Identify the period, group, and valence electrons block of each element.

Problem:
[Ne] 3s² 3p5

P-5, G-17, p
P-6, G-6, d
P-7, no group, f
P-3, G-17, p
P-3, G-14, p

The balloon and the comb definitely have the same electrical charge. Option 2.

According to the law of attraction in physics, like charges repel while unlike charges attract.

Going by this law:

In other words, if 2 objects that have the same charges are brought close to each other, there will be a repulsion. If the 2 objects are of different charges, there will be an attractive force between them.

The students observed that the comb repelled the balloon. The implication is that the comb and the balloon are of the same charge.

This is logical considering the fact that both objects were rubbed against hair. They got their charges during the process of rubbing. An electrostatic force is generated that moves electrons from the hair to the two objects.

Thus, both the balloon and the comb are negatively charged and will, therefore, repel each other.

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Answer: Homogenous mixture

Mixing honey with water will give you a homogenous mixture. It is uniform and even, as the honey particles are distributed equally throughout the water.

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The Vapour pressure of the solution is 99.56 torr

The saturated vapour pressure of the solution maybe lower then the pressure of pure solvent in solution. It is equal to the vapour pressure of the pure solvent at the same temperature scaled by mole fraction of solvent stated by Rault's Law.  

P(solution) = mol fraction of solvent × P° ( solvent)

given, pressure of pure toulene = 40.2 torr

pressure of pure cyclohexane = 125 torr

∴ P (solution) = 0.3 × 40.2 + 0.7 × 125

P (solution) = 99.56 torr

hence, vapour pressure is calculated to be 99.56 torr.

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Answer:

sp³-s sigma bond.

Hope that was the answer

Answer:

I catalyst promoter is the answer

The system should be heated gently so that the solvent boils and the vapors extend no more than halfway up the condenser.

Boiling is the fast vaporization of a fluid, which happens when fluid is warmed to its bubbling point, the temperature at which the vapor weight of the fluid is rise to the weight applied on the fluid by the encompassing air.

There are two fundamental sorts of bubbling: nucleate bubbling where little bubbles of vapor shape at discrete focuses, and basic warm flux bubbling where the bubbling surface is warmed over a certain basic temperature, and a film of vapor shapes on the surface.

In thermodynamics, heating a system, the prerequisite for the bubbling of unadulterated substances to happen is that T divider = T sat. But in genuine tests, bubbling does not happen until the fluid is warmed some degrees over the immersion temperature.

The surface temperature must be to some degree over the immersion temperature in arrange to maintain vapor arrangement.

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The reactivity of a substance with oxygen is a chemical, not a physical property. The reason it is called a chemical property is that it relies on its electron configuration to determine how it behaves around other substances.

A chemical property is a property of any material that becomes apparent during or after a chemical reaction; that is, any quality that can only be determined by changing the chemical properties of a substance.

Oxygen is a very reactive element, is highly paramagnetic and readily combines with other elements. One of the most important chemical properties of oxygen is that it promotes combustion. Even at room temperature, oxygen binds to elements and forms e.g. rust.

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Answer: The part I think you messed up on is the atoms not all of them have 0 and 1. Sodium Chloride has 2 atoms. Other than that it looks amazing! Hope this helps!

The concentration of so2 emitted on a hg/m3 basis is 0.01 M.

Concentration is the abundance of a constituent divided through the full extent of an aggregate. several styles of mathematical description can be distinguished: mass attention, molar awareness, range attention, and quantity attention.

Given the 5 ppmv SO2 and we need to calculate the concentration of SO2 emitted on a µg /m3 basis.

We know,

mg/m3 = ppmv * M/0.08205*T

M = molecular weight of gas = 64.064 g/mol

mg/m3 = 5 ppmv *64.064 g.mol-1/ 0.08205 * 273.15 K

  = 14.28 mg/m3

Now we know

1 mg = 1000 µg

So, 14.258 mg =?

= 14280 µg/m3

We are given partial pressure. P = 0.1 atm.

Henry’s law constant =  0.1 mole/(liter.atm)

C = Kh*P

 = 0.10 mol/L.atm * 0.10 atm

  = 0.01 mol/L

    = 0.01 M

So, the equilibrium concentration of a gas in water is 0.01 M.

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Low pressure systems associated with high temperatures because warm air rises :)

Answer:

The Atomic Number

Explanation:

The atomic number is the number of protons of an atom in its nucleus.

Each element has a unique atomic number.

(view screenshot too, to find where it is in element table)

Answer: Benzylic hydrogen refer to the hydrogen atoms attached to the carbon atom just next to the benzene group. In ethyl benzene carbon next to benzene has two hydrogen atoms only.

Explanation: For example, among the inorganic compounds, oxides contain O 2− ions or oxygen atoms, hydrides contain H − ions or hydrogen atoms, sulfides contain S 2− ions, and so forth.

Answer:

Element XX has a relative atomic mass of 6.86 aum

Explanation:

See attached worksheet.

The molarity of the Vitamin B1 Hydrochloride solution is 0.71M.

We know,

Molarity of a solution is defined as the ratio of the moles of the solute with respect to the volume of the solution in liters.

We know,

Moles = mass of solute dissolved/Molar mass of solute

Given mass of solute is dissolved is 53 grams.

Molar mass of Vitamin B1 Hydrochloride is 337 grams/mol

Moles of Vitamin B1 hydrochloride = 53/337

The volume of the solution is 220 ml.

We know,

1 ml = 1/1000 litres

220 ml = 220/1000 litres

So, putting all the values in the formula of molarity,

Molarity of solution = (53/337)/(220/1000)

Molarity of solution = 0.71

So, the concentration of the Vitamin B1 Hydrochloride is 0.71M.

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There is only one sodium ion for every chlorine ion due to its valency.

The number of electrons that an atom needs to lose or gain in order to achieve a stable electron configuration i.e the octet of an element is known as the valency of an element, which serves as a gauge of that element's potential for combining.

The valency of Sodium (Na) is 1 and that of chlorine (Cl) is also one. therefore they combine to form a stable compound. The same rule follows in the compound formed by Potassium (K) and Oxygen(O) also. The valency of oxygen is 2 which means that it should be surrounded by 2 potassium ions to provide electrons to fulfill both the elements' octets.

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Acetyl-co A containing radioactively labeled carbon atoms when fed to cells produce Co2 which are not radioactive but molecules of citrate and oxalo acetate are radioactive because citrate and oxalo acetate are part of the Krebs Cycle, which is responsible for generating energy in cells.

The Krebs Cycle involves a series of reactions in which acetyl-co A is broken down to generate energy. The carbon atoms in acetyl-co A are gradually transferred to other molecules in the cycle, including citrate and oxalo acetate. As the carbon atoms are transferred, they become radioactive. Eventually, the carbon atoms are transferred to Co2, which is then released from the cells.

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Explanation:

Answer:

ngl ts ngl ts ts ngl...imma keep it a buck.96 ion got the answers kanye do.

Explanation:

Answer:

Explanation:

About 1.3 seconds

It takes light about 1.3 seconds to travel from the moon to the Earth at a distance of 384000 km. This is because the speed of light is about 300000 km/s. So, it takes light about 1.3 seconds to travel from the moon to the Earth.

The heating curve is a graphical representation of how various phases of substances change as temperature or heat increases. The graph's C section depicts the liquid phase of the substance gaining kinetic energy.

Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. When the work is finished, energy is transferred to the object, and it moves at a new constant speed.

Therefore,

Section A represents the solid phase

Section B the solid-liquid phase

Section C the liquid phase

Section D the liquid-gas phase

Section E the gas phase

Section C of the graph depicts the substance's liquid phase gaining kinetic energy. Heat energy is absorbed during Phase C, and liquid particles gain kinetic energy to change into gas form in Section E.

As a result, C.C. is the correct answer.

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Density of a substance is the ratio of its mass to volume. Specific gravity of the substance is the ratio of its own density to the density of water. Thus, dividing its density by density of water.

