Comparative investigations do not require a hypothesis.
OA. True
OB. False

Although lipids hold the majority of the body's energy reserves, glycogen is the body's primary energy source.

Glucose is a polymer that makes up glycogen. Our body's primary source of energy is carbs. The remaining glucose in the body is turned into glycogen and stored in various places, but the majority of our body's energy reserves are found in fats, which are kept in the form of lipids.

Where does the energy come from in the muscles?

The chemical energy that is stored in our meals is used by muscles to produce heat and motion energy (kinetic energy). Energy is necessary for maintaining body temperature, promoting physical activity, and enabling tissue growth and repair. Foods high in protein, fat, and carbohydrates provide energy.

What Takes Place to Muscles in the Absence of Glucose?

Your body converts carbs, such as those found in bread or fruit, into glucose after consumption. Glycogen is the form of glucose that is stored in your muscles and liver and is used for energy when you are not eating or while you are exercising.

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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

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:

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The factor that can reduce the required number of kWh for heating is the lower use of the electrical equipment that is option C.

The electrical power is defined as the amount of energy that a device is capable of transfering per unit time.

The electrical power is usually measured in kilowatts per hour. That is KWh.

To determine the total amount of power consumed by an electrical device is to multiple the power use (in kilowatts, kW) by the number of hours during which the power is consumed.

But when there is reduction in the use of the electrical device, the amount of power consumed reduces.

Therefore, to reduce the amount of required number of power consumed (kWh) for heating, the number of times the electrical device is being used should be reduced.

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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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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.

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.

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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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 .

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

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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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).

Answer:

51 mph

Explanation:

Answer:

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

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

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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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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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.

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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Answer:

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

Explanation:

ANSWER

The number of moles of aluminum chloride is 1.533 moles

STEP-BY-STEP EXPLANATION:

Given information

Number of moles of Magnesium chloride = 2.3 moles

The next thing is to write the balanced equation of the reaction

From the balanced chemical reaction equation, you will see that 3 moles of Magnesium chloride react with 2 moles of aluminum to produce 3 moles of magnesium and 2 moles of aluminum chloride.

The next step is to find the number of moles of aluminum chloride in the reaction using a stoichiometry ratio.

Let x represents the number of moles of aluminum chloride

From the chemical reaction equation,

3 moles of magnesium chloride give 2 moles of aluminum chloride

2. 3 moles of magnesium will give x moles of aluminum chloride

The above statement can be translated below as

Since x represents the number of moles of aluminum chloride, therefore, the number of moles of aluminum chloride is 1.533 moles

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

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

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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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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Answer: They form molecules

Explanation:

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

The complete diagram is attached.

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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Correct ratio of dntps (deoxyribonucleotides) to ddntps (dideoxyribonucletides) is Adding more dNTPs than ddNTPs

The triphosphates of nucleosides that contain deoxyribose are known as deoxynucleotide triphosphates (dNTPs). They lose two phosphate groups as they are integrated into DNA during replication, making them the fundamental units of DNA. When a DNA primer is hybridized to a complementary DNA template, DNA polymerases expand the hybrid by using dNTPs. The developing strand's 3′-hydroxyl terminus and the entering dNTP's -phosphate produce a phosphodiester link as the proper dNTP is integrated into it. A DNA molecule is made up of nucleotides called dNTPs. The Sanger sequencing process makes use of nucleotides called ddNTPs. Structure. is made comprised of a 3'OH group in the deoxyribose sugar. During PCR, the DNA polymerase first elongates the sequencing primer, which then hybridizes the PCR products.

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Answer

Part A:

Given equation:

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:

Part B:

Given equation:

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:

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

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:

Step 3: Determine the grams of Cholesterol.

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

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

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.

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

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

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

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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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 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.

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.

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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