Draw the structures of the aldol addition and condensation products of pentanal

The hours taken for concentration to decrease from 0 to 74 min. to 0.21 m is 91.7 hours.

Rate law depicts the rate of a chemical reaction depend on the concentration of the reactant.

The given reaction is second order reaction

Thus, the hours taken for concentration to decrease from 0 to 74 min. to 0.21 m is 91.7 hours.

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Answer: 78.919 amu

Explanation:

If the natural abundance of Br-81 is 49.310%, then the natural abundance of Br-79 must be 100%-49.310%=50.690%

Substituting into the atomic mass formula,

[tex]79.904=(0.49310)(80.9163)+(0.50690)(x)\\79.904=39.89982753+(0.50690)(x)\\40.00417247=(0.50690)(x)\\x=\frac{40.00417247}{0.50690}=\boxed{78.919 \text{ amu}}[/tex]

Answer:

713.96mmhg

Explanation:

p1v1=p2v2

6.10×1.50/9.74

=0.939atm

=0.939*760

=713.96mmhg

The Lewis Structure for ClO.  is attached in the image.

Lewis structure represents the structure of atoms or molecules with their valence electron.

It is a two-dimensional model that helps us to know, how many bond pairs and a lone pair a molecule contains.

Lewis structure of ClO⁻ is very simple to draw as it has only two atoms(chlorine and oxygen), we have to just represent the valence electron around them and complete their octet.

1. Count total valence electron in ClO-

Total number of the valence electrons in chlorine = 7

Total number of the valence electrons in oxygen = 6

Total number of valence electrons  = 7 + 6 + 1 = 14 valence electrons        

[∴one oxygen atom, one chlorine, and one negative charge that count as a one valence electron]

2. Find the least electronegative atom and placed it at center

Connect outer atoms to central atom with a single bond Cl-O bond

Now count the valence electron in the above structure.

Single bond means two-electron , only one single bond is used.

Hence, only 2 valence electrons are used in the above structure from 14 total valence electrons available for drawing the lewis structure of ClO-.

(14 – 2) = 12

We have left with 12 valence electrons more.

3.   Place remaining valence electrons starting from outer atom first

So, put the valence electron around the chlorine and oxygen.

we put 6 electrons around chlorine and oxygen, as each of them already sharing 2 electrons with the help of a single bond between them.

The structure can be seen in the figure attached.

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Answer:

I think I answered this already but I'll put it again:

The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

Answer:

See explanation.

Explanation:

This isn't chemistry. Its physics. Kinetic energy (water) to electric energy (dam) as the hydroelectric dam works. Then, as the current travels from the plant to your crib, electric energy to heat energy (wire resistance). Then when you are using the dryer electric energy to heat energy (hot air) and sound energy (air particles vibrate due to the heat energy).

Answer:

It slow down

It slow down when it passes from the less dense air into the denser glass or water

The temperature of the gas would be 81.2 K

The ideal gas equation is given by:

PV = nRT, where P, V, n, R, and T equals pressure, volume, number of moles, constant, and temperature respectively.

In this case, V = 8L, n = 3 moles, R = 8.317, and P = 2.5 atm or 253.3125 kpa

T = PV/nR = 253.3125 x 8/3 x 8.317 = 2026.5/24.951 = 81.2 K

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The pressure of the carbon dioxide will be 0.09079 atm.

The pressure exerted by the individual gas is known as partial pressure.

The partial pressure is given as

[tex]\rm P_{Total} = P_1 + P_2 + ...[/tex]

In a mixture of carbon dioxide and oxygen, 40.0% of the gas pressure is exerted by oxygen.

If the total pressure is 115 mmHg.

The total pressure in atm will be

P = 115 mmHg

P = 0.15132 atm

We have

[tex]\rm P_T \ \ \ = P_{O_2} + P_{CO_2}\\\\0.15132 \ \ = 0.4 \times 0.15132 +P_{CO_2}\\\\ P_{CO_2} = 0.09079\ atm[/tex]

Then the pressure of the carbon dioxide will be 0.09079 atm.

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Answer:

Temp decreased

Explanation:

If the container is sealed and the pressure DEcreases, then the temperature DEcreased

PV = n RT     n  R   V   are constant   if  P goes down then so does T    

Answer:

6 mol

Explanation:

Discussion

The answer is very nearly six. I will use rounded whole numbers to get the molar mass. Every periodic table is different so you will have to redo my numbers using your periodic table.

The trick is to find 1 mole of CH4 and divide that into 96.

Givens

96.0 grams of CH4

Solution

Find 1 mol of CH4

1 * 1C = 1 * 12 = 12 grams of Carbon in 1 mol of CH4

4 * H = 4 * 1 = 4 grams of Hydrogen in 1 mol of CH4

Total = 16 grams of C and H in 1 mol of CH4

Find 96 grams in mols.

Formula

mol = given mass / molar mass

given mass = 96 grams

molar mass = 16 grams

Mol = 96 / 16

Answer: mol = 6

From the calculation, the age of the sample of carbon - 14 is 9156 years.

The term radioactivity refers to the fact that a substance could disintegrate spontaneously when left alone.

Now, given that;

0.693/t1/2 = 2.303/t log (No/N)

t1/2 = half life

t = age of the sample

No = amount of sample originally present

N = amount of sample present at time t

Hence;

0.693/5730 =  2.303/t  log (9216/3072)

1.2 * 10^-4 =  2.303/t * 0.4771

1.2 * 10^-4 = 1.09876/t

t =  1.09876/1.2 * 10^-4

t = 9156 years

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Among the elements Barium has the lowest Ionization Energy.

The process by which any neutral atom gets converted into electrically charged by gaining or losing electron is called Ionization Process.

K  is an alkali metal  it has to lose one electron to attain stable electronic configuration of an inert gas

For removing second electron , a stable configuration has to be broken and so will require high amount of energy.

Ca and Ba are alkaline earth metals.

They both have to lose 2 electrons to attain  stable electronic configuration of noble gas.

They have low Iow Ionization Energy as compared to K.

Ca has higher  Ionization Energy as compared to Ba because when we move down the periodic table , The ionization energy decreases.

Hence , Among the elements Barium has the lowest Ionization Energy.

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Answer:

A- how long ago a plant or animal lived

In 1867, Otto von Bismarck created the Northern Confederation, a combination of the northernmost German states beneath Prussian rule.

The "Iron Chancellor," Otto von Bismarck (1815–1898), oversaw the unification and modernization of Germany. He virtually ruled Prussia and then all of Germany between 1862 until 1890. To unify the 39 autonomous German states under Prussian control, great strategist Bismarck launched decisive wars with France, Austria, & Denmark.

In 1864, Bismarck began the series of wars that'd make Prussia the most powerful country in Europe. He invaded Denmark to seize control of the German-speaking province of Schleswig-Holstein, and two years later he persuaded Emperor Franz-Josef I to start the Austria- War (1866), which brought about an immediate defeat for the faltering Austrian empire.

Thus, on 1867, Otto von Bismarck created the Northern Confederation, a combination of the northernmost German states beneath Prussian rule.

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The total pressure in the container after the three gases are mixed is 6 atm and the partial pressure of He is 1 atm.

According to Dalton's Law of Partial Pressure , the pressure exerted by a mixture of gas is equal to the sum of the partial pressure of the gases in the mixture.

P(total) = p₁ +p₂+p₃+.....

As the volume of the containers are same and the

n = 1*5/RT for Helium

n = 2*5 /RT for Neon

n= 3*5/RT for Argon

Mole fraction = moles of the element/Total moles

Moles fraction of Helium is

[tex]\rm \dfrac{1*5}{1*5+2*5+3*5}[/tex]

= 1/6

Total Pressure in the container = 1 + 2 +3 = 6 atm

The partial pressure of Helium will be

=Mole fraction * Total pressure

=(1/6)*6 atm

= 1 atm , as the volume is same the temperature is same , the pressure will also be same.

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Answer: 339.84 K

Explanation:

[tex]$$We are given: \\$\mathrm{n}=0.46$ moles \\$V=13.3 \mathrm{~L}$\\$\mathrm{P}=734 \mathrm{~mm} \mathrm{Hg}=0.965 \mathrm{~atm}$\\Putting these values in ideal gas equation we get:\\$0.965$ batm * $13.3 \mathrm{~L}=0.46 \mathrm{~mol} * 0.0821 \frac{\mathrm{atmL}}{\mathrm{molK}} * \mathrm{~T}$\\$\mathrm{T}=\frac{0.965 * 13.3}{0.46 * 0.0821} \mathrm{~K}$$$\mathrm{T}=339.84 \mathrm{~K}$$[/tex]

Answer:

hope this helps and if you have any questions please feel free to ask me any time

The efficiency of the machine which has an energy loss of 10% is 90%

This can be defined as the capacity to achieve a given task with little or no waste. Mathematically, it can be expressed as

Efficiency = (output / input) × 100

We shall assume the following:

Efficiency = (output / input) × 100

Efficiency = (90 / 100) × 100

Efficiency = 90%

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Answer:

four

Explanation:

There is four

CH 4    methane

O2      oxygen

CO2    carbon dioxide

H20    water

Explanation:

the law of conservation of mass

Answer:

Explanation:

the law of conservation of mass

The available energy decreases as one moves upward in an energy pyramid.

The energy pyramid represents a model of how energy is transferred from one trophic level to another in ecosystems.

Energy is transferred from producers to primary consumers, from primary to secondary consumers, from secondary to tertiary consumers, and so on.

Only about 10% of the available energy in one trophic level is transferred to the next with the remaining 90% being lost as heat to the environment.

Thus, as one moves up the energy pyramid, the available energy decreases. This is why organisms at the higher end of the energy pyramid have to devise an efficient way of extracting energy from their foods.

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Answer:

5.7400 × 10⁻⁵

Explanation:

Answer:

Gas tests include:

hydrogen - lighted splint goes out with a squeaky pop.

Explanation:

Answer:

11–350°

Explanation:

Phase change occur in substances when the they change from one state of matter to another due to the addition or removal of heat.

Phase changes refers to the changes that occur in substances in which they change from one state of matter to another due to the addition or removal of heat.

The phase changes that occur in substances are as follows:

Therefore, phase change occur in substances when the they change from one state of matter to another due to the addition or removal of heat.

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Answer:

What kind of industry is cement industry?

The cement industry is one of the main industries necessary for sustainable development. It can be considered the backbone for development. The main pollution source generated from cement industry is the solid waste called cement by-pass dust, which is collected from the bottom of the dust filter.

Explanation:

An advantage of describing a system with a mathematical model is that it enables people to calculate how a change in one variable will affect other variables.

A mathematical model usually describes a system by a set of variables and equations that formed relationships between the variables. Variables examples such as real or integer numbers.

So we can conclude that An advantage of describing a system with a mathematical model is that it enables people to calculate how a change in one variable will affect other variables.

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