Which of the following questions can be answered by science? a What makes a song sound beautiful? b What is the meaning of life? c What makes a painting beautiful? d What are the effects of low pH in soil?

Answer:

The answer to above is Unit cell

the passage describing a neutral atom of nitrogen-14 (N-14) is as follows:

Its nucleus comprises seven protons.

Its nucleus of it has seven neutrons.

Around the nucleus, there are seven electrons arranged in orbits.

Its protons make up its atomic number.

Protons and neutrons together make up their atomic mass.

What is nitrogen-14?

It is demonstrated that nitrogen-14 NMR spectra with spin I = 1 can be detected indirectly in powders spinning at the magic angle (MAS). The approach is based on the transmission of coherence to single- or double-quantum transitions of nitrogen-14 nuclei from a nearby nucleus with S = 1/2, such as carbon-13. Second-order quadrupole–dipole cross terms, also referred to as residual dipolar splittings, are responsible for coherence transfer. The second-order quadrupolar interactions of nitrogen-14 are shown to be responsible for the powder patterns in the two-dimensional NMR spectra. The nitrogen-14 quadrupolar coupling constant, CQ, and asymmetry parameter, Q, are obtained through spectra analysis. These variables may be connected to the solids' structure that contains nitrogen.

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The molarity of 200 grams of glucose (c6h12o6) in 1.0 liters of solution is 1.11M solution

Molarity is number of moles of solute per one liter of solution. Symbol for molarity is capital M.

In chemistry, solution is a mixture of two or more substances in which neither substance changes chemically. For example, salt water is solution that contains water (the solvent) and salt (the solute). Concentration is amount of dissolved substance in a solution. In other words, it is the amount of the  stuff that has been mixed into your liquid, concentration is usually measured in molarity.

A mole is basic unit in chemistry. It is the amount of substance in grams that contains as many atoms, molecules, or ions as 12 grams of carbon-12  (6.022 x 1023) does. Molarity is number of moles of a solute per liter of solution. If we wanted to know the molarity of our salt water solution, we would want to know how many moles of salt are in every 1 liter of  water.

So to calculate,

molarity=moles of solute/ liters of solution

molarity= 200g c6h12o6 ( 1mol/180g)= 1.11mol c6h12o6

1.11 mol/1.0liters= 1.11M solution

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Answer:

............................

Explanation:

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The Na+ /K+ pump transports three sodium ions out of the cell for every two potassium ions moved into the cell. This is an example of an antiport pump.

The function of Na+ /K+ pumps is to maintain the osmotic equilibrium and membrane potential inside the cells of living organisms. These pumps facilitate the movement of sodium and potassium ions against the concentration gradient.

In this question, three sodium ions out of the cell for every two potassium ions moved into the cell. This means the movement of ions is bidirectional. So, this is an example of an antiport pump.

Therefore, the Na+ /K+ pump is an example of an antiport pump that is classified in the category of active transport.

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Potassium hydroxide (KOH), when in an aqueous solution, splits into two ions, a potassium K+K+ cation, and a hydroxide OH−OH− anion.

K+(aq)+OH−(aq)+H+(aq)+Cl−(aq)→K+(aq)+Cl−(aq)+H2O(l)

Similarly, hydrochloric acid (HCl), when in an aqueous solution, breaks into two ions, a proton H+H+ cation, and a chloride Cl−Cl− anion.

The dissociation of a compound turns upon its solubility.

According to the ionic equation, in the response between HCl and KOH, the potassium K+K+ cation and the chloride Cl−Cl− anion do not accept a stake in the chemical equation. These are spectator ions.

OH−(aq)+H+(aq)→H2O(l)

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A chemical reaction gives off  2,100 kJ of heat energy which is 5.0×10^5 calories.

What is  heat energy?

The movement of minuscule atoms, molecules, or ions in solids, liquids, and gases produces heat energy. From one thing to another, heat energy can be exchanged. Heat is the flow or transfer that occurs as a result of the temperature differential between two objects.

1KJ = 1000J

2100KJ = 2100×1000

=2,100,000J

Let a be the no. of calories.

1 Calorie =4.18J

a calorie =2100000J

a= 2100000/4.18

a= 502392.3445

a = 5.0× 10^5 calories

Question:

A chemical reaction gives off 2,100 kJ of heat energy.

About how many calories is it equal to?

(1 calorie=4.18 Joules)

(a)5.0 × 10³ calories

(b)5.0×10^4 calories

(c)5.0×10^5 calories

(d)5.0×10^6 calories

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To destroy the unreacted Bromine

Bromination of aniline is carried out in by reacting aniline with bromine and acetic acid. This reaction results in a tri-substituted product called 2,4,6 tribromoaniline which is a white precipitate

During Bromination reaction , Sodium Bisulfite may be added  if there is any unreacted bromine left in the reaction mixture. This is necessary because unreacted Bromine can interfere with the reaction due to bromine's oxidizing characterstics.

Sodium Bisulfite Solution is a reducing agent and it can convert unreacted bromine and bromate by reducing it to bromide.

Moreover, Sodium bisulfite can also help in discharge the resulting colour of the solution due to the bromine present.

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Answer:

for pH 13 it = strong based the ph 2 is= weak acid

Explanation:

Taking into account the definition of mass number, atomic number and charge of an atom, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.

All atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them.

The atomic number indicates the number of protons that are present in the nucleus of an atom.

If the atom is electrically neutral, the positive charge of the protons is balanced by the negative charge of the electrons. That is, the number of protons in the nucleus is equal to the number of electrons in its orbitals, so that in a neutral atom the atomic number also indicates the number of electrons.

The mass number indicates the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus.

The atomic number of chlorine is 17, while the mass number of chlorine-35 is 35.

So, being a neutral atom, by definition of atomic number the amount of protons and electrons that the isotope of chlorine has is 17.

Finally, knowing the number of protons and the atomic mass of the isotope, the number of neutrons is calculated by:

35 =17 + number of neutrons

35 - 17 = number of neutrons

18= number of neutrons

In summary, the number of protons and electrons of the isotope of chlorine named chlorine-35 is 17, while the number of neutrons is 18.

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In the exponential smoothing, the closer alpha is to 1, the greater the reaction to the most recent demand.

Exponential smoothing is a way to smooth out data for the presentations or to make forecasts. It’s usually used for the finance and economics. If you have a time series with a clear pattern, you could use moving averages — but if you don’t have a clear pattern you can use the exponential smoothing to forecast.

Damping Factors

Perhaps one of the most confusing aspects of the exponential smoothing is the damping factor. Damping factors are used to smooth out graph and take on a value between 0 and 1. Technically, damping factor is 1 minus the alpha level (1 – α). But all you really need to know is the smaller alpha levels (i.e. larger damping factors), smooths out peaks and valleys more than larger alpha levels (smaller damping factors). Smaller damping factors also mean that your smoothed values are closer to actual data points than larger damping factors.

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Calcium carbonate (CaCo3) is a white solid and gaseous with the density of 2.71 g/cm^3 that can be easily calculated or observed without a chemical reaction, so it is simply a physical property.

Now the second sentence says that it reacts readily with an acid to produce gaseous carbon dioxide.

Let's take a chemical reaction:

CaCO3( Calcium Carbonate) + 2HCl (Hydrochloric Acid) ----> CaCl2 (Calcium Chloride) + CO2 (Carbon Dioxide) + H2O (Water)

Hence it readily reacts with acids so it is clearly a chemical change and falls into chemical property.

Physical properties denote or comprises density, color, melting and boiling point where as chemical properties comprises of it goes in a particular chemical reaction and changes.

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Answer:

What you created using the tightly wound wire around the nail is called a solenoid [ sōl -ë-noid]. When an electric current passes through the wire, it creates a magnetic field in the metal core (the nail). When the wire is wrapped around the iron nail and the battery is strong enough, you create a simple electromechanical solenoid.

Explanation:

The average interest rate for a savings account in 2021 is 0.4 Compounding continuously.  it will take 11.8 years to double your money

               A = Peⁿt

   50000/25000 =  25000e/25000

     2 = [tex]e^{0.0588t}[/tex]                                         ( e = 2.73)

                                                                (0.0588t)

ln = log[tex]_{e}[/tex]

ln(2) = ln([tex]e^{0.0588t}[/tex])

[tex]\frac{ln(2)}{0.0588}[/tex] = [tex]\frac{0.0588t}{0.0588}[/tex]

t = 11. 788

t = 11.8 years.

