Name AND calculate the molar mass of the following compounds:

AI(CN)3

Answers

Answer 1

The name of the given compound is aluminum cyanide . and the molecular mass of the compound Al(CN)3 is 104.98g .

What is aluminum cyanide ?

A metallic cyanide is aluminum cyanide. Al(CN)3 is the chemical formula. By reacting aluminum metal and mercuric cyanide in liquid ammonia, aluminum cyanide was created as an ammoniate. Water breaks down aluminum cyanide to produce aluminum hydroxide.

What is molecular mass ?

The mass of a given molecule is its molecular mass (m), which is expressed in daltons (Da or u). Because they contain various isotopes of an element, multiple molecules of the same substance can have distinct molecular weights. According to IUPAC, the related quantity relative molecular mass is a unitless comparison between the mass of a molecule and the unified atomic mass unit (also called the dalton). The molar mass is unrelated to, but distinct from, the molecular mass and relative molecular mass. The molar mass, which is stated in g/mol, is defined as the mass of a specific material divided by the amount of a substance. As a result, the molar mass represents the average of several molecules or particles.

Molecular mass of Al(CN)3 = 26.98 + 3×12 + 3×14 = 104.98g

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Related Questions

Answer the questions based on the diagram.

How many electrons are in the n = 1 shell?

How many electrons are in the n = 2 shell?

How many electrons are needed to complete fluorine's outer shell?

How many electrons are being shared between the two fluorine atoms?

How many bonds exist between the two fluorine atoms?

Answers

The correct solution to the task above according to the diagram is given below:

(a) There are 2 electrons in the n = 1 shell(b) There are 7 electrons in the n = 2 shell(c) The number of electrons needed to complete fluorine's outer shell is 1(d) Two electrons are being shared between two different fluorine atoms.(e) The number of bonds which exist between the two fluorine atoms is 1, a single bond.

The complete diagram is attached.

What is meant by n = 1 shell?

The n = 1 shell simply refers to first shell in the electron orbit of an atom; specifically, shell k. The maximum number of electrons which shell k or n = 1 can accommodate or take is just 2.

So therefore, it can be deduced from above that the shell k is the same as n = 1 .

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1. How many grams of glucose would you need to make up 1000cm³ of 0.5 Mol/dm³?

2.Your science teacher only requires 50cm³ of 1.5 Mol glucose soulution. How much glucose will you need to weigh out to dissolve into 50cm³?

3. The solution you have made in question 2 is called your 100% solution. How much glucose would you need to weigh out to make a 10cm³ 40% solution?

Answers

1. Grams of glucose would you need to make up 1000cm³ of 0.5 Mol/dm³ is 2000 gram

2.Glucose will you need to weigh out to dissolve into 50cm³ is 1.5cm³

3.Glucose would you need to weigh out to make a 10cm³ 40% solution is 0.225 cm³

Gram is the unit mass and glucose is the main type of sugar in the blood and is the major source of energy for the body cells

1. Here given data is glucose = 000cm³ of 0.5 Mol/dm³

We have to find gram of glucose = mass of solute/formula mass of solute

Gram of glucose = 1000/0.5

Gram of glucose = 2000 gram

2. Here given data is 50cm³of 1.5 mol glucose solution

We have to find glucose will you need to weigh out to dissolve into 50cm³ =?

So, M₁ = 50cm³  V₁ = 1.5 Mol M₂ = 50cm³ V₂ =?

M₁V₁ = M₂V₂

V₂ = M₁V₁/M₂

V₂ = 50cm³×1.5 Mol /50cm³

V₂ = 1.5cm³

Glucose will you need to weigh out to dissolve  is 1.5cm³

3.The solution you have made in question 2 is called your 100% solution and we have to find glucose would you need to weigh out to make a 10cm³ 40% solution =?

So, M₁V₁ = M₂V₂ = M₃V₃

M₁ = 50cm³  V₁ = 1.5 Mol M₂ = 50cm³ V₂ =  1.5cm³  M₃= 10cm³ V₃ = ?

V₃ = M₁V₁×M₂V₂/M₃V₃

V₃ =  50cm³ × 1.5 Mol/50cm³×1.5cm³/10cm³

V₃ = 0.225 cm³

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1. A gas has a Volume of 10 L and a temp of 200 K. If the volume increases to 20 L, what is the new temp?

Answers

For this question we can use the formula provided from Charles's Law, which is:

V1/T1 = V2/T2

We have:

V1 = 10 Liters

T1 = 200 K

V2 = 20 L

T2 = ?

Now we add the values to the formula:

10/200 = 20/T2

0.05 = 20/T2

T2 = 400 K

What quantity in moles of Li₂S will be required to completely react with 45.0 mL of 0.100 M Fe(NO₃)₃?
3 Li₂S(aq) + 2 Fe(NO₃)₃(aq) → Fe₂S₃(s) + 6 LiNO₃(aq)

Answers

Moles of Li₂S will be required to completely react with 45.0 mL of 0.100 M Fe(NO₃)₃ is 0.00675 moles.

The reaction is as follows :

3 Li₂S(aq) + 2 Fe(NO₃)₃(aq) → Fe₂S₃(s)  + 6 LiNO₃(aq)

Molarity = mol / V in L

Molarity = 0.100 M

Volume = 45.0 mL = 0.045 L

now , putting the values in formula :

M = mol / V

mol = M × V

moles = 0.100 × 0.045

moles = 0.0045 moles of Fe(NO₃)₃

from the equation it is clear that :

2 moles of Fe(NO₃)₃ react with 3 moles of  Li₂S

therefore, 0.0045 moles of Fe(NO₃)₃ react with = (3 × 0.0045 ) / 2

                                                                               = 0.00675 moles of Li₂S

Thus, Moles of Li₂S will be required to completely react with 45.0 mL of 0.100 M Fe(NO₃)₃ is 0.00675 moles.

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Why does zinc only form a 2+ ion?

Answers

Hii there!

Zinc can only create +2 positive charged cation particles due to its capacity to lose/shed two electrons in its furthest shell's 4s subshell, coming about in an uncovered zinc particle with the electronic arrangement.

Answer:

this is almost true based on its electronic structure zinc only forms  a 2+ ion

Explanation:

Complete and balance each of the following equations. If no reaction occurs, enter NOREACTION.

Answers

Answer

Part A:

Given equation:

[tex]KI_{(aq)}+BaS_{(aq)}\rightarrow[/tex]

The above equation is an example of a double replacement reaction. A double replacement (or double displacement) reaction is a reaction in which the positive and negative ions of two ionic compounds exchange.

Note: The oxidation number of:

K = +1

I = -1

Ba = +2

S = -2

So, the complete chemical equation including phases of the given reaction is:

[tex]2KI_{(aq)}+BaS_{(aq)}\rightarrow BaI_{2(aq)}+K_2S_{(s)}[/tex]

Part B:

Given equation:

[tex]KCl_{(aq)}+CaS_{(aq)}\rightarrow[/tex]

Also, the equation is an example of a double replacement reaction.

Note: The oxidation number of:

K = +1

Cl = -1

Ca = +2

S = -2

The complete chemical equation including phases of the given reaction is:

[tex]2KCl_{(aq)}+CaS_{(aq)}\rightarrow K_2S_{(s)}+CaCl_{2(aq)}[/tex]

Which of these forces are acting within a nucleus? Check all that apply

Answers

The forces that are acting within a nucleus is electrostatic forces of attraction.

What is electrostatic forces?

Electrostatic forces can be described as the non-contact force and these forces can be seen as one that involves the pulling or pushing on objects without touching them.

It should be noted that the force can be generated through the activities that involves the Rubbing of some materials together  and a a result of this the charge can be gotten.

In conclusion,  the nucleus which can be described as the membrane-enclosed organelle  that i been found in the cell of the organism  that help to support live in the organism and it do contains the chromosomes, however in this nucleus the content is been held together as a result of the electrostatic forces of attraction and this attraction help the elements which are the biological element to function very well in the nucleus of the cell.

Therefore, second option is correct.

