Can methanol be a gas

The charge of the gold ion in AuS₂ is +4.

The charge of the gold in AuS₂ can be determined by balancing the charges of the individual components. In this case, the sulfide (S) ion has a charge of -2, and there are two sulfide ions in AuS₂, so the total charge from the sulfide ions is -4. To balance this charge, the gold ion must have a charge of +4.

Therefore, the charge of the gold ion in AuS₂ is +4. This information can be used to write the balanced chemical equation for the formation of AuS₂, which would be represented as:

Au⁺⁴ + 2S⁻² → AuS₂

This equation shows that two sulfide ions with a charge of -2 are combining with a single gold ion with a charge of +4 to form the compound AuS₂.

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The element that CANNOT be extracted directly from air is chlorine. This is the answer to the given question.

Air is a mixture of gases that are essential to sustain life. It is made up of nitrogen, oxygen, argon, carbon dioxide, neon, helium, and many other elements. There are several methods that are used to extract elements from the air.

However, not all elements can be extracted directly from air. This is because some elements are more reactive than others and they cannot be separated by simple techniques. For example, chlorine is a reactive element and cannot be extracted directly from air. It has to be prepared by chemical methods.

Chlorine is a chemical element that has the symbol Cl and the atomic number 17. It is a halogen and is located in group 17 of the periodic table. It is a yellow-green gas that is highly reactive and is used in the production of various chemicals.

Chlorine is also used to purify water and to sanitize swimming pools and other water bodies. It has a pungent odor and can be toxic if inhaled in large quantities. Chlorine is extracted from brine by the electrolysis of sodium chloride.

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The balanced chemical equation for the reaction between hydrazine and oxygen shows that one mole of N2H4 reacts with one mole of O2 to produce one mole of N2 and two moles of H2O.

\(N2H4(l) + O2(g) → N2(g) + 2H2O(g)\).

Therefore, if 6 moles of hydrazine react with an excess of oxygen, we can determine the amount of water produced as follows: 6 moles

\(N2H4 x (2 moles H2O / 1 mole N2H4) = 12 moles H2O\).

Therefore, the answer is 12 moles of water will be produced when 6 moles of hydrazine reacts with an excess of oxygen.

\(N2H4(l) + O2(g) → N2(g) + 2H2O(g)\)

From the equation, we see that for every 1 mole of hydrazine that reacts, 2 moles of water are produced. Therefore, if 6 moles of hydrazine react, we can expect the production of:  \(2 x 6 = 12\) moles of water  Therefore, the answer is option (d) 12.0 mol H2O.

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The theoretical yield of Fe₂O₃ is 0.0059 moles and the percent Yield is 44.2%

Using stoichiometry to calculate the theoretical yield of Fe₂O₃:

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, set up the following proportion:

3.4 g O₂ / 32 g/mol O₂ = x mol Fe₂O₃ / (2 mol Fe / 4 mol O₂ x 55.85 g/mol Fe)

Solving for x:

x = 3.4/32 x 4/3 x 1/55.85 x 2 = 0.0059 moles Fe₂O₃

Therefore, the theoretical yield of Fe₂O₃ is 0.0059 moles.

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, for every 4 moles of Fe that react, expect to produce 2 moles of Fe₂O₃.

Using this information, set up the following proportion:

4 mol Fe / 55.85 g/mol Fe = 0.0059 mol Fe₂O₃ / x

Solving for x:

x = 55.85 x 0.0059 / 4 = 0.082 g Fe

Therefore, the theoretical yield of Fe is 0.082 g.

To calculate the percent yield, use the following formula:

Percent Yield = (Actual Yield / Theoretical Yield) x 100%

Substituting the values calculated:

Percent Yield = (0.0059 mol Fe₂O₃ / 0.082 g Fe) x 100% x (1.5 moles H₂O / 2 moles Fe₂O₃)

Percent Yield = 44.2%

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The number that represents the gas phase is V.

The graph shown is the heating curve of a substance X.

The substance is heated from the solid phase (I) until it undergoes fusion (II).

III represents the liquid state of substance X while IV represents the vapourization process of X.

At point V substance X has been converted to the gas phase.

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Answer:

Magnesium, calcium and sodium.

Explanation:

Magnesium, calcium, sodium, and other beneficial minerals are the substances present in drinking water. Different regions have different fluoride concentration in their water such as in sea water, fluoride level is 1.1 mg/L while in surface water, the concentration is 0.01–0.3 ppm. Yes, fluoride is soluble in water. No, fluoride should not be added to drinking water because it harm for health. All the questions can be answered by science because it is related to chemistry.

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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To find the break-even point, we need to determine the number of units at which the total cost equals the total revenue. In this case, variable costs of $81, the break-even point is at approximately 459 units.

The break-even point is the point at which the total cost equals the total revenue, resulting in zero profit or loss. To calculate the break-even point, we need to consider the fixed costs, variable costs, and revenues.

In this scenario, the fixed costs are given as $790, the revenues are $1.75 per unit for 180 units sold, and the variable costs are $81. The formula for calculating the break-even point is:

Break-even point = Fixed costs / (Selling price per unit - Variable cost per unit)

Substituting the given values, we have:

Break-even point = $790 / ($1.75 - $81/180)

Simplifying the equation, we find:

Break-even point ≈ 459 units

Therefore, the break-even point is approximately 459 units, meaning that the company needs to sell at least 459 units to cover its costs and avoid a loss.

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James chadwick discovered this particle neutron also neutrino called as is last of the subatomic particles to be characterized.

In 1932 james chadwick announced that the core also contained a new uncharged particle, which he called the neutron. neutron is also called neutrino he proved the existence of neutrons elementary particles devoid of any electrical charge. james chadwick was an English physicist who was awarded the 1935 Nobel prize in physics for his discovery of the neutron in 1932.

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Answer:

0 K

\({ - \bf{273 \degree C}}\)

298 K

\({ \tt{ = 298 - 273}} \\ = { \bf{25 \degree C }}\)

323 K

\({ \tt{ = 323 - 273}} \\ = { \bf{50 \degree C}}\)

423 K

\({ \tt{ = 423 - 273}} \\ = { \bf{150 \degree C}}\)

1.T=[£+273]

=273

It is because kelvin temperature is absolute zero.

Answer:

(A)

Explanation:

It decreases cuz when they start climbing a mountain there air pressure is getting low and so is their blood. The higher they go the more it decreases. Hope this helps:)!

chemical that appears as a colorless liquid, is used in a wide range of cleaning and personal care products, including hair dyes and bleaches, toothpaste and mouthwashes, bathroom cleaners and laundry stain removers. Hydrogen peroxide can also be found in over-the-counter first aid antiseptics, and it is used as a bleaching agent in some food products. It has other consumer and industrial uses as well, including water treatment.

Share:

Answer:

A

Explanation:

Answer:

waning gibbous I belive

Explanation:

Answer:

third quarter moon

Explanation:

The trial that would most likely be the most rapid is option b: 1 gram of chunk calcium reacts with 20 ml of 0.5 M acid.

This is because the reaction rate depends on the concentration of reactants. In this case, the concentration of the acid is the highest in option b compared to the other options. The acid concentration is 0.5 M, which is higher than the acid concentrations in options c and d (1.5 M). Option a has a higher acid concentration (5.0 M), but it uses powdered calcium instead of chunk calcium.

Chunk calcium has a smaller surface area compared to powdered calcium. When calcium reacts with acid, the reaction occurs on the surface of the calcium particles. With chunk calcium, there is a smaller surface area exposed to the acid, resulting in a slower reaction rate. On the other hand, powdered calcium has a larger surface area due to its fine particles, allowing for more contact between the calcium and acid molecules, leading to a faster reaction rate.

Therefore, in option b, the combination of a higher acid concentration and the use of chunk calcium (which provides a smaller surface area) results in a more rapid reaction compared to the other options. The higher acid concentration provides a greater number of acid molecules available to react with the calcium, while the chunk calcium restricts the available surface area for the reaction, balancing the reaction rate to a more optimal level. Therefore, Option B is correct.

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An exothermic process is one that gives off heat.

Explanation:

This heat is transferred to the surroundings. An endothermic process is one in which heat has to be supplied to the system from the surroundings.

The question requires us to calculate the amount of vapor water produced as a by-product when 66g of carbon dioxide are obtained from the combustion of propane.

Considering the combustion of propane (C3H8), we have the following reaction:

IFrom the reaction, we can see that the stoichiometric relationship between C3H8 and water (H2O) is as follows:

2 mol C3H8 ---------- 8 mol H2O

Then, to calculate the amount of water produced as a by-product, we'll need to determine the amount of reactant needed to produce 66g of CO2.

Since the molar mass of CO2 is 44g/mol and considering the reaction written above, we can write:

2 mol C3H8 ---------- 4 mol CO2

x ---------- (66g/44g) = 1.5 mol CO2

Solving for x, we have that 0.75 mol of C3H8 are required to produce 66g of CO2.

Now, we calculate the amount of water that should be obtained from 0.75 mol of C3H8:

2 mol C3H8 ---------- 8 mol H2O

0.75 mol C3H8 ----- y

Solving for y, we have that 3 moles of water will be obtained as a by-product.

At last, we convert the calculated amount of vapor water into its volume considering the Standard Temperature and Pressure conditions (STP), where 1 mol of a gas corresponds to 22.4 L of the same gas:

1 mol vapor H2O ---------- 22.4 L vapor H2O

3 mol vapor H2O --------- z

Solving for z, we have that 67.2 L of vapor water will be obtained as a by-product when 66g of CO2 are produced from the combustion of propane.

With the production of Jacopo Peri's mostly forgotten Dafne in Florence in 1598, opera began in Italy at the end of the 16th century.

Particularly from Claudio Monteverdi's L'Orfeo and quickly spread throughout Europe: Jean-Baptiste Lully in France, Henry Purcell in England, and Heinrich Schütz in Germany

The first nation where opera gained popularity was Italy. Claudio Monteverdi and Jacopo Peri called it home. This exciting form of entertainment eventually spread throughout the remainder of Europe. Italy, France, and Germany are the primary producers of opera.

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The partial pressure of N2 is 0.135 atm. Using the given balanced chemical equation, we can use the stoichiometric coefficients to determine the molar ratios between the reactants and products.

From the equation, we see that 2 moles of N2H4 react to form 3 moles of N2. Therefore, the moles of N2 produced can be calculated as:

moles of N2 = (2/3) * moles of N2H4

We are given the partial pressures of N2H4, N2, and H2 as PN2H4 = 0.2 atm, PN2 = 3.5 atm, and PH2 = 4.4 atm. Using the ideal gas law, we can calculate the moles of each gas present:

moles of N2H4 = PN2H4 * V / (RT)
moles of N2 = PN2 * V / (RT)
moles of H2 = PH2 * V / (RT)

where V is the volume of the gas mixture, R is the ideal gas constant, and T is the temperature in Kelvin.

Assuming the volume and temperature are constant, we can substitute these values into the equations and solve for the moles of each gas:

moles of N2H4 = (0.2 atm) * V / (0.08206 L·atm/mol·K * 298 K) = 0.008117 mol
moles of N2 = (3.5 atm) * V / (0.08206 L·atm/mol·K * 298 K) = 0.143 mol
moles of H2 = (4.4 atm) * V / (0.08206 L·atm/mol·K * 298 K) = 0.176 mol

Using the stoichiometric ratio from the balanced equation, we can calculate the moles of N2 produced:

moles of N2 = (2/3) * moles of N2H4 = (2/3) * 0.008117 mol = 0.005411 mol

Finally, we can use the ideal gas law again to calculate the partial pressure of N2:

PN2 = moles of N2 * (RT) / V = (0.005411 mol) * (0.08206 L·atm/mol·K * 298 K) / V = 0.135 atm

Therefore, the partial pressure of N2 is 0.135 atm, rounded to four significant figures.

