What mass (in g) of nh3 must be dissolved in 759 g of methanol to make a 0.350 m solution?

Skeletal muscle was the Effector in the reaction time test and motor response reflects the muscular component of reaction time.

The Effector in the reaction time test was the skeletal muscle in the finger which is used to press the button. muscle and glands produces a specific response to a stimuli's and the motor response was reaction time test is the time between electromyographic activity and movement and the motor response is the response which reflects the skeletal muscle component of reaction time.

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Therefore, the factors that affect E2 and E1 reactivity are different, and we need to consider them separately when ranking the alkyl halides.

To rank the alkyl halides in order of increasing E2 reactivity, we need to consider the steric hindrance around the carbon that bears the halogen. The more substituted the carbon is, the more difficult it is for the nucleophile to approach it, making the reaction slower. Therefore, the order of increasing E2 reactivity is: A (least substituted) < B < C < Br < Cl (most substituted).
On the other hand, to rank the alkyl halides in order of increasing E1 reactivity, we need to consider the stability of the carbocation intermediate that is formed during the reaction. The more stable the carbocation is, the faster the reaction will be. Therefore, the order of increasing E1 reactivity is: Cl (most stable carbocation) < Br < C < A < B (least stable carbocation).
It is important to note that E2 reactions occur via a one-step concerted mechanism, where both the leaving group and the nucleophile attack the substrate simultaneously. In contrast, E1 reactions occur via a two-step mechanism, where the leaving group departs first, leaving behind a carbocation intermediate that is then attacked by the nucleophile.

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It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

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When we bring a magnet near the doorbell when it is not connected to the battery, we feel a pull, or an attractive force.

For this the hypothesis can be:

Hypothesis: If there is no permanent magnet in the doorbell, just metal like iron, then when we bring a paper clip to the doorbell, we will observe an attractive force between the paper clip and the doorbell due to the interaction between the magnet and the iron in the doorbell.

Hypothesis: If there is a permanent magnet in the doorbell, then when we bring a paper clip to the doorbell, we will observe a stronger attractive force between the paper clip and the doorbell due to the interaction between the magnet and the metal components (such as iron) in the doorbell.

Thus, these can be the Hypothesis for the given scenario.

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The new pressure of the gas is 2.176atm. Boyle's Law will be applied to this issue. According to this rule, the pressure and volume fluctuate inversely when a gas is kept in a closed container and maintained at a constant temperature.

Given,

a sample of gas occupies 4 liters (V1)

the volume is changed to 2 liters (V2)

Temperature(T1) =25C

STP means p = 1 atm and T = 273.15 K

T2 = 25 + 273.15 = 298.15 K

The following is its mathematical expression:

p1V1 / T1 = p2V2 / T2

1 x 4 / 273.15 = p x 2 / 298.15

= 0.0146 = p*2/298.15

= 0.0146 *298.15 = 2p

  2p = 4.352

therefore,

p = 4.352/2

p = 2.176

p = 2.176 atm

the new pressure of the gas is 2.176atm.

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SN2 is a type of reaction that takes place in a one-step mechanism. It is bimolecular, which means that both the nucleophile and the substrate are involved in the rate-limiting step (slowest step). As the nucleophile attacks the electrophilic carbon, the leaving group departs. This results in a complete inversion of the stereochemistry.

The following alkyl halide reactions result in SN2 reaction:CH3CH2CH2Br+CH2O-. CH3OH.CH3CH2CH2Br+HS-.

CH3OH.SN1 is a type of reaction that occurs in two stages. It is unimolecular in nature, which means that the substrate is involved in the rate-determining step. It is bimolecular and results in the anti-elimination of the leaving group and the proton that is adjacent to it. Because the elimination takes place through the most stable orientation, it is also known as the "anti-periplanar elimination."

In the first step, the leaving group departs, forming a carbocation. In the second step, a base attacks the carbocation, causing the product to form. The following alkyl halide reactions result in E1 reaction:CH3CH2-C-Br+CH3OH. ->. CH3CH2-C-O-CH3+HBr.

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Answer:

Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. Neutron Number and Mass Number of Chlorine Mass numbers of typical isotopes of Chlorine are 35; 37.

Explanation:

Salt.

Acids and bases, when brought together, form salt and water through a process known as neutralization process. Since NaCl, the salt, is of majority use in the body, the answer to this question is salt.

Answer:

I think its radiant energy.

Explanation:

Answer:

D. Molecules, atoms, electrons.

Explanation:

I did a quiz on this and got it right

Answer:

D. Molecules, atoms, electrons.

Explanation:

i did the test trust i got it right

Answer:

CO2 (g)

Explanation:

In solids the interatomic or intermolecular space is least . It is most pronounced in gases . That is why inter molecular or interatomic attraction is least in gases . That is why gas flows .

