12. all reactions that work to hydrolyze large biochemical substances into smaller subcomponents is referred to as

Answer:

down

Explanation:

Answer

(a) F

Pole Star is a star in the galaxy and hence not a part of the solar system.

(b) T

Mercury is the smallest planet in the solar system and Jupiter is the largest planet in the solar system.

(c) T

Uranus is the farthest planet to the sun in the solar system and Mercury is the closest planet to the earth in the solar system.

(d) T

INSAT or Indian National Satellite System is a series of artificial Indian satellites used for telecommunications, meteorology and search and rescue operations.

(e) F

There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Note the pluto is considered as a dwarf planet.

(f) F

Orion can be seen with naked eyes. It is one of the most magnificent constellations in the sky. It has seven or eight bright stars. Orion is also called the Hunter

In this exercise, we have to use our knowledge of astronomy to identify the correct alternatives, so we find that:

1)C

2)B

3)A

4)B

5)D

6)C

Then, based on astronomy knowledge, we can identify that the true alternatives correspond to:

1)A meteor happen a streak of light above bring into being by a meteor superlative through Earth's general feeling or mood.

2)Meteoroids exist lumps of rock or iron that revolution the brightest star, just as celestial body orbiting a star, asteroids, and comets act.

3)A coma happen the fuzzy-anticipate glow that maybe visualize situated on sides the head of a comet.

4)Halley's Comet, that happen 8 kilometres (5 miles) expansive and 16 km long, travels around the Sun each 75 to 76 age in an lengthened circuit.

5)Shooting stars exist existent what astronomers call meteors. Most meteors upset fashionable the gases around the earth before they reach the ground.

6)The celestial body orbiting a star belt happen a torus-form domain in the Solar System, situated about middle from two points the orbits of the celestial body orbiting a star Jupiter and Mars.

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Answer:the second largest one

Explanation:

both weels are pushing at it

Answer:

0.0162 moles (3 s. f.)

Explanation:

moles = mass / Ar

moles = 3.2 / 197.0

moles = 0.0162436

moles = 0.0162 (3 s. f.)

Answer: the statement issues are addressed by the people working together is true about activation.

Explanation:

Answer:

0.157689 moles

Explanation:

Answer:

59 Sc 0

21

tiene numero atomico 21, porque es neutro, y tiene numero masico 59 porque 21 + 28 =59

Option E is Answer. The pH value of the buffer is 9.08

The pH of a solution: It is a measure of hydrogen ion concentration, which in turn is a measure of its own acidity. Pure water dissociates slightly into equal concentrations of hydrogen and hydroxyl (OH−) ions.

The pH is then calculated using the expression:

pH = - log [OH-].-------------(1)

the pH of acidic buffer =pka+log[ acid/salt]

the pH of basic buffer =pkb+log[ base/salt]

Given that Kb=1.8x10^-5

                 base=0.27M

                 salt=0.18M

first, we have to calculate the value of kb,

pkb=−log[1.8×10 ^−5]

pkb=4.74

The pH of buffer=pkb+log[base/salt]-------------(2)

We find out the value of kb and now substitute it in equation(2)

pOH=4.74+log[ 0.27/0.18]

​=4.74−0.176=4.92

pH=14−4.92=9.08

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When balancing the skeleton half-reaction NO₂⁻ → NO₃⁻ in basic solution, the other species that appear on the right side of the equation, in addition to NO₃⁻, are 2H₂O + 2e⁻.

To balance the half-reaction NO₂⁻ → NO₃⁻ in basic solution, we need to ensure that the number of atoms and charges are balanced on both sides of the equation.

1. Start with the unbalanced equation: NO₂⁻ → NO₃⁻.

2. Balance the oxygen atoms by adding H₂O molecules to the side deficient in oxygen. In this case, we add one H₂O to the left side: NO₂⁻ + H₂O → NO₃⁻.

3. Balance the hydrogen atoms by adding H⁺ ions to the side deficient in hydrogen. In this case, we add two H⁺ ions to the left side: NO₂⁻ + H₂O + 2H⁺ → NO₃⁻.

4. Balance the charges by adding electrons (e⁻). In this case, we add two electrons to the left side: NO₂⁻ + H₂O + 2H⁺ + 2e⁻ → NO₃⁻.

5. Check the elements and charges on both sides to ensure they are balanced. In this balanced equation, the species on the right side, in addition to NO₃⁻, are 2H₂O + 2e⁻.

