How many particles are present in the 21.8 g of NaOH

Answer:

OXIDATION/REDUCTION

Explanation:

Ba has been transformed from a neutral atom to a +2 ion

O has been transformed from a neutral atom to a -2 ion

Answer:Aluminum metal in silver nitrate ….

You might be expecting silver metal, Ag, and aluminum nitrate, Al(NO3)3, as products. But instead all you will end up with is wet aluminum. The passivating layer of Al2O3 will prevent aluminum from reducing silver ions.

Explanation: Al(s) + AgNO3(aq) → No reaction

The two things we might do to the mixture to disrupt the Al2O3 surface will cause the Ag+ ions to react. Often a source of chloride ion is used because AlCl4^- will form, exposing the aluminum surface. But that will cause AgCl(s) to precipitate. You can also make the solution basic with NaOH and form Al(OH)4^-, but that will cause Ag2O(s) to form. (You will get Ag2O instead of AgOH.)

Concentrated acids will oxidize any aluminum metal that might be exposed if you were to add concentrated HNO3. That would simply enhance the

I think it's OPTION D

The density of the cube with sides of 2cm and a mass of 100g is 12.5 g/cm³.

How to calculate the density of the cube?

The density of the object is defined as its mass-per-unit volume. In this case, we know the mass of the cube and we can calculate its volume as the cube of the length of its sides.

The volume of the cube is:

V = (2 cm)³ = 8 cm³

Next, The density can be calculated using the following formula:

Density = mass / volume

Density = 100 g / 8 cm³ = 12.5 g/cm³

Therefore, the density of the cube is 12.5 g/cm³.

To learn more about density, visit: https://brainly.com/question/28348989

#SPJ1

The preferred chair to sit on a sunny day is the one made of aluminum. It offers a more comfortable seating experience compared to the iron chair. The aluminum chair's higher specific heat capacity helps it absorb less heat and stay cooler.

Aluminum is the preferred choice for sitting on a sunny day due to its higher specific heat capacity (c=0.89 J/g°C) compared to iron (c=0.45 J/g°C). Specific heat capacity refers to the amount of heat energy required to raise the temperature of a substance by one degree Celsius per gram.

When exposed to the sun, both chairs will absorb heat energy from the sunlight. However, aluminum has a higher specific heat capacity, meaning it can absorb more heat energy per gram compared to iron. This results in the aluminum chair heating up at a slower rate than the iron chair.

The slower rate of heat absorption by the aluminum chair makes it more comfortable to sit on during a sunny day. It will take longer for the aluminum chair to reach an uncomfortable temperature compared to the iron chair, providing a more pleasant seating experience.

Learn more about Aluminum Chair

brainly.com/question/29446016

#SPJ11

If x = − 4,  number line shows the value of |x| is 4 tick mark to the left of zero.

given that :

x = -4

The absolute value is the distance from zero. The absolute value is always positive.

| x | = | -4 | = 4

The absolute value = distance from the zero.

a number line contains negative and positive number . number to the right side of zero is positive and to  the left side of zero is negative. Absolute value means how far the number is from zero.

Thus, If x = − 4,  number line shows the value of |x| is 4 tick mark to the left of zero.

To learn more about absolute value here

https://brainly.com/question/1301718

#SPJ1

The equilibrium composition of CO₂ is determined to be 0.59 kmol.

To solve this problem, we can use the ideal gas law and the equilibrium constant expression for the reaction:

CO + 1/2O₂ ⇌ CO₂

Given the initial number of moles of CO and O₂, we can set up an ICE (Initial, Change, Equilibrium) table. Let's assume that x kmol of CO is consumed and converted to CO₂. Then, the change in the number of moles for each species is:

CO: -x kmol

O₂: -0.5x kmol

CO₂: +x kmol

At equilibrium, the number of moles of CO is (2 - x) kmol, O₂ is (3 - 0.5x) kmol, and CO₂ is x kmol. The equilibrium constant expression can be written as:

Kp = (P_CO₂) / (P_CO * P_O₂(1/2))

Given Kp = 16.461 and the pressure conditions, we can substitute the equilibrium partial pressures into the expression:

16.461 = x / ((2 - x) * (3 - 0.5x)(1/2))

Solving this equation yields x ≈ 0.59 kmol.

Learn more about equilibrium here

https://brainly.com/question/30807709

#SPJ11

\(CH_3CH_2OH\) is a polar compound and has hydrogen bonding. It has a higher boiling point. It will have the lowest vapor pressure among the three compounds.

Vapor pressure is the pressure produced by the vapors of a liquid in a sealed container when the liquid is heated. It is a property of a liquid that describes the tendency of a liquid to evaporate. It is measured in units of pressure, typically in mmHg or torr. The higher the vapor pressure, the more volatile a compound is. So, the decreasing order of vapor pressure for the given compounds is: \(CH_3CH_3 > CH_3CH_2F > CH_3CH_2OH\)

Here, \(CH_3CH_3\) is a non-polar compound while \(CH_3CH_2F\) and \(CH_3CH_2OH\) are polar compounds. The polar compound has hydrogen bonding, which increases the intermolecular forces between molecules. As a result, the polar compound will have a lower vapor pressure than the non-polar compound.

To learn more about vapor pressure click here https://brainly.com/question/25715932

#SPJ11

The no of moles of diprotic acid that were titrated are 4.18 × 10-4 mol.

0.115 g of an unknown diprotic acid is titrated with 0.095 M NaOH. The first equivalence point occurred in the titration at a volume of 8.80 mL of NaOH added; the second equivalence point occurred at a volume of 17.60 mL of NaOH added.

To find out the number of moles of diprotic acid that were titrated in the reaction, it is important to use the formula, Moles = concentration x volume

The volume of NaOH used during the titration is obtained from the difference between the second and first equivalence points.

Volumes of NaOH used are as follows:

V1 = 8.80 mL, V2 = 17.60 mL

Volume of NaOH used for the titration = V2 - V1= 17.60 mL - 8.80 mL= 8.8 mL = 0.0088 L

The number of moles of NaOH used can be calculated as follows:

moles of NaOH = concentration x volume= 0.095 M x 0.0088 L= 8.36 × 10-4 mol

Each mole of NaOH reacts with two moles of diprotic acid to give two moles of NaOH. Therefore, the number of moles of diprotic acid that were titrated in the reaction is equal to half of the number of moles of NaOH.mol

diprotic acid = 1/2 x mol NaOH= 1/2 x 8.36 x 10-4 mol = 4.18 × 10-4 mol

Thus, the number of moles of diprotic acid that were titrated is 4.18 × 10-4 mol.

To learn more about equivalence point :

https://brainly.com/question/31389701

#SPJ11

Answer:

Yes

Explanation:

It does because of the fact that plants need water to live and the grow. Water helps the plant grow, and certain plants would need less or more water based on their roots, leaves, and tempurature tolerancy.

Answer:  Yes,

Roots need both water and oxygen, and when surrounded by water, they cannot take up oxygen.  Plants may slow in growth after a flush of new growth or a heavy flowering. During these periods and while it is dormant, a plant will need less water.  

An example which doesn't depict physical weathering is acid rain falling on limestone.

Physical weathering involves the breakdown of rock into smaller particles through physical processes such as friction between rocks as a result of wind blowing sand onto rocks, freeze-thaw in colder climates etc and it is usually reversible.

Chemical weathering on the other hand involves the  breakdown of rock into smaller particles through chemical processes or reaction  such as acid rain falling on limestone and it is usually irreversible.

Read more on https://brainly.com/question/16746784

Answer:

Yes a proton affects the mass of an atom.

Answer:

a

Explanation:

For various types of solvents, the effect of temperature on the enzyme kinetics and mass transfer coefficients varies.

What does this study reveal?

Learn more about Enzyme kinetics with the help of the given link:

https://brainly.com/question/28196334

#SPJ4

Answer:

\(\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}\)

A. Skin

Explanation:

Skin unlike teeth, bones & shells is fragile & get decomposed easily under the soil.

Answer:

um a I think because when you look at dinosaur you don't see their skin anymore just like the bones and teeth

Answer: A chemical formula is a combination of symbols which represents the composition of a compound. Formulas often contain numerals to indicate the proportions in which the elements occur within a compound. For example, we have learned from experiments that water is composed of the elements hydrogen and oxygen.

Explanation:

Answer:

body energy

Explanation: because  you are running it is taking ur energy

Answer:

it means that the two opposing reactions run on equal rates hence there is no net change

it means that the two opp2r

True.Dispersion forces are a type of intermolecular force that arises from the fluctuation of electron distribution within a molecule.

These forces become stronger as the size of the molecule increases, since larger molecules have more electrons and thus can create larger instantaneous dipoles. However, the strength of dispersion forces is also dependent on the shape of the molecule and the distance between molecules. In some cases, a smaller, more compact molecule may have stronger dispersion forces than a larger, more elongated molecule. Additionally, the polarizability of a molecule, or its ability to undergo distortion of electron density in the presence of an electric field, can also affect the strength of dispersion forces. Therefore, while molecular weight is a factor in determining the strength of dispersion forces, it is not the only determining factor.Dispersion forces, also known as London forces, are a type of intermolecular force that occurs between molecules that have temporary dipoles. These temporary dipoles arise due to fluctuations in electron density within the molecule, which can create regions of partial positive and negative charge. The strength of dispersion forces is directly related to the polarizability of the molecule, which is a measure of how easily the electron cloud can be distorted.

While it is generally true that dispersion forces become stronger as molecules become more polarizable, this is not always the case. The molecular weight of a molecule can also play a role in determining the strength of dispersion forces. For very large molecules, the distance between electrons in different regions of the molecule can be significant, which can lead to a decrease in polarizability and a weaker dispersion force. On the other hand, for very small molecules, the distance between electrons is small and polarizability can be limited. In these cases, the strength of the dispersion force may not increase significantly with increasing molecular weight.

Learn more about intermolecular here:

https://brainly.com/question/9007693

#SPJ4

Answer:

Explanation:

2,4 di methyl means that there are 2 methyl groups on the 2 and 4 carbons. hexane means there are 6 carbons in total for the carbon chain

first pic

3,3 diethyl means there are 2 ethyl groups on the 3 carbon chain. 4 mthyl means 1 methyl group on the 4 carbon chain, 5 propyloctane means that there are 1 propylo on the 5 carbon chain. and that the carbon chain is a octane meaning 8 carbons.

second pic

A titration is an experiment where a volume of a solution of known concentration is added to a volume of another solution in order to determine its concentration. Many titrations are acid-base neutralization reactions, though other types of titrations can also be performed.Aug 12,

Fluorine is the most reactive halogen. Because fluorine has the smallest radius and most electronegative character.

The most reactive halogen is Fluorine. It is the most electronegative element that is bonded to any other element it will withdraw electron density towards its own core. This property has measured by Pauling electronegativity scale. It changes the reactivity and properties of fluorine containing molecules. These materials are used as non-fluorinated ones. Due to the high reactivity property, fluorine almost never appears in its free form. This is found in the reduced form as fluoride (F−) in compounds like fluorspar (CaF2), cryolite (Na3AlF6).

To learn more about Fluorine please visit:

https://brainly.com/question/15045637

#SPJ4

We need 1.68 L of concentrated (14.7 M) phosphoric acid to prepare 25.0 L of 3.0 M H3PO4.

To prepare 25.0 L of 3.0 M H3PO4, we can use the formula:

M1V1 = M2V2

Where M1 = concentrated phosphoric acid (14.7 M)

V1 =  (the volume of concentrated phosphoric acid needed)

M2 = 3.0 M

V2 => 25.0 L

We can solve for V1 by substituting the values into the formula and rearranging:

V1 = (M2V2) / M1

V1 = (3.0 M * 25.0 L) / 14.7 M

V1 = 1.68 L

So, we need 1.68 L of concentrated (14.7 M) phosphoric acid to prepare 25.0 L of 3.0 M H3PO4.

Learn more about Phosphoric Acid here:

https://brainly.com/question/3700851

#SPJ4

A competitive inhibitor is a type of enzyme inhibitor that binds to the active site of the enzyme and competes with the substrate for binding.

As a result, the competitive inhibitor can increase the apparent Michaelis-Menten constant (Km) of the enzyme.

Km is a measure of the affinity of the enzyme for its substrate. A higher value of Km indicates a lower affinity of the enzyme for the substrate, which means that the enzyme requires a higher concentration of the substrate to reach half of its maximum reaction rate (Vmax).

When a competitive inhibitor is present, it decreases the affinity of the enzyme for its substrate by occupying the active site and preventing the substrate from binding.

This means that a higher concentration of the substrate is required to overcome the inhibition caused by the competitive inhibitor, which leads to an increase in the apparent Km.

In other words, a competitive inhibitor increases the Km because it makes it more difficult for the substrate to bind to the enzyme.

The effect of the competitive inhibitor on Vmax depends on the concentration of the inhibitor relative to the concentration of the substrate.

If the concentration of the inhibitor is high enough to completely saturate the active site, it can decrease the Vmax by preventing the substrate from binding to the enzyme.

However, if the concentration of the inhibitor is low, the effect on Vmax may be minimal, as the substrate can still bind to the enzyme and reach the maximum reaction rate.

to know more about competitive inhibitors refer here:

https://brainly.com/question/31192076#

#SPJ11

Covalent bonding is similar to ionic bonding, except there are no high-electronegativity atoms present to accept any electrons that the present atoms are willing to donate.

Covalent bonding is a type of bonding that occurs when two atoms share electrons. It takes place between atoms of similar electronegativity, meaning they have the same attraction for electrons, and occurs when the atoms’ orbitals overlap in a stable electronic configuration. This overlap allows electrons to be shared between the two atoms in equal proportions and binds them together, forming a covalent bond.

This is in contrast to ionic bonding, where one atom has a higher electronegativity and is able to accept electrons from the other with a lower electronegativity. Thus, covalent and ionic bonds tend to form between atoms of different electronegativities.

In covalent bonding, there are no polar molecules or ions, meaning there is no charge difference between atoms. It’s also much stronger than ionic bonding, because the shared electrons are held more tightly by the atoms due to the attractive forces between them.

know more about electrons here

https://brainly.com/question/12001116#

#SPJ11

The statement that can replace the question mark is that the mutations would change with each generation.

The term mutation has to do with the changes that occurs in the genes of organisms. We have to note that mutations are caused by an alteration of the normal sequence of the proteins in the genes. There are several factors that could lead to the mutation of a gene and one of the factors that could lead to the mutation of a gene is the fact that the larva has been exposed to radiation.

We have to note that when we expose the larva to radiation, there would be a change in the genes and it is possible that this change in the structure of the genes could be passed on from one generation to the next hence the possibility that the kind of mutation would vary or change in each generation.

Learn more about mutation:https://brainly.com/question/13923224

#SPJ1

When a metal and a nonmetal react, the metal tends to lose electrons and the nonmetal tends to gain electrons.

Elements are classified as metals or nonmetals, and it is critical to understand whether an element is a metal or a nonmetal. Metals (such as copper and aluminum) conduct heat and electricity well, whereas nonmetals (such as phosphorus and sulfur) are insulators.

Metals participate in chemical reactions and lose electrons, resulting in positively charged ions, whereas nonmetals accept electrons, resulting in negatively charged ions.

Thus, When a metal and a nonmetal react, the metal tends to lose electrons and the nonmetal tends to gain electrons.

To learn more about the metal and non metal, follow the link;

https://brainly.com/question/29400906

#SPJ1

Answer: from a gas to a liquid

Explanation:

I passed the test