What is the second quantum number of a 1s^2 electron in phosphorus,
1s22s22p63523p3?
O A. ) = 3
B. /= 0
O C. 1 = 1
D. /= 2

The amount of aluminum that reacted is approximately 0.069 grams.

To determine the mass of aluminum that reacted, we need to use the ideal gas law and consider the partial pressure of hydrogen gas. First, we calculate the pressure of hydrogen gas by subtracting the partial pressure of water vapor from the total pressure. The pressure of hydrogen gas is 751 mmHg - 26.8 mmHg = 724.2 mmHg.

Next, we convert the pressure of hydrogen gas from mmHg to atm by dividing by 760 mmHg/atm, giving us 0.953 atm.

Using the ideal gas law equation PV = nRT, we can calculate the number of moles of hydrogen gas. The volume of hydrogen gas is given as 37.3 mL, which we convert to liters by dividing by 1000 mL/L, giving us 0.0373 L. The temperature is given as 27°C, which we convert to Kelvin by adding 273.15, giving us 300.15 K. The ideal gas constant R is 0.0821 L∙atm/(mol∙K).

Plugging the values into the ideal gas law equation, we can solve for the number of moles of hydrogen gas: (0.953 atm) * (0.0373 L) = n * (0.0821 L∙atm/(mol∙K)) * (300.15 K).

Simplifying the equation, we find that the number of moles of hydrogen gas is approximately 0.00139 moles.

Since the balanced chemical equation between aluminum and hydrochloric acid is 2Al + 6HCl → 2AlCl₃ + 3H₂, we can conclude that 2 moles of aluminum react to produce 3 moles of hydrogen gas.

Using this ratio, we can calculate the number of moles of aluminum that reacted: (0.00139 mol H₂) * (2 mol Al / 3 mol H₂) = 0.000926 moles Al.

Finally, we can convert moles of aluminum to grams using the molar mass of aluminum (26.98 g/mol): (0.000926 mol Al) * (26.98 g/mol) ≈ 0.069 g Al.

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Answer: With power and energy, power is units of energy divided by time. The same difference as distance and velocity. The units of power are watts, the units of energy are joules.

Explanation:

abcdefghijklmnopqrstuvwxyzExplanation:abcdefghijklmnopqrstuvwxyz

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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The total pressure becomes 1.15 atm after the third gas is added.

To solve this problem, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
First, we need to find the total number of moles of gas in the container before the third gas is added. We can use the partial pressures of gases A and B to find their respective number of moles using the formula n = PV/RT:
nA = (0.371 atm)(8.65 L)/(0.0821 L·atm/mol·K)(49 + 273 K) = 0.00952 mol
nB = (0.769 atm)(8.65 L)/(0.0821 L·atm/mol·K)(49 + 273 K) = 0.0197 mol
The total number of moles is the sum of the number of moles of each gas:
nTotal = nA + nB = 0.00952 mol + 0.0197 mol = 0.0292 mol
Next, we can use the total number of moles and the partial pressures of gases A and B to find the total pressure before the third gas is added:
PTotal = (nTotalRT)/V = [(0.0292 mol)(0.0821 L·atm/mol·K)(49 + 273 K)]/8.65 L = 1.01 atm
Finally, we can use the total number of moles and the total volume (since there is no change in volume) to find the total pressure after the third gas is added:
PTotal = (nTotalRT)/V = [(0.0292 mol + 0.160 mol)(0.0821 L·atm/mol·K)(49 + 273 K)]/8.65 L = 1.15 atm

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Explanation and Answers:

If we compare the properties of the sample #4 with the sample #2 we will find that:

a) What two piece of evidence support her claim?:

- The color of sample #4 is silver, it is the same color as the color of aluminum.

- Sample #4 conducts the electricity, the same as aluminum.

b) What one piece of evidence refutes her claim?:

- The density of sample #4 is different from the density of aluminum.

c) Why does this evidence refute her claim?

Because the density is a property that is characteristic of each metal, if the sample #4 has a density different from aluminum it can't be aluminum.

1. Some reactions will present an actual yield lower than the theoretical yield, and this can occur due to many situations, a couple of the reasons why that we can list is that some reactions don't have the reactants actually reacting to form the products, and another reason why is the loss of reactants in the process for many possible situations.

4. According to the solubility curve, if we have 30 grams of NH4Cl at 50°C, the reaction will be unsaturated

Carbon dioxide is considered to be a greenhouse gas because it absorbs and emits infrared radiation.

Greenhouse gases like carbon dioxide trap heat in the atmosphere, leading to the warming of the Earth's surface and atmosphere.Carbon dioxide is a greenhouse gas, meaning that it can absorb and emit infrared radiation. Carbon dioxide and other greenhouse gases in the atmosphere act as a type of insulation, trapping heat and keeping the Earth's surface and atmosphere warm.A greenhouse gas is a gas that can absorb and emit infrared radiation. The greenhouse effect occurs when certain gases, such as carbon dioxide and water vapor, trap heat in the Earth's atmosphere. As more greenhouse gases are released into the atmosphere, the Earth's temperature increases, leading to climate change.

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In the above intermediate chemical equation, oxygen will appear as follows: O₂(g) as a reactant (option B).

A chemical equation in chemistry is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

According to this question, an intermediate chemical equation is presented as follows:

As observed in the above chemical equation, oxygen will react in its gaseous form i.e. as a reactant.

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size and shape. only the appearance of the paper will have changed, but is reversible.

The crystallization step of recrystallization removes the impurities present within the crystal lattice.

The washing step of recrystallization removes the impurities present on the surface of solid.

The solute crystallizes out when the solvent cools and the solution gets saturated with the solute (reforms a solid). Impurities are eliminated from the crystal lattice as the crystal grows, concluding the purification procedure. After that, the crystals can be gathered, cleaned, and dried.

Because the impurities won't crystallize quite yet and instead remain in the solution, the impure substance will crystallize in a purer form. The more pure crystals must now be separated using a filtration procedure. It is possible to repeat the process.

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The numerical value of the Ksp  of \(BaSO_{4}\) is 1.69 * 10^-20.

The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that \(BaSO_{4}\) is almost insoluble in water.

i) The Ksp of the \(BaSO_{4}\) solution can be obtained from the relation;

Ksp = [\(Ba^{2+}\)] [\(SO_{4}^{2-}\)]

ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20

iii) The reason for the toxicity of \(BaCO_{3}\) even though it is not more soluble that barium sulfate is that \(BaCO_{3}\) can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.

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Answer:

MA'AM I BELIVEVE THE ANSWER IS Z

HOPE THIS HELPS

Explanation:

-TJ

In the experiment performed on the compost:

Variables in an experiment are factors that are under the control of the researcher and which brings about changes in the result of the experiment.

There are three types of variables in an experiment, they are;

The independent variable is the variable which affects the result of the experiment by controlling the dependent variable.

The dependent variable changes as a result of changes in the independent variable.

The constant variable is kept constant or unchanged by the researcher.

Considering the experiment performed on the compost:

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Answer:

3

Explanation:

Answer:

bar

Explanation:

yes

200 cm³ of water would be required to be added to the initial solution in order to give the correct concentration.

It is given that the initial concentration is 0.5 M but the desired (final) concentration is 0.1 M.

The final concentration can be calculated using the following equation:

M₁V₁ = M₂V₂

where M₁ is the initial concentration, V₁ is the initial volume, M₂ is the final concentration, and V₂ is the final volume.

Here, M₁ is 0.5, V₁ is 50cm³ , M₂ is 0.1M and V₂ is to be found out. By rearranging we get,

V₂  = M₁V₁/M₂

     = 0.5 x 0.05/0.1                                            

     = 0.25 dm³

V₂ = 250 cm³

Therefore, the final volume is 250cm³  and the initial volume is 50 cm³ , then the amount of water required would be,

Water required to be added = Final Volume - Initial volume

Water required = 250-50

Water required  = 200cm³

Thus, it means that 200 cm³  of water is required to be added to the acid in order to arrive at the desired (0.1 M) concentration.

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Answer: Handwashing. It is estimated that washing hands with soap and water could reduce diarrheal disease-associated deaths by up to 50% 1. Researchers in London estimate that if everyone routinely washed their hands, a million deaths a year could be prevented 2.

Explanation:

Answer:

When a solid dissolves the solid (solute) and the liquid (solvent) form a very close intimate mixture called a solution. :)

(Brainliest?)

Explanation:

Answer:

liquid matter

Explanation:

Answer:

Explanation:

The mass of sulfur in a sample of Caso with a mass of 89.5 g is 17.35 g.

The chemical formula of Caso is CaSO4, which indicates that each mole of Caso contains one mole of sulfur. To find the mass of sulfur in a sample of Caso, we need to first calculate the number of moles of calcium and oxygen in the given 18.5 g sample:

Moles of Ca = 5.45 g / 40.08 g/mol = 0.136 mol

Moles of O = 8.70 g / 32.00 g/mol = 0.272 mol

The mole ratio between Ca and SO4 in CaSO4 is 1:1, so the number of moles of sulfur in the sample is equal to the number of moles of Ca:

Moles of S = Moles of Ca = 0.136 mol

To find the mass of sulfur in the given 18.5 g sample, we can use the molar mass of CaSO4:

Molar mass of CaSO4 = 40.08 g/mol + 32.06 g/mol + 4*(16.00 g/mol) = 136.14 g/mol

Mass of 18.5 g Caso sample = 18.5 g

Moles of CaSO4 in the sample = 18.5 g / 136.14 g/mol = 0.1356 mol

Finally, we can calculate the mass of sulfur in the 18.5 g sample:

Mass of S = Moles of S x Molar mass of S = 0.136 mol x 32.06 g/mol = 4.35 g

However, this is not the mass of sulfur in a sample of Caso with a mass of 89.5 g. To find that, we can use the following proportion:

Mass of S in 18.5 g sample / Mass of Caso in 18.5 g sample = Mass of S in 89.5 g sample / Mass of Caso in 89.5 g sample

Solving for the unknown mass of sulfur in the 89.5 g sample, we get:

Mass of S in 89.5 g sample = (Mass of S in 18.5 g sample / Mass of Caso in 18.5 g sample) x Mass of Caso in 89.5 g sample

Mass of S in 89.5 g sample = (4.35 g / 18.5 g) x 89.5 g = 21.12 g

Therefore, the mass of sulfur in a sample of Caso with a mass of 89.5 g is 21.12 g.

The mass of sulfur in a sample of Caso with a mass of 89.5 g is 17.35 g. We calculated this by first determining the number of moles of Ca and O in the given 18.5 g sample, then using the mole ratio between Ca and SO4 to find the number of moles of S in the sample. We then used the molar mass of CaSO4 to calculate the mass of sulfur in the 18.5 g sample, and finally used a proportion to find the mass of sulfur in the 89.5 g sample.

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To determine the temperature at which an exothermic reaction ceases to be spontaneous, we need to calculate the Gibbs free energy change (ΔG) and use the equation ΔG = ΔH - TΔS.

Given that ΔH = -71 kJ/mol and ΔS = -58 J/K·mol, we can calculate ΔG at different temperatures to determine the temperature at which the reaction becomes non-spontaneous.

At a temperature of 0 K, ΔG = ΔH, since TΔS = 0. Thus, ΔG = -71 kJ/mol.

As the temperature increases, TΔS becomes more negative, which means that ΔG becomes more negative, making the reaction more spontaneous.

At a certain temperature, however, ΔG will become positive, which means that the reaction is no longer spontaneous and will not proceed on its own. This temperature can be found by rearranging the equation ΔG = ΔH - TΔS to T = ΔH / ΔS, and substituting the known values for ΔH and ΔS:

T = ΔH / ΔS = -71 kJ/mol / (-58 J/K·mol) = 1230 K

So, the reaction will cease to be spontaneous at a temperature of approximately 1230 K.

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer: its side ways

Explanation:

When two atoms are held together by a force created by a difference in electrical potential, the force is due to the electrostatic interaction between the two atoms.

This force can either be attractive or repulsive depending on the sign of the electric charges. For instance, if two atoms have the same electric charge, the force between them will be repulsive. However, if they have opposite electric charges, the force will be attractive, and the atoms will be held together. This is the basic concept behind chemical bonding.

Chemical bonding refers to the force that holds two or more atoms together to form a molecule or compound. There are various types of chemical bonds, including covalent bonds, ionic bonds, and metallic bonds. Covalent bonds occur when atoms share electrons to form a stable compound. Ionic bonds occur when one atom transfers an electron to another atom to form an ion. Metallic bonds occur when atoms share electrons freely in a metal lattice.

Therefore, two atoms held together by a force created by a difference in electrical potential experience an attractive or repulsive force, depending on their charges. The type of chemical bond that forms between the two atoms will depend on the nature of their charges and the number of electrons that they share or transfer.

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The salt obtained from the combination of the weak acid cyanic acid, hcno, and the weak base ammonia, nh3, is used to make an aqueous solution. is the solution basic.

The weak acid of such a buffer system is created when it interacts with both the conjugate base of the buffer system. The pH then just slightly declines, the weak acid concentration rises, and the conjugate base concentration falls.

The acid and base would react to create an acidic solution in a weak base-strong acid titration. During the titration, a conjugate acid would be created, which will subsequently react with water to create hydronium ions. Consequently, a solution with such a pH under 7 is produced.

Therefore, The salt obtained from the combination of the weak acid cyanic acid, hcno, and the weak base ammonia, nh3, is used to make an aqueous solution. is the solution basic.

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Counterfeiting or unauthorized distribution can be a significant problem for manufacturers, as it results in the loss of control over their products when they end up in the hands of unauthorized distributors and resellers.

Counterfeiting and unauthorized distribution pose serious challenges for manufacturers across various industries. When products fall into the hands of unauthorized distributors and resellers, manufacturers lose control over their distribution channels, pricing, and quality assurance. Counterfeit products, in particular, are imitations or replicas of genuine products, often designed to deceive consumers by mimicking the appearance and packaging of the original product.

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Answer:

The combustion of hydrogen–oxygen mixtures is used to produce very high temperatures (approximately 2500 °C) needed for certain types of welding operations. Consider the reaction to be

H2(g)+1/2O2(g)=H2O(g)

change in enthalpy is -241.8 kJ

What is the quantity of heat evolved, in kilojoules, when a 160  g mixture containing equal parts of  H2 and O2 by mass is burned?

Explanation:

i hope this help sorry if it does not ok bye luv!!!

Answer:

it would be OA that is negatively charged