all smart people i need help

Answer:

ya tu sabes cómo se los aseguro

The net ionic equation for the reaction between nitric acid (HNO3) and a carbonate ion (CO32-) in solution is:

2H+ + CO32- → CO2 + H2O

In this reaction, the H+ ions from the nitric acid react with the CO32- ions from the carbonate, producing carbon dioxide (CO2) and water (H2O). The nitrate (NO3-) ion does not participate in the reaction and is therefore not included in the net ionic equation.

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Answer:

it is alredy balanced

Explanation:

CaCO3 -------> CaO + CO2

In the reactant side In the product side

Ca = 1 atom Ca = 1 atom

C = 1 atom C = 1 atom

O = 3 atom O = 1+2 = 3 atom

so there is no need to balance it cause it is already balanced.

Answer:

C

Explanation:

Actually, arranged to the size of smallest to least atom radius size = C

Atomic sizes generally get smaller as you go from L to R across a row of the periodic table.

These are simplified explanations of the mechanisms involved in these enzyme-catalyzed reactions, highlighting the key steps and substrate interactions.

Glyceraldehyde-3-phosphate dehydrogenase:

The mechanism of Glyceraldehyde-3-phosphate dehydrogenase involves multiple substrates. Here's a step-by-step explanation:

D-glyceraldehyde-3-phosphate, NAD+, and P bind to the active site of the enzyme.

The enzyme catalyzes the oxidation of D-glyceraldehyde-3-phosphate by transferring a hydride ion (H-) from D-glyceraldehyde-3-phosphate to NAD+, forming NADH.

The P (inorganic phosphate) binds to the carbonyl group of the oxidized D-glyceraldehyde-3-phosphate, resulting in the formation of 3-phospho-D-glycerol phosphate.

NADH and 3-phospho-D-glycerol phosphate are released from the active site of the enzyme.

Glutamate dehydrogenase:

The mechanism of Glutamate dehydrogenase also involves multiple substrates. Here's a step-by-step explanation:

2-ketoglutarate, NH4+, and NAD(P)H bind to the active site of the enzyme.

The enzyme catalyzes the oxidative deamination of 2-ketoglutarate by transferring an amine group (NH3) from 2-ketoglutarate to NAD(P)H, forming NAD(P)+ and L-glutamate.

H2O is added to the amine group of the intermediate L-glutamate, resulting in the formation of L-glutamate as the final product.

NAD(P)+ and H2O are released from the active site of the enzyme.

Isocitrate dehydrogenase:

The mechanism of Isocitrate dehydrogenase also involves multiple substrates. Here's a step-by-step explanation:

2-ketoglutarate, CO2, and NADH bind to the active site of the enzyme.

The enzyme catalyzes the oxidative decarboxylation of 2-ketoglutarate by removing a carboxyl group (CO2) from 2-ketoglutarate, resulting in the formation of isocitrate and NAD+.

NAD+ is reduced to NADH during this step.

Isocitrate is converted into an intermediate that undergoes isomerization, forming α-ketoglutarate.

NADH and α-ketoglutarate are released from the active site of the enzyme.

These are simplified explanations of the mechanisms involved in these enzyme-catalyzed reactions, highlighting the key steps and substrate interactions. The actual mechanisms may involve additional intermediate steps and cofactors.

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Answer:

observation

Explanation:

To determine the current equation at Node 1 using the voltages v1 and v2, we need to analyze the circuit connected to Node 1 and apply Kirchhoff's current law (KCL).

KCL states that the sum of currents entering a node must equal the sum of currents leaving the node. At Node 1, we can write the current equation as:

I1 = I2 + I3

Where I1 is the current at Node 1, I2 is the current entering Node 1 from a connected component, and I3 is the current leaving Node 1 to another connected component.

To express I1 in terms of v1 and v2, we can use Ohm's law and the relationship between voltage, current, and resistance. Let's assume that the connected components at Node 1 consist of resistors with values R2 and R3.