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Answer:

false

Explanation:

because  i know it

The kinetic molecular theory does not suggest that "gas particles will be attracted to one another. Hence, the correct option is (a).

The kinetic molecular theory is a set of assumptions about the behavior of gases based on the motion of their constituent particles.

1. The gas particles are in constant, random motion and are in collisions with each other and the walls of the container.

2. The volume occupied by the gas particles is negligible compared to the volume of the container.

3. The collisions between gas particles and the walls of the container result in a measurable pressure.

4. The average kinetic energy of the gas particles is proportional to the temperature of the system.

The first three assumptions are considered to be part of the basic kinetic molecular theory, while the fourth assumption is sometimes referred to as the equipartition theorem.

Therefore, the statement "gas particles will be attracted to one another" is not part of the kinetic molecular theory and is incorrect. The interactions between gas particles are not considered in this theory, which assumes that they do not interact with each other except during brief, elastic collisions.

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The bond formed between two nonmetals, which are usually very similar in their tendency to lose or gain electrons, is the covalent bond. This bond involves the sharing of one or more electron pairs between the two atoms.

What is covalent bond?

A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed.

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(A) CH2 = CH2 + H2 ------------> CH3---CH3

(B) CH2 = CH2 polymerization 2CH2 = CH2

(D) CH2 = CH2 + H2O -----> CH3CH2OH

(E) CH2 = CH2 + 6O ------> 2CO2 + 2H2O

(F) CH2 = CH2 + H2 ------------> CH3---CH3

(G) CH2 = CH2 + Cl2 --------> C2H4Cl2

(H) CH2 = CH2 + HCl -----> CH3CH2Cl

When a monomer or a monomer's molecules react, polymer chains are created. Different approaches exist to categorise the numerous types of polymerization processes.

The two main categories of polymerization reactions are condensation polymerization and addition polymerization. Along with polymerization, the monomers add to one another in a way that results in a polymer that has every atom from the beginning monomers. The molecules of ethylene are linked together in lengthy chains.

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Answer: Referring to a solution that does not completely disassociate, the conductivity would be low.

Explanation: Ions that are completely disassociated conduct better than ions that still are connected by bonds.

The kind of conductivity that would you expect insoluble compounds have is very poor or low. Due to this, these compounds do not dissociate to any appreciable extent.

Conductivity is measured through the utilization of salinity measurement. This measurement most frequently determines the parts per thousand or grams per liter.

A Siemen is also referred to as its smaller equivalents, the milli-Siemen, and the micro-Siemen, which are each one-millionth of a Siemen, is a unit used to determine the conductivity of any given solution.

Some solutions like NaCl, HCl, NaOH, etc have high electrical conductivity because they readily dissociate into their ions. While insoluble compounds do not have this capability to dissociation, so they generally have low or poor electrical conductivity.

Therefore, insoluble compounds generally have low or poor electrical conductivity.

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The metal with the highest melting point among the options provided is tungsten (b).

Hope it helps :)

Answer:

b. Tungsten

Explanation:

The element with the highest melting point is tungsten (symbol: W), also known as wolfram. Tungsten has the highest melting point of any metal and the second-highest melting point of any element after carbon. Its melting point is 3422 °C (6192 °F). Tungsten is a transition metal and is known for its high density, hardness, and resistance to heat and corrosion. It is used in a variety of applications, including light bulb filaments, electrical contacts, and X-ray tubes. Thallium, cobalt, and osmium are not known for their high melting points.

Answer:

Explanation:

Entropy is measure of disorder so as we lower the temperature of gas , its entropy decreases .

Hence at - 200°C entropy of nitrogen will be less than that at - 190°C .

At freezing point ,

entropy of fusion  = latent heat / freezing temperature

= .71 kJ / ( 273 - 210 )

= 710 / 63 J mol⁻¹ K⁻¹ .

= 11.27 J mol⁻¹ K⁻¹ .

entropy of fusion = 11.27 J mol⁻¹ K⁻¹ .