Draw the structure or structures produced by the catalytic reduction of the given compound, in which h2 is in excess. Draw hydrogen at a chirality center and use wedge‑and‑dash bonds to designate the stereochemistry, if applicable.

Answer:

20

Explanation:

owls are 10 of anything 10x 2 =20

It seems as though the value of the owl is up to you though

Hopes this helps

Answer:

Solubility is the best to dissolve

The mass, in grams, of 5.90 mol [tex]C_6H_{12[/tex] would be 495.6 grams.

The number of moles in a given amount of substance is the ratio of the mass of the substance and its molar mass.

The statement of the number of moles of substances can be mathematically expressed as follows:

Mole = mass/molar mass

Making molar mass the subject, the equation becomes:

Molar mass = mass/mole

Making mass the subject, the equation becomes:

Mass = mole x molar mass.

In this case, we are looking for the mass of a given mole of  [tex]C_6H_{12[/tex].

C = 12 g/mol

H = 1 g/mol

Molar mass of [tex]C_6H_{12[/tex] = (6x12) + (12x1)

                                   = 72 + 12

                                   = 84 g/mol

Hence:

Mass of 5.90 mol  [tex]C_6H_{12[/tex] = 5.90 x 84

                                         = 495.6 grams

In other words, 5.90 mol of [tex]C_6H_{12[/tex] would be equivalent to 495.6 grams of the compound.

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The value of the mass (B) will be equal to 9 grams and volume (D) will be equal to 5 cm^{3}.

What is density ?

Density is the degree of ways much “stuff” is in a given quantity of space. For example, a block of the heavier detail lead could be denser than the softer, lighter detail gold (Au). A block of Styrofoam is much less dense than a brick. It is described as mass in line with unit volume.

You can consider it, as how tightly or loosely packed a substance is, or how compact it is. Solids are commonly denser than beverages, and beverages denser than gases, however there are numerous exceptions.

Density is a bodily assets of matter, as every detail and compound has a completely unique density related to it. Density described in a qualitative way because the degree of the relative "heaviness" of gadgets with a regular volume.

Copper's Density is nearly equal to 9 and density is equal to mass/volume.

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Hexane is initially employed as the eluting solvent to remove the bibenzyl. The bibenzyl will be eluted first because the nonpolar molecule is particularly soluble in hexane (a nonpolar solvent) .

A mixture in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion. Chemical connections that are challenging to break are created when the components interact with one another. These bonds result in the development of atoms sharing or trading electrons.

Pure components and compounds can be found in nature. A element is formed up of many elements in a predetermined ratio, as opposed to an element, which is a substance comprised of the same sort of atoms.

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The volume of the solution that would result by diluting 0.1M solution to 0.05M is 100ml.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

Hence, if we can write,

Molarity = moles/volume

Moles = molarity x volume

Moles are always constant, so,

initial molarity x initial volume = final molarity x final volume

The initial volume is 50ml and initial molarity is 0.1M, after diluting, the final molarity is 0.05M.

Putting values,

50 x 0.1 = Volume of NaOH after dilution x 0.05

Volume of NaOH after dilution = 100 ml.

So, the volume of the resulting solution after dilution is 100ml.

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Answer:

329.8g of H2O are produced

Explanation:

You have to do stoichiometry to convert grams of isopropyl alcohol to grams of water.

The most valence electron is present in Cl. The fewest valence electrons are present in Ni and Ti. The most unpaired electrons are present in N. The fewest unpaired electrons are present in Cl.

What are valence electrons?

Valence electrons are the electrons present in the outermost shell of an atom that participate in formation of a chemical bond. For example, oxygen atom has total of six valence electrons. out of those 2 electrons are in the 2s subshell and 4 electrons are present in the 2p subshell. So the electronic configuration of oxygen atom can be written as 1s2 2s2 2p4.

Cl has 7 valence electrons in it. Ni and Ti have 2 valence electrons in them which is the least among the following. There are 3 unpaired electrons present in N atom which is the highest among the following atoms and Cl has 1 unpaired electron which is the lowest among the following atoms.