Using Ohm's law, we can write the following equations for I2 and I3:

I2 = v1/R2

I3 = v2/R3

Now, substituting these values into the KCL equation, we have:

I1 = v1/R2 + v2/R3

Thus, the current equation at Node 1, in terms of the voltages v1 and v2, is given by:

I1 = v1/R2 + v2/R3

This equation represents the relationship between the currents and voltages at Node 1, taking into account the resistances of the connected components. By knowing the values of R2 and R3, as well as the voltages v1 and v2, you can calculate the current I1 flowing through Node 1 in the circuit.

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Carbon (C) contains the largest number of moles.

Number of Moles of a substance can be defined as the ratio of given mass of the substance to the Molecular Mass of the substance.

We can write,

Number of moles = Given Mass / Molecular Mass                euation1

Given Mass of Na, C, Pb, Cu, Ne each = 10.0g

Molecular mass of Na = 22.9898 u

Molecular mass of C = 12u

Molecular mass of Pb = 207.2u

Molecular mass of Cu = 63.546 u

Molecular mass of Ne = 20.1797 u

After substituting the values of molecular mass and given mass of elements in equation1 , we will get

Number of moles of Na = (10/22.9898) = 0.4350

Number of moles of C = (10/12) = 0.8333

Number of moles of Pb = (10/207.2) = 0.0483

Number of moles of Cu = (10/63.546) = 0.1574

Number of moles of Ne = (10/20.1797) = 0.4955

So, we can clearly see that Carbon contains the largest number of moles.

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Answer:

When you bake a cake, the ingredients go through a chemical change. A chemical change occurs when the molecules that compose two or more substances are rearranged to form a new substance! When you start baking, you have a mixture of ingredients. The flour, egg, sugar,

Explanation:

Machines make our works easy and fast. Nowadays there are many modern small and bigger machines designed to meet particular requirements.

Machines are apparatus with several parts works with the use of mechanical power. There are large number of types of machines which are designed for different purposes in every field, agriculture, medical field, research field etc.

There are many small machines such as screw gauges to large machines used in power generators and machines in factories and laboratories. Machines are working in a programmed way with in desired time and make us effortless.

Machines can be used in non-genuine and non -commercial  purposes also. However, nowadays novel machines are designing to be employed to meet todays requirements.

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The monosaccharide present in DNA is β-D-2-deoxyribose.

1. Identify the monosaccharide present in DNA: The sugar in DNA is a deoxyribose, which is a modified form of ribose where one of the hydroxyl (OH) groups is replaced by a hydrogen (H) atom.
2. Specify the configuration: The configuration of this sugar is D, meaning the molecule is a right-handed isomer.
3. Determine the furanose form: Furanose refers to a 5-membered ring structure that includes four carbon atoms and one oxygen atom. In the β-furanose form, the anomeric carbon (C1) has the same orientation as the highest numbered chiral carbon (C5 in this case).
4. Assemble the structure: To complete the structure, draw a 5-membered ring with four carbons and one oxygen, with the hydroxyl groups and hydrogen atoms attached to the appropriate carbons. The β-D-2-deoxyribose structure will have the hydroxyl group on C1 facing upward, in the same direction as the -CH2OH group on C5.

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The most essential compound needed to sustain life as we know it is water. Therefore the correct option is option B.

Water is necessary for life for a number of reasons. It makes up a sizable portion of the human body and is essential for a variety of internal processes, such as controlling temperature, transferring nutrients and waste, and lubricating joints. Many other organisms depend on water for survival, and plants use it for photosynthesis.

Although it is likewise essential for life as we know it, oxygen is not regarded as a compound. Many species, including humans, require oxygen, an element, in order to breathe. Therefore the correct option is option B.

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For the Question "Which of the following represents a covalent compound?" we have

From the Question we are told

'3. c

Generally

a covalent compound is a kind of bond in which valence electrons are shared b/w the party atoms forming the bond

Therefore

We see covalent compound in CO_2 as they match perfectly the phenomenon that is covalent bonding

Therefore

For the Question "Which of the following represents a covalent compound?" we have

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Diatoms are single-celled algae that have a silica (silicate) shell called a frustule.

Diatoms are photosynthetic organisms and are known for their intricate and diverse shapes. Diatoms are commonly found in freshwater and marine environments and play a significant role in the global carbon cycle.

Micrite is a fine-grained carbonate sedimentary rock composed of tiny carbonate particles. It forms through the precipitation and accumulation of carbonate minerals, such as calcite or aragonite, in marine environments. In the case of chalk, which is primarily composed of microscopic fragments of calcium carbonate from marine organisms, recrystallization can occur at the ocean bottom under specific conditions, leading to the formation of micrites.

Therefore, it's important to note that chert, marble, and quartzite are not the typical products of recrystallization of chalk at the ocean bottom.

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Answer:

D

Explanation:

the higher temperature is, the faster air molecules move and the air will expand. Moreover, the container is sealed, which means the pressure laying on its internal surface is higher than any cases above

Answer:

What do you mean need more details

Explanation:

Since a help device is a a communication gadget, we know that the help device will make use of radio waves.

A help device refers to a device that can be used for emergency communication. They are basically communication gadgets.

We must note that our communication gadgets such as television,  radio, cell phone etc all make use of radio waves. Hence a help device would make use of  radio waves.

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Answer: A

Explanation: Based on the Law of conservation of mass the total mass of the reactants will equal to the total mass of the products. This happens as matter is not destroyed.

Answer:

Halogens

Explanation:

The halogens are a series of non-metal elements from group 17 of the periodic table (formerly VII). The halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Answer:

halogens

Explanation:

just did the test on edg!

Answer:

its c

Explanation:

i took the test and got a 100

Assuming that the trends continue, sodium chloride compound will have the greatest solubility at 120 ℃.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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The chemical equation that describes a precipitation reaction is option B:

BaBr₂(aq) + H₂SO₄(aq) → BaSO₄(s) + 2HBr(aq)

In this equation, when barium bromide (BaBr₂) reacts with sulfuric acid (H₂SO₄), it forms barium sulfate (BaSO₄) as a solid precipitate, which is indicated by the "(s)" state symbol. The other product formed is hydrobromic acid (HBr) in the aqueous state, as indicated by the "(aq)" state symbol.

Precipitation reactions occur when two aqueous solutions react to form an insoluble solid product, known as a precipitate. In this case, the barium sulfate precipitates out of the solution as a solid, indicating a precipitation reaction.

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According to the electronic configuration, platinum is least reactive and is a noble metal.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.Elements undergo chemical reactions in order to achieve stability.

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There are no forces of attraction between the particles.

The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely from each other. In most cases, there are essentially no attractive forces between particles. This means that gas has nothing to hold a specific shape or volume.

In the physical sciences, a particle (or corpuscle in older texts) is a small localized object to which can be ascribed several physical or chemical properties, such as volume, density, or mass. They vary greatly in size or quantity, from subatomic particles like the electron to microscopic particles like atoms and molecules, to microscopic particles like powders and other granular materials. Particles can also be used to create scientific models of even larger objects depending on their density, such as humans moving in a crowd or celestial bodies in motion.

The term particle is rather general in meaning and is refined as needed by various scientific fields. Anything that is composed of particles may be referred to as particulate. However, the noun particulate is most frequently used to refer to pollutants in the Earth's atmosphere, which are a suspension of unconnected particles, rather than a connected particle aggregation.

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The volume of the solution that we are looking for in the problem is 0.06 moles

A stock solution refers to a concentrated solution of a substance that is prepared with the intention of diluting it to obtain lower concentrations for various applications.

From part A;

Number of moles of luminol = 20g/177 g/mol

= 0.11 moles

Molarity =  0.11 moles * 1000/75 L

= 1.45 M

From part B;

Number of moles = Concentration * volume

= 0.03 M * 2L

= 0.06 moles

From part C;

Volume = Number of moles /Concentration

= 0.06 moles/1.45 M

= 0.04 L or 40 mL

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For the determination of equilibrium constant experiment, the purpose is to find the equilibrium constant (K) of the equilibrium reaction as follows: Fe³+ (aq) + SCN- (aq) = FeSCN²+ (aq)

The formulas that you need to know to complete this lab work are as follows:

