When heated, allyl aryl ethers and allyl vinyl ethers undergo a reaction called a Claisen rearrangement, a concerted reorganization of bonding electrons similar to the Diels-Alder reaction. The reaction proceeds through a six-membered, cyclic transition state. Draw the structure of the expected product when this compound undergoes a Claisen rearrangement.

Answer:

It's evidence of a likely mass extinction.

Within an ecosystem, the sudden  disappearance of a type of fossil record is evidence of mass extinction.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

n = 3

l = 0, 1, or 2

m_l = -2, -1, 0 , 1 or 2.

m_s = +½ or -½

Explanation:

The atomic number of manganese is 25 and as such it's electron configuration is;

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

The circled electron is part of the 5 electrons in the 3d orbital.

In this place, the main energy level which is the principal quantum number is n = 3 while the azimuthal quantum number is l = 2.

Thus,l can either be 0, 1, or 2

Now; if l = 0, then it means ml = 0

if l = 2, then it means the magnetic quantum number m_l from - l to + l could be -2, -1, 0 , 1 or 2.

Also, we know that the spin quantum number m_s could be +½ or -½

1. Eliminate Food Waste

Food waste in the US occurs mostly in stores and at home—either because it spoils on the store shelf or before we can eat it. According to an NRDC study, Americans throw away up to 40 percent of the food they buy. We can combat food waste by shopping for what you need, eating leftovers, composting scraps, and donating excess to food banks. You can find a local food bank at FeedingAmerica.org. Project Drawdown estimates that curbing food waste could avoid a whopping 70.5 gigatons of CO2—that’s a bigger impact than restoring 435 million acres of tropical forest.

2. Eat Plant-Based

Transitioning to a vegetarian diet can cut your carbon footprint in half, and going vegan, even lower. Even shifting from high to low meat consumption can shrink your footprint by a third, according to a University of Oxford study. If half of the world’s population reduced meat consumption and avoided the associated deforestation caused by agriculture, we could reduce carbon emissions by 66 gigatons.

3. Use Clean Energy

Renewable energy is fundamental to powering the world as we move away from fossil fuels. Modeled after World War II “war bonds,” Clean Energy Victory Bonds—a bill introduced to Congress by Sen. Udall (D-NM), Reps. Lofgren (D-CA), and Reps. Matsui (D-CA)—would offer Treasury bonds as low as $25 to finance the government’s clean energy programs. Ask your representatives to support this bill to make Clean Energy Victory Bonds a reality. Additionally, you can purchase renewable energy from installers such as Blue Pacific Solar and RGS Energy, as well as plug into renewable utilities with Clean Choice Energy and Arcadia Power, which don’t require you to install any new hardware in your home to get sun- and wind-power.

4. Participate in the Democratic Process

Climate change has implications on local, national, and global levels. While the average person isn’t responsible for governing a nation, we are responsible for deciding who does. Vote for a climate activist, support comprehensive climate policies, and use your citizen voice to contact legislators when you disagree. The results of upcoming elections will determine how Americans and their elected leaders grapple with catastrophic climate change.

5. Divest

The largest source of greenhouse gas emissions come from fossil fuels. Divesting means taking your money out of institutions that fund fossil fuel expansion, which could eventually dry up funding to those projects. So far, the fossil fuel divestment movement has removed $9.94 trillion dollars from fossil fuel companies because of institutional divestments and $5.2 billion thanks to 58,000 individual divestments. You can build a fossil-free portfolio with our nationwide network of socially-responsible investing financial advisors which you can find on GreenPages.org and by encouraging your faith organization or alma mater to divest.

6. Improve Insulation

One of the most cost-effective and accessible tactics to combating the climate crisis is better insulation. Older homes can lose up to 35 percent of heat through their walls. Modern insulation reduces the energy needed to heat a home, therefore reducing emissions and saving you money. If even half of existing buildings installed thicker insulation, 8.3 gigatons of emissions could be avoided—that’s more than overhauling efficiency for the entire international shipping industry.

8. Rethink Transportation

Overhauling the world’s transportation systems, both commercial and personal, would save as much CO2 as one billion acres of regenerative agriculture. Commercial trucks alone account for six percent of the world’s emissions—more than the collective emissions of airplanes around the globe. While individuals can’t revolutionize the shipping, flight, and automobile industries overnight, we can demand they change by voting with our dollars for public transit, using electric or hybrid vehicles, and reducing our total trips taken.  