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Check the missing options:

strong nuclear force

electrostatic forces of attraction

electrostatic forces of repulsion

Burning 1000.00 grams of glucose (C6H12o6) will produce how much carbon dioxide in grams

Answers

This is a stoichiometry problem, where we have an initial amount of reactant and we need to find out how much of the product will we end up with, in order to do that we need to:

1. Set up the properly balanced equation,

C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O

2. See how many moles of reactant there are in the given amount of grams, we have 1000 grams, the molar mass of glucose is 180.16g/mol

180.16g = 1 mol

1000g = x moles

180.16x = 1000

x = 1000/180.16

x = 5.55 moles of glucose in 1000 grams

3. Check the molar ratio between the two compounds, as we can see from the balanced equation, the molar ratio is 1:6, 1 mole of glucose to produce 6 moles of CO2, therefore if we have 5.55 moles of glucose:

1 C6H12O6 = 6 CO2

5.55 C6H12O6 = x CO2

x = 33.3 moles of CO2

4. Calculate how many grams will be equal to the number of moles that we found out, the number of moles is 33.3 moles, and the molar mass of CO2 is 44.01g/mol

44.01g = 1 mol

x grams = 33.3 moles of CO2

x = 33.3 * 44.01

x = 1465.5 grams of CO2 are produced

Calculate the internal energy change, ΔrU, for the combustion of 29.3 g of vitamin C (C6H8O6, molar mass = 176.124 g mol-1) if the combustion inside a bomb calorimeter, Ccal = 8.31 kJ °C-1, causes a temperature change from 21.5 °C to 68.3 °C.

Answers

The internal energy change, ΔrU, for the combustion of 29.3 g of vitamin C (C6H8O6, molar mass is given as

-2.33810^3 kJ/mal

This is further explained below.

What is internal energy change,?

Generally, The total of heat transmitted and work performed represents the change in the internal energy of a system. The change in the system's internal energy plus the PV work completed equals the heat flow.

Given

Mass of Vitamin C=29.3g

Molar mass of Vitamin C=176.124g/mol

C cal =8.31 KJJ^0

[tex]\Delta T &=68.3-21.5[/tex]

=46.8^0

Bomb Calorimeter is a fixed volume, [tex]\Delta u=q+\omega=q[/tex]

hence, heat generated by a reaction, denoted by released, equals heat generated by a calorimeter, denoted by again.

qreleased=-gained

[tex]=-C_{\text {cal }} \Delta T \\[/tex]

Where

q= heat

T is temp

=-8.31* 468^o

=-388.908KJ

[tex]$\begin{aligned} \text { No. of moles of Vitamin } C &=\frac{29.3 \mathrm{~g}}{176.124 \mathrm{~g} / \mathrm{mol}} \\ &=0.1663 \mathrm{moles} \end{aligned}$[/tex]

No. of moles of Vitamin [tex]=\frac{29.3 \mathrm{~g}}{176.124 \mathrm{~g} / \mathrm{mol}}[/tex]

=0.1663moles

On combustion of 29* 3 =0.1663  moles of Vitamin C,

[tex]$\Delta u[/tex]=-388.908KJs

Therefore Permole of Vitamin C,

[tex]\Delta u=\frac{-388.908}{0.1663}[/tex]

=-2338.592

=-2.338 *10^3  KJ/mal

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energy being released like when fireworks are set off are an example of physical or chemical change

Answers

Answer:

A chemical change

When 38.0 mL of 0.1250 M H2SO4 is added to 100 mL of a solution of PbI2, a
precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and
weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the
concentration of iodide ions in the original solution?

Answers

The concentration of the iodide ions is obtained as 4.75 * 10^-4 M.

What is the concentration of iodide ions in the original solution?

We know that the concentration has to do with the amount of substance that is in the solution. In this case, we have been told that n 38.0 mL of 0.1250 M sulfuric acid is added to 100 mL of a solution of lead II iodide a lead II sulfate precipitate is formed and when filtered we obtain 0.0471 g of the filtrate and we want to find the concentration of the iodide ions in the original solution.

We must look to the balanced reaction equation as well as the stoichiometry of the reaction as we know it in this case.

Number of moles = volume * concentration of solution

Number of moles of sulfuric acid = 38/1000 L *  0.1250 M

= 4.75 * 10^-5 moles

Now we know that the reaction is 1:1 so;

Number of moles = volume * concentration of solution

concentration of solution = Number of moles/ volume

= 4.75 * 10^-5 moles/100 * 10^-3 L

= 4.75 * 10^-4 M

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A. Calculate the number of atoms in 1.15 × 10−6 moles of helium.
B. Calculate the number of moles of helium that contains 4.77 × 1021 atoms.

Answers

A. The number of atoms in  1.15×10⁻⁶ moles of helium is 6.92645×10¹⁷.

B. The number of moles of helium that contains 4.77×10²¹ atoms is 7.9196×10⁻³ moles.

according to the definition of Avogadro's Number.

Avogadro's Number

Avogadro's Number is called the number of particles (usually atoms or molecules) that exist in one mole of any substance. Its value is 6.023×10²³ particles per mole.

Number of atoms of helium

You can apply the following rule of three: If 1 mole contains 6.023×10²³ atoms of helium, 1.15×10⁻⁶ moles of helium contains how many atoms?

amount of atoms of atoms= (1.15×10⁻⁶ moles× 6.023×10²³ atoms)÷ 1 mole

amount of atoms of atoms= 6.92645×10¹⁷ moles

Then, there is 6.92645×10¹⁷ atoms.

Number of moles of helium

You can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of helium, then 4.77×10²¹ atoms are contained in how many moles of helium

amount of moles of helium= (4.77×10²¹ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of helium= 7.9196×10⁻³ moles

Finally, there is 7.9196×10⁻³ moles.

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What does the absorption spectrum of an atom show?OA. The amount of energy that is absorbed as the element changesphaseB. The temperature of the phase transitions of the element atdifferent pressuresC. The wavelengths of light that an atom gives off when electrons falback to lower energy levelsOD. The wavelengths of light that cause the electrons in the atom tomove to higher energy levels

Answers

The absorption spectrum of an atom is widely used to determine specific elements in different places, like different planets for example, and as the name suggests, this spectrum is the opposite of the emission spectrum and it is related to the absorption of energy in form of light. Therefore the best explanation for absorption spectrum is the electron moving to a higher energy level, since it is absorbing energy. Letter D is the best option, since letter c

what is change in velocity from the time he begin pushing to when he stops pushing

Answers

Acceleration is the change in velocity from the time he starts pushing to when he stops.

What is the definition of velocity?

Velocity narrates how position changes, acceleration relates to how velocity changes. We can use this formula to answer velocity for the acceleration of the table Aston pushes a table across the floor with a force of 6 N. Assume the table has a mass of 6 kg and he pushes the table for 2 seconds. they may source of motion; they may also slow, stop, or velocity changes the path of an object at a time, and the forces can push or pull in any direction.

So we can conclude that At end velocity, the speed is not changing. If the speed is not changing, there is no force on the stage on the falling object or the forces acting on it are in.

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7a. What will the triangle H value be if 2 moles of solid carbon react with oxygen?

Answers

Solid carbon fuels having a high energy density in volume include coal and biomass. They are widely dispersed throughout the entire world. They are currently the main energy sources used in traditional thermal power plants to produce electricity.

What is Triangle H value ?

A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of its pressure and volume. It is a state function that is frequently employed in measurements of chemical, biological, and physical systems at constant pressure, which the sizable surrounding environment conveniently provides.

It is employed to figure out how much heat a chemical reaction produces. In calorimetry, heat flow is measured using the change in enthalpy. It is measured to assess a Joule-Thomson expansion or throttling process. To determine the minimum power required for a compressor, enthalpy is employed.

What is Solid carbon ?

The goal of Solid Carbon is to securely and permanently store carbon dioxide (CO2) in rocks. Direct CO2 extraction from the atmosphere or ocean is the goal.

Injection of carbon dioxide causes gas bubbles to rise up like champagne bubbles from the liquid metal. The gas molecule splits up into flakes of solid carbon in a matter of nanoseconds as the bubbles pass through the liquid metal.

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How does the atomic radius change going down and across the periodic table? (1 point)

Answers

Answer:

Larger atomic radius as you go down a column.

Smaller atomic radius as you go across a period.

Explanation:

Going down the periodic table, the atomic radius increases because each new period adds a new energy level/electron shell. New orbitals must be added outside of the pre-existing orbitals, expanding the atomic radius. For instance, the third period introduces the third energy level (3s) versus the fifth period which introduces the fifth energy level (5s).

Going across the periodic table, the atomic radius decreases because the number of protons within the nuclei increases. When there are more positively-charged protons, they have a greater pull on the negatively-charged electrons, thus brining them closer to the nucleus and shrinking the atomic radius. For instance, the atomic radius of chlorine (17 protons) is smaller than the atomic radius of the elements which lie to its left, such as phosphorus (15 protons) and sulfur (16 protons).

Lesson 8 Chemical Compounds
Write an expository essay and explain the following essential content points.
*The difference between ionic, covalent, and metallic bonds
*how electrons are involved in each type of bond

Answers

The difference between ionic, covalent and metallic bonds are

Ionic bond is formed by the transfer of valence electron from one atom to another. It is also called as electrovalent bond. example given as follows

 Na⁺   +   Cl⁻    ---->   NaCl

Covalent bond is formed when two atoms share their valence electron or we can say that by mutual sharing of one or more electrons between atoms.

H   +     H   ---->   H₂

Metallic bond is formed when collective sharing of valence electrons between several positively charged metal ions in metal lattice.

the images are attached at the end related to ionic bond , covalent bond and metallic bond.

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How many moles of each element are present in CH4?

Answers

To calculate the moles of each element in methane:

We will use the avogadros number.

For C:

1 mole = 6.022x10^23 atoms

in CH4 there is only 1 carbon.

Which is 1 x 6.022x10^23 atoms = 1 mole

There is 1 moles of carbon.

For H:

For hydrogen its 4 x 6.022x10^23 atoms = 4 moles

therefore there are 4 moles of hydrogen.

A 2.85 g sample of an unknown gas at 73 ∘C and 1.00 atm is stored in a 2.75 L flask. What is the density of the gas?

Answers

The density of the unknown gas would be 0.0010 g/[tex]cm^3[/tex].

Density

The density of a substance is a property that measures the level of compactness of the substance. The density of a substance is the ratio of the mass of the substance and its volume.

The density of a substance can be mathematically expressed as:

Density = mass in g/volume in  [tex]cm^3[/tex].

In this case, the volume of the gas is given as 2.75 L while the mass is given as 2.85 g.

2.75 L of gas is equivalent to: 2.75 x 1000

                                             = 2750 [tex]cm^3[/tex]

Thus, the density of the gas = 2.85/2750

                                        = 0.0010 g/[tex]cm^3[/tex]

In other words, the 2.95 g sample of an unknown gas stored in a 2.75 L flask will have a density of 0.0010 g/[tex]cm^3[/tex].

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The concentration of cholesterol (C27H46O) in normal blood is approximately 0.005 M.How many grams of cholesterol are in 610 mL of blood?Express your answer to one significant figure and include the appropriate units

Answers

Answer

The grams of cholesterol in 610 mL of blood to one significant figure = 1.0 g

Explanation

Given:

The concentration of cholesterol (C27H46O) in normal blood = 0.005 M

The volume of blood = 610 mL = 0.610 L

What to find:

The grams of cholesterol in 610 mL of blood.

Step-by-step solution:

Step 1: Determine the moles of cholesterol.

The number of moles of cholesterol in the blood can be calculated using the molarity formula, which is

[tex]\begin{gathered} Molarity=\frac{Moles}{Volume\text{ }in\text{ }L} \\ \\ Moles=Molarity\times Volume\text{ }in\text{ }L \\ \\ Moles=0.005\text{ }M\times0.610\text{ }L \\ \\ Moles=3.05\times10^{-3}\text{ }mol \end{gathered}[/tex]

Step 2: Calculate the molar mass of cholesterol.

Using the atomic masses of (H = 1.00784, C = 12.011, O = 15.999) from the periodic table, the molar mass of cholesterol is calculated as follows:

[tex]\begin{gathered} C_{27}H_{46}O=(27\times12.011)+(46\times1.00784)+15.999 \\ \\ C_{27}H_{46}O=324.297+46.36064+15.999 \\ \\ C_{27}H_{46}O=386.68\text{ }g\text{/}mol \end{gathered}[/tex]

Step 3: Determine the grams of Cholesterol.

The grams of cholesterol in 610 mL of blood will be:

[tex]\begin{gathered} Mass=Moles\times Molar\text{ }mass \\ \\ Mass=3.05\times10^{-3}\text{ }mol\times386.68\text{ }g\text{/}mol \\ \\ Mass=1.179\text{ }grams\approx1.0\text{ }gram \end{gathered}[/tex]

Hence, the grams of cholesterol in 610 mL of blood to one significant figure is 1.0 g.

About 33% of the hair's strength is due to the millions of what bonds in its
structure?

Answers

Hair is made of proteins called keratin. The protein structure includes ionic bonds, hydrogen bonds and disulfide bonds and these make the hair strong.

What is hair protein?

Hair is made of a protein called keratin. Proteins are biomolecules made of large number of amino acids.

Proteins make the body strong since it plays an essential structural function. There are  different types of proteins which are made of different number of amino acids and have different structures.

The bonds in proteins are mainly disulfide bonds, hydrogen bonds and ionic as well as covalent bonds. These bonds make the protein chain well adhered and strong.

In keratin protein, the structure is twisted and helical alpha structure with hydrogen bonds, ionic bonds and disulphide bonds which therefore, make the hair strong.

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what happens when the mass of an atom is different than the one on the periodic table.

Answers

Answer: They form molecules

Explanation:

atoms of the same chemical element dont always have the same mass because alothiugh the number of protons in the nucleus is the same for all atoms of the same element, the number of nuetrons is not.
why does the atomic mass of an atom sometimes not match the number on the periodic table?
atoms with the same number of protons, but different numbers of neutrons are called isotopes. Because the number of neutrons can vary for a given element. The mass numbers of different atoms of an element may also very, for example helium atoms have three neutrons instead of two.

Given that Fe (iron) has a specific heat capacity
of 0.4490 J/g.°C, what is the heat energy (in J)
needed to raise the temperature of a 30.00 g Fe
cube from 40.0 °C to 100.0 °C?

Answers

808.2J heat energy needed to raise the temperature of a 30g Fe cube from 40°C to 100°C .

Given,

Fe (iron) has a specific heat capacity

= c = 0.4490 J/g°C

mass of iron = m = 30g

initial temperature = T1 = 40°C

final temperature = T2 = 100°C

thus, temperature change = ∆T = (100-40 )°C= 60°C

According to the formula of heat energy(Q) ,

Q = mc∆T

Q = 30g × 0.449J/g°C × 60°C = 808.2 J

Hence, 808.2J heat energy needed to raise the temperature of a 30g Fe cube from 40°C to 100°C .

What is Specific heat capacity ?

The amount of energy needed to raise a material's heat content by precisely 1°C per gramme is known as specific heat, or Csp.

mathematically,

c = Q /m×∆T

Where

Q = quantity of heat absorbed by a body

m = mass of the body

∆t = Rise in temperature

C = Specific heat capacity of a substance depends on the nature of the material of the substance.

S.I unit of specific heat is J kg-1 K-1

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3. (5) The essential amino acid phenylalanine (Figure 3) is present in NutraSweet®. First, fill
in the missing lone pairs in the figure. Next, identify the molecular geometry and the
approximate bond angles at the 5 designated atoms; summarize this information in a table
below the figure.

Answers

Amino and carboxylic acid functional groups can both be found in organic compounds known as amino acids. Of the many different amino acids found in nature, alpha-amino acids, which are the building blocks of proteins, are by far the most important.

In PKU patients, phenylalanine can result in intellectual impairments, brain damage, seizures, and other issues. Milk, eggs, and meat are just a few examples of protein-rich foods that naturally contain phenylalanine. Phenylalanine-containing supplements are also on sale.

The chemical formula of phenylalanine, an essential - amino acid, is C 9H 11NO 2. It can be thought of as either a phenyl group in lieu of the terminal hydrogen of alanine or a benzyl group in place of the methyl group of alanine.

An amino acid called alanine, sometimes known as -alanine, is essential for the formation of proteins. The center carbon atom, which also carries a methyl group side chain, is connected to an amine group and a carboxylic acid group, respectively.

The amino acid alanine is necessary for the synthesis of proteins. Vitamin B-6 and tryptophan are broken down using it. It provides the central nervous system and muscles with energy. It helps the body use glucose and boosts the immune system.

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Particle X has 16 protons, 17 neutrons and 18 electrons. Particle X
a. an atom of a metal
b. an atom of a noble gas
c. an anion
d. a cation

Answers

Particle X has 16 protons, 17 neutrons and 18 electrons. Particle X will be an anion.

As we know that for an atom the atomic number is equal to the number of protons and the number of electrons present in that atom.

And for this given atom, the number of protons are 16 while the number of electrons are 18. This is only possible when the atom has gained some electrons which made it an anion.

Anions are ions that are negatively charged. Ions are charged atoms or molecules. If a balanced atom gains one or more electrons, it will become a negatively charged anion.

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Reduction can be described as:A. the gain of electrons.B. None of theseC. the gain of an OH group.D. the loss of an OH group.

Answers

Answer

A. the gain of electrons.

Explanation

Oxidation and reduction are complementary reactions. Oxidation is the process involving with loss of electrons or an increase in oxidation state by a molecule, atom, or ion while reduction is the process of gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.

Hence, the correct answer to your question is option A. the gain of electrons.


What is the average speed of a car that traveled 300.0 miles in 5.5 hours?

Answers

Answer:

51 mph

Explanation:

Calculate the number of grams of solute in 1.000 L of 0.943 M potassium iodate

Answers

The number of grams of solute in 1.000 L of 0.943 M potassium iodate is  201.803g

0.943M means, 1L contains 0.943 moles KIO3.

Amount in g = no of moles× molar mass.

Molar mass of KIO3 = 214 g/mol.

So, mass of KIO3 present= 214×0.943 g = 201.803g

What are solute?

A substance  dissolved in a solution is called a solute.  In liquid solutions, the amount of solvent  is greater than the amount of solute. One of the best examples of a solute in our daily activities is salt and water. Salt dissolves in water and therefore salt is a solute.

The major types of solute are:

GaseousLiquidSolid

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Refer to the octet rule to decipher which of the following is an exception (carbon dioxide, phosphorous triflouride, arsenic pentaflouride, ammonia, or water) and which of the following is also an exception (boron trichlouride, borohydride, and borazine.

Answers

Answer:

[tex]\begin{gathered} (i_)\text{ Arsenic Pentafluoride} \\ (ii)\text{ Borohydride} \end{gathered}[/tex]

Explanation:

a) Here, we want to get the molecule that does not obey the octet rule

The correct choice here is arsenic pentafluoride.

Arsenic has 5 valence electrons, then it takes in one each from each of the fluorine atoms. This brings a total of 10 which is more than the 8 stipulated in the octet rule.

The octet rule states that the central atom should have a maximum of 8 electrons

b) Here, we want to get an exception to the octet rule

The correct answer choice here is borohydride. Borohydride has a total of 10 electrons (5 from Boron, 4 from hydrogen (1 from each) and an extra 1)) does not follow or obey the octet rule

Consider the reaction. 2Al(s)+Fe2O3(s)−→−heatAl2O3(s)+2Fe(l) If 20.4 kg Al reacts with an excess of Fe2O3, how many kilograms of Al2O3 will be produced?

Answers

Considering the reaction. 2Al(s)+Fe2O3(s)−→−heatAl2O3(s)+2Fe(l) the noles of  Al₂O₃. will be produced 49.31 kilograms of Al₂O₃.

What is the chemical reaction?

Generally, the equation for the chemical reaction is mathematically given as

[tex]$$2 \mathrm{Al}(\mathrm{s})+\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s}) \rightarrow \text { heat }+\mathrm{Al}_2 \mathrm{O}_3(\mathrm{~s})+2 \mathrm{Fe} \text { (l) (1) }$$[/tex]

To find the mass of [tex]$\mathrm{Al}_2 \mathrm{O}_3$[/tex] produced, we need to find the number of moles of Al since it is the limiting reactant Fe_2 O_9 is in excess).

[tex]n_{A l}=\frac{m_{A l}}{A_{A i}} \quad \text { (2) }[/tex]

Where:

m_{{Al: }} is the mass of Al [tex]$=26.1 \mathrm{~kg}=26100 \mathrm{~g}$[/tex]

A_{A l} is the atomic mass of [tex]$\mathrm{Al}=26.982 \mathrm{~g} / \mathrm{mol}$[/tex]

The number of moles of Al

[tex]n_{A l}=\frac{m_{A l}}{A_{A l}}=\frac{26100 g}{26.982 g / m d i}=967.31$ moles[/tex]

Two moles of aluminum react with one mole of iron oxide to generate one mole of aluminum oxide (Al2O3), as shown in Equation (1).

[tex]$n_{\mathrm{Al}_2 \mathrm{O}_3}=\frac{1 \text { mol } \mathrm{Al}_2 \mathrm{O}_3}{2 \text { moles } \mathrm{Al}} * 967.31$ moles $\mathrm{Al}=483.66$ moles[/tex]

Finally, the mass of Al_2 O_3 in kilograms is:

[tex]m=n_{A l_2 \mathrm{O}_3} * M M \\\\=483.66 \mathrm{moles} * 101.96 \mathrm{~g} / \mathrm{mol} \\\\=49313.5 \mathrm{~g}\\\\=49.31 \mathrm{~kg}$$[/tex]

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