So it'll take approximately 11.8 years for the investment to double if it's compounding continuously at 5.88%.

The best savings account interest rates are around 2%. At a brick-and-mortar bank, you'll often find savings rates closer to the national average, which is currently 0.13%.

High-Yield Checking Accounts

There are high-yield checking accounts that provide better interest rates than savings accounts. a number of these checking accounts offer up to a 2% annual percentage yield, in contrast to lower bank account rates.

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Very long and large organic molecules called Polymer are made of small units called Monomer

polymer is a long molecule consisting of many similar or identical building blocks linked by covalent bonds on the other hand monomer is the building blocks that make up a polymer.

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Combustion of octane

16 CO2(g) + 18 H2O = 2 C3H18(1) + 25 O2(g) (1)

ΔΗO -10, 932 kJ

What is combustion?

Combustion is the process of a substance burning in the presence of oxygen to produce heat and light.

You may have heard that some materials are combustible while others are not. Simply put, combustible compounds are those that go through this process.

Burning is actually referred to as combustion in science. Burning is a phenomenon that we are all familiar with, but did you realise that it is also a chemical reaction? Any fuel reacts chemically with air (an oxidant) during combustion to produce heat energy. Additionally, a flame will appear as a result of the release of heat energy.

Following complete combustion, octane (C,H,g, density = 0.699 g/mL) produces energy as shown by the following reaction:

16 CO2(g) + 18 H2O = 2 C3H18(1) + 25 O2(g) (1)

ΔΗO -10, 932 kJ

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The atoms potassium(K) and chlorine(Cl) are most likely to form ions and thus an ionic bond with each other.

What are ionic bonds?

An ionic bond is a particular kind of chemical bond that is created by the electrostatic attraction of two ions with opposing charges. These ions are produced when two atoms, typically a metal and a non-metal, exchange their valence electrons.

The elemental couples that have the highest likelihood of forming an ionic connection are Cl and K.

Since,

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It will take 5730 years.

The radioactive isotope of carbon with the symbol 14C, often known as radiocarbon, has an atomic nucleus made up of 6 protons and 8 neutrons. The radiocarbon dating technique, developed by Willard Libby and colleagues in 1949 to date archaeological, geological, and hydrogeological samples, is based on its presence in organic molecules.

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Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each of their atoms, this is why one of them is radioactive and the other isnt

(Not sure)

Answer:

Carbon-12 is stable, meaning it never undergoes. radioactive decay. Carbon-14 is unstable and undergoes radioactive decay with a half-life of about 5,730 years (meaning that half of the material will be gone after 5,730 years)

429.57 g is the mass in grams of 387 ml of ethylene glycol.

What is ethylene glycol?

Ethylene glycol is also called ethane 1,2 diol. This organic compound is highly toxic.  it's also known as Ethane-1,2-diol or Monoethylene glycol. it has no smell and is viscous.

cm^3 = mL

1.11 g/cm^3 = 1.11 g/mL

Density (g/mL) multiplied by volume (mL) will give us the mass (g)

1.11 g/mL * 387 mL = 429.57 g

The mass of ethylene glycol is 429.57 g.

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The moles of na₂so₄ are in a 0.140 m aqueous solution that was prepared with 2.30 kg of water is 0.00032moles

The formula for calculating the molarity of a substance is expressed as;

molarity = moles/Volume

Given the following parameter

Molarity = 0.140M

volume = mass/density

Volume = 2.30/997 kg/m³

Volume = 0.0023m³

Determine the required moles

Moles of na₂so₄ = molarity * volume

moles of na₂so₄ = 0.140 * 0.0023

moles of na₂so₄ = 0.00032moles

Hence the moles of na₂so₄ are in a 0.140 m aqueous solution that was prepared with 2.30 kg of water is 0.00032moles

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Coenzymes such as NADH and FADH2 are used to carry electrons to and from many kinds of oxidation/reduction reactions.

What are coenzymes?

A macromolecule that catalyses a chemical process is an enzyme. In other words, it creates the possibility of a negative reaction. Smaller molecules are used to construct enzymes to create an active component. The coenzyme is one of an enzyme's most crucial components.

Small molecules make up coenzymes. They are unable to catalyse reactions on their own, but they can assist enzymes in doing so. Coenzymes are organic nonprotein molecules that join with the protein molecule (apoenzyme) to create the active enzyme, according to the technical definition (holoenzyme).

In biological oxidation-reduction reactions, NADH and FADH2 are two coenzymes that are extremely important. Along with the transfer of electrons, hydrogen ions also occur.

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The proportion of z-scores fall between the z-score of - 0.22 and a z-score of 1.7 is 0.5425.

When assessed in terms of standard deviation units, a raw score's location in relation to its distance from the mean is indicated by a z-score. The z-score is positive when a value is above the mean and negative when a value is below the mean.

Because it standardizes the distribution, it enables comparison of scores on many types of variables, hence the name "standard score." A normally shaped distribution with a mean of 0 and a standard deviation (SD) of 1 is known as a standard normal distribution (SND).

The two z scores given are -0.22 and 1.7.

Now, according to the z score value table, we get;

For z score value - 0.22,

The area between the mean and z is 0.0871.

For a z score value of 1.7,

The area between the mean and z is 0.4554.

Then the proportion of z scores falling between the z score of - 0.22 and a z score of 1.7 will be:

0.0871 + 0.4554 = 0.5425

The correct option is (c).

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A 5.00 l container is filled with 0.300 atm acetylene and 0.800 atm hydrogen, which react according to: C2H2(g) + 2 H2(g) C2H6

what is a reaction?

A chemical reaction occurs when two or more molecules collide with the right orientation and enough force to produce a new product. Atomic bonds are created and disrupted throughout this process. Products, as opposed to reactants, are the compounds that result from an interaction between two other substances.

Substances are made up of chemical components or chemical elements. The atoms that make up the reactants in a chemical reaction are rearranged to create different products. A essential aspect of life itself, as well as technology and civilization, are chemical reactions.

0.300 atm acetylene and 0.800 atm hydrogen are placed in a 5.00 l container, where they react as follows: C2H2(g) + 2 H2(g) C2H6.

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Tension force is the force applied on the ball in a horizontal direction or along the that makes the ball in motion

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The level of sodium and potassium are constant but there is a transmembrane potential charge because Na and K levels are not equal within and outside the cell.

The membrane potential is a difference in the electrical charge of ions such as sodium and potassium across the plasma membrane, which is used by the cell to carry out different functions.

In conclusion, the level of sodium and potassium are constant but there is a transmembrane potential charge because Na and K levels are not equal within and outside the cell.

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Answer: no

Explanation:

It aint got the dingdong and besides whos the mommyy??

the sun produces high frequency waves like gamma rays.

The gas will continue to occupy the same volume.

Absolute temperature is exactly proportional to kinetic energy; it is independent of the characteristics of any given substance.

What is absolute temperature?

Using the Kelvin scale, where 0 is absolute zero, absolute temperature is measured. The zero point is the temperature where matter's particles move the least and cannot get any colder.

The Kelvin scale's absolute zero represents the starting point for measuring absolute temperature. The study of thermodynamics is one scenario in which one might utilize absolute temperature as a unit of measurement. temperature measured on the Rankine or Kelvin scales starting from absolute zero.

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We will obtain the product 4-(methylamino)butanoic acid

What is industrial process?

Heavy industry comprises a sizable portion of industrial operations. They include manufacturing-related chemical, physical, electrical, and mechanical processes. Most often, it is employed in large-scale industrial initiatives. Companies use a variety of industrial processes to create or shape a product.

The idea behind the reaction between mathrmN and N-methyl-2-pyrrolidone serves as the foundation for this issue. An chemical molecule called N-methyl-2-pyrrolidone has a lactam with five members. NMP is the abbreviation for it. It is a useful substance that is employed in the recovery of hydrocarbons produced during the manufacturing of petrochemicals.

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Answer:

arsenic

Explanation:

Name                         -Arsenic

Symbol                         -As

Atomic Number         -33

Atomic Mass                 -74.9216 atomic mass units

Number of Protons -33

Number of Neutrons -42

Number of Electrons -33

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