9. Recycle

Acquiring virgin resources—from logging trees to mining minerals—exploits more resources than recycling existing materials. For example, recycled aluminum products use 95 percent less energy than creating new ones. About 50 percent of recycled materials come from households; if that number were to increase to 65 percent, at-home recycling could prevent 2.8 gigatons of carbon emissions. However, recycling wrong can slow the system and create more waste, so be sure to rinse out your recyclables and stay up to date on local regulations to make sure what you recycle isn’t causing contamination.

Answer:

HClO₃ /chloric acid /suffix -ic/ ClO₃⁻ (chlorate)

HClO₂/ chlorous acid/ suffix -ous/ ClO₂⁻ (chlorite)

HNO₃ /nitric acid /suffix -ic/ NO₃⁻ (nitrate)

HNO₂/ nitrous acid/ suffix -ous/ NO₂⁻ (nitrite)

Explanation:

Chlorine has 4 positive oxidation numbers to form oxyacids: +1, +3, +5 and +7.

Nitrogen has 2 positive oxidation numbers to form oxyacids: +3 and +5.

Answer:

173.5 g

Explanation:

This question seems incomplete, as the power by which 10 is increased is missing. I will answer this question assuming the given number of molecules is 7.03x10²³ molecules. A different number of molecules will give a different answer, but the procedure remains the same.

First we convert the given number of molecules into moles, using Avogadro's number:

Then we convert magnesium nitrate moles into grams, using its molar mass:

Answer:

0.125 moles of solute

Explanation:

The formula for molarity (M) is moles of solute/liters of solution. First, convert 250 mL into liters:

250 mL/1 * 1 L/1000 mL = 0.25 L.

Then, plug in the values of m/L = M

m/0.25 = 0.5

Solve for moles (m). You would multiply 0.5 by 0.25.

m = 0.125

Lastly, if you'd like to check it and see if it's correct, do 0.125/0.25, and you should get 0.5 M.

Answer:

[tex]\boxed {\boxed {\sf 0.125 \ mol }}[/tex]

Explanation:

Molarity is a measure of concentration. It is the moles of solute per liters of solution.

[tex]molarity = \frac{ moles \ of \ solute}{ liters \ of \ solution}[/tex]

We know the solution has a molarity of 0.5 M or moles per liter. There are 250 milliliters of solution. First, we need to convert to liters. 1 liter is equal to 1000 milliliters.

Now we can substitute the values we know into the formula.

[tex]0.5 \ mol/L= \frac{ x}{0.25 \ L}[/tex]

Since we are solving for the moles of solute, we need to isolate the variable x. It is being divided by 0.25 L. The inverse of division is multiplication. Multiply both sides by 0.25 L.

[tex]0.25 \ L *0.5 \ mol/L= \frac{ x}{0.25 \ L}*0.25 \ L[/tex]

[tex]0.25 \ L * 0.5 \ mol/L =x[/tex]

[tex]0.25 * 0.5 \ mol=x[/tex]

[tex]0.125 \ mol =x[/tex]

0.125 moles of sodium phosphate are needed to make 250 mL of a 0.50 M solution.

Answer:

[tex]m_P=4.75x10^{19}g\ P[/tex]

Explanation:

Hello there!

In this case, according to the given atoms of phosphorous, it is possible to calculate the mass of those atoms by bearing to mind the definition of mole in terms of the Avogadro's number; which refers to the mass and amount of particles in one mole of any element as equal to the atomic mass and the Avogadro's number respectively:

[tex]1 molP=6.022x10^{23}atoms\ P=30.97gP[/tex]

Which is used to obtain the required mass of P:

[tex]m_P=9.23x10^{41}atoms\ P*\frac{30.97g P}{6.022x10^{23}atoms\ P}\\\\m_P=4.75x10^{19}g\ P[/tex]

Regards!

Answer:

Explanation:

From the given information;

The chemical reaction can be well presented as follows:

[tex]\mathtt{SO_{2(g)} + \dfrac{1}{2}O_{2(g)} }[/tex]  ⇄ [tex]\mathtt{3SO_{2(l)}}[/tex]

Now, K is known to be the equilibrium constant and it can be represented in terms of each constituent activity:

i.e

[tex]K = \dfrac{a_{so_3}}{a_{so_2} a_{o_2}^{\frac{1}{2}}}[/tex]

However, since we are dealing with liquids solutions;

[tex]K = \dfrac{1}{\dfrac{Pso_2}{P^0}\Big ( \dfrac{Po_2}{P^0} \Big)^{1/2}}[/tex]   since the activity of [tex]a_{so_3}[/tex] is equivalent to 1

Hence, under standard conditions(i.e at a pressure of 1 bar)

[tex]K = \dfrac{1}{Pso_2Po_2^{1/2}}[/tex]

(b)

From the CRC Handbook, we are meant to determine the value of the Gibb free energy by applying the formula:

[tex]\Delta _{rxn} G^o = \sum \Delta_f \ G^o (products) - \sum \Delta_fG^o (reactants) \\ \\ = (1) (-368 \ kJ/mol) - (\dfrac{1}{2}) (0) - ((1) (-300.13 \ kJ/mol)) \\ \\ = -368 \ kJ/mol + 300.13 \ kJ/mol \\ \\ \simeq -68 \ kJ/mol[/tex]

Thus, for this reaction; the Gibbs frree energy = -68 kJ/mol

(c)

Le's recall that:

At equilibrium, the instantaneous free energy is usually zero &

Q(reaction quotient) is equivalent to K(equilibrium constant)

So;

[tex]\mathtt{\Delta _{rxn} G = \Delta _{rxn} G^o + RT In Q}[/tex]

[tex]\mathtt{0- \Delta _{rxn} G^o = RTIn K } \\ \\ \mathtt{ \Delta _{rxn} G^o = -RTIn K } \\ \\ K = e^{\dfrac{\Delta_{rxn} G^o}{RT}} \\ \\ K = e^{^{\dfrac{67900 \ J/mol}{8.314 \ J/mol \times 298 \ K}} }[/tex]

[tex]K =7.98390356\times 10^{11} \\ \\ \mathbf{K = 7.98 \times 10^{11}}[/tex]

(d)

The direction by which the reaction will proceed can be determined if we can know the value of Q(reaction quotient).

This is because;

If  Q < K, then the reaction will proceed in the right direction towards the products.

However, if Q > K , then the reaction goes to the left direction. i.e to the reactants.

So;

[tex]Q= \dfrac{1}{Pso_2Po_2^{1/2}}[/tex]

Since we are dealing with liquids;

[tex]Q= \dfrac{1}{1 \times 1^{1/2}}[/tex]

Q = 1

Since Q < K; Then, the reaction proceeds in the right direction.

Hence, SO2 as well O2 will combine to yield SO3, then condensation will take place to form liquid.

Answer: -property

Explanation: Transparency is a property  of matter.

Answer: property i think

Explanation:

Answer:

D. Between mountain ranges

Explanation:

Usually in between mountains is where the most grass is.

Answer:

in the interior of continents

Explanation:

Answer:

V = 0.104 m³

Explanation:

Given that,

Number of moles, n = 7.70 moles

Pressure, P = 202.6 kPa

Temperature, T = 59.0°C = 332 K

We need to find the volume of the container that the gas. We know that the ideal gas law is as follows :

[tex]PV=nRT\\\\V=\dfrac{nRT}{P}[/tex], R =8.314 m³-Pa/K-mol

Put all the values,

[tex]V=\dfrac{7.7\times 8.314\times 332}{202.6 \times 10^3}\\\\V=0.104\ m^3[/tex]

So, the volume of the container is equal to 0.104 m³.

Answer:

See below

Explanation:

It is a problem if a computer code has errors or mistakes because if they do, then the whole script will go wrong and chances are that your computer will not work. Each KB of data is crucial to letting the computer function properly. If one of the data is wrong, then the computer code won't work.

Solution :

[tex]$\text{Helium and nitrogen}$[/tex] gases are contained in a conduit [tex]$7 \ mm$[/tex] is diameter and [tex]$0.08 \ m$[/tex] long at 317 K (44°C) and a uniform constant pressure of 1 atm.

Given :

Diameter, D = 7 mm

L = 0.1 m

T = 317 K

[tex]$P_{A1}=0.075 \ atm $[/tex]

[tex]$P_{A2}=0.03 \ atm $[/tex]

P = 1 atm

From, table

[tex]$D_{AB}= 0.687 \times 10^{-4} \ m/s$[/tex]

We know :

[tex]$J_{A}^* = D_{AB} \frac{d_{CA}}{dz}$[/tex]

[tex]$J_A^*=\frac{(0.687 \times 10^{-4})(0.075-0.03)(\frac{101.32}{1 \ atm}) }{8.319 \times 298 \times 0.10}$[/tex]

    = [tex]$1.26 \times 10^{-6} \ kgmol/m^r s$[/tex]

[tex]$P_{B1} = P-P_{A1}$[/tex]

      = 1 - 0.075

      = 0.925 atm

[tex]$P_{B2} = P-P_{A2}$[/tex]

      = 1 - 0.03

      = 0.97 atm

[tex]$J_B^*=D_{AB}\frac{(P_{B1} \times P_{B2})}{RT( \Delta z)}$[/tex]

    [tex]$=\frac{0.687 \times 10^{-4}(0.925-0.97)(\frac{101.32}{1 \ atm})}{8.314 \times 298 \times 0.1}$[/tex]

    [tex]$=-1.26 \times 10^{-6} \ kg \ mol /m^r s$[/tex]

Partial pressure of helium  [tex]$=\frac{0.075+0.03}{2}$[/tex]

                                             = 0.0525 atm

Answer:

[tex]SnS_{2}[/tex]

Explanation:

The formula for tin(IV) sulfide is SnS[tex]_{2}[/tex]

Answer:

I’m pretty sure it’s C

Explanation:

AP Ex

To make 200 mL of a 10% by volume solution, add 20 mL corn syrup to water.

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Answer:

51.1 g NH3

The required chemical reaction is given by:

N2 + 3H2 --> 2NH3

4.5 mol H2 × (2 mol NH3/3 mol H2) = 3 mol NH3

molar mass of NH3 is 17.031 g/mol

3 mol NH3 × (17.031 g NH3/1 mol NH3) = 51.1 g NH3

Answer:

2. bubbles when acid is placed on it.

Explanation:

Minerals can be defined as any form of naturally occurring, inorganic solid substance characterized by a crystal structure. Also, minerals are homogeneous in nature with a defined chemical composition and characterized by a crystal structure comprising of ions, atoms, or molecules in an orderly arrangement.

Generally, molecules attach on the inside of a mineral to give it shape. Therefore, the molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.

Due to the fact that these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.

Additionally, inorganic-crystalline substances which are found naturally within earth are referred to as minerals. Some examples of minerals are iron, copper, aluminum, tin, coal, quartz, feldspar, mica, etc.

The chemical composition or property of a mineral reflect the presence and arrangement of atoms in each. Also, it determines the color and density of a mineral.

In Science, the chemical property of a mineral is evident if the mineral produces a bubble when an acid such as hydrochloric acid (HCl) is placed on it.

Answer: 2

Explanation:

Because the acid bubbles help the mineral break down

Answer:

Red, orange, yellow, green, blue, indigo, violet.

Explanation:

Answer:

Red, orange, yellow, green, blue, purple, violet.

Explanation:

Answer: 103.6 g

Explanation:

On CK-12

Answer:

12 L of O₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CS₂ + 3O₂ —> CO₂ + 2SO₂

From the balanced equation above,

3 L of O₂ reacted to produce 1 L of CO₂.

Finally, we shall determine the volume of O₂ required to produce 4 L of CO₂. This can be obtained as follow:

From the balanced equation above,

3 L of O₂ reacted to produce 1 L of CO₂.

Therefore, xL of O₂ will react to produce 4 L of CO₂ i.e

xL of O₂ = 3 × 4

xL of O₂ = 12 L

Thus, 12 L of O₂ is needed for the reaction.

Answer:

[tex]c=0.133\ J/g^{\circ}C[/tex]

Explanation:

Given that,

Heat required, Q = 512 J

Mass of the substance, m = 255 g

The change in temperature, [tex]\Delta T=15^{\circ} C[/tex]

Let c be the specific heat of the substance. We know that the heat required to raise the temperature is given by :

[tex]Q=mc\Delta T[/tex]

Where

c is the specific heat of a substance

So,

[tex]c=\dfrac{Q}{m\Delta T}\\\\=\dfrac{512}{255\times 15}\\\\c=0.133\ J/g^{\circ}C[/tex]

So, the specific heat of the substance is equal to [tex]0.133\ J/g^{\circ}C[/tex].

Answer:

The right answer is "16.67 mL".

Explanation:

Given:

Molarity of NaOH,

[tex]M_1=6 \ M[/tex]

[tex]M_2=0.2 \ M[/tex]

Volume of NaOH,

[tex]V_1=V \ mL[/tex]

[tex]V_2=500 \ mL[/tex]

As we know, the equation,

⇒ [tex]M_1V_1=M_2V_2[/tex]

On putting the values, we get

⇒ [tex]6\times V=0.2\times 500[/tex]

⇒ [tex]6\times V=100[/tex]

⇒        [tex]V=\frac{100}{6}[/tex]

⇒            [tex]=16.67 \ mL[/tex]      

Answer:

The correct solution is "93.48 M".

Explanation:

According to the question,

The number of moles of NaOH will be:

= [tex]0.753\times 38.5[/tex]

= [tex]28.99 \ mol[/tex]

The number of moles of needed [tex]H_2SO_4[/tex] will be:

= [tex]\frac{1}{2}\times 28.99[/tex]

=  [tex]14.49 \ mol[/tex]

hence,

The concentration of [tex]H_2SO_4[/tex] solution will be:

= [tex]\frac{Number \ of \ moles}{Volume \ of \ solution}[/tex]

= [tex]\frac{14.49}{0.155}[/tex]

= [tex]93.48 \ M[/tex]

Given :

A cylinder of Krypton has contains 17 L of Ar at 22.8 atm and 112 degrees Celsius.

To Find :

How many moles are in the cylinder.

Solution :

We know, by ideal gas equation :

[tex]PV = nRT\\\\n = \dfrac{PV}{RT}[/tex]

Here, R is gas constant and [tex]R = 8.205 \times 10^{-5} \ m^3\ atm\ K^{-1} mol^{-1}[/tex]

Converting all given in required units and putting in above equation, we get :

[tex]n = \dfrac{P\times V}{ R \times T}\\\\n = \dfrac{22.8 \times 0.017}{8.205\times (112+273)}\ moles\\\\n = 1.22 \times 10^{-4} \ moles[/tex]

Hence, this is the required solution.

Answer:

Fe18C2?

not sure

Answer:

B) Gas A has twice the molar mass of Gas B.

Explanation:

Partial pressure of a gas is defined as the moles of the gas/ Total moles of the mixture times total pressure. The equation is:

Partial pressure A = Moles A / total moles * Total pressure

From the definition, we can say that the moles of the gas A are twice the moles of B:

2 Moles A = Moles B

As the mass of both gases is the same but the moles of B are twice the moles of A:

The molar mass of A is twice the molar mass of B

Right answer is:

We have that for the Question " what do we know about the gases?"

It can be said that

From the question we are told

5.00 g of Gas A and 5.00 g of Gas B are mixed in the same container, and the partial pressure of Gas B is determined to be twice that of Gas A

The equation for partial pressure gasA and gasB is given as

[tex]Partial Pressure = \frac{number of moles of }{Total no of moles of gas}[/tex]

That results to,

[tex]\frac{Partial pressure of A}{Partial pressure of B} = \frac{no of moles of A}{no of moles of B}[/tex]

[tex]= \frac{Given mass A}{Molar mass A} * \frac{Molar mass B}{Given mass B}\\\\= \frac{1}{2} = \frac{5*M_B}{M_A*5}\\\\= \frac{1}{2} = \frac{M_B}{M_A}\\\\= M_A = 2M_B[/tex]

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Answer:

Calcium carbonate reacts with hydrochloric acid to form carbon dioxide gas. 2HCl (aq) + CaCO 3(s) CaCl 2 (aq) + CO 2(g) + H 2 O (l).

Answer:

Explanation:...

Answer:

When the concentration of a reactant increases, there will be more chemical present. Due to more reactant particles moving together, more collisions are allowed to happen and with that, the rate of the reaction is increased. So, the higher the concentration of reactants, the faster the reaction rate will be.

Hope this helped you! :)