Equilibrium constant,

Kc= [Products]^n/[Reactants]^m

where n and m are the stoichiometric coefficients of the products and reactants respectively; Concentration, c= n/V, where n is the amount of solute and V is the volume of solution; Molar extinction coefficient,

ε= absorbance/ (concentration * path length)

The first step for the lab is to prepare 0.200 M Fe(NO3)3 solution and 0.0020 M KSCN solution. After that, you will take 5.0 ml Fe(NO3)3 solution and add 5.0 ml of KSCN solution into it. You will take a blank solution with 10 ml distilled water. You will also take a reference solution of FeSCN²+ with known concentration. The solutions need to be mixed well to reach equilibrium.The next step is to measure the absorbance of the blank, reference, and sample solutions. The absorbance of the sample solution needs to be measured at 447 nm wavelength.Using the molar extinction coefficient and Beer’s law equation, you can find the concentration of FeSCN²+ in the sample solution. The concentration can then be used in the equilibrium constant equation to calculate the equilibrium constant, Kc.

You will repeat the experiment for several different Fe(NO3)3 and KSCN concentrations to obtain a set of data points. Then you can graph [FeSCN²+] vs. [Fe³+][SCN-] to obtain the equilibrium constant, Kc.

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The equilibrium constant, K is an important property of a chemical system which helps in understanding the extent to which a reaction goes to completion. It is defined as the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium. The experiment to determine the equilibrium constant of a reaction requires a few formulas and a graph. The reaction being studied in this experiment is:

Fe³+ (aq) + SCN- (aq) ⇌ FeSCN²+ (aq)

To determine the equilibrium constant of this reaction, one must first prepare a set of solutions with different initial concentrations of Fe³+ and SCN-. The initial concentration of Fe³+ is fixed, and the initial concentration of SCN- is varied. Then, a small amount of Fe³+ is added to each solution, which reacts with SCN- to form FeSCN²+. The amount of FeSCN²+ formed is measured and recorded. This process is repeated for each solution, with a different initial concentration of SCN-. The concentration of FeSCN²+ at equilibrium for each solution is calculated using the following formula:

[FeSCN²+]eq = (Abs – (AεFeSCN²+))[FeSCN²+]eq  = Abs - (AεFeSCN²+)

where Abs is the absorbance of the solution, A is the path length of the cuvette, and εFeSCN²+ is the molar absorptivity of FeSCN²+.

The equilibrium concentrations of Fe³+, SCN-, and FeSCN²+ can then be calculated using the initial concentrations and the amount of FeSCN²+ formed at equilibrium. Finally, the equilibrium constant of the reaction can be calculated using the equation:

K = [FeSCN²+]eq / ([Fe³+]eq [SCN-]eq)

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To derive an expression for G/RT as a function of A and xi, we start with the Gibbs-Duhem equation: Σxi d(ln γi) = 0.

Integrating this equation gives: ∫d(ln γi) = 0. Integrating again and using the relation ln γi = ln yi - ln xi, we have: ln yi - ln xi = A ln xi + B. Rearranging the equation, we get: ln yi = (A + 1) ln xi + B. Taking the exponential of both sides, we obtain: yi = Kxi^(A+1), where K = e^B. (b) To determine the numerical value of the constant K, we can use the given data. At x" = 0.807, the mole fraction of the more volatile component (water) is yn = 0.807. Substituting these values into the equation above, we have: 0.807 = K(0.807)^(A+1).

Simplifying, we get: K = 0.807^(1-A). (c) Using the modified Raoult's law, the pressure at x" = 0.807 and T = 335.15 K can be determined. The modified Raoult's law equation is: P = Σxi γi P^sat, where P^sat,i is the vapor pressure of component i. Assuming an ideal gas mixture, we can use the Antoine equation to estimate the vapor pressures. Solving the equation above for P and substituting the given mole fraction and activity coefficient (A = -0.807), we can calculate the pressure at x" = 0.807 and T = 335.15 K.

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Answer:

it is A.HCI, H2S, PH3

Explanation:

I took the test

Answer:

A) Boron

Explanation:

I put oxygen and it was wrong lol. So, it said it was Boron

Answer: