example of physical property

Answer:

Saponification

Explanation:

When treated with a base such as NaOH, the ester is transformed back to alcohol and the sodium salt of carboxylic acid. Saponification is the name given to the reaction since it is utilized in the production of soap.

Answer:

true

Explanation:

as you get closer to the center it gets hotter

There are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the number of moles in the substance by its molecular mass.

However, given that the number of molecules in calcium hydroxide is 4.07 x 10¹⁵molecules, we need to calculate the number of moles in Ca(OH)2 as follows:

no. of moles of Ca(OH)2 = 4.07 x 10¹⁵ ÷ 6.02 × 10²³

no. of moles = 0.676 × 10-⁸

no. of moles = 6.76 × 10-⁹ moles.

Molar mass of Ca(OH)2 = 74.093 g/mol

Mass of Ca(OH)2 = 74.093 × 6.76 × 10-⁹ moles

Mass = 5.01 × 10-⁷grams.

Therefore, there are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.

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Volume is the amount of space taken up by an object

The instrument used to measure liquid volume is called a graduated cylinder.

The formula used to calculate the volume of a solid object such as a rectangular prism is: V =  length, *  width * height

Volume is a measure of the amount of space that a substance or object occupies. It is typically measured in units such as liters, cubic meters, gallons, or cubic feet.

The instrument used to measure liquid volume is called a graduated cylinder. It is a cylindrical tube made of glass or plastic, with volume markings along its length that allow for the accurate measurement of liquids.

The formula used to calculate the volume of a solid object depends on its shape. Here are some common formulas for finding the volume of different types of solid objects:

Cube: V = s³ (where s is the length of one side of the cube)

Rectangular prism: V =  length, *  width * height

Sphere: V = 4/3πr³ (where r is the radius of the sphere)

Cylinder: V = πr^2h (where r is the radius of the cylinder and h is its height)

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Answer:

Cobalt;nitrite

Explanation: there is none that is the compound

Answer:

CoNO2 is an ionic compound and is composed of cobalt cation (having +2 valency) and nitrite anion.

Explanation:

The chemical formula of cobalt cation is Co2+ and the formula of nitrite ion is NO−2 . When writing the name of an ionic compound, the name of the cation is written first and then the name of the anion. So, the name of CoNO2 is Cobalt (II) Nitrite.

Answer:

Melting point, boiling point, state of matter at room temperature, heat of vaporization, flammability and reactivity

Explanation:

Answer:

I would say the top one but im not confident in the answer

Answer:

A

Explanation:

A

Answer:OH^- ion

Explanation: When LiOH added in water then LiOH dissociated in Li+ and OH- . Water is a composition of H+ and OH- ions hence concentration of OH- ions will be increased after adding LiOH.

Answer:

The reaction is nutride-cullic and sees all math about our lives.

Explanation:

this is the answer to ur question hope is helpful

2gcm³ is the density of a glass fragment that has a mass of 1.5g and a volume of 0.75mL.

The term density is define as the ratio of mass and volume. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimeter.

Density = mass / volume

Given:

Density = ?

Mass = 1.5 gram

Volume = 0.75 ml

By substituting this values in give equation we get,

Density = 1.5 / 0.75

= 2 gcm³

Thus, 2 gcm³ is the density of a glass fragment that has a mass of 1.5g and a volume of 0.75mL.

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Answer: Two effects may occur during high current flow: 1) the wire may become overheated to the point that surface oxidation or even evaporation may take place, 2) at the connection points at each end of the wire, especially if the terminations are of a different type of metal than the wire, some atoms may migrate into or out of the wire.

ANSWER Since 1.0 × 10 -7 has two significant figures, the pH can be reported as 7.00. A logarithmic scale condenses the range of acidity to numbers that are easy to use. Consider a solution with [H + ] = 1.0 × 10 -4 M. That is a hydrogen-ion concentration that is 1000 times higher than the concentration in pure water.

The addition of hydrofluoric acid and Sodium Fluoride to water produces a buffer solution.

A buffer solution is a solution that resists changes in pH when small amounts of an acid or base are added to it. A buffer solution is a solution that is able to maintain a relatively constant pH despite the addition of an acidic or basic solution.

Buffer solutions are made when a combination of a weak acid and its conjugate base, or a weak base and its conjugate acid is done. When these are mixed together in the right proportions, they form a solution that resists changes in pH when small amounts of acid or base are added to it.

Therefore, when hydrofluoric acid and Sodium Fluoride mixes together with water, it forms a Buffer solution.

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Answer:

A) \({MnO_4}^- + 3 H^+ + \frac{5}{2} H_2O_2 \rightarrow Mn^{2+} + 4