identify the type of change (physical or chemical) that occurs when an iron bar rusts and when a substance freezes. use complete sentences to justify the type of change that occurs.

The reaction used in reverse of glycolysis for gluconeogenesis. The three irreversible reactions are catalyzed by : hexokinase, phosphofructokinase-1, pyruvate kinase.

Option E is correct .

Most of the time, this is because gluconeogenesis needs to avoid the energy-saving and irreversible steps of glycolysis. In gluconeogenesis, these three irreversible steps cannot be reversed directly due to their exergonic nature.

Pyruvate is produced by the reactions of glycolysis on glucose 6-phosphate. The whole interaction is cytosolic. Fructose 6-phosphate is produced by the reversible isomerization of glucose 6-phosphate. The physiologically irreversible phosphorylation of fructose 6-phosphate to shape fructose 1,6-bisphosphate is catalyzed by phosphofructokinase.

Incomplete question :

Seven of the ten reactions of glycolysis are reversible (DG near zero) and can be used in reverse of glycolysis for gluconeogenesis. The three irreversible reactions are catalyzed by:


A. hexokinase, phosphoglycerate kinase, pyruvate kinase.


B.  triose phosphate isomerase, phosphoglycerate mutase, pyruvate kinase.


C.  enolase, phosphoglycerate kinase, phosphofructokinase-1.


D.  hexokinase, phosphoglucoisomerase, glyceraldehyde-3-phosphate dehydrogenase.


E.  hexokinase, phosphofructokinase-1, pyruvate kinase.

Learn more about glycolysis :

brainly.com/question/30461189

#SPJ4

Answer:

atomic nucleus :)

Explanation:

Answer:

the forces i think

Explanation:

The absorption of a free moving neutron by the atoms nucleus

(A P E X)

Explanation:

Hydrogen bonds with carbon 4 times, carbon bonds with itself once, and oxygen bonds with itself 3 times.

Energy of reactants:

E = 4 * 413 + 347 + 3 * 495

= 3484kJ/mol

Answer:

Energy transferred in = 3484kJ/mol

Answer:

Magnesium (Mg) is able to bond with one oxygen (O) atom. The formula of the compound is MgO. You can see in the dot structure that the two atoms share four different electrons. When a bond is made with four electrons, it is called a double bond. I think...

The 0.13 grams of ko2(s) is needed to remove the co2 from a lungful of air at stp according to the following reaction is a lungful of air (500 ml) contains 4.1% co2 by volume.

Read more about moles:

https://brainly.com/question/24191825

#SPJ4

Answer:

The Best Answer would be B but the correct answer is A+B --> AB

Explanation:

Answer:

3.5*10^23

Explanation:

divide 45/molar mass

then multiple the answer to Avogadro's number

Answer:

10/13 × 6.022×10²³

Explanation:

ans: given mass / molar mass = number of moles

(M ).

number of moles(M) = number of molecules / avagadro number ...

=molar mass of NaCl = 58.5 gram

45/58.5 × 6.022 ×10²³

= 10/13 × 6.022 × 10²³ is the required number

Answer:

9.9966788 x 10^-1

NAD+ and FAD are not macromolecules themselves but are actually coenzymes that are involved in various biochemical reactions within cells.

What is Macromolecule?

A macromolecule is a large and complex molecule made up of many repeating subunits, also called monomers, that are joined together by covalent bonds. Macromolecules are typically found in living organisms and play important roles in many biological processes.

The four main classes of macromolecules found in living organisms are:

Proteins: Made up of long chains of amino acids, proteins have a wide range of functions in cells, including enzymes that catalyze chemical reactions, structural components, and signaling molecules.

Nucleic acids: These include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), which are made up of long chains of nucleotides. Nucleic acids store and transmit genetic information and play a critical role in protein synthesis.

Carbohydrates: These include sugars, starches, and cellulose, which are made up of long chains of simple sugar molecules (monosaccharides). Carbohydrates serve as a source of energy and also play a structural role in cells.

Lipids: These are a diverse group of molecules that are not soluble in water, including fats, oils, and waxes. Lipids serve as a source of energy and are important components of cell membranes.

NAD+ (nicotinamide adenine dinucleotide) and FAD (flavin adenine dinucleotide) are both derived from vitamins and are essential for many metabolic processes, including cellular respiration and energy production.

Coenzymes like NAD+ and FAD are not considered macromolecules because they are not large, complex molecules formed from repeating subunits, which is a defining characteristic of macromolecules like proteins, nucleic acids, and carbohydrates.

Learn more about Macromolecules from given link

https://brainly.com/question/5246898

#SPJ1

To find the rate constant for a first-order reaction, we can use the equation:

ln([A]0/[A]t) = kt

where [A]0 is the initial concentration of A, [A]t is the concentration of A at time t, k is the rate constant, and ln is the natural logarithm.

Using the data given, we can calculate the rate constant as follows:

ln(1.60/0.40) = k(10.0 s)
ln(0.40/0.10) = k(20.0 s)

Simplifying these equations, we get:

k = (ln(1.60/0.40))/10.0 s
k = (ln(0.40/0.10))/20.0 s

Calculating these values, we get:

k = 0.231 s^-1 (rounded to three significant figures)

Therefore, the rate constant for this reaction is 0.231 s^-1.

TO KNOW MORE ABOUT rate constant for a first-order CLICK THIS LINK -

brainly.com/question/30828263

#SPJ11

Answer:

9.77x10⁻³M HCl

Explanation:

Assuming the solution of AgNO₃ is in excess:

Based on the chemical equation:

AgNO₃ + HCl → AgCl + HNO₃

We must find the moles of AgCl that will be produced. With the moles and knowing 1 mole of AgCl is produced from 1 mole of HCl we can find the moles of HCl and its concentration as follows:

Moles AgCl -Molar mass: 143.32g/mol-:

0.7g AgCl * (1mol / 143.32g) = 4.88x10⁻³moles AgCl = Moles HCl

As the volume of the solution is 500cm³ = 0.500L, the concentration of HCl is:

4.88x10⁻³moles HCl / 0.500L =

When you burned the chip, The original source of energy conversions was chemical energy. Which then converted to light, thermal, sound, and kinetic energy.

Answer:

In a chemical equilibrium, the forward and reverse reactions occur at equal rates, and the concentrations of products and reactants remain constant. A catalyst speeds up the rate of a chemical reaction, but has no effect upon the equilibrium position for that reaction.

Explanation:

Answer:

The formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄

Explanation:

Iron (ii) ions, Fe²⁺ have a positive charge of +2. Chromate ions, CrO₄²⁻, on the other hand have a positive charge of -2. When iron (ii) ions and chromate ions combine two form a compound, each ion will contribute a mole of ion towards the formation of the compound. This is in line with the idea that a compound carries no charge. The positive charge (+2) of the iron (ii) ions are balanced by the negative charge of the chromate ions as shown mathematically as follows;

+2 + (-2) = 0; i.e. Fe²⁺ + CrO₄²⁻ = FeCrO₄

Therefore, the formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄

The formula formed by the compound by Iron ii ions and chromate ions will be FeCrO₄

Iron (ii) ions \(\rm Fe^{2+}\) have a positive charge of +2. Chromate ions, \(\rm CrO_3^{2-}\)  on the other hand, have a positive charge of -2.

When iron (ii) ions and chromate ions combine to form a compound, each ion will contribute a mole of ion towards the formation of the compound.

This is in line with the idea that a compound carries no charge. The positive charge of the iron (ii) ions 2+ are balanced by the negative charge of the chromate ions -2 as shown mathematically as follows;

\(\rm +2+(-2)=0\)

\(\rm Fe^{2+} +CcrO_4^{2-}=FeCrO_4\)  

Thus the formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄

To know more about Chemical compounds follow

https://brainly.com/question/26487468

Answer:

Explanation:

It's water vapor. There is enough heat present to get the water to boil but not enough to break it into its chemical components (oxygen and hydrogen), so the answer is D.

The zinc blende structure is a face-centered cubic unit cell containing four Zn^2+ ions, four S^2- ions, and four ZnS units.

The zinc blende (ZnS) structure is a face-centered cubic (fcc) unit cell. In this structure, there are:
1. Four Zn^2+ ions in one cubic unit cell. They are located at the corners and the center of each face of the cube.
2. Four S^2- ions in one cubic unit cell. They occupy the alternate tetrahedral sites within the cell.
3. Four ZnS units in one cubic unit cell, as there are equal numbers of Zn^2+ and S^2- ions, and each ZnS unit consists of one Zn^2+ ion and one S^2- ion.
So, the zinc blende structure is a face-centered cubic unit cell containing four Zn^2+ ions, four S^2- ions, and four ZnS units.

learn more about zinc blende Refer: https://brainly.com/question/28295226

#SPJ11

If it approaches the boundary at an incident angle of 46 ∘ and the angle of refraction is 35 ∘ , the speed in the second medium is 3.77 × 10⁸ m/s.

When a light ray enters a new medium from another medium, it bends. This bending of light is referred to as refraction, and the speed of light in that medium determines the degree to which it bends.

The speed of light in air is approximately 3.0 x 10^8 m/s. When light enters a denser medium such as water, it slows down and bends toward the normal. When it enters a less dense medium such as air, it speeds up and bends away from the normal

Therefore, the speed in the second medium is equal to:

v2 = v1 * sin i1 / sin i2

where v1 is the speed of light in the first medium, sin i1 is the sine of the angle of incidence, and sin i2 is the sine of the angle of refraction.

The angle of incidence and the angle of refraction are related by Snell's law:

sin i1 / sin i2 = v1 / v2

Given that the incident angle is 46° and the angle of refraction is 35°.

Therefore,

sin i1 = sin 46° = 0.7193

sin i2 = sin 35° = 0.5736

By Snell's Law:

sin i1 / sin i2 = v1 / v2

v2 = v1 * sin i1 / sin i2

v2 = (3.0 × 10⁸ m/s) × (0.7193 / 0.5736

v2 = 3.77 × 10⁸ m/s

Learn more about refraction at:

https://brainly.com/question/31846193

#SPJ11

Answer:

D.

Explanation:

The electron cloud has negligible mass. Most mass come from the nucleus.

Answer:No of moles of potassium sulfide (K2S)=0.61671moles

Explanation:

No of moles is given as   Mass/ molar mass

Here Mass of potassium sulfide (K2S) =68 grams

Molar mass of potassium sulfide (K2S)  = 39.0983 x 2 + 32.065 =110.2616 g/mol

No of moles =68 grams /110.2616 g/mol

=0.61671moles

Molecules absorb photons of infrared (IR) electromagnetic radiation through a process known as vibrational absorption or vibrational excitation.

Molecules have specific vibrational modes, which correspond to the different ways in which the atoms within the molecule can vibrate with respect to one another. When a molecule absorbs a photon of IR radiation, it can undergo a change in vibrational energy. The energy of the absorbed photon matches the difference in energy between two vibrational states of the molecule, causing it to vibrate more vigorously and increase its temperature.

The energy required to excite a molecule from one vibrational state to another depends on the mass of the atoms within the molecule and the strength of the bond between them. Different molecules have different vibrational modes and absorb different wavelengths of IR radiation, which can be used to identify and characterize them.

This process of IR absorption is widely used in analytical chemistry, such as in infrared spectroscopy, which is a common analytical technique used to identify and quantify the chemical composition of a sample based on the specific vibrational modes of its constituent molecules.

Learn more about electromagnetic radiation here:

https://brainly.com/question/13934832

#SPJ11

Option B: voluntary muscles are the muscles which have complete control and are responsible for all kinds of movements.

Animals' muscles are the types of tissue that cause movement or motion. Voluntary refers to action taken of one's own free will or will. All of the muscles that are linked to the skeleton are voluntary muscles, hence these muscles are also referred to as skeletal muscles or striated muscles because of the way their muscle fibres give them a striated, or stripy, appearance. This, therefore, tells us that option B is he right choice.

The only muscles that can be actively manipulated are those in the skeleton. Since the muscles are connected to the bones, pulling on them moves the bones. Skeletal muscles are used for every conscious movement a person makes.

To know more about skeletal muscles, refer to the following link:

https://brainly.com/question/12252128

#SPJ4

To raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is 5.434×10¹ kJ.

For a substance, it's specific heat capacity is the amount of energy required to raise the temperature of unit mass of that substance by 1°C.

If, specific heat capacity (c) = 4.18 J/ g°C

Mass of the substance (m) = 250.0 g

Change in temperature (ΔT) = 52°C

Energy (Q) = ?

Then mathematically the relation could be represented as

  c = \(\frac{Q}{ \ m \ (\Delta\ T )}\)

Therefore,  \(Q = m\times c \times (\Delta\ T)\)

                   \(Q = 250 \times 4.18 \times 52\)

                   \(Q = 54,340 J\\Q = 5.434 \times 10^1 kJ\)  

So, to raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is  5.434×10¹ kJ.

To know more on specific heat capacity, click on

https://brainly.com/question/27991746

#SPJ2

Using 45.0 mL of water instead of 30.0 mL can make a difference depending on the specific situation.

For example, if the question is related to a chemical reaction or a solution preparation, the amount of water used can affect the concentration and properties of the resulting solution.

Using more water can result in a more dilute solution, which can affect the reaction rate, yield, and other properties.

In contrast, if the question is related to a physical measurement or a calculation, such as determining the density of a substance or the mass of a solution, the amount of water used may not have a significant impact as long as the measurement is consistent and accurate.

Therefore, it is important to consider the specific context and purpose of the question when determining whether using 45.0 mL of water instead of 30.0 mL will make a difference.

To learn more about water refer here:

https://brainly.com/question/28465561#

#SPJ11

A hollow tube that is filled with particles coated with stationary phase material is called a "column" in chromatography.

The column is an essential component of chromatographic systems, such as gas chromatography (GC) and liquid chromatography (LC).

The particles coated with stationary phase material provide the surface for the separation and interaction of the sample components, allowing for their separation based on various properties such as polarity, size, or affinity.

To know more about stationary phase refer here

https://brainly.com/question/48376248#

#SPJ11

4.56g excess reactant is left over when 17.0 g of potassium hydroxide (KOH) reacts with 20.0 g of iron (III) nitrate (Fe(NO₃)₃)

Reactants are raw materials that react with one another and form products.

Here given balanced reaction is

2KOH + Fe(NO₃)₂ → Fe(OH)₂ + 2KNO₃

Then we have to calculated the masses of KOH and Fe(NO₃)₂ from the balanced reaction

Molar mass of KOH = 39+16+1 = 56g/mol

Mass of KOH = 2×56 = 112g

And the molar mass of Fe(NO₃)₂ = 56+2[14+(16×3)]

= 56+2[14 + 48)]

= 56+2[62]

= 56+124

= 180g/mol

Then from the balanced equation

112g of KOH and 180g/mol of  Fe(NO₃)₂

Then the 17 g of KOH = 17×180/112g

= 27.32 g of Fe(NO₃)₂

Then for 20.0 g of iron (III) nitrate

Therefore Xg of KOH = 112×20/180

Xg of KOH = 12.44g

Thus 12.44g of KOH reacted

Therefore we have determine the leftover mass of the excess reactant

Mass of KOH leftover = ?

Mass of KOH leftover = (Mass of KOH given) – (Mass of KOH that reacted)

Mass of KOH leftover = 17 - 12.44g

Mass of KOH leftover = 4.56g

Know more about potassium hydroxide

https://brainly.com/question/20592733

#SPJ1

The major side effect of ingesting activated charcoal is called as  black stools, option D.

Chemicals can be captured in the pores of activated charcoal. In order to treat some toxins that have been ingested, it is normally administered orally. For additional purposes, the evidence is scant.

Peat, coal, wood, coconut shells, or petroleum can all be used to make charcoal. Charcoal is heated in the presence of a gas to create activated charcoal. The charcoal develops many interior pores as a result of this process. Activated charcoal may trap pollutants thanks to its pores.

To treat poisoning, activated charcoal is frequently employed. Additionally, it is claimed to treat excessive cholesterol, hangovers, and upset stomach, although the majority of these applications lack solid scientific backing.

Learn more about Activated charcoal:

https://brainly.com/question/31065779

#SPJ4

The major side effect of ingesting activated charcoal is d) black stools.

While some individuals may experience mild abdominal discomfort, vomiting, or headaches, these side effects are generally less common and less severe. However, it is important to note that activated charcoal should only be consumed under the guidance of a healthcare professional, as it can interact with certain medications and may not be effective for all types of poisoning or overdose. The major side effect of ingesting activated charcoal is d) black stools.  it's crucial to remember that activated charcoal should only be ingested with a doctor's supervision because it may mix with some medications and isn't always helpful for treating poisoning or overdose. Black stools are the main adverse impact of consuming activated charcoal.

To learn more about charcoal  click here

brainly.com/question/17443858

#SPJ11

Answer:

Save Fuel, Save Earth

Fuel and time wait for none!

Be wise, don’t waste fuel

Save fuel, stop being cruel

Don’t contribute towards global warming

Care for future, save fuel

Hope That Helps!!!

Explanation:

Here are Best Slogans on Save Fuel.

-Towards a better future.

-Save to sustain.

-Save fuel for a better world.

-Make sure to keep some for the next generation.

-Our resources are limited.

-Save to expand.

-Saving fuel has no alternatives.

-Save money while saving fuels.