Three quantum numbers for an electron in a hydrogen atom in a certain state are
n = 4, e = 1, me = 1. The electron is located in what type of orbital?
a)4p
b)3p
c)4s
d)4d

Answer:

This is required answer.

Explanation:

Given that:

1. by addition the ammonia to acetic acid

using balanced chemical equation:

ammonium acetate:

The balanced equation is:

NH₃ + H₂O ===> NH₄OH

when ammonia gas dissolves in water then we get the base in form of ammonium hydroxide.

When  NH₄OH reacts with CH₃COOH then we get ammonium acetate and water

NH₄OH + CH₃COOH ===> [CH₃COO]- & NH₄+ & H₂O

So, we can say that,

when we are adding an acid and a base together then we get the product of H₂O and given elements.

2. addition of barium hydroxide to sulfuric acid:

The balanced equation is :

H₂SO4+ Ba(OH)₂--> BaSO₄+ 2H₂O

when acid and base reacts together than we get barium sulphate and water

when sulfuric acid and barium hydroxide.

Hence, this is required answer.

If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.

The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:

2PbS + 3O2 -> 2Pb + 2SO2

From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.

To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:

Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol

Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol

Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.

To calculate the mass of Pb, we multiply the number of moles by its molar mass:

Molar mass of Pb = 207.2 g/mol

Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g

This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.

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The effect of adding a solute to a solution is:

D. The solution freezes at a lower temperature and boils at a higher temperature

The edge of boiling over height is the raising of a dissolvable's limit because of the expansion of a solute. Also, the edge of freezing over despondency is the bringing down of a dissolvable's edge of freezing over because of the expansion of a solute. As a matter of fact, as the limit of dissolvable builds, its edge of freezing over diminishes.

Thus, option D is correct.

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Answer:

Kepler- created laws of planetary motion

Galileo- discovered moons of Jupiter; published in Italian

Copernicus-  revived Aristarchus heliocentric model

Explanation:

I hope this helps you! :)

Let me know if you need help with anything else.

Answer:

Neither,energy can be changed from one form to another, but it cannot be created or destroyed.

Explanation:

The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.

Answer:

40 miles

Explanation:

10 miles per hour means she rides 10 miles eery hour that she rides. 10 x 4 = 40

Answer:

T-R-U-E... true?

Answer:

True

Explanation:

Hope this helps

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of object = 64 mL

density = 8 g/mL

The mass is

mass = 8 × 64

We have the final answer as

Hope this helps you

Answer:

Approximately [tex]0.43\; \rm kPa[/tex] (rounded to two significant figures.)

Explanation:

Let [tex]P_0[/tex]. [tex]V_0[/tex], and [tex]T_0[/tex] denote the initial pressure, volume, and temperature of this sample. Let [tex]P_1[/tex]. [tex]V_1[/tex], and [tex]T_1[/tex] denote the final pressure, volume, and temperature of this sample.

Convert the two temperatures to degrees Kelvins:

[tex]T_0 = 15.0 + 273.15 = 288.15\; \rm K[/tex].

[tex]T_1 = (-25.0) + 273.15 = 248.15\; \rm K[/tex].

Based on the assumption that the ammonia sample here is an ideal gas, it should satisfy the ideal gas equation:

[tex]P\, V = n\, R \, T[/tex], where:

The value of the ideal gas constant, [tex]R[/tex], should stay the same during this change.

On the other hand, assume that this sample did not leak during this change. Hence, the number of moles of gas particles in the sample, [tex]n[/tex], should also stay the same during this change.

Therefore:

[tex]\displaystyle \frac{P_0\, V_0}{T_0} = n\, R[/tex].

[tex]\displaystyle \frac{P_1\, V_1}{T_1} = n\, R[/tex].

Combine these two equations to obtain:

[tex]\displaystyle \frac{P_0\, V_0}{T_0} = \frac{P_1\, V_1}{T_1}[/tex].

Rearrange this equation and solve for [tex]P_1[/tex], the final pressure of this sample:

[tex]P_1 = \displaystyle \frac{P_0\, V_0\, T_1}{T_0\, V_1} = \frac{P_0\, T_1}{T_0} \cdot \left(\frac{V_0}{V_1}\right)[/tex].

The question stats that the Initial pressure of this sample is [tex]P_0 = 0.79\; \rm kPa[/tex].

On the other hand, volume "increased by [tex]60.0\%[/tex]" means that the final volume would be [tex](1 + \underbrace{0.600}_{60\%}) = 1.600[/tex] times the initial volume. Therefore:

[tex]\displaystyle \frac{V_0}{V_1} = \frac{V_0}{(1 + 0.600)\, V_0} = \frac{1}{1.600}[/tex].

Solve for the final pressure of this sample, [tex]P_1[/tex]:

[tex]\begin{aligned}P_1 &= \frac{P_0\, T_1}{T_0} \cdot \left(\frac{V_0}{V_1}\right) \\ &= \frac{0.79\; \rm kPa \times 248.15\; \rm K}{288.15\; \rm K} \times \frac{1}{1.600} \approx 0.43\;\rm kPa\end{aligned}[/tex].

(Rounded to two significant digits.)

Explanation:

be2+ stable

Ne stable

Br- stable

h+ notstable

Answer:

All living things, large or small, plant or animal, are made up of cells. Most living things are made up of one cell and they are called unicellular organisms. Many other living things are made up of a large number of cells that form a larger plant or animal. These living things are known as multicellular organisms.

Explanation:

Answer:

n=0.852 moles

Explanation:

Given mass is, m = 19.6 g

The molar mass of sodium is, M = 22.99 u

We need to find the no of moles in 19.6 of Sodium. We know that, no of moles is equal to given mass divided by molar mass.

[tex]n=\dfrac{m}{M}\\\\n=\dfrac{19.6}{22.99}\\\\n=0.852[/tex]

So, there are 0.852 moles in 19.6 g of Sodium.

Answer:

the amount of time he takes to react is the dependent variable

Explanation:

the independent variable is what you intentionally change in an experiment, and the dependent variable is what is changing based off of your independent variable. In this case, the IV is the sounds being played, and the DV is the amount of time it took Robert to react

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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Answer:

C. An organized way to test scientific ideas.

Explanation:

The Scientific Method is a series of steps to test ideas and hypothesizes. We use the Scientific Method to make it easier to organize and label things step by step.

Answer:

It has 3 significant figures

Explanation:

When the number ends on zero that are to the right to the decimal point

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question

mass of glycerol = 20 g

density = 1.261 g/mL

The volume is

[tex]volume = \frac{20}{1.261} \\ = 15.86042823...[/tex]

We have the final answer as

15.86 mL

Hope this helps you

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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By equalising LHS with RHS,balanced chemical equation is:[2] Na + [2] H2O  = [2] NaOH + [1] H2

Balancing is necessary for all chemical equation.The purpose to balance chemical equations are to make both sides of the reaction,reactants and products, equal in the no. of atoms per element.

If Sodium is multiplied by two, the no. of Sodium atoms are in balance.By the process of balancing we can also keep a check on the rightness of the equation.

Sodium hydroxide and Hydrogen gas is product of this reaction.NAOH dissolves in water and contains hydroxide anions(OH-) and sodium cations(Na+).

The balanced equation is 2Na + 2H2O = NaOH + H2

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Answer:

neutron .

Explanation:

they both have an approximate mass of 1a.m.u

Answer: 13.5 minutes to run 3.2 km.

Explanation: To solve this problem, you need to convert the distance from kilometers to miles and the speed from miles per hour to kilometers per hour. 3.2 km is approximately 1.988 miles and 5.5 mph is approximately 8.851 kph. To find the time it takes to run 1.988 miles at 8.851 kph, you can use the formula time = distance ÷ speed. Plugging in the values, you get time = 1.988 miles ÷ 8.851 kph, which simplifies to approximately 0.225 hours or 13.5 minutes.

Therefore, it will take the student approximately 13.5 minutes to run 3.2 km.

Answer:

For the control experiment: [tex]0.0552 M[/tex] of aqueous solution of erioglaucine has absorbance of [tex]0.035 M\\[/tex]

From Lambert-Beer's law we know:

[tex]Absorbance = e\cdot c \cdot l\\[/tex]

Here; e is the molar absorptivity coefficient of erioglaucine

l = length of cuvette in which the solution is taken = [tex]1 cm[/tex]

A sorbance by the erioglaucine = total absorbance - absorbance by distilled [tex]water = 0.331-0.019 = 0.312[/tex]

So; by putting the values in the above equation; we get:

[tex]0.312 = 0.0552 M \cdot e\cdot~1cm\\[/tex]

So; [tex]e = \frac{0.331}{0.0552} M^{-1}cm^{-1}= 5.65 M^{-1}cm^{-1}[/tex]

The molar absorptivity coefficient of erioglaucine is [tex]5.65 M^{-1}cm^{-1}\\[/tex]

The absorbance of erioglaucine in distilled water (contaminated with metal ions) is: [tex]0 .217[/tex]

The absorbance of distilled water is [tex]0.019[/tex]

So; absorbance of erioglaucine itself is : [tex]0.217-0.019 = 0.198[/tex]

Again using Lambert Beer law; we get:

[tex]A= e\cdot c\cdot l[/tex]

[tex]0.198 = 5.65 M^{-1}cm^{-1} \cdot c \cdot 1 cm[/tex] [tex]( c = concentrartion)[/tex]

c = 0.198/5.65 M = 0.035 M

The concentration of the erioglaucine is [tex]0.035 M\\[/tex]

Explanation:

Answer:39866

Explanation:

Multiply mass value by a 1000

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Answer:

The answer is B. peninsula

Explanation:

Answer:

Peninsula

Explanation:

A Peninsula is a large area of land surrounded by water on 3 sides. It is usually larger than a cape

Answer:

To answer this question, we will need to use the gas law which states that:

PV = nRT where:

P is the pressure of the gas = 740 mmHg = 98658.550357 Pascal

V is the volume = 450 ml = 0.45 liters

n is the number of moles that we will calculate

R is the gas constant =  8.314 J/(K. mol)

T is the temperature = 35 celcius = 308 degrees kelvin

Substitute with these values in the above equation to get the number of moles as follows:

98658.550357 * 0.45 = n * 8.314 * 308

n = 17.3375 moles

Each mole contains Avogadro's number of atoms, therefore:

number of atoms = 17.3375 * 6.02 * 10^23 = 1.0437 * 10^25 atoms

Answer:

i need help with that too

Explanation:

Answer:

See explanation

Explanation:

The p orbital is threefold degenerate. This implies that the p-sublevel is composed of three orbitals; px, py and pz.

According to Hund's rule, electrons occur singly when filling degenerate orbitals before pairing takes place. Since the three orbitals are degenerate, any of px, py or pz may be first filled.

If one lobe of any of the px, py or pz is first filled, the next electron must go into the next degenerate orbital. When all are filled, pairing of electron spins may now begin.

Based on Hund's rule the electron is most like to be found in Px, Py or Pz, and it will fill them singly before paring.

The P-orbital has three sub-orbitals or degenerate orbitals such as Px, Py and Pz which an electron occupy at a time before paring.

The maximum electron in P-orbital is 6 electrons, each degenerate orbital will contain maximum of 2 electrons.

According to Hund's rule, electron will fill the degenerate or sub-orbitals singly first before paring.

Thus, we can conclude that based on Hund's rule the electron is most like to be found in Px, Py or Pz, and it will fill them singly before paring.

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Answer:

no

Explanation:

if you are referring to the first question, the answer is no. the equation is unbalanced because the left side has 4 hydrogens and the right has only 2, and the left has 2 oxygens while the right has 3. this means it does not follow the law of conservation of mass because each side has a different mass.

Answer:

it 3

Explanation: