k is the reaction rate constant,

V is the volume of each CSTR, and

Q is the flow rate.

Given:

k = 0.3 min⁻¹ (reaction rate constant)

V = 750 gal (volume of each CSTR)

Q = 15 ft³/min (flow rate)

Converting units:

1 gal ≈ 0.1337 ft³

750 gal ≈ 100.275 ft³

Now, let's calculate the Damköhler number (Dₐ) for each CSTR:

Da1 = k * V / Q

      = (0.3 min⁻¹) * (100.275 ft³) / (15 ft³/min)

      ≈ 2

Since there are two CSTRs in series, we need to calculate the Dₐ value for the second CSTR:

Da₂ = Da₁ = 2

Now, let's substitute the values into the conversion equation:

X = 1 - 1 / (1 + Dₐ)ⁿ

   = 1 - 1 / (1 + 2)²

   = 1 - 1 / 9

   ≈ 0.8889

Therefore, the conversion attained in the system of two CSTRs in series is approximately 0.8889, which is closest to option B: 0.89.

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Answer:

30

Explanation:

v=m÷D

v=25÷5

volume=5

total volume=25+5

=30

The atmosphere is similarly unevenly heated by the surface of the earth.

Correct the false statements to make them true.

1. It's true that the Sun provides the energy that drives weather

2. Yes the winds occur as a result of convection in the atmosphere

3. Both the atmosphere and oceans experience convection as false

4. The given Statement is false, the earth's surface has no effect on the      temperature of the air

5. Winds can occur due to unequal heating within the atmosphere is true

6. There is no relationship between ocean currents and global w, the statement given is false as there is a relationship between ocean currents and global w.

7. Global winds produce waves and tides in the ocean is true

What is meant by Earth's Surface?

Earth's surface is heated by sunlight as it moves through the atmosphere and absorbs it. After that, that energy is returned to the atmosphere. The atmosphere's greenhouse gases, such as carbon dioxide and methane, absorb this energy and prevent it from traveling into space like a blanket.

The atmosphere is similarly unevenly heated by the surface of the earth. The air close to the equator is more heated than air close to the poles. Heat expands air. As a result, cold air at the poles is denser than warm air at the equator.Numerous Earth system processes and phenomena are influenced by air and water temperatures, including Patterns of the ocean and atmospheric circulation that influence how heat is distributed globally.

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Answer:

B- Have new properties after they are mixed

I hope this helps

The highest energy subshell occupied by a Titanium ion with +2 charge (Ti⁺²) will be 4s.

The element Titanium has an Atomic Number of 22. This means that Titanium has 22 electrons bound by the nucleus, which are assigned to various orbitals. The order of the filling of the orbitals, which is the same for all elements, goes as follows for Titanium.

Ti₂₂ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

As per the order, the orbitals are written in the order of increasing energy, which can be checked by the (n + l) rule.

In the question, Ti⁺² ion is mentioned, where two electrons have been removed. Since the electrons are always removed from the outermost orbital, the electronic configuration of the ion will be:

Ti⁺² = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁰

As seen, the electrons are removed from the outermost orbital. Thus, after removal, the highest energy orbital would be 4s.

(Image depicting Electronic Configuration for reference)

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There is 1.0 mole of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution.

To determine the number of moles of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution, we need to use the equation:

moles = concentration (M) × volume (L)

Since 1 liter is equal to 1000 milliliters, we divide 500.0 mL by 1000 to get 0.5 L.

Next, we substitute the values into the equation:

moles = 2.0 M × 0.5 L

The concentration of 2.0 M indicates that there are 2.0 moles of KNO₃ in 1 liter of the solution. Therefore, multiplying the concentration (2.0 M) by the volume (0.5 L) gives us the number of moles of KNO₃:

moles = 2.0 M × 0.5 L = 1.0 mol

Hence, there is 1.0 mole of KNO3 in 500.0 mL of a 2.0 M KNO₃ solution.

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According to the information provided, the voltage across the lamp L1 is 3.2V. In order to determine the voltage across lamp L2 and the voltage across the battery, we will need to make a few assumptions.

Assuming that both lamps are identical and that they are connected in series with each other, the total voltage drop across both lamps will be equal to the voltage of the battery. In other words,
Voltage across L1 + Voltage across L2 = Voltage of the battery
Since we know the voltage across L1 is 3.2V, we can rearrange the above equation to solve for the voltage across L2:
Voltage across L2 = Voltage of the battery - Voltage across L1
Without knowing the voltage of the battery, we cannot determine the exact value of the voltage across L2. However, we can make another assumption that the battery is a standard 9V battery commonly used in electronic devices.

Therefore, Voltage across L2 = 9V - 3.2V = 5.8V
To answer the second question, we can simply say that the voltage across the battery is 9V (assuming it is a standard 9V battery as mentioned above).
In summary, the voltage across lamp L2 is 5.8V and the voltage across the battery is 9V.

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Answer:

The Answer is 112.118

Explanation:

Answer:

62.582 cm

Explanation:

divide 55.040mm by 10 because there is 10mm in 1 cm.

you will get 5.504 then just add 23.033 and 34.045

- the least amount of sig figs after the decimal is 3 so it stays as 62.582 cm.

The total number of moles contained in 115 grams of C₂H5OH is 2.50 moles .

The term "mole" refers to the quantity of a substance that has the same amount of subatomic particles (ions, molecules, or atoms) as there are carbon atoms.

Atomic weight of carbon(C)= 12 gm

Atomic weight of Hydrogen (H)=1 gm

Atomic weight of oxygen (o)=16 gm

∴Molecula weight of C2H5OH =(12×2 + 1×6 + 16×1) gm

24 + 6 + 16 gm = 46 gm

∴ 46 gm of C2H5OH contains 1 mole

1 gm of C2H5OH contain = 1/46 moles

115 gm of C2H5OH contains = 115×1/46 moles

⇒2.5 moles

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The first one appear to be a pan with some liquid heating up.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The second one seems to be a ice cube melting.

Its beginning phase is solid, the phase change type is fusion, and its ending state is liquid.

The third one is water, or other liquid, making clouds.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The fourth illustration seems to be an aluminium can. There aren't really a phase change happening, but when we open the aluminium can containing gaseous drink, there are molecules of gas diluted into the liquid and some of it encouter each other to make a bubble of the gas and is released. It is not an actually phase change, it is the reverse process of diluting gas into liquid. Initially it is diluted gas, it gets released and in the end it is in gas phase.

Given Figure 2 below shows a set of contour lines for temperature, and the question wants you to complete a simple analysis of temperature. The analysis should be made for the 75 and 70°F isotherms. The 80°F contour is also to be analyzed.

Figure 2 From the image above, we can identify the following contour lines and their values:Contour line C1 is for a temperature of 60°F.Contour line C2 is for a temperature of 65°F.Contour line C3 is for a temperature of 70°F.Contour line C4 is for a temperature of 75°F.Contour line C5 is for a temperature of 80°F.Using the given information, we can then proceed to answer the questions as follows:Analysis for the 75°F isotherm Contour line C4 shows a temperature of 75°F. This means that any point lying on this contour line has a temperature value of 75°F. Therefore, we can conclude that the following regions have a temperature of 75°F:Region A: This region is enclosed by contour lines C3 and C4.

Thus, it has a temperature of 75°F.Region B: This region is enclosed by contour lines C4 and C5. Thus, it has a temperature of 75°F.Analysis for the 70°F isotherm Contour line C3 shows a temperature of 70°F. This means that any point lying on this contour line has a temperature value of 70°F. Therefore, we can conclude that the following regions have a temperature of 70°F:Region C: This region is enclosed by contour lines C2 and C3. Thus, it has a temperature of 70°F.Region D: This region is enclosed by contour lines C3 and C4. Thus, it has a temperature of 70°F.Analysis for the 80°F contourContour line C5 shows a temperature of 80°F. This means that any point lying on this contour line has a temperature value of 80°F. Therefore, we can conclude that the following regions have a temperature of 80°F:Region E: This region is enclosed by contour lines C4 and C5. Thus, it has a temperature of 80°F.

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Answer:

Period 2

Explanation:

From the picture provided, I am guessing this is Fluorine. Normal Fluorine has 9 protons, electrons, and atomic number. Thus, it can be found in the second period.

***Period # = # of electron shells

The oxidation number of Na in the compound Na2CO3 is +1.

To determine the oxidation number of Na in Na2CO3, we need to consider the known oxidation numbers of other elements and the overall charge of the compound.

1. The compound Na2CO3 contains two Na atoms and one C atom, along with three O atoms.

2. Oxygen (O) typically has an oxidation number of -2, unless it is in a peroxide where it is -1.

3. Carbon (C) is more electronegative than hydrogen (H) but less electronegative than oxygen (O), so it usually has an oxidation number of +4 in compounds.

4. The compound Na2CO3 has a neutral charge, which means the sum of the oxidation numbers of all the elements must be zero.

5. Let's assign the oxidation number of Na as x. Since there are two Na atoms, the total oxidation number contribution from Na is 2x.

6. The oxidation number of C in CO3 is +4, and the oxidation number of O is -2. Since there are three O atoms in CO3, the total oxidation number contribution from O is 3*(-2) = -6.

7. Setting up the equation: 2x + 4 + (-6) = 0.

8. Solving the equation: 2x - 2 = 0, 2x = 2, x = 1.

Therefore, the oxidation number of Na in Na2CO3 is +1.

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Answer:

Combustion reactions must have oxygen as a reactant. Note that the water that is produced is in the gas rather than the liquid state because of the high temperatures that accompany a combustion reaction.

Explanation:

NOT MY WORK! HOPE THIS HELP!

Answer:

Explanation:So if a neutron or two is added or removed from the nucleus, then the ... For example Cl–35 has an atomic mass of 35 u (17 protons and 18 neutrons), while Cl–37 ... Calculate the mass contribution of chlorine–35 to the average relative atomic mass ... Which of the following are isotopes of 3517Cl? 1735Cl. 3517Cl. 3717Cl.

The overall reaction order would be approximately equal to the individual order of H₂, which is most likely 1 or 2.

When all of the concentration of H₂ is very large, the overall reaction order can be determined by adding up the individual orders of the reactants. The order of a reaction refers to the power to which the concentration of a reactant is raised in the rate equation. For example, if the rate equation is rate = k[H₂][O₂]², the overall reaction order would be 3 (sum of the individual orders of H₂ and O₂).

In this scenario, if the concentration of H₂ is very large, it means that its concentration greatly exceeds that of the other reactant(s) in the rate equation. Therefore, the overall reaction order would be approximately equal to the individual order of H₂, which is most likely 1 or 2, depending on the specific reaction.

It's important to note that the overall reaction order can only be determined experimentally through rate measurements, as it cannot be predicted solely based on the stoichiometry of the reaction.

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if the speed of every gas molecule in the sample is doubled, the new temperature of the gas is 800 K.

A sample of gas has a temperature of 200 K. The relationship between the kinetic energy of gas molecules and temperature is given by the equation

KE=1/2 mv2=3/2 kBT.

The temperature of a gas sample is directly proportional to the kinetic energy of the gas molecules.

In the formula, KE=1/2 mv², the kinetic energy (KE) of a molecule of a gas of mass m moving with velocity v is given. v is the magnitude of the velocity of the particle.

In this formula, k = Boltzmann's constant and T = temperature. KE = 1/2 mv² = 3/2 kBT.

Rearrange the equation to find temperature T. T = (2/3) (KE/kB)

If we know the kinetic energy of the gas, we can use the above equation to determine the temperature of the gas. If the speed of every gas molecule in the sample is doubled, it implies that the kinetic energy of the sample is doubled also.

Thus, the new temperature (Tnew) is four times the initial temperature (Told).

Hence, if the speed of every gas molecule in the sample is doubled, the new temperature of the gas is 800 K.

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Answer:

sorry

Explanation:.

Answer:

84%

Explanation: