Draw a picture showing the orbits involved in the sigma and pi bonds including lone pairs of acetone

Explanation:

For sample A, I put the temperature to 93.2 C and sample B to 6.8 C. Once I dragged them together, I noticed that the numbers were going down the second I put them together! Sample A was getting colder and Sample B was getting warmer. As I let both the samples do their thing, I realized they weren't changing temperatures anymore. Both samples stopped at 50.0 C and have never changed temperatures since then.

Answer:

Meiosis

Explanation:

They just split in four.

Answer:

4C2H5NH2(g) + 15O2(g) →  8CO2(g) + 14H2O(g) + 2N2(g)

Explanation:

The balanced chemical equation  for the given chemical reaction is 4 C₂H₅NH₂(g) + 15 O₂(g) →  8 CO₂(g) + 14 H₂O(g) + 2 N₂(g).

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

A satellite campus or branch campus or regional campus is a campus of a university or college that is physically at a distance from the original university or college area. This branch campus may be located in a different city, state, or country, and is often smaller than the main campus of an institution.

Answer: Limitations to population growth are either density-dependant or density-independent. Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size.

Explanation:

The experimental absolute zero value is less when compared to the accepted value of absolute zero.

Absolute zero is defined as the temperature in which the lowest energy possible is attained in a thermodynamic system.

Absolute zero temperature has an accepted values of 0 Kelvin or -273.15 degrees Celsius.

At absolute zero, it is assumed that the volume of an ideal gas becomes zero. However, it has not been possible to cool any gas to absolute zero.

Based on the graph of temperature against volume of gases, the experimental absolute zero extrapolated from the graph where volume of the gases becomes zero is -285 degrees Celsius.

Therefore, the experimental absolute zero value is less when compared to the accepted value.

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Answer:

The experimental absolute zero value is less when compared to the accepted value of absolute zero.What is absolute zero?Absolute zero is defined as the temperature in which the lowest energy possible is attained in a thermodynamic system.Absolute zero temperature has an accepted values of 0 Kelvin or -273.15 degrees Celsius.At absolute zero, it is assumed that the volume of an ideal gas becomes zero. However, it has not been possible to cool any gas to absolute zero.Based on the graph of temperature against volume of gases, the experimental absolute zero extrapolated from the graph where volume of the gases becomes zero is -285 degrees Celsius.Therefore, the experimental absolute zero value is less when compared to the accepted value.

Explanation:

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

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Answer:

[Ar]4s2

Explanation:

Here are the electron configurations for calcium (Ca) and promethium (Pm) in noble gas notation:

Calcium (Ca):

1s2 2s2 2p6 3s2 3p6 4s2

Or in noble gas notation:

[Ar] 4s2

The electron configuration starts with a full 1s orbital, then a full 2s orbital and 2p subshell.

Then the 3s orbital is full and 3p orbital is full, matching the electron configuration of argon. Thus we write [Ar].

After the noble gas core, the next electron go into the 4s orbital, so we write 4s2.

Promethium (Pm):

1s2 2s2 2p6 3s2 3p6 4s2 3d1 4p6 5s2 4d1 6s2

Or in noble gas notation:

[Xe] 6s2 4f4

The electron configuration is similar up to argon.

After the argon core, the electrons fill the 4s and 3d orbitals, then the 4p.

The electron configuration then matches that of xenon, so we write the xenon core as [Xe].

The remaining electrons go into the 6s and 4f orbitals, shown after the noble gas core.

In summary:

Calcium electron configuration in noble gas notation:

[Ar] 4s2

Promethium electron configuration in noble gas notation:

[Xe] 6s2 4f4

The electron configuration in noble-gas notation for Ca (Calcium) is [Ar] 4s2, while for Pm (Promethium), it's [Xe] 6s2 4f5.

The electron configuration of an atom presents the distribution of electrons in atomic orbitals. It's helpful when understanding its atomic structure and chemical behavior.

For the element Ca (Calcium), which is atomic number 20, the noble gas prior to it on the periodic table is [Ar] (Argon). So, the electron configuration in noble-gas notation for Ca is [Ar] 4s2.

For Pm (Promethium), atomic number 61, the closest noble gas is [Xe] (Xenon), thus the notation starts with [Xe]. Pm falls in the 6th period, f-block, therefore following [Xe], the notation should be [Xe] 6s2 4f5.

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Answer:

\(1) \: 1.644 kg = 1.64kg \: in \: three \: significant \: figures. \\ 2) \: 74.2587 L =74.3L \: in \: three \: significant figures. \\

3) 0.00268756 cm \: = 0.00269cm \: in \: three \: significant \: figures. \\ 4) 8907 m = 8910m \: in \: three \: significant \: figures.\)

Answer:

288g

Explanation:

Given parameters:

Number of moles of H₂O  = 16moles

Unknown:

Mass of the water = ?

Solution:

To solve this problem, first find the molar mass of H₂O;

     Molar mass of H₂O = 2(1) + 16  = 18g/mol

Mass of H₂O = number of moles x molar mass

                      =  16 x 18

                      = 288g

7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

What kind of energy is needed to transform a water drop with a 2.20 mm diameter into four smaller drops with the same size?

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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Answer:

C

Explanation:

The nervous system sends signals, or in this case, impulses to parts of your body that direct them to move.

250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Answer:

the liquid becomes equal to the rate of condensation

Explanation:

ive come across this question before! and i think its right! :D

The vapor pressure of a liquid at a provided temperature is measured when the rate of evaporation of a liquid evolves equally to the rate of condensation.

Evaporation is the procedure by which water transforms from a liquid to a gas or vapor.

Evaporation is the primary route that water moves from the liquid circumstances around into the water cycle as atmospheric water vapor.

When a molecule around the surface absorbs adequate energy to overwhelm the vapor pressure, it will exit and join the surrounding air as a gas.

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Answer:

2.25E18

Explanation:

0.000045 g of Carbon x (1 mol C/ 12.01 g C) x (6.02 x 10E23 atoms / 1 mol C)

Start with the mass, then multiply it by the molar mass but put moles on the top and grams on the bottom to cancel out the grams. Then multiply it by Avogadros Constant to get atoms

Answer:

This is true

Explanation:

The balanced chemical equation is CaS + AlC → A + CaC

To balance the chemical equation CaS + AlC → A + CaC, we need to ensure that the same number of atoms of each element is present on both sides of the equation. Here's the step-by-step process to balance the equation:

Begin by counting the number of atoms of each element on both sides of the equation.

Left side (reactants):

Calcium (Ca): 1

Sulfur (S): 1

Aluminum (Al): 1

Carbon (C): 1

Right side (products):

A: 1

Calcium (Ca): 1

Carbon (C): 1

Sulfur (S): 0

Start by balancing the elements that appear in the fewest compounds. In this case, we can balance sulfur (S) first. Since there is only one sulfur atom on the left side and none on the right side, we need to add a coefficient of 1 in front of A on the right side to balance the sulfur.

CaS + AlC → 1A + CaC

Next, balance calcium (Ca) by adding a coefficient of 1 in front of CaS on the left side.

1CaS + AlC → 1A + CaC

Now, balance aluminum (Al) by adding a coefficient of 1 in front of AlC on the left side.

1CaS + 1AlC → 1A + CaC

Finally, balance carbon (C) by adding a coefficient of 1 in front of CaC on the right side.

1CaS + 1AlC → 1A + 1CaC

The balanced chemical equation is:

CaS + AlC → A + CaC

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Answer:

Infinite.

Explanation:

Hello,

In this case, since defined or exact numbers have infinite significant figures, for instance, two cellphones (2.000000000...), three trees (3.000000000...) and so on, for 8 lions we have 8.0000000... which could continue with more zeros until infinity, therefore, 8 lions have infinite significant figures.

Regards.

Answer:

Frequency = 6.67x10¹⁹ s⁻¹

Wavelength = 4.46x10⁻⁷m

e = 2.27x10⁻¹⁹J

Explanation:

To convert frequency to wavelength and vice versa we use the equation:

Wavelength = Speed of light / Frequency

Speed ligth is 3x10⁸m/s

For a wavelength of 4.50x10⁻¹²m:

4.50x10⁻¹²m = 3x10⁸m/s / Frequency

Frequency = 3x10⁸m/s / 4.5x10⁻¹²m

For a frequency of 6.73x10¹⁴s⁻¹:

Wavelength = 3x10⁸m/s / 6.73x10¹⁴s⁻¹

And energy, e, from frequency, is obtained as follows:

e = h ₓ frequency

Where h is Planck's constant, 6.626x10⁻³⁴J*s

e = 6.626x10⁻³⁴J*s*3.43x10¹⁴s⁻¹

The liquid substance used in the laboratory for dissolving dry mortar on floor flies is hydrochloric acid.

Hydrochloric acid is a strong acid that can dissolve many materials, including dry mortar.

Hydrochloric acid also known as muriatic acid or sulfuric acid, are commonly used to dissolve hardened mortar or concrete residues.

To use hydrochloric acid to dissolve dry mortar, you will need to mix the acid with water in a ratio of 1 part acd to 10 parts water.

You should then apply the mixture to the dry mortar using a brush or spray botle.

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Answer:

c.CH4 < NH3 because the NH bond is more polar than the CH bond.

Explanation:

Answer:

\(M+e^-\rightarrow M^+\)

Explanation:

Hello!

In this case, since corrosion is a reaction by which a metal is oxidized to a form in which it has a higher oxidation state due to the fact that it loses electrons and therefore it becomes positively charged. In such a way, for a general metal M, we could have the following corrosion reaction:

\(M+e^-\rightarrow M^+\)

The amount of electrons and the resulting oxidation state depend upon the nature of the metal, for instance, we can see it for silver, zinc and aluminum:

\(Ag+e^-\rightarrow Ag^+\\\\Zn+2e^-\rightarrow Zn^{2+}\\\\Al+3e^-\rightarrow Al^{3+}\)

Best regards!

Answer:

Chemical energy to kinetic energy and gravitational potential energy

Explanation:

The kinetic and potential energy is collectively known as the mechanical energy. When you eat a large meal and then hike up a hill the energy change taking place is Chemical energy to kinetic energy and gravitational potential energy. The correct option is A.

The physical quantity which is transferred from one object to another to perform work or to heat the object is defined as the energy. The SI unit of energy is Joule and it is a derived unit.

The energy possessed by a moving body due to its motion is defined as the kinetic energy. The energy stored by an object due to its position is called the potential energy.

When we eat food, our body uses the chemical energy of food and during climbing, the body gets moved so the kinetic energy gets converted into gravitational potential energy.

Thus the correct option is A.

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The thyroid gland produces and secretes two hormones, thyroxine (T4) and triiodothyronine (T3), which are involved in regulating the body's metabolism.

The thyroid gland is regulated by the pituitary gland, which secretes thyroid-stimulating hormone (TSH). When TSH binds to receptors on the thyroid gland, it stimulates the production and secretion of T4 and T3. These hormones play an important role in the growth and development of the body's tissues and organs, including the brain, heart, and muscles.

If there is an overproduction of thyroid hormones, it can lead to hyperthyroidism, which can cause symptoms such as weight loss, nervousness, and rapid heartbeat. On the other hand, an underproduction of thyroid hormones can lead to hypothyroidism, which can cause symptoms such as fatigue, weight gain, and cold intolerance.

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Answer:

68.4 liters

Explanation:

PV = nR T       R = gas constant = .082057  L atm / K-mole

                        n = 10      T = 27C = 300.15 K

3.6 V = 10 * .082057 * 300.15      solve for V = 68.4 liters