combustion of glucose () is the main source of energy for animal cells: one of the most important uses to which this energy is put is the assembly of proteins out of amino acid building blocks. the gibbs free energy of formation of one peptide bond, joining one amino acid to another, is . suppose some cells are assembling a certain protein made of amino acids. (note that the number of peptide bonds in the protein will be one less than the number of amino acids.) calculate the maximum moles of this protein that can be assembled if of glucose are available for combustion. round your answer to significant digits.

It is common practice to remove impurities from the reconstituted product by rinsing the solids obtained from the reconstituted with a small volume of cold solvent used in the process. Here option B is the correct answer.

The common practice of rinsing the solids obtained from recrystallization with a small quantity of the cold solvent used in the procedure serves to remove any residual impurities from the recrystallized product.

This is done by dissolving any residual impurities present in the crystals, which are then removed along with the solvent through filtration. The small quantity of cold solvent used is not enough to dissolve any of the pure crystals, so the recrystallized product remains pure.

Rinsing also helps to remove any residual solvent present in the crystals, which could affect the yield and purity of the product. In summary, the rinsing step is necessary to ensure that the recrystallized product is pure and free from any residual impurities or solvents that could affect its properties or intended use.

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Complete question:

Why is it common practice to rinse the solids obtained from the recrystallization with a small quantity of the cold solvent used in the procedure?

A) To increase the yield of the recrystallized product

B) To remove impurities from the recrystallized product

C) To remove residual solvent from the recrystallized product

D) To reduce the size of the crystals in the recrystallized product

E) To prevent the crystals from drying out and losing their purity

A small amount of heat Q flows from a system A at high temperature (350K) to a system B at low temperature (250K). If Q = 0. 5 J, mA = 1. 2 kg, and mB = 0. 6 kg, the total entropy change of the system be 0.00057J/K.

Firstly we will be taking Q as a positive number,

Then, the entropy lost by A is Q/TA

= (-0.5 J)/(350 K)

= -1/700 J/K

= -0.00143 J/K.

Now, the entropy gain by B is Q/TB

= (0.5 J)/(250 K)

= 1/500 J/K

= +0.00200 J/K.

Therefore, the total entropy change of the system will be the the sum of entropy lost by A and entropy gain by B.

Hence the total entropy would be =0.00057 J/K.

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Answer:

In other words, the hot dog buns limit the number of complete hot dogs we can produce. ... The amount of a product that is formed when the limiting reactant is fully ... the limiting reactant and calculate the theoretical yield for an actual chemical reaction. ... Method 1: For the first method, we'll determine the limiting reactant by ...

Explanation:

Regarding the limiting reagent, it is true that:

Which of the following is true of a limiting reagent?

Regarding the limiting reagent, it is true that:

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Answer:

A. in the cells of autotrophs

Explanation:

Photosynthesis takes place in the cells of autotrophs. Autotrophs are capable of manufacturing their own food by two major means which is by photosynthesis or by chemosynthesis.

Heterotrophs on the other hand depends on the food manufactured by the autotrophs for their nourishment

Answer:

Warming it would make it come out. On a cold day the honey is frozen and atoms will not move as fast and are close toghether. When you warm it the atoms will move faster and the honey will come out of the bottle

Explanation:

Answer:

The amount of glue used, the material and how much of it you're using every time you test each glue, the temperature of the room, etc.

Explanation:

There are many answers to this question but think about the obvious ones first. Obviously you'll need to use the same amount of glue every time you're testing each type. The material used is also important and how much of the material you're using because different types of glue can work better with different materials, as well as how much material you're using. The temperature of the room can affect how well each glue holds up because often glue dries easier/quicker with heat, so in your experiment to make it fair you need to make sure that each glue is tested in the same environment.  

Answer:

Y

ou have learnt in your previous classes that the sour and bitter

tastes of food are due to acids and bases, respectively, present in them.

If someone in the family is suffering from a problem of acidity after

overeating, which of the following would you suggest as a remedy– lemon

juice, vinegar or baking soda solution?

n Which property did you think of while choosing the remedy?

Surely you must have used your knowledge about the ability of

acids and bases to nullify each other’s effect.

n Recall how we tested sour and bitter substances without tasting

them.

You already know that acids are sour in taste and change the colour

of blue litmus to red, whereas, bases are bitter and change the colour of

the red litmus to blue. Litmus is a natural indicator, turmeric is another

such indicator. Have you noticed that a stain of curry on a white cloth

becomes reddish-brown when soap, which is basic in nature, is scrubbed

on it? It turns yellow again when the cloth is washed with plenty of

water. You can also use synthetic indicators such as methyl orange and

phenolphthalein to test for acids and bases.

In this Chapter, we will study the reactions of acids and bases, how

acids and bases cancel out each other’s effects and many more interesting

things that we use and see in our day-to-day life. Do You Know?

Litmus solution is a purple dye, which is extracted from lichen, a plant belonging to

the division Thallophyta, and is commonly used as an indicator. When the litmus

solution is neither acidic nor basic, its colour is purple. There are many other natural

materials like red cabbage leaves, turmeric, coloured petals of some flowers such as

Hydrangea, Petunia and Geranium, which indicate the presence of acid or base in a

solution. These are called acid-base indicators or sometimes simply indicators.

2021–22

18 Science

2.1 UNDERSTANDING THE CHEMICAL PROPERTIES OF

ACIDS AND BASES

2.1.1 Acids and Bases in the Laboratory

Activity 2.1

These indicators tell us whether a substance is acidic or basic by

change in colour. There are some substances whose odour changes in

acidic or basic media. These are called olfactory indicators. Let us try

out some of these indicators.

Explanation:

The  things like magic, astrology and psychic predictions not considered science as it only consider on the proves given by the experiments and the theory not on the random predictions.

The science, any universe of source of knowledge that deals with the physical and chemical  world and its processes and that deals with the observations and experimentation with conclusion and results.

The magic is about the secret tricks done by magician and astrology is the observing the space and universe all above the earth and psychic deals with the human psychology.

Therefore, things like magic, astrology and psychic predictions not considered science as it only consider on the proves given by the experiments and the theory not on the random predictions.

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Answer:

the mass of naoh is 40and nacl is 80

Answer:

The Answer would be D. N2O3

Explanation:

the Chemical bond is a Covalent bond to which the prefixes are Di and tri

Answer: the answer is the reaction in a cold pack

Explanation: since endothermic means the absorption of heat

Answer:

Explanation:

What does it mean by are represented by is it like cells when things can a cell molecule?

When two monosaccharide units react via their hydroxyl (OH) functional groups, a disaccharide is formed. The linkage between the monosaccharide units in a disaccharide is known as a glycosidic linkage.

The glycosidic linkage is a covalent bond that joins the two monosaccharide units together. It is formed through a dehydration or condensation reaction, where the hydroxyl group from one monosaccharide combines with the hydrogen atom from the other monosaccharide, resulting in the formation of a water molecule. The remaining oxygen atom from each monosaccharide forms the glycosidic bond.

The specific type of glycosidic linkage depends on the orientation of the hydroxyl groups involved in the reaction. Common types of glycosidic linkages include alpha and beta linkages. In an alpha linkage, the hydroxyl group involved in the reaction is positioned below the plane of the ring, while in a beta linkage, the hydroxyl group is positioned above the plane of the ring.

The type and position of the glycosidic linkage in a disaccharide determine its properties and functionality. Different disaccharides, such as sucrose, lactose, and maltose, have distinct glycosidic linkages, resulting in their unique structures and functions.


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The age of the moon rock is roughly 11.8 billion years.

The age of the moon rock can be estimated using the half-life of the radioactive substance. The half-life of a radioactive substance is the amount of time it takes for half of the original amount of the substance to decay. In this case, the half-life is 1.5 billion years.

To determine the age of the moon rock, we can use the concept of exponential decay. Exponential decay is a mathematical term that describes the rate at which a substance decays over time. Since the rock contains 1/8 of the original amount of the radioactive substance, we can use this information to estimate the age of the rock.

Assuming that the original amount of the radioactive substance has decayed exponentially over time, we can determine the age of the rock using the following equation:

\(Age =\frac{ (Half-life *ln(\frac{1}{8})) }{ ln(2)}\)

Plugging in the given information, we get:

\(Age = \frac{(1.5\ billion\ years\ * \ ln(\frac{1}{8})) }{ ln(2)}\)

Solving for Age, we get:

Age = 11.8 billion years

Therefore, the moon rock is estimated to be 11.8 billion years old.

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Water molecules consist of two hydrogen atoms covalently bonded to one oxygen atom, resulting in a bent molecular structure with polar properties.

Water (H₂O) is a molecule composed of two hydrogen atoms (H) covalently bonded to one oxygen atom (O). The arrangement of these atoms gives water a bent molecular structure. The oxygen atom is more electronegative than the hydrogen atoms, causing the electrons to spend more time around the oxygen atom, creating a partial negative charge (δ-) on the oxygen atom and partial positive charges (δ+) on the hydrogen atoms.

This polarity of water molecules allows them to form hydrogen bonds with neighboring water molecules. The δ- oxygen atom of one water molecule attracts the δ+ hydrogen atoms of nearby water molecules, resulting in a network of hydrogen bonds. These hydrogen bonds give water unique properties such as high boiling and melting points, high specific heat capacity, and strong cohesion and adhesion abilities.

Water's polarity also enables it to dissolve a wide range of solutes, making it an excellent solvent. It can dissolve polar substances like salts, sugars, and some acids, as well as other polar solvents. This property is essential for many biological processes since water is the medium in which most biochemical reactions occur.

In summary, water molecules consist of two hydrogen atoms bonded to one oxygen atom, resulting in a bent molecular structure with polar properties. The polarity of water allows for the formation of hydrogen bonds, giving water its unique physical and chemical properties.

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A graph enables you to easily denote the relationship between variables as positive or negative.

This question is incomplete but I will try to help you as much as I can. A graph is one of the numerous was of data representation in science. A graph has two axes; the vertical ( Y - axis) and the horizontal (X - axis).

A graph enables you to easily denote the relationship between variables as positive or negative. A graph is sometimes called a scatter plot.

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Explanation:

We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.

a) Carbon-14:

By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.

atomic number = n° of protons

mass number = n° of protons + n° of neutrons

n° of protons = atomic number

n° of neutrons = mass number - n° of protons

n° of neutrons = mass number - atomic number

If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.

In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.

n° of protons = atomic number = 6

n° of protons = 6

n° of neutrons = mass number - atomic number = 14 - 6

n° of neutrons = 8

b) Cobalt-60:

atomic number = 27 (from the periodic table)

mass number = 60

n° of protons = atomic number = 27

n° of protons = 27

n° of neutrons = mass number - atomic number = 60 - 27

n° of neutrons = 33

c) Gold-197:

atomic number = 79 (from the periodic table)

mass number = 197

n° of protons = atomic number = 79

n° of protons = 79

n° of neutrons = mass number - atomic number = 197 - 79

n° of neutrons = 118

d) Uranium-235:

atomic number = 92 (from the periodic table)

mass number = 235

n° of protons = atomic number = 92

n° of protons = 92

n° of neutrons = mass number - atomic number = 235 - 92

n° of neutrons = 143

Answer:

a) Carbon-14: n° of protons = 6 n° of neutrons = 8

b) Cobalt-60: n° of protons = 27 n° of neutrons = 33

c) Gold-197: n° of protons = 79 n° of neutrons = 118

d) Uranium-235: n° of protons = 92 n° of neutrons = 143

The secretion of acids, buffers, enzymes, and water aids in the breakdown of food.

The food moves through the gastrointestinal tract and breaks down into smaller particles for energy, cell repair, and growth.

Digestion begins when eating and chewing food with the help of teeth in the mouth, then it goes down to the small intestine.

While moving through the gastrointestinal tract it mixes with juices, buffers, acids, enzymes, and water which disintegrates the large molecules of food into smaller ones and makes it suitable for assimilation and absorption in the body.

To put it simply, the secretion of acids and acidic juices is responsible for food digestion.

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Carbon dioxide would be absorbed by the water, lowering air pressure, resulting in evaporation or freezing of the water.

The early atmosphere of Mars and its early, universal magnetic field both had a direct and indirect impact on the presence of liquid water on the planet. The atmosphere of Mars was much thicker than it is now about 4 billion years ago. And there was a lot more carbon dioxide in there (and other gases). A greenhouse gas called carbon dioxide contributes to the planet's warming. According to two researchers from Caltech's Jet Propulsion Laboratory, a sizable store of carbon dioxide trapped in the soil of Mars may be responsible for the apparent abrupt shifts in the red planet's temperature over billions of years.

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Answer:

To test if a lipid is saturated or unsaturated iodine is added. If the iodine changes from brown to clear the lipid is unsaturated. If the iodine does not change colors the lipid is saturated. To test for the degree of lipid saturation iodine is added to the unsaturated lipid.

Explanation:

Answer:

The ice shrinks (decreases volume) and becomes more dense. The ice density will increase from . 92g/cm^3 to that of liquid water (1g/cm^3).

Explanation:

Answer:

14g of N2 is required to react with 16g of O2

Explanation:

Element sodium (Na) has an atomic number of 11

mass number = 23

proton = 11

electron = 11

Neutron = mass number - atomic number

= 23 - 11

= 12

Answer:

metal and nonmetal it always include

Answer:

she use granulated sugar with fine grains as it is easily dissolved so she used in lemonade.

Answer:Particles in plasmas collide more often.

Plasma particles have high kinetic energy (they move quickly).

Plasma particles are far apart.

The ionized particles have no fixed volume

Explanation:

Plasma is the fourth form of matter which has freely moving electrons in it. The substance can be identified as plasma if its particles collide often and are far apart.

Plasma is a type of matter other than solids, liquids, and gas. They have similar properties to that of gas. Plasma particle collides are often like gases as they move freely in space. Like gases that have no definite shape and volume.

The plasma particles have ionic charges, positive and negative resulting in high kinetic energy. This property allows them to show electromagnetism and electrical conductivity.

The ionized particles are due to the high temperature that allows them to have the property of electrical conductivity and compression.

Therefore, the particles of plasma are ionized and have high kinetic energy.

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The correct option that is most likely pseudoscience is C. A salesman describes how sickness is caused when your body’s energy is not flowing properly and his wristbands help balance your energies.

Pseudoscience is that practice in which it is presented as if it were scientific but is not compatible with the scientific method since it uses vague and contradictory statements.  They are going to be based more on beliefs that are usually of mystical origin, they are occultists. They are not governed either by general laws but are more particular cases.

These practices are usually unreliable as they are not substantiated by any official scientific status.

Therefore, we can confirm that the correct option that is most likely pseudoscience is C. A salesman describes how sickness is caused when your body’s energy is not flowing properly and his wristbands help balance your energies.

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