The reaction between bromine and methylpropene is an electrophilic addition. Describe .with the aid of curly arrows ,the mechanism of the reaction. Show that the intermediate and the product along with any dipoles and and lone pair of electron.

Answer:

Explanation:

2AlCl3 → 2Al + 3Cl2

In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.

Answer:

it stays the same

Explanation:

Even though the volume of water changes as it becomes ice, the mass of the water should remain the same before and after it turns into ice.

ANSWER:

3 4 of the original mass has decayed.

EXPLANATION:

After 1 half life, clearly HALF of the original isotope remains. And after TWO half-lives, a HALF + HALF of a HALF, i.e. 3 4 of the original mass has decayed.

Answer:

.821 g/L

Explanation:

It does not matter what the gas is, just the number of moles to calculate volume....

Ideal Gas Law :  

PV = n R T       R = gas constant = .082057 L-atm/(mol-K)  &  T in Kelvin units

(1.18)(V) = 5 * .082057 * (25 + 273.15)

V = 103.67 Liters

NOW ...to calculate density, the gas  IS important...

  mole weight of NH3  (from periodic table) =  17.031 gm/mole

Density =  mass / volume    =    (5 * 17.031) / 103.67 L = .821 gm/L

The molar mass of the compound with 20 l volume of gas with mass of 10.0 g. is 160.51 M.

Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound.

Calculating the moles

Convert Kelvin into Celsius

[tex]\rm PV = nRT\\1 atm. \times 20.0 \times = n \times 8.314 \times 0.15 \circ C\\n = 0.0623[/tex]

Calculating the molar mass

[tex]\rm Molar\;mass = \dfrac{mass}{number\;of\;moles} \\\\Molar\;mass = \dfrac{10.0 }{0.0623} = 160.51 M[/tex]

Thus, the  molar mass of the compound is 160.51 M.

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Answer:

hope it helps cuz i did not really understand

Answer:What is the molarity of a solution made with 126.32 g of sodium hydroxide dissolved to make 874.2 mL of solution? answer. 3.612 M NaOH. 3.612 M NaOH.

Explanation:

The best approach would be to use soap to break up the oil since the soap is biodegradable and has no effect on the environment.

A clean up effort is a deliberate effort to recover the environment after an environmental hazard has occurred such as an oil spill.

In carrying out a clean up exercise, we seek for the most environmentally friendly approach.

In this case, the best approach would be to use soap to break up the oil since the soap is biodegradable and has no effect on the environment.

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Quantitatively, chemical reactions are determined by the reactant as well as product molecules.

A chemical reaction will be preferred as a process that results in the chemical change of one group of chemical substances into another set of chemical compounds.

A reactant would be a material that's also present when a chemical reaction begins. Products are still the substance to the right of the arrow. A product is a material that remains after a chemical reaction has been completed.

Quantitatively, chemical reactions are determined by the reactant as well as product molecules.

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The correct statements which are true for the reactions in the Sun are that are fusion reactions and reactions occur because of very high temperatures.

Nuclear fusion reactions are those reactions in which two species reacts with each other for the formation of new specie.

In the core of the sun, nuclear fusion of hydrogen atoms occur for the formation of helium molecules in the presence of high temperature.

Hence, the correct statements are they are fusion reactions and reactions occur because of very high temperatures.

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The safety data sheet is used while working in a laboratory and handling chemicals. According to SDS, hydrochloric acid should be stored in a cool, well-ventilated area. Thus, option 2 is correct.

Hydrochloric acid has been defined as a strong acid that is liquid formed by the two elements, hydrogen gas, and chloride. Because of their corrosive nature and high reactivity they are recommended to be stored in dark-colored glass bottles.

They should be stored in a cool and well-ventilated area as they can easily react with other metals, alkalis, oxidizing agents, etc. The reaction results in heat formation and gaseous vapors that are harmful when coming in contact.

Therefore, option 2. hydrochloric acid should be stored in dark and cool places.

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Explanation:

To give the glass its final shape and size, it is blown into with a blowpipe, creating a sort of bubble of glass. To carry out this process, the blowpipe holding the glass must be placed on a steel stand. Then, the glass artist has to blow into the blowpipe while rotating it at the same

Taking into account the definition of density, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

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

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, the increase in the volume of water in the cylinder is due to the volume of the metal. This means that the volume of the metal can be calculated by taking into account the volume occupied by the water + the metal and the volume occupied by the water alone in the cylinder.

Then, you know that:

Replacing in the definition of density:

[tex]density=\frac{35 g}{7 mL}[/tex]

Solving:

density= 5 [tex]\frac{g}{mL}[/tex]

In summary, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].

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The mass of the water in the container given the data from the question is 22.5 g

Heat loss = Heat gain

MC(T – Tₑ) = MᵥᵥCᵥᵥ(Tₑ – Tᵥᵥ)

54.3 × 0.128 (384.4 – 297.6) = Mᵥᵥ × 4.184(297.6 – 291.2)

6.9504 × 86.8 = Mᵥᵥ × 4.184 × 6.4

Divide both side by 4.184 × 6.4

Mᵥᵥ = (6.9504 × 86.8) / (4.184 × 6.4)

Mᵥᵥ = 22.5 g

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Answer:

C.

Explanation:

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. ... As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder. Relative sound intensities are often given in units named decibels (dB).

The correct statement about the amplitude of a wave is option C. Thus, the larger the amplitude, the more the energy that is carried by the wave.

Amplitude of a wave is a parameter describing the intensity of the wave. Amplitude of a transverse wave and sinusoidal waves are measured as the distance between from the central point of a crest to its top or the the distance from the central point of the trough in the line to its bottom part.

The amplitude of a wave is directly proportional to the frequency of the wave and the frequency in turn is directly proportional to the energy of the wave.

Therefore, The correct statement about the amplitude of a wave is option C. Thus, the larger the amplitude, the more the energy that is carried by the wave.

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This is not the best way to organize a periodic table because two elements might have similar atomic mass.

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Answer:

hydrogen bonding, hope this helps

Explanation:

The best radioisotope to use in powering planet and space exploration is plutonium-239 since it has the longest half-life of 21400 years.

The half-life ofa radioactive element is the time it takes for half the amount of atoms in the element to spontaneously decay.

The half-life of radioactive elements vary.

The half life of the given radioactive elements are as follows:

Therefore, the best radioisotope to use in powering planet and space exploration is plutonium-239 since it has the longest half-life of 21400 years.

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Answer:

D. ) Plutonium-239

It totally depends on the laser power (mW). The divergence of the light is depending on it.

A device that uses stimulated emission of photons from excited atoms or molecules to produce a strong beam of coherent monochromatic light is a laser.

When electrons in optical materials like glass, crystal, or gas absorb energy from an electrical current or light, a laser is formed.

When a 5mW 650 nm laser glows on a white surface in complete darkness, we can see it from 500 to 1 km distant.

Because of the divergence, the projected dot 1 km distant will be a huge dot with a diameter of 20–30 m30 m and will be extremely dim.

Hence,It totally depends on the laser power (mW). The divergence of the light is depending on it.

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When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.

When we want to open a new slide we will Click on the New Slide button located on the Home tab in the Slides group. The new slide should appear below the selected slide.

So we can conclude that When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.

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Answer is chemical change

Answer:

99%

Explanation:

It have Full cream and it is yummy

Answer:

depends

Explanation:

because some are caused by different variables

The elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.

Elements are arranged in groups in the periodic table based on their number of valance electrons.

Elements in the same group of the periodic table has similar characteristics.

When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions.

The resulting compound is called an ionic compound.

Chlorine is the most reactive non metal and will bond easily with metals. The most reactive metals are found in group one.

Cl⁻ + Na⁺ -------> NaCl

Thus, the elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.

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Answer:

1.11 g

Explanation:

From the answer you're given that HCl is the limiting reactant.

Mg + 2HCl -> MgCl2 + H2

40.0 g

First of all you want to know the moles of HCl you actually have:

40.0 g HCl x  [tex]\frac{1 moles of HCl}{36.45 g/mol}[/tex] = 1.09739 moles of HCl.

Where 36.45 is the molar mass of H (1.008) + Cl (35.45).

Since the limiting reactant is HCl you'll have to discover how much H2 is produced from the limited quantity of reactant you have:

1.09739 moles of HCl x  [tex]\frac{1 moles of H2}{2 moles of HCl}[/tex] = 0.54869 moles of H2 is produced

Now you have to simply convert the moles of H2 in grams:

0.54869 moles of H2 x 2.016 g/mol H2 = 1.106 g

Where 2.016 is the molar mass of H2.

Theoretical yield of hydrogen atom is produced in 2Hcl mg , mgcl₂ and h₂ if 40.0 g of Hcl react with an excess of magnesium is 1.096 moles.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Theoretical yield of hydrogen atom is calculated by using mass amd molar mass of an atom.

2Hcl + mg---> MgCl₂ + H₂

The theoretical yield of hydrogen is calculated as follows

mass/molar mass

40 ÷ 36.5 = 1.096 moles

by use of mole ratio of Hcl to H2 which is 2:1

moles of H2 = 1.096 ÷ 2 = 0.548moles

mass is therefore =  moles x molar mass

that is 0.548moles x 2 = 1.096 grams

Hence, the theoretical yield of hydrogen atom is 1.096 grams.

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The name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

Alkanes belong to the family of  saturated hydrocarbons with carbon carbon single bond.

For the given alkane;

          CH₃    H

 CH₃ -  C   -  C - CH₃

            H      H

Thus, the name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.

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Answer:

2-methylbutane

Explanation:

Answer:

Cu2SO4 is referred to as copper sulphate