Therefore, when the half-reaction NO₂⁻ → NO₃⁻ is balanced in basic solution, the other species on the right side of the equation, in addition to NO₃⁻, are 2H₂O + 2e⁻.

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The main minerals that may contribute to hypertension when consumed in excess include sodium, potassium, and calcium.

Eating too much of certain minerals can lead to hypertension, a condition that can cause high blood pressure.

Too much sodium can cause the body to retain water, leading to increased blood pressure.

Potassium can also affect blood pressure, as it influences the amount of sodium in the body.

Calcium is important for regulating the contraction and relaxation of muscles, including those of the heart. When calcium levels become too high or excess, it may lead to hypertension.

Therefore, it is important to keep an eye on your mineral intake to ensure that it remains within healthy limits.

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Answer:

The interference is 8

Explanation:

The bond between adjacent amino acids is a covalent peptide bond. A protein is made up of a lengthy chain of amino acids that are connected by peptide bonds.

A water molecule is removed during a biological process that links the carboxyl group of one amino acid to the amino .Peptide bonds are the connected that hold the amino acids of a peptide together in a particular order. Two atoms share an electron pair equally in a covalent link. Peptide (amide) and disulfide links between amino acids, as well as C-C, C-O, and C-N bonds within amino acids, are examples of significant covalent bonds.

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Answer:

Group C

Explanation:

Precision is how close the values are to each other

The new boiling point of the solution is 80.09oC.

The molar mass of an unknown solute can be calculated from the data provided. When an unknown solute is dissolved in a solvent, it affects the freezing point and boiling point of the solution. The amount of depression is directly proportional to the amount of solute present in the solution. The equation that relates these quantities is given by:ΔTf = Kf .m i. ΔTf = depression in freezing point (Freezing point of solvent - freezing point of solution)Kf

= molal freezing point depression constant (specific for each solvent)m i

= molality of the solution (mol of solute / kg of solvent)Here, the depression in freezing point is given as

ΔTf = 2.4oC.

The molality of the solution is given by;mi = 0.056 kg / 78.11 gmol-1

= 0.000718 mol/kgUsing the values of Kf and ΔTf for benzene from literature

(Kf = 5.12 K kg mol-1,

ΔTf = 5.5oC), we can calculate the molar mass of the unknown solute:

5.5oC = 5.12 K kg mol-1 × 0.000718 mol/kg × wSolving for w,

w = 0.117mol/kgMolar mass,

M = mass / moles

= 0.056 kg / 0.117 mol

= 0.478 kg/mol or 478 gmol-1Now, the elevation in boiling point can also be calculated using the equation:

ΔTb = Kb .m i.ΔTb

= elevation in boiling pointKb

= molal boiling point elevation constant (specific for each solvent)mi

= molality of the solution (mol of solute / kg of solvent)For benzene,

Kb = 2.53 K kg mol-1, and

mi = 0.000718 mol/kg

ΔTb = Kb .

m i = 2.53 K kg mol-1 × 0.000718 mol/kg

= 0.00182 K Therefore, the new boiling point of the solution will be 80.09oC (normal boiling point of benzene is 78.11oC).The Molar Mass of the unknown solute is 478 gmol-1. The new boiling point of the solution is 80.09oC.

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The statement C, "The nucleus contains protons and neutrons," is true regarding the composition of an atom among the others.

The number of protons and neutrons in the atom's nucleus are not always equal in an atom.

Instead of electrons, protons are present in the atom's nucleus.

Protons and neutrons are present in the nucleus. Instead of protons, the atom's nucleus is circled by extremely fast electrons.

An atom is chemical structure with protons at its centre and electron revolving around it in predetermined energy shells. The majority of the mass of an atom is contributed by protons and neutrons.  Every atom is about the same size. As a result, C is the correct answer.

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When it comes to the make-up of an atom, among other things, the statement C, "The nucleus contains protons and neutrons," is correct.

In an atom, the number of protons and neutrons in the nucleus is not necessarily equal. The atom's nucleus contains protons rather than electrons. The atom's nucleus is surrounded by incredibly fast electrons rather than protons. An atom is a chemical structure made up of protons in the centre and electrons orbiting in preset energy shells surrounding it. The protons and neutrons in an atom make up the majority of its mass. The size of each atom is roughly the same. Therefore, C is the right response.

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Explanation:

pH (Power of Hydrogen) adalah derajat keasaman yang digunakan untuk menyatakan tingkat keasaman atau kebasaan yang dimiliki oleh suatu larutan. Ia didefinisikan sebagai kologaritma aktivitas ion hidrogen (H+) yang terlarut. Koefisien aktivitas ion hidrogen tidak dapat diukur secara eksperimental, sehingga nilainya didasarkan pada perhitungan teoretis. Skala pH bukanlah skala absolut. Ia bersifat relatif terhadap sekumpulan larutan standar yang pH-nya ditentukan berdasarkan persetujuan internasional

Answer:

the Ph is

Explanation:

90rn hub

Answer:

d

Explanation:

Answer:

I think c

Explanation:

Frochrabonloroluces is an incorrectly spelled term. I believe you might be referring to "chlorofluorocarbons" (CFCs), which are chemical compounds that have been known to pollute the atmosphere.

CFCs are a class of compounds that contain chlorine, fluorine, and carbon atoms. They are known for their ozone-depleting properties and have been widely used in refrigeration, air conditioning, foam manufacturing, and aerosol propellants. When released into the atmosphere, CFCs break down and release chlorine atoms, which can then react with ozone molecules, causing the depletion of the ozone layer. This ozone layer depletion has detrimental effects on the environment and human health, including an increase in harmful ultraviolet (UV) radiation reaching the Earth's surface.
Due to these harmful effects, the use of CFCs has been significantly reduced, and they have been replaced by less harmful alternatives, such as hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs). The global efforts to phase out CFCs are primarily guided by the Montreal Protocol, an international treaty designed to protect the ozone layer.
In conclusion, CFCs are chemical compounds that have been known to pollute the atmosphere and contribute to the depletion of the ozone layer. This has led to increased efforts to phase out their use and find more environmentally friendly alternatives.

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The total pressure of the mixture is 359.5 torr, that is calculated by using ideal gas equation.

Volume of N2, V1=4.0 L

Pressure of N2, P1=450 Torr=450/760 atm

Thus, number of moles of N2, n1= P1V1/RT

=(450/760)*4/0.082*338

=0.085 mol

Similarly,

Volume of O2, V2=3.5 L

Pressure of O2, P2=252 Torr=252/760 atm

Thus, number of moles of O2, n2= P2V2/RT

=(252/760)*3.5/0.082*338

=0.042 mol

Similarly,

Volume of CO2, V3=0.21 L

Pressure of CO2, P3=150 Torr=150/760 atm

Thus, number of moles of CO2, n3= P3V3/RT

=(2150/760)*30.21/0.082*338

=0.001 mol

Total number of moles = n1+n2+n3

=(0.085+0.042+0.21)

=0.128 mol

Total volume, V=7.5 L

Using, ideal gas law

Thus, total pressure, P=nRT/V

=0.128*0.082*338/7.5 atm

=0.473 atm

=0.473*760

=359.5 torr

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Answer:

5596.8 m

Explanation:

42.4 minutes is equal to 2544 seconds.

2544s * 2.2m/s= 5596.8

To prepare a pH 3.90 buffer using 500.0 mL of a 0.250 M Na(HO₂CC)²⁻ solution, you would need to add approximately 0.774 mmol of HCl.

To prepare a buffer at a specific pH, you need to consider the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

In this case, Na(HO₂CC)²⁻ is the conjugate base (A-) and its acid form (HA) is not mentioned. Let's assume that the acid form is HO₂CCOH. The pKa of this weak acid is not provided, so we'll use a typical pKa value for a carboxylic acid, which is around 4.75.

To achieve a pH of 3.90, we can rearrange the Henderson-Hasselbalch equation as follows:

3.90 = 4.75 + log([A⁻]/[HA])

Simplifying:

-0.85 = log([A⁻]/[HA])

Taking the antilog of both sides:

10^(-0.85) = [A⁻]/[HA]

[A⁻]/[HA] ≈ 0.139

Given that the initial concentration of [A⁻] is 0.250 M, the initial concentration of [HA] can be calculated as:

[HA] ≈ [A⁻] / 0.139 ≈ 0.250 / 0.139 ≈ 1.798 M

Now, to prepare a buffer, we need to add HCl to convert the base (A-) to its acid form (HA). The moles of HCl required can be calculated as:

moles of HCl = (initial moles of [HA]) - (moles of [HA] remaining)

moles of HCl = (initial concentration of [HA] × volume in liters) - (final concentration of [HA] × volume in liters)

moles of HCl = (1.798 M × 0.500 L) - (0.250 M × 0.500 L)

moles of HCl ≈ 0.899 - 0.125

moles of HCl ≈ 0.774 mmol

Therefore, you would need to add approximately 0.774 mmol of HCl to prepare the pH 3.90 buffer.

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To determine the number of grams of H₂O produced from 8.53 x 10²³ molecules of O2, we need to use the balanced chemical equation for the reaction that occurs.
The balanced equation for the reaction between O2 and H2 to produce H₂O is:
+2H2 + O2 → 2H₂O

From this equation, we can see that for every 1 molecule of O2, 2 molecules of H₂O are produced. Therefore, we need to calculate how many moles of O2 are present in 8.53 x 10²³ molecules and then use the mole ratio from the balanced equation to determine how many moles of H₂O are produced. Finally, we can convert moles of H₂O to grams using the molar mass of water.

To calculate the number of moles of O2 present in 8.53 x 10²³ molecules, we need to use Avogadro's number.
Number of moles of O2 = (8.53 x 10²³ molecules) / (6.022 x 10²³ molecules/mol)
Number of moles of O2 = 1.42 mol
Using the mole ratio from the balanced equation, we know that 2 moles of H₂O are produced for every 1 mole of O2. Therefore, the number of moles of H₂O produced is:
Number of moles of H₂O = (1.42 mol O2) x (2 mol H₂O / 1 mol O2)
Number of moles of H₂O = 2.84 mol H₂O

Finally, we can convert moles of H₂O to grams using the molar mass of water:
Mass of H₂O = (2.84 mol H₂O) x (18.015 g/mol)
Mass of H₂O = 51.15 g
Therefore, 8.53 x 10²³ molecules of O2 produce 51.15 g of H₂O.

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Answer:

See below!

Explanation:

Chlorine is very electronegative, meaning that it will pull electrons, or negativity toward itself.  When it pulls the negativity towards itself, the chlorine becomes partially negative and the carbon becomes partially positive.  Because of this, the compound is polar.

Answer: Decreases

Explanation: Hope this helps :)

Answer:

B

Explanation:

it's the second one it's actually easy for me

Answer:

Often, chemical changes in the water might result in the release of different minerals such as salt or calcium carbonate. Pressure and heat in the process of creating metamorphic rock can also result in the formation or transformation of minerals.  Minerals in igneous rocks often form where magma has cooled over time.

Explanation:

Minerals only form in certain areas due to presence of specific environment.

Minerals only form in certain areas because of the presence of suitable environmental condition for it. Every mineral needs specific environment for its formation. Without that specific temperature, pressure and some other factors, the mineral can't formed.

Every mineral needs specific environment for its formation which is different from one another so we can conclude that mineral formation needs particular environmental conditions.

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Answer: hehe its kirishima here and the various types of fossil fuels are energy provision coal, oil and natural gas. Coal is a solid fossil fuel formed over millions of years by decay of land vegetation.

haha hope this helped

-yours truly red riot

The correct order of increasing electronegativity for the given set of elements is: s, p, si, f, where fluorine (F) has the highest electronegativity and sodium (Na) is not included in the set.

Electronegativity is a property that describes the tendency of an atom to attract electrons towards itself when it is part of a chemical bond. In general, electronegativity increases across a period from left to right and decreases down a group in the periodic table.

Looking at the given sets of elements: p, f, si, s and s, f, p, si, we can determine the order of increasing electronegativity.

The correct set of elements arranged in order of increasing electronegativity is: s, p, si, f.

Fluorine (F) is the most electronegative element in the periodic table, and it attracts electrons strongly due to its small atomic size and high effective nuclear charge. Therefore, it has the highest electronegativity.

Following fluorine, oxygen (O) has a higher electronegativity than sulfur (S), which in turn has a higher electronegativity than phosphorus (P). This is because electronegativity generally increases across a period from left to right.

Silicon (Si) is less electronegative than phosphorus but more electronegative than sulfur. It is positioned in the middle of the order.

Lastly, sodium (Na) is less electronegative than silicon and is not included in the given set.

(Note: The set s, f, p, si is not in the correct order of increasing electronegativity, as fluorine should have the highest electronegativity.)

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