a sample of sand has a mass of 51.1 g and a volume of 29.7 cm3 . calculate its density in grams per cubic centimeter ( g/cm3 ).

The simplest proportion of the components of a molecule is shown in an empirical chemical formula instead of the overall amount of atoms within the molecule.

Primary constituent of a whole. refers to a straightforward substance that can't be divided into smaller components or transformed into another substance in chemistry. An atom, which is made up of protons, neutrons, and electrons, is the fundamental unit of an element. An element's atoms all contain the same number atomic protons.

The smallest component of an object that cannot be destroyed chemically. The centre of every atom is called the nucleus, and it is made up of neutrons and protons. The nucleus is filled with electrons, which are negative particles.

To know more about element visit :

https://brainly.com/question/13025901

#SPJ4

Answer:

yes

Explanation:

because the atmosphere is the shield of earth

The energy released when adding an electron is the energy released in the atomization reaction. This energy is called electron affinity. The electron affinity of Si is 133.6 KJ/mol.

Electron affinity of an atom is its tendency to capture an electron from other atoms towards its nucleus. The more the electron affinity the more will be its reactivity.

The minimum energy required to remove a loosely bound electron from the valence orbital is called its ionization energy. In the given reaction, silicon is accepting an electron to form its atomic state. Thus, it is releasing the energy.

This energy released during gaining one electron is equal to the electron affinity of silicon that is 133.6 kJ/mol.

Find more on electron affinity:

https://brainly.com/question/14135172

#SPJ1

The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride. This polymer will form between layers of the solutions. To remove the nylon, one can choose to dissolve it in the 5% hexamethylenediamine or in the 5% adipoyl chloride.

Nylon, a synthetic polymer, is produced from the combination of adipoyl chloride and hexamethylenediamine. This process is called the synthesis of nylon. Nylon is a highly flexible material that is resistant to wear and tear, as well as chemical and heat degradation. The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride, respectively, for the two reactants to be mixed together.

The reaction between these two chemicals is exothermic, which means that it releases heat. The heat generated in the reaction drives the reaction forward, resulting in the formation of nylon. The chemical formula for nylon is (-CO-NH-)n, where n is a large number that reflects the degree of polymerization. To remove the nylon, it is soaked in an acid solution. The acid dissolves the nylon, separating it into its constituent components, which can then be purified and reused.

The most commonly used acid for this process is hydrochloric acid. The process of removing nylon from its solvent is called the "acid-catalyzed hydrolysis of nylon." Nylon is used in a variety of applications, including textiles, packaging materials, and electrical components, among others. Its properties make it ideal for use in applications that require durability, strength, and flexibility. Nylon's physical properties, including its resistance to heat and chemical degradation, make it ideal for use in applications such as electrical insulation, packaging materials, and textiles.

Know more about  nylon   here:

https://brainly.com/question/25835424

#SPJ8

The ultimate electron acceptor in the fermentation of glucose to ethanol is an organic molecule called acetaldehyde.

During the fermentation of glucose to ethanol, the process occurs in the absence of oxygen, known as anaerobic conditions. In this process, glucose is metabolized by yeast or other microorganisms, converting it into ethanol and carbon dioxide.

The initial step in glucose fermentation involves the breakdown of glucose into two molecules of pyruvate through a series of enzymatic reactions known as glycolysis. This process occurs in the cytoplasm of the cell and produces a small amount of ATP.

Following glycolysis, pyruvate is further metabolized into ethanol and carbon dioxide. This step occurs in the mitochondria of yeast cells or the cytoplasm of other microorganisms.

In this step, pyruvate is first converted into acetaldehyde by an enzyme called pyruvate decarboxylase. This reaction involves the removal of a carbon dioxide molecule from pyruvate, resulting in the formation of acetaldehyde.

Next, acetaldehyde is reduced to ethanol by an enzyme called alcohol dehydrogenase. In this reaction, acetaldehyde accepts electrons and hydrogen ions (H+) from the NADH molecule, which is formed during glycolysis. As a result, NADH is oxidized to NAD+ while acetaldehyde is reduced to ethanol.

In the fermentation of glucose to ethanol, acetaldehyde acts as the ultimate electron acceptor. It accepts electrons and hydrogen ions from NADH, leading to the conversion of acetaldehyde to ethanol. This process allows for the regeneration of NAD+ and the continuation of glycolysis, enabling the production of ATP through anaerobic metabolism.

To know more about glycolysis visit:

https://brainly.com/question/1966268

#SPJ11

Answer: The solubility of this compound in pure water is 0.012 M

Explanation:

Solubility product is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as \(K_{sp}\)

The equation for the ionization of the  is given as:

\(Ca(OH)_2\rightarrow Ca^{2+}+2OH^-\)  

By stoichiometry of the reaction:

1 mole of  \(Ca(OH)_2\) gives 1 mole of \(Ca^{2+}\) and 2 mole of \(OH^-\)

When the solubility of  \(Ca(OH)_2\) is S moles/liter, then the solubility of \(Ca^{2+}\)  will be S moles\liter and solubility of \(OH^-\) will be 2S moles/liter.

\(K_{sp}=[Ca^{2+}][OH^{-}]^2\)

\(6.5\times 10^{-6}=[S][2S]^2\)

\(S=0.012M\)

Thus solubility of this compound in pure water is 0.012 M

Answer:

3rd image

Explanation:

0.01 M NaCl solution will have the highest freezing point

Freezing point will be given by the formula:

ΔT(f) = iK(f).m

where, m = molality

Sucrose is non-electrolyte and so i = 1

NaCl → Na+ + Cl−

Thus i = 2

Na2SO4 → 2Na+ + SO4^2−

Thus i = 3

The highest freezing point will be of the solution having the lowest ΔT(f) value.

As option B has least value of both i and m, 0.01M NaCl has lowest

ΔT(f) = K(f) × (0.02)

Therefore, 0.01 M NaCl solution will have the highest freezing point.

Learn more about Freezing point here:

https://brainly.com/question/40140

#SPJ4

Answer:

0.01 M NaCl is the answer

Yes, the position of the hydroxyl group does have an effect on the wavelength of light absorbed by the dyes synthesized from a naphthol starting material.

This is because the position of the hydroxyl group determines the electronic properties of the molecule, which in turn affects the energy levels and transitions that occur when the molecule absorbs light. In general, molecules with hydroxyl groups attached to positions closer to the aromatic ring will absorb light at shorter wavelengths (higher energy), while those with hydroxyl groups attached to positions farther from the ring will absorb light at longer wavelengths (lower energy).

This phenomenon is known as the bathochromic or hypsochromic effect, depending on whether the shift is toward longer or shorter wavelengths, respectively.

To learn more about bathochromic or hypsochromic effect, here

https://brainly.com/question/14083655

#SPJ4

Each isotope's relative importance is indicated by its percent abundance. Element X has an average relative atomic mass of 220.4.

Compare the provided isotopes to the weighted average on the periodic table to identify the isotopic form of an element that is the most prevalent. The three hydrogen isotopes, for instance, are H-1, H-2, and H-3. Around 1.008 amu is the weighted average of hydrogen's atomic mass ( look again at the periodic table).

This details are not provided here. Therefore, we shall use the protons' number as the atomic number. The correct response is therefore 17.

To know more about isotopes visit:-

https://brainly.com/question/12955625

#SPJ4

Answer:

In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You can't change one element into another in a chemical reaction — that happens in nuclear reactions.

Explanation:

Explanation:

Thus, reactions in which products can be converted to reactant is called Reversible reaction.

Explanation:

i found this hope it helps

The covalent compounds among the options provided are:

H₂S (Hydrogen sulfide)

LiH (Lithium hydride)

C₂H₂ (Acetylene)

Covalent compounds are chemical compounds formed by the sharing of electrons between atoms. In a covalent bond, two or more nonmetal atoms share one or more pairs of electrons in their outermost energy levels. This shared electron pair creates a strong bond that holds the atoms together.

Covalent compounds are formed when atoms share electrons, typically between nonmetals. Calcium chloride (CaCl₂) and potassium nitrate (KNO₃) are ionic compounds, while lithium hydroxide (LiOH) is an ionic compound as well but contains some covalent character due to the polar nature of the hydroxide (OH⁻) ion.

Learn more about Covalent compounds from the link given below.

https://brainly.com/question/11632372

#SPJ4

Answer:

a: milliliters and grams | b: heat | c: force | d: solid | e: attraction

Explanation:

A: milliliters are cubic and grams are weight.

b: heat make particles go faster

c: thus more collisions and temperature and force

d: solid, they can't move, just vibrate

e: attraction

Explanation:

The most common hot dipping process for industrial applications is galvanizing, which refers to the coating of zinc over iron or steels for rust proofing. It is an extremely versatile and easy means of providing corrosion protection for construction materials exposed to atmospheric conditions

The density of oil is 0.55 g/mL
To determine the density of the oil, first calculate the mass of the oil alone by subtracting the mass of the empty beaker from the total mass: 100 grams (total mass) - 45 grams (empty beaker mass) = 55 grams (mass of oil).

Now, use the formula for density, which is:

Density = Mass / Volume

In this case:

Density of oil = 55 grams (mass of oil) / 100 milliliters (volume of oil) = 0.55 g/mL.

So, the density of the oil is 0.55 g/mL.

To know more about density:

https://brainly.com/question/1354972

#SPJ11

Answer:

B

Explanation:

selective breeding and only breeding the trees that produce the most oranges

The common ion effect is the phenomenon in which the addition of an ion common to two solutes reasons precipitation or reduces ionization. The common ion effect implicates a solution that has two solutes with identical ions.

The common ion effect is a mode to comprehend how the various ions affect the solubility and ionization of different molecules in a solution. The addition of a common ion, or an ion transferred between solutes, to a solution will inflate precipitation, or decline solubility or ionization of that particular molecule. The solubility of a solute decreasing is named the net effect. An example of the common ion effect can be followed when gaseous hydrogen chloride is enacted through a sodium chloride solution, directing to the precipitation of the NaCl due to the surplus of chloride ions in the solution.

To learn more about common ion effect visit here:

https://brainly.com/question/16935336

#SPJ4

Answer:

Concept of chemi-fluorescence

Explanation:

A glow stick usually consists of two chemicals in a larger plastic tube: , a base catalyst (mostly sodium salicylate), and a suitable dye (sensitizer, or fluorophor). This creates an exergonic reaction when mixed together.

When a glow stick is bent, the flurophor which is a chemical that easily re-emits light upon excitation in smaller capsules is released into the other substance, there by causing it to emit radiation/light in the uv-visible region. The brightness and longevity of the glow stick is determined by varying the concentration of these chemicals.

I hope this explanation clarifies things.

They change the composition of matter to change the properties of matter.

There is matter all around you. All matter is made up of very small particles, including atoms and molecules. The objects you see and touch on a daily basis were constructed from those atoms. Anything that has mass and occupies space (has volume) is considered matter.

The quantity of matter in an item is its mass. A statue made of lead (Pb) or another little object with a lot of mass may be present. You might have a massive object with a small mass.

Additionally, you ought to be aware of the distinction between matter and weight. Weight is a measure of gravity's pull, whereas mass is a measure of the substance of an object.

Thus, They change the composition of matter to change the properties of matter.

Learn more about matter, refer to the link:

https://brainly.com/question/4513444

#SPJ1

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{2.3 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.3}{6.02} \\ = 0.382059...\)

We have the final answer as

Hope this helps you

Answer:

a) acidic; [H+] = 10^-2.5 = 3 x 10^-3

b) basic; [H+] = 10^-11.7 = 2 x 10^-12

c) slightly acidic (almost neutral); [H+] = 10^-6.8 = 1.6 x 10^-7

d) acidic; [H+] = 10^-3.31 = 4.9 x 10^-4

Explanation:

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

[H+] = 10^-pH

A is acidic, B is basic, C is slightly acidic, and D is acidic.

What is pH?

pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

a) Acidic; [\(H^+\)] = \(10^-^2^.^5\) = \(3 X 10^-^3\)

b) Basic; [\(H^+\)] = \(10^-^1^1^.^7\) = \(2 X 10^-^1^2\)

c) Slightly acidic (almost neutral); [\(H^+\)] = \(10^-^6^.^8\)= \(1.6 X 10^-^7\)

d) Acidic; [\(H^+\)] = \(10^-^3^.^3^1\)= \(4.9 X 10^-^4\)

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

Hence, a is acidic, b is basic, c is slightly acidic, and d is acidic.

Learn more about the pH of the solution here:

https://brainly.com/question/15231899?

#SPJ2

Pyridinium tribromide acts as a bromine source, facilitating the bromination reaction by providing bromine atoms for the substitution of hydrogen atoms in trans-cinnamic acid.

Trans-cinnamic acid bromination requires pyridinium tribromide (\(Py\)·\(Br_3\)). It supplies bromine atoms for the bromination reaction.

Pyridinium tribromide is a moderate, selective brominating agent. It introduces bromine atoms at certain aromatic ring locations with trans-cinnamic acid.

Pyridinium tribromide transfers a bromine atom to the double bond of trans-cinnamic acid, forming the brominated product. Bromination can replace a hydrogen atom on the benzene ring with a bromine atom. Pyridinium tribromide provides regulated bromination of trans-cinnamic acid, allowing chemists to deliberately change specific sites and produce desired brominated derivatives for study or organic synthesis.

Learn more about bromination, here:

https://brainly.com/question/28938775

#SPJ4

Answer:

1.45 is larger for density

The units for the rate constant of a reaction with the rate law, Rate = k[A][B], are given by M⁻¹s⁻¹.

In the rate law equation, Rate = k[A][B], the rate constant (k) represents the proportionality constant that relates the concentrations of reactants ([A] and [B]) to the rate of the reaction. The rate constant depends on the specific reaction and is determined experimentally.

To determine the units of the rate constant, we need to analyze the units of the rate and the concentrations of the reactants. In the given rate law equation, the rate is expressed in terms of concentration per unit time (M/s or mol/(L·s)).

The concentration of reactant A is represented by [A], which has units of M (molarity) or mol/L. Similarly, the concentration of reactant B is represented by [B] and also has units of M or mol/L.

By substituting the units into the rate law equation, we can deduce the units of the rate constant. The rate is given in M/s, and the concentrations [A] and [B] are in M. Therefore, the units of the rate constant k must cancel out the units of concentration, resulting in M⁻¹, and also account for the unit of time, which is s⁻¹.

Therefore, the correct answer for the units of the rate constant of a reaction with the given rate law is M⁻¹s⁻¹, which corresponds to option C.

To learn more about rate - brainly.com/question/30787205

#SPJ11

Answer:

Cr2O3

Explanation:

To find the empirical formula, which is the smallest whole number ratio of a compound, the following is done:

68.4% Cr = 68.4g of Chromium

31.6% O = 31.6g of Oxygen

Since, Cr = 52, O = 16, divide each mass by their respective atomic mass to convert to moles.

Cr = 68.4/52 = 1.315 mol

O = 31.6/16 = 1.975 mol

- Next, we divide each mole value by the smallest value (1.315mol)

Cr = 1.315/1.315 = 1

O = 1.975/1.315 = 1.50

The ratio or Cr to O is 1:1.5

We multiply this ratio by 2 to get the whole number ratio as follows:

2 × 1: 2 × 1.5

2:3

Hence, the empirical formula of Cr and oxygen is Cr2O3.