if you were to test the amino acid valine with biuret, would you see a color change? why or why not?

Answer: 6Fe + 6HCl → 3FeCl3 + 3H2

Explanation:

The equation for the reaction is: 6Fe + 6HCl → 3FeCl3 + 3H2

The relative atomic mass of iron is 55.85. To calculate the amount of hydrogen chloride, we need to first calculate the moles of iron that is reacting. This can be done by dividing the mass of iron (6.16 g) by its molar mass (55.85 g/mol). This gives us 0.11 mol of iron.

Since the reaction is a 1:1 ratio, we know that the same amount of moles of hydrogen chloride will be needed. Thus, 0.11 mol of hydrogen chloride is needed. To calculate the mass of hydrogen chloride, we need to multiply the moles of hydrogen chloride (0.11 mol) by its molar mass (36.45 g/mol). This gives us 4.01 g of hydrogen chloride.

Therefore, the relative atomic mass of iron is 55.85 and the mass of hydrogen chloride needed for the reaction is 4.01 g.

Multiple equilibrium reactions refer to a situation where a species can be involved in more than one distinct equilibrium reaction simultaneously. In other words, a species can undergo different equilibrium transformations depending on the specific conditions or reactants present in the system.

HSO4- (hydrogen sulfate or bisulfate ion) can indeed participate in multiple equilibrium reactions in solution. It can act as both a proton donor and acceptor, leading to different equilibria depending on the reaction conditions.

One example is the equilibrium involving HSO4- as a proton donor:

HSO4- ⇌ H+ + SO42-

In this reaction, HSO4- donates a proton (H+) to the solution, resulting in the formation of a hydronium ion (H3O+).HSO4- will participate in multiple equilibrium reactions in solution. This is because it can act as both an acid and a base, allowing it to react with other species in multiple ways. H2SO4 and SO42- are both strong acids and do not participate in multiple equilibrium reactions. None of the above is a correct answer.

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Answer:

HSO4-

Explanation:

Bisulfate is amphoteric (it can act as either an acid or base): it is produced by the first deprotonation of sulfuric acid, and donates a proton to become the sulfate ion as well. Thus HSO4- appears in two different equilibrium reactions. Conversely, the other two species each participate in only one equilibrium reaction.

Eons are the current name for the large units of time that make up the geologic time scale. Eons can be further broken down into eras, which are then further broken down into periods.

The evolution of life on Earth is frequently depicted alongside the geologic time scale. It occasionally also refers to significant occurrences on Earth, such as the creation of the world's great mountains or the demise of the dinosaurs.

1. Since fossils revealed similar organisms coexisting on Earth at various periods of time, scientists divided Earth's history into several periods. To keep track of how Earth has changed, they gave each period of time a name.

For instance, the Jurassic period included a large number of dinosaurs. Fossils of the planet's very earliest green vegetation from the Ordovician period have been discovered. European scientists made up a large portion of those who originally gave historical periods on Earth names.

2. During the Precambrian age in earth, multicellular organisms are believed to be evolved. The development of life significantly started at the Precambrian era.

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Anodizing a spoon makes it 1) durable and scratch-resistant and 2) prevents the leaching of plain aluminum into food.

Anodizing is an electrochemical process that produces an oxide coating on metal surfaces. This oxide coating makes the metal surface corrosion-resistant, and durable and increases the metal's adhesive qualities (for glues and paint primers). Anodizing is usually done for aluminum and its alloys

Two reasons for anodizing a spoon:

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The absorptiometric determination of acid-soluble lignin is a method used to measure the amount of lignin in semichemical bisulfite pulp, as well as in certain woods and plants. This method involves measuring the absorption of light by the lignin in a sample.

To determine acid-soluble lignin using this method, you would first prepare a sample of the pulp, wood, or plant material. This can involve extracting the lignin using acid or other solvents. Once the sample is prepared, you would then measure its absorbance using a spectrophotometer.

The absorbance of the sample is directly proportional to the amount of lignin present. By comparing the absorbance of the sample to a standard curve, which relates known concentrations of lignin to their absorbance values, you can determine the concentration of lignin in the sample.

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Answer:

1. Draw a pencil line across the filter paper, 1 - 2 cm from the bottom.

2. Use a pipette or capillary tube to add small spots of each ink to the line on the paper.

3. Place the paper into a container with a suitable solvent in the bottom. For example, water. Make sure the water level is below the pencil line.

4. Allow the solvent to move through the paper, but remove the chromatogram before it reaches the top.

5. Allow the chromatogram to dry.

Extras : preferably use a lid to prevent evaporation and use a pencil or any suitable device to prop the paper in place, make sure the sides of the paper doesn't touch the sides of the beaker.

Answer:

See answers below

Explanation:

-44.3 kj/mole   *   x moles =  -  18.7 kj

solve for x = .422 mole  dissolved

Mole weight of  NaOH is

                     Na = 22.989     O = 15.999   H = 1.008    gm/mole

                            = ~~ 40 gm/mole   for NaOH

40 gm / mole   *  .422 mole = 16.88 gm  of NaOH

A. group 1.

Hope this helps.

Answer:

\(\Large \boxed{\mathrm{\bold{A.} \ Group \ 1}}\)

Explanation:

In covalent bonding, atoms share electrons from their last shell to other atoms to gain stability.

Chlorine has 7 electrons in its last shell, it needs to gain 1 electron to become stable.

Group 1 elements have 1 electron in their last shell, they need to lose 1 electron to become stable.

Group 1 elements can bond with chlorine.

Systematic name for each of the following compounds are C49H74O4, C49H74O4, C49H74O4 respectively.

What is natural compound?

Pure compounds are created while factors integrate permanently, forming one substance. For example, while the factors mercury and oxygen integrate, and a chemical response takes place, mercury (II) oxide is created.

A chemical compound is a chemical substance composed of many equal molecules containing atoms from multiple chemical detail held collectively with the aid of using chemical bonds. A molecule which includes atoms of most effective one detail is consequently now no longer a compound

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Salt, sugar, baking soda, etc. Some also consider honey, tap water, and vegetable oil as pure substances.

The vast majority of the reactions you have experienced up until this point only goes in one direction.

To put it another way, by the time the reaction is complete, all of the reactants have been transformed into products. When a reaction of this type takes place, it is said to have gone to completion. This sort of reaction takes place when the products of the reaction are significantly more stable than the reactants.

This is not always the case with reactions. There are occasions when the products interact with one another to produce the reactants again. The reaction that takes place between the reactants in order to produce the products is referred to as the forward reaction. The process by which the products undergo a transformation into the reactants is referred to as the reverse reaction.

1. ATP+H20 yields ADP+ Pi

DeltaG' = -32KJ/mol, Forward reaction occurs.

2. ATP + glycerol yields glycerol 3 phosphate + ADP

DeltaG' = -30.5 - (-9.2) kJ/mol = -21.3 kJ/mol, Forward reaction occurs.

3. ATP +pyruvate yields phosphoenolpyruvate + ADP

3. DeltaG' = -30.5 - (-61.9) kJ/mol = +31.4 kJ/mol, Reverse reaction occurs.

4. ATP+ glucose yields glucose 6 phosphate +ADP

DeltaG' = -30.5 - (-13.8) kJ/mol = -16.7 kJ/mol, Forward reaction occurs.

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Answer:

The answer should be A

Explanation:

because the definition of a subscript is that they indicate the number of atoms of an element present in am molecule or formula unit.

Answer:

The first choice. The rule is go left. Those subscript numbers always talk about the element to the left of them.

Explanation:

The straight forward answer is the first one.

You should always answer that when reading the chemical make up of molecules. Let's look at some examples.

C8 H18

Consider the 8. It must be describing how many carbons there are. If it was meant for the hydrogen, then what  does the 18 mean? You wouldn't know.

Now look at something a lot more complicated.

Mg3(PO4)2

Use the going left rule. That satisfies Mg doesn't it? There are 3 of them and 3 is correct.

The two at the end is also straightforward if you think about it. It must be telling you how many molecules are in the brackets. If that were not so, then you wouldn't be able to tell what it did. So there are 2 PO4

But you still have the 4 to deal with. Use the going left rule again. 4 must be telling you how many oxygens you have inside the brackets. There are 4 of them.

Answer:

2.38 g of oxygen (O2).

Explanation:

What is given?

Mass of potassium chlorate (KClO3) = 6.06 g.

Molar mass of KClO3 = 122.4 g/mol.

Molar mass of oxygen (O2) = 32 g/mol.

Step-by-step solution:

First, let's state the balanced chemical equation. Remember that the decomposition of a compound produces two or more products:

Now, let's convert 6.06 g of KClO3 to moles using its molar mass:

You can see in the chemical equation that 2 moles of KClO3 produce 3 moles of O2. By doing a rule of three with this data, we obtain that:

The final step is to convert from 0.0743 moles of O2 to grams using its molar mass, like this:

The answer is that we will produce 2.38 g of oxygen (O2) from the decomposition of 6.06 g of potassium chlorate (KClO3).

F = ma

a = F/m

a = 150N/165kg

a = 0.909 m/s²

Answer: Your welcome!

Explanation:

A certain frequency of line in the hydrogen spectrum occurs when an electron in the atom transitions from one energy level to another, releasing or absorbing a photon of light with a specific frequency. This frequency is determined by the energy difference between the two levels and is referred to as the Rydberg equation. The Rydberg equation specifies the frequency of the photon as a function of the energy levels and the mass of the electron. The frequency of a line in the hydrogen spectrum is therefore determined by the energy difference between the two levels, as well as the mass of the electron.

Answer:

you didnt put a question lol

Explanation:

Answer:

help with what?

EXPLANATION:

Answer:

All cells share a few features in common, but within a

human there are many types of cells.

Explanation:

Your body has many different kinds of cells. Though they might look different under a microscope, most cells have chemical and structural features in common.

The dissolution equation of the slightly soluble compound al(oh)3 if the solubility product expression is Ksp = [Al3+][OH–]3 will be:

Al(OH₃)\(_{(s)}\) ⇄ Al³⁺\(_{(aq)}\) + 3OH⁻\(_{(aq)}\)

A compound is created when two or more elements combine chemically in a specific mass ratio. Compounds are substances made up of two or more different types of elements in a specific proportion of their atoms. When the elements combine, some of their individual properties are lost and the newly formed compound has new properties.

Chemical formulas serve as a representation of compounds. A chemical formula is a symbolic representation of the atom compositions that make up a specific chemical compound. The chemical formula of water is H2O, which indicates that two hydrogen atoms and one oxygen atom have combined to form one molecule of H2O.

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The shape of a molecule is determined by the repulsion among not only the bonding electron groups but also the non-bonding (lone pair) electron groups. Both types of electron groups contribute to the overall geometry of the molecule and influence its shape. The given statement is false.

In a molecule, the shape is influenced by the arrangement of electron groups around the central atom. These electron groups can be either bonding pairs (resulting from shared electron pairs in covalent bonds) or non-bonding pairs (also known as lone pairs).

The repulsion between electron groups determines the geometry of the molecule. According to VSEPR (Valence Shell Electron Pair Repulsion) theory, electron groups try to position themselves as far apart as possible to minimize repulsion and achieve the most stable arrangement.

In determining the molecular shape, both the repulsion among bonding electron groups and the repulsion between bonding and non-bonding electron groups are considered. Non-bonding electron pairs exert a stronger repulsion compared to bonding electron pairs. Therefore, the presence of lone pairs can affect the overall molecular shape by altering the bond angles and influencing the arrangement of atoms in the molecule.

Hence, to accurately determine the shape of a molecule, it is essential to consider both the repulsion among bonding electron groups and the influence of non-bonding (lone) electron pairs.

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Answer:

Air

Explanation:

It takes up space/ the rest do not

air if you mean elements such as oxygen

Answer:

11 moles of oxygen are necessary to react completely with 5.5 moles of CH₄

Explanation:

The balanced reaction is:

CH₄ + 2 O₂ → CO₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction) , the following amounts of each compound:

Then you can apply the following rule of three:   If by stoichiometry 1 mole of CH₄ reacts with 2 moles of O₂, 5.5 moles of CH₄ reacts with how many moles of O₂?

\(moles of O_{2} =\frac{5.5 moles of CH_{4}* 2moles of O_{2} }{1 mole of CH_{4} }\)

moles of O₂= 11 moles

11 moles of oxygen are necessary to react completely with 5.5 moles of CH₄

Answer:

7.432

Explanation:

There are 100 mg in a decigram, then use that to solve

Answer: 7.423 decigrams

Explanation: 1 mg equals 0.01 decigrams

Answer:1,01

Explanation:

Answer: electrons have a wave like character and can be solved with wave equations

Explanation: it’s the answer

Schrödinger's solution to the wave equation agreed with the Rydberg constant, proving electrons have a wave-like character and can be solved with wave equations. The correct option is C.

Schrödinger's solution tells the position of an electron is space and time. It also tells the energy and position of electrons. It describes the wave nature of the electron.

Rydberg constant is the unit of energy. Its symbol is Ry. It is equivalent to the photon's energy, whose wave number is the Rydberg constant. It is a physical constant.

Either the exponential or the trig functions must be chosen; not both. Particles are traveling left and right in the sin and cos solutions, which represent states of definite energy.

Thus, the correct option is C. Electrons have a wave-like character and can be solved with wave equations regarding Schrödinger's solution.

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Atoms are combining to form molecules

24 moles of nitrogen would fill a 535 liter freezer at standard temperature pressure (stp).

In the given we have, volume of freezer = 535 liter

The 100% nitrogen gas is fill up in freezer instead of food .

nitrogen gas fill in freezer at stp ( standard temperature pressure) and T = 0°C = 273 K

Pressure= 1 atm

We shall find out the moles of nitrogen which fill a 535 liter freezer at stp.

As the temperature and pressure are standard condition i.e., room temperature. So, nitrogen gas behave like ideal gas at room temperature.

using ideal gas equation , PV = nRT where P is standard pressure, T is room temperature, n is number of moles of nitrogen and R is gas constant .

given, P = 1 atm ,T = 273K , R = 0.0829 L atm/mol K and V= 535 L

put in above equation,

1 atm × 535 L = 273 K ( 0.0829 L atm/ mol K ) n

=> n = 535 / 273(0.0829) mole

=> n = 23.61 mole ~ 24 moles of nitrogen

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Answer:

C. The second equation must be halved

D. The second equation must be reversed

E. The third equation must be halved.

Delta Hrxn= 131.3 kJ

Explanation:

The correct answer is -582 KJ.

What is the enthalpy of reaction?

What is the overall enthalpy of the reaction?

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