Hence , when we try to compress a gas , due to inter molecular space , it is most likely to get compressed . It will be least compressed when we try to compress a solid because of lack of intermolecular space .

Answer:

I would say iconic bond

Explanation:

The word equation for the reaction of lithium with water is:

Lithium + Water → Lithium hydroxide + Hydrogen

The pH of water changes due to the solution being basic because of the dissolved hydroxide.

Due to its lower density than water, lithium floats on the surface while fizzing and emitting hydrogen gas. It gradually transforms into a colorless solution of lithium hydroxide and disintegrates.

In this reaction, 2 moles of Li react with 2 moles of water to form 2 moles of LiOH and 1 mole of hydrogen gas.

Therefore, the correct equation is

2Li + 2H₂O→ 2LiOH + H₂

As, before the pH of water is nearly neutral but with the formation of lithium hydroxide which is a strong base the pH changes to basic.

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The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and chemical properties. The elements are arranged in rows and columns according to their atomic number, which is the number of protons in the nucleus of an atom of that element. There are currently 118 known elements in the periodic table.

The elements in the periodic table are divided into several groups and periods. The groups, also known as families, are vertical columns on the periodic table and are labeled with numbers from 1 to 18. These groups have similar chemical properties and reactivity. For example, the elements in group 1, the alkali metals, are highly reactive and have a single valence electron. The elements in group 17, the halogens, are also highly reactive and have seven valence electrons.

The periods, or rows, on the periodic table are horizontal and are labeled with numbers from 1 to 7. These periods have elements that have a similar number of electron shells. For example, the first period has only two elements, hydrogen and helium, which have one electron shell. The second period has eight elements, lithium to neon, which have two electron shells.

The first element in the periodic table is hydrogen, which has the atomic number 1. It has only one proton in its nucleus and one electron in its outermost shell. The next element is helium, which has the atomic number 2. It has two protons in its nucleus and two electrons in its outermost shell. The rest of the elements are arranged in the table according to their atomic number, with the lightest elements at the top left of the table and the heaviest elements at the bottom right.

There are several notable elements in the periodic table, such as carbon, which is the basis of all living organisms; oxygen, which is essential for breathing; and iron, which is a crucial component of hemoglobin and is vital for the transport of oxygen in the blood. Other elements like sulfur, phosphorus, and chlorine are also important for life and have a wide range of uses in industry and medicine.

In summary, The periodic table is a useful tool for organizing and understanding the chemical elements, which are arranged in rows and columns according to their atomic number, electron configurations, and chemical properties. There are currently 118 known elements in the periodic table, each with its unique properties and uses.

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Answer: 0.18 M

Explanation:

Initial molarity, M1 = 0.8 M

Initial olume, V1 = 225 ml

Final volume, V2 = 1000 ml

Final Molarity, M2 = M1V1/V2

= 0.8 x 225/1000

= 0.18 M

Answer:

6

Explanation:

Answer:

6

Explanation:

The outer shell refers to the number of Valence electrons. The electron Configuration for oxygen is 2 - 6. So there are 6 electrons in the outer shell of Oxygen

Answer and Explanation:

El bicarbonato de sodio (o carbonato ácico de sodio, NaHCO₃) es utilizado como antiácido debido a que neutraliza al ácido clorhídrico (HCl) en el estómago. Al ser disuelto en agua, el NaHCO₃ se disocia en iones como sigue:

NaHCO₃ → Na⁺ + HCO₃⁻

El anión bicarbonato (HCO₃₋) sufre hidrólisis, aceptando H⁺ del agua y  liberando iones hidroxilo (OH⁻):

HCO₃⁻ + H₂O → H₂CO₃ + OH⁻

Por lo tanto, la solución de NaHCO₃ es básica y sus aniones OH⁻ pueden neutralizar los H⁺ del HCl en el estómago, reduciendo la acidez.

Answer:

The answer is mutualism

Answer:

Ocean water must evaporate into the sky and then cool down to the proper temperature in order to fall as snow. When the temperature is sufficient enough for the liquid water to change state and become water vapor, such as in the ocean, water evaporates from bodies of water.

Ocean water goes through a process called the water cycle in order to fall as snow. The water cycle is the continuous movement of water between the Earth's surface, atmosphere, and oceans. Here is a summary of the process that ocean water goes through to fall as snow:

This process is constantly occurring, so ocean water is always going through the water cycle and can fall as snow at any time.

Answer:

\(2.47x10^{25}atoms\)

Explanation:

Hello,

In this case, since the mineral torbernite has one copper atom, two uranium atoms, twenty oxygen atoms (2x2+4x2+8), two phosphorous atoms and sixteen hydrogen atoms (12x2) and therefore forty one in total, by using the Avogadro's number one is able to compute the total number of atoms in one formula unit or one mole:

\(Atoms=1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O*\frac{41mol\ of \ atoms}{1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O}*\frac{6.022x10^{23}atoms}{1mol\ of \ atoms} \\\\=2.47x10^{25}atoms\)

Best regards.

To find AH°rxn, we use the following equation:

What we're going to do is to sum the enthalpy of the products and then substract with the enthalpy of the reactives:

As you can see, we need to multiply by the coefficients of the reaction.

Now, just replace the values of the table:

So the answer is -822.2kJ/mol.

For b:

Now, just replace the values of the table:

The answer for b is -1036kJ/mol.

Answer:

B: Mechanical waves only.

Explanation:

'Mechanical waves require medium in order to transport their energy from one location to another.'

Hope this helps!

Answer:

Mechanical waves requires matter to carry enegry.

As mechanical waves are defined as the wave which requires any medium to transfer enegry from one place to another place.

so, the answer is Mechanical waves.

hope it helps..

To produce 15 moles of O2, you would need 15 moles of potassium chloride (KCl).

To determine the number of moles of potassium chloride (KCl) needed to produce 15 moles of oxygen (O2) in the decomposition of potassium chlorate (KClO3), we need to consider the balanced chemical equation for the reaction:

2 KClO3 -> 2 KCl + 3 O2

According to the stoichiometry of the reaction, for every 2 moles of KClO3, we obtain 2 moles of KCl. Therefore, the mole ratio of KCl to KClO3 is 1:1.

Since the molar ratio is 1:1, the number of moles of KCl required will be the same as the number of moles of O2 produced. Thus, if we have 15 moles of O2, we will also need 15 moles of KCl.

Therefore, to produce 15 moles of O2, you would need 15 moles of potassium chloride (KCl).

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Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

Bar graphs are the type of graph that can be used when the data measurement between different variable are not continuous or not measured over time.

The advantages of bar graphs include the following:

Therefore, Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

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Answer: 19.4 mL Ba(OH)2

Explanation:

H2(g) + Cl2(g) --> 2HCl(aq) (make sure this equation is balanced first)

At STP, 1 mol gas = 22.4 L gas. Use this conversion factor to convert the 100. mL of Cl2 to moles.

0.100 L Cl2 • (1 mol / 22.4 L) = 0.00446 mol Cl2

Use the mole ratio of 2 mol HCl for every 1 mol Cl2 to find moles of HCl produced.

0.00446 mol Cl2 • (2 mol HCl / 1 mol Cl2) = 0.00892 mol HCl

HCl is a strong acid and Ba(OH)2 is a strong base so both will completely ionize to release H+ and OH- respectively. You need 0.00892 mol OH- to neutralize all of the HCl. Note that one mole of Ba(OH)2 contains 2 moles of OH-.

0.00892 mol OH- • (1 mol Ba(OH)2 / 2 mol OH-) • (1 L Ba(OH)2 / 0.230 M Ba(OH)2) = 0.0194 L = 19.4 mL Ba(OH)2

Therefore, there are approximately 0.1135 moles of sucrose in a can of cola.

Sucrose, also known as table sugar, has the chemical formula \(C_{12}H_{22}O_{11}\). The molar mass of sucrose can be calculated by adding up the atomic masses of each element in the molecule. Carbon, hydrogen, and oxygen are the main elements in sucrose and each have a unique atomic mass. By multiplying the number of atoms of each element by its atomic mass, we get the total molar mass of the molecule, which is 342.34 g/mol. To find the number of moles of sucrose in a sample, we divide the mass of the sample by its molar mass. In this case, 39 g of sucrose represents 0.1135 moles.

\((12*12.01) + (11.16.00) = 342.34 g/mol\)

So the number of moles of sucrose is:

\(\frac{39}{342.34} = 0.1135\)

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The mass number is the atomic mass rounded to a whole number.

The mass number, can be regarded as the atomic mass number or nucleon number, which can be seen as the total number of protons  as well as neutrons in an atomic nucleus however if it is  approximated , it can be considered to be equal to the atomic mass of the atom expressed in atomic mass units.

It should be noted that the mass number is established by rounding the atomic weight to the nearest whole number.

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Answer:

Because both the zones have different compositions.

Explanation:

The continental crust is composed of mainly graphite whereas the oceanic crust is made up of basalt. The oceanic plates are thinner than the continental plates. Also the oceanic plates are much denser as compared to the continental plates. Now the continental plates at the convergent boundary gained thickness as they are pushed upward. These plates or zones are of different composition an densities and so when they collide different features can be seen at the two conversion zones.

Answer:

the atom has equal protons and electrons so it should by without charge

I think this is the correct answer

hope this will help you ❤️