Specific gravity of an object is the ratio of its density to the density of water. In fact it is related to the gravity itself in water. This ratio determines whether the object float or sink to the bottom of water.

If the specific gravity is greater than one, which means the object is denser than water and it will sink to the bottom of water because of its weight. If the specific gravity is less than one, then the object have less density than water and it will float on water.

All the floating objects have a specific gravity of less than one. Irrespective of the weight of the objects they floats because of their higher density than water.

Ice floats on water where a stone will sink. Similarly large ships, canoes etc are floating because of their smaller specific gravity. This way we can compare the floating property using specific gravity.

Therefore, specific gravity of a substance can be found by dividing its density by the density of water.

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the pressure that will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm is 1.44atm.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.

Mathematically the relation between Pressure and temperature can be given as

P₁M₁=DRT₁

P₂M₂=DRT₂

Rearranging the two equation we get

P₁M₁÷T₁=P₂M₂÷T₂

where,

P = pressure

M= Molarity

D=density

T =temperature

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values, we get

(P₁×M₁)÷T₁=(P₂×M₂)÷T₂

(P₁×20)÷303=(1.0 ×28)÷293

P₁=1.44atm

Therefore, the pressure that will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm is 1.44atm.

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By using the data given in the text and the specific heat capacity of water and its density, we can calculate that the amount of heat produced by hydrocarbon combustion was 233.6 kJ.

The heat released by hydrocarbon combustion is absorbed by the calorimeter and the water in it. To calculate the amount of heat (Q) produced by the combustion, we are going to use the specific heat capacity of water (c = 4.186 J/g°C), the heat capacity of the calorimeter (q = 68.5 J/°C) and the difference in temperature (ΔT = 54.91 °C):

heat absorbed by the calorimeter = ΔT*q

heat absorbed by water = ΔT*c*m

Q = ΔT*q + ΔT*c*m

m - the mass of water

To obtain the mass of water, we are going to use the volume (V = 1000 mL) of water and its density (d = 1.00 g/mL):

d = m/V ⇒ m = d * V

m = 1.00 g/mL * 1000 mL

m = 1000 g

Now we can plug all the known values in the formula for Q:

Q = 54.91 °C * 68.5 J/°C + 54.91 °C * 4.186 J/g°C * 1000 g

Q = 233,614.595 J

Q = 233.6 kJ

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The rate of the reaction if the concentration of ethanol was doubled will remain the same.

The rate of the reaction tert-butyl ethyl ether, (ch3)3coch2ch3, in acidic conditions, will undergo the SN1 mechanism so the rate of reaction will remain the same.

The rate of reaction is the rate at which a chemical reaction takes region, defined as proportional to the increase inside the concentration of a product in step with unit time and to the lower within the awareness of a reactant in line with unit time. response prices can vary dramatically.

The speed with which a reaction takes area is called the fee of a response. as instance, timber combustion has a high response rate since the manner is fast, and rusting of iron has a low response rate as the technique is slow. Rate is most customarily calculated by the usage of the equation The devices of rate calculated in this manner are s -1.

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Mendelevium and californium , both synthesize differently because Mendelevium is a synthetic element and californium is a radioactive chemical element.

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To find the number of molecules we must apply for Avogadro's number. This number tells us that in one mole of any substance there are 6.022x10^23 molecules. So the first thing we will do is find the moles contained in 200 grams of C6H12O6 (Glucose).

The molar mass of glucose is 180.06g/mol. So, the moles of glucose will be:

Now, we apply for Avogadro's number. So, the molecules of glucose will be:

Answer: In 200 grams of C6H12O6 there are 6.68x10^23 molecules

Atomic number. should be 120.

due to.... a/q

Alkaline earth metals are part of the eighth group and are known to exist in two groups.

Consequently, the element's atomic number will be 120.

The quantity of protons in an atom's nucleus is known as the atomic number. An element's identity is determined by its proton count (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

A chemical element's atomic number is its position in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also determined by the number of protons, which is always equal to the number of electrons in a neutral atom.

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Answer:

Quickly

Explanation: