Draw a structural formula for the more stable carbocation intermediate formed in the reaction shown.

The jet stream is one of the key winds that moves air masses at the direction from west to east it moves.

Jet streams are strong winds which are flow in the form of narrow bands in the upper part of the atmosphere. On the earth these winds are flows near the altitude of the tropopause. These winds carries weather systems and blows toward the colder northern air and due to the rotation of earth, its direction is from west to east.

Hence jet streams move winds from west to east direction.

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Answer: From west to east.

Explanation:

Considering the definition of atomic mass, isotopes and atomic mass of an element, the atomic mass of the element is 12.1 amu.

First of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

On the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes.

In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

In this case, the first isotope has an atomic mass of 12 amu and a percent natural abundance of 95 %. The second isotope has an atomic mass of 14 amu and a percent natural abundance of 5 %.

Then, the average mass can be calculated as:

12 amu×0.95 + 14 amu×0.05= 12.1 amu

Finally, the atomic mass of the element is 12.1 amu.

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Answer:

A. 38.4 [gr].

Explanation:

all the details are provided in the attachment, the answer is marked with orange colour.

Answer:

Here all the given options are examples of complex carbohydrates.

Explanation:

As all these contains sugar, starch and fibre.

density of the pumice.

density= mass/ volume (d= m/v)

= 225/236.6

= 0.951g/ml

so, the density of pumice is 0.951g/ml.

[tex]{\boxed{{ formula :}}} [/tex]

[tex] →\bold{Density = \frac{mass}{volume} }[/tex]

[tex]{\boxed{{ Given :}}} [/tex]

[tex]→\bold{Mass = 225 g }[/tex]

[tex]→\bold{ Volume = 236.6 ml}[/tex]

[tex]{\boxed{{ Solution :}}} [/tex]

[tex]→\bold{Density = \frac{mass}{volume} }[/tex]

[tex]→\bold{ Density = \cancel{ \frac{225 g}{236.6 ml}} = 0.951 g/ml}[/tex]

The density of pumice is 0.951 g/ ml .

Answer:

6.2 to 7.0

Explanation:

The “ideal” soil pH is close to neutral, and neutral soils are considered to fall within a range from a slightly acidic pH of 6.2-6.5 to slightly alkaline pH of 7.0-7.5. It has been determined that most plant nutrients are optimally available to plants within this 6.5 to 7.5 pH range, plus this range of pH is generally very compatible to plant root growth.

:-befrank

Answer:The answer is B and CCC

Explanation:

Out of the given chemical changes, the two reactions which are faster are those mentioned in B and C as formation of rust and tarnishing of silver are slow reactions.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

Anabolism builds complex molecules from simpler ones, while catabolism breaks large molecules into smaller ones.

Explanation:

Answer:

160

Explanation:

p*v/t = constant

or

p1*v1/t1 = p2*v2/t2

pressure is not stated in question so we get rid of it on both sides

v1/t1 = v2/t2

we are finding temperature so we flip the entire equation

t1/v1 = t2/v2

200/5 = t2/4

4(200/5) = t2

=160

Answer:

Yes it is 160K as the first person said

Answer:

C

Explanation:

It denotes a loss of 2 protons and 2 neutrons for the atom. As a result, the atom released an alpha particle, which is composed of two protons and two neutrons, hence option C is correct.

The structure of alpha particles, also known as alpha rays or alpha radiation, is similar to that of the helium-4 nucleus and is made up of two protons and two neutrons bonded together.

They often result from the alpha decay process, although they can also result from other processes.

If an atom has 84 protons and 86 neutrons, after the reaction, the atom has 82 protons and 84 neutrons, it suggests that the atom has lost 2 protons and 2 neutrons.

Therefore, the atom emitted an alpha particle in a nuclear reaction, hence option C is correct.

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Answer:

E

Explanation:

The problem with choices A B C D is that the molecular balance numbers are incorrect. E is the only one correctly balanced. For example in A is balanced as

3Mg + 2H2O ===> 3Mg0 + 2H2

The Mg's are correctly balanced.

So are the hydrogens. But take a look at the 0xygens. There are 2 on the left and 3 on the right. The equation is not balanced correctly. B and C have the same problem. One of elements is not balanced correctly.

Answer:

I think its the electron if this is correct can u mark me brainliest?

Answer:

3.99 moles Al₂O₃

Explanation:

The molar mass (g/mol) is used to convert between grams and moles. This value is calculated by taking the individual element molar masses from the periodic table, multiplying them by the corresponding subscripts, then adding them together. Al is 26.98 g/mol and has a subscript of 2. O is 16.00 g/mol and has a subscript of 3. So, the molar mass of Al₂O₃ is 101.96 g/mol.

2(26.98 g/mol) + 3(16.00 g/mol) =  101.96 g/mol

Since it is 101.96 grams PER one mole, the 101.96 is beside grams in the ratio. When setting up the conversion, you want grams in the demoninator (molar mass ratio) to cancel out the grams in the numerator (given value). Since the given number has 3 significant figures, the answer should also have 3 significant figures.

407 grams Al₂O₃          1  mole Al₂O₃
--------------------------  x   --------------------  = 3.99 moles Al₂O₃
                                     101.96 grams

Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.

The chemical symbol is CO.

Nickel can be extracted from it's ore through extractive metallurgy. This entails the process of conventional roasting and reduction processes of nickel ore which will produce nickel metal which is greater than 75% purity. In stainless steel applications, 75% pure nickel can be used without been purified furthe purification which depend the components impurities of impurities present in it. Carbon monoxide is use as the reducing agent as it reduce it from nickel oxide to nickel metal.

Therefore, Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.

The chemical symbol is CO.

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Answer:

Answer A

Explanation:

atmosphere is made up of approx 78% N and 21% O2

Answer: try thinking with your eyes close

Explanation:

Answer:

No.

Explanation:

No organism can detect X-rays or radio waves

Answer:

no

Explanation:

Many animals, including vampire bats and certain fish and snake species, are able to sense infrared radiation, but this only goes up to wavelengths of 1mm. Longer wavelengths carry much less energy and can't be detected without some kind of resonator to amplify the signal.

The temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.

The temperature change of a calorimeter can be calculated using the following expression:

E = mc∆T

Where;

400 = 10 × 4.18 × ∆T

400 = 41.8∆T

∆T = 400/41.8

∆T = 9.57°C

Therefore, the temperature change if 400 J of energy is added to 10 grams of water is 9.57°C.

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Answer:

Zinc metal reacts with excess hydrochloric acid to produce hydrogen gas

Explanation: Acording to the following equation:

Zn(s) + 2HCl(aq)ZnCl2(aq) + H2(g)

The product gas, H2, is collected over water at a temperature of 20 °C and a pressure of 753 mm Hg. If the wet H2 gas formed occupies a volume of 5.39 L, the number of moles of Zn reacted was  mol. The vapor pressure of water is 17.5 mm Hg at 20 °C.

In the video "Are Wormholes The Answer To Time Travel?"Wormholes have been described as hypothetical space-time tunnels or bridges connecting two different locations in space-time allowing faster-than-light travel or perhaps time travel.

Investigating the question of whether wormholes can be used for time travel is "Are wormholes the answer to time travel?" The film explains that wormholes are hypothetical constructs that can join two different points in space-time, allowing travel faster than the speed of light and even time travel.

The video discusses the characteristics of wormholes, including their size, shape, and possible existence. In the film, several ideas and models, such as Einstein's theory of general relativity and the idea of ​​negative energy, have been put forward by physicists and other scientists to explain the potential of wormholes.

Therefore, in the video "Are Wormholes The Answer To Time Travel?"Wormholes have been described as hypothetical space-time tunnels or bridges connecting two different locations in space-time allowing faster-than-light travel or perhaps time travel.

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Answer:

[tex]\huge\boxed{\sf C. \ 6}[/tex]

Explanation:

Orbitals:

Types:

There are 4 types of main orbitals.

[tex]\rule[225]{225}{2}[/tex]

Answer:

In scientific reasoning, a hypothesis is constructed before any applicable research has been done. A theory, on the other hand, is supported by evidence: it's a principle formed as an attempt to explain things that have already been substantiated by data.

Explanation:

Answer:

about 100 degrees Celsius

Explanation:

i dont cap

Answer:

36 grams

Explanation:

Na    22.989

O       15.999

H     1.008          total  39.996   gm per mole

80 grams    is    80 / 39.996 = ~ 2 moles

From the equation each mole of NaOH used results in ONE mole of H2O

   so you will get two moles of H20

       (1.008 *2 + 15.999)   * 2 =  ~ 36 gm

Answer:

95.965 grams

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of NH₃, then 3.4×10²⁴ molecules are contained in how many moles of NH₃?

amount of moles of NH₃= (3.4×10²⁴ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of NH₃= 5.645 moles

Being the molar mass of NH₃, that is, the amount of mass that a substance contains in one mole, 17 , then the amount of mass that 5.645 moles of the compound contain can be calculated as:

5.645 moles× 17=  95.965 grams

Finally, 95.965 grams of NH₃ are in 3.4×10²⁴ molecules of NH₃.