Therefore, the most valence electron is present in Cl. The fewest valence electrons are present in Ni and Ti. The most unpaired electrons are present in N. The fewest unpaired electrons are present in Cl among the following atoms.

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The number of ethanol molecules in the sample are

The molecular mass of ethanol is 45.07 g/mol

Now to calculate the number of molecules of ethanol:

72.75 × (1 mol/46.07)

1.5 moles

Now multiply it with by Avogadro's number which is 6.02 X 10^23 molecules / mole.

1.5  × 6.02 X 10^23

9.03 X 10^23 molecules.

Hence the number of ethanol molecules in the sample 9.03 X 10^23 molecules.

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Answer:

physical change

Explanation:

bcoz we make salad with raw vegetables and fruits

The salad is a physical change.

Making a fruit salad with raw fruits is a physical change because in this process chemical composition of fruits is not changed.

Telling the difference between a chemical change and a physical change seems trickier than it is. The main difference between a chemical change and a physical change is what happens to a substance’s composition. Here are the basic definitions of chemical and physical changes:

chemical change – a process in which chemical bonds are broken or created to make a new substance

physical change – a process in which a substance changes its state of matter, but chemical bonds stay intact

When matter undergoes a chemical change, it can’t return to its original state without additional reactions. But when it undergoes a physical change, it only needs to return to its original state of matter. The molecules of the substance haven’t been changed at all.

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Given that boron has an atomic mass of 10.81 amu, which is closer to 11 than 10, boron-11 is more common. This indicates that boron-11 is more prevalent.

The quantity of protons and neutrons in a specific element's nucleus is known as the atomic mass. This number of electrons in an object's nucleus is often indicated by its atomic number. It is an element's typical weight. The mass of the neutrons and protons can be added to determine the isotopes of an atom in an element.

The term "atomic mass" refers to the weight of a molecule or atom. To determine the average weight of elements and macromolecules as well as to resolve stoichiometry issues, the number of protons is used.

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The heat of combustion for the unknown hydrocarbon when1 mole of an unknown hydrocarbon is burned in a bomb calorimeter and the Calorimeter increases in temperature by 12.19°C is -611.26kJ/mol

A device that is mostly used to measure combustion temperatures. The reaction occurs in a sealed area known as the calorimeter proper, in constant thermal contact with its surroundings (the jacket).

To calculate the heat of combustion we follow the given steps:

Heat released by the combustion =Cp×ΔT=1.929×12.19 kJ=23.51 kJ

Hence, ΔH=−23.51 kJ/g

A unknown hydrocarbon has an empirical formula of CH and a molar mass of 26 g/mol.

So,  ΔH combustion=−23.51×26g /mol=−611.26kJ/mol

Hence, ΔH combustion=−15.6×180 kJ/mol=−611.26kJ/mol

ΔH combustion=−611.26kJ/mol

Hence, the heat of combustion for the unknown hydrocarbon when1 mole of an unknown hydrocarbon is burned in a bomb calorimeter and the Calorimeter increases in temperature by 12.19°C is -611.26kJ/mol

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The concentration of the H2SO4 solution should be 0.1101 M.

Calculation of the concentration:

Since

Volume of H2SO4 = 30.00 mL = 0.030 L

Volume of NaOH= 44.45 mL = 0.04445 L

Concentration of NaOH= 0.1489 M

Now

The balanced equation is

H2SO4 + 2NaOH → Na2SO4 + 2H2O

Now the concentration of the H2SO4 solution is

b*Ca*Va = a*Cb*Vb

here,  b = the coefficient of NaOH = 2

Ca = ?

Va = the volume of H2SO4= 30.0 mL = 0.030 L

a = the coefficient of H2SO4 = 1

Cb = the concentration of NaOH = 0.1489 M

Vb = the volume of NaOH = 44.45 mL = 0.04445 L

Now

2*Ca*0.030 = 1* 0.1489* 0.04445

0.060 * Ca = 0.00661

Ca = 0.1101 M

Hence, The concentration of the H2SO4 solution is 0.1101 M.

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(a) The balanced chemical equation is -

     NaoH + Hcl - Nacl + H2O

(b)  For the pH before addition of NaoH, we need

pH = log [H+]

     = -log [0.5]

     =-(-0.3)

      =0.3

The pH of the solution before addition of NaoH is 0.3

(c) Mole of NaoH = 0.5 x 10 = 5molar

Mole of Hcl = 0.5 x 20 = 10mili molar

Unreacted moles of Hcl = 10 -5 = 5 moles.

          Total volume = 20 +10 = 30 ml

Molarity = 5 moles / 30ml = 0.166

      pH = -log (0.166) = 0.77

(d) Moles of NaoH = 20 X 0.5 = 10 milli molar.

Therefore, Hcl consumed = 10 milli mole.

pH of water = [H+] = 10^-7 molar.

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Answer: True

Explanation: The value of the equilibrium constant indicates whether or not a reaction is favorable. Reactions for which Keq is greater than one are favorable, meaning that the reactants are higher in energy than the products and signifying that energy is released as the reaction proceeds.

For every 800 ml of 0.500 m potassium oxide solution, one gramme of potassium hydroxide is needed.

The following knowledge is necessary to answer the question:

KOH has a molar mass of 56u.

Molarity is defined as Mass of Solute multiplied by 1000 or (Molar mass of Solute divided by mL of Solution).

Given are the values M=0.4 and V=800mL.

The formula yields the following result: 0.5 = Mass of KOH 1000/(56 800).

When it is solved, 8 grammes of KOH are required.

The molar mass of a substance is the weight of one mole of that substance, how many grammes are contained in one mole of a specific chemical is what is meant by the term "molar mass." The atomic masses used to calculate the molar mass are given in the periodic table.

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The volume of required NaOH is 39.6 ml

According to the standard definition, normality is expressed as the number of grams or molar equivalents of solute present in one liter of solution. When we say equivalent, this is the number of moles of reactive moieties in the compound.

Base acidity describes the number of ionizable hydroxide groups in the base. NaOH has an ionizable hydroxide group. Hence, the normality of NaOH is 0.5125 N.

For the given case,

N₁V₁ = N₂V₂

Normality = Molarity × Basicity

For H₂SO₄ the basicity is 2

N₂ = 0.25 × 2

= 0.5 N

For NaOH the acidity is 1

N₁ = 0.505 × 1

= 0.505 N

N₁V₁ = N₂V₂

0.505 × V₁ = 0.5 × 40

V₁ = 39.6 ml

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Considering Dalton's theory 30 grams of Carbon combines with 85 grams of hydrogen.

Daltons theory is based on the law of conservation of mass and also the law of constant composition. The first part of his theory states  that all matter is made up of atoms, and these atoms are indivisible. The second part of this theory says that atoms of a given element are identical in mass and also in properties. But it will be different only in case of different types of molecules present together.

According to Daltons theory if 6 grams of Carbon is reacting with 17 grams of Hydrogen then for 85 grams of Hydrogen the amount of carbon required will be

⇒ 6 × 85  = 30

      17

Therefore 30 grams of Carbon is required to combine with 85 grams of Hydrogen.

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There are [tex]1.77 * 10^{24}[/tex] atoms of sulfur in 60.0 g of aluminum sulfide.

How do you calculate the number of atoms in a gram?

What is the purpose of aluminum sulfide?

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Answer:

There will be the formation of a Common salt (NaCl) and Mg(OH)2 which is a base after the reaction between the two chemicals

They were electrons in an atom's greatest primary energy level, which is occupied. In chemical bonds, they take part.

Atoms in molecules are held together by chemical bonds. Electrostatic forces between negatively charged electrons and positively charged atomic nuclei, whose locations in space are governed by quantum mechanics, give rise to bonds.

One of the most fundamental principles of chemistry, chemical bonding helps to explain other ideas like molecules and reactions. Without it, scientists would be unable to explain why atoms are drawn to one another or how products are created during a chemical process.

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The value calculated by using excess if NaOH by overshooting endpoint  during titration will be not correct.

The value of concentration is supposed to change when excess of NaOH is used. it will be little too high than the correct value. Thus, titration require precise values. Overshooting the endpoint will result in a calculation error for the solution that is being titrated. The calculation for the titrated solution will be off if the moles of titrant are incorrect because the volume of titrant is incorrect because it is higher than it should be.

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the rate at which the entropy of the two reservoirs changes is 0.00390837931 kw/k .

What is entropy ?

Entropy, a measure of a system's thermal energy per unit temperature not available for useful work. Work is obtained from molecular motion, the amount of entropy is a measure of the molecular disorder or randomness of a system. The concept of entropy gives us deep insight into the direction of spontaneous change in many everyday phenomena. Introduced in 1850 by German physicist Rudolf Clausius, it is the pinnacle of 19th-century physics.

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The Equilibrium concentrations :

[XY]  = 0.268 M

[X] = 0.232 M

[Y]  = 0.232 M

Solution:

XY  ⇔ X + Y

0.2 + x                        0.3-x      0.3 - x

Kc  = [X][Y]/[XY]

0.200  = (0.3-x)^2 / 0.2 + x

0.04  + 0.2 x = 0.09  + x^2 - 0.6 x

x^2   - 0.8 x + 0.05 = 0

x   = 0.732  or x = 0.0683

Equilibrium concentrations :

[XY]  = 0.268 M

[X] = 0.232 M

[Y]  = 0.232 M

When both the reactants and products are at concentrations that do not change over time, they are said to be in chemical equilibrium. In this state, the forward reaction rate is equal to the reverse reaction rate. A chemical is said to have equilibrium concentrations when the products and reactants do not change with time.

In other words, chemical equilibrium or equilibrium concentration is the state in which the rate of the forward reaction in a chemical reaction equals the rate of the reverse reaction. Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. All extract and product concentrations are constant at equilibrium.

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When 5.86 moles of NaN3(Sodium Azide) is given then no. of moles of Na produced is 5.86 mol.

The inorganic substance with the formula NaN3 is sodium azide. The gas-forming element in older automotive airbag systems is this colourless salt. It is utilised to make additional azide chemicals. It is an ionic chemical that is exceedingly water soluble and extremely dangerous.

Na is the chemical formula used for the element having atomic number 11 and called as Sodium

Acc. to the given data following is the reaction occurring

2NaN3→2Na+3N2

Now to calculate the no. of moles of  Na

Multiply the given moles of sodium azide(NaN3) by the mole ratio between NaN3 and N2 from the balanced equation, with Na in the numerator. 2 mol Na:3 mol N2

5.86 molNaN3×2mol Na/2mol NaN3=5.86 mol Na

Hence, when 5.86 moles of NaN3(Sodium Azide) is given then no. of moles of Na produced is 5.86 mol.

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Wavelength is chosen by analyzing the spectrogram.

Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.

A spectrogram gives a going for walks show of a sound signal because it takes place in real time, a spectrum, however, offers us a photograph of the sound at a particular factor in time. A spectrum can permit you to see.

Spectrograms map out sound in a comparable way to a musical rating, only mapping frequency rather than musical notes. Seeing frequency energy allotted over the years in this manner allows us to genuinely distinguish each of the sound factors in a recording, and their harmonic shape.

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There are 14 valence electrons assigned to the n atom.as it forms  NH4CL lewis structure.

Lewis structure can be explained the bonding pair from the lone pair electrons.it shows non bonding electrons.hydrogen atom form one covalent bond.cl is anionic monoatomic ligand. H is a diatomic anionic ligand. Nitrogen is the least electronegative atom goes at the center.Hydrogen atoms always go on the outside of lewis structure.

In this, N has 5 valence electron.Hydrogen has 1 and cl has 7 valence electron.that gives total 14 valence electrons.cl has 3 lone pairs and n has a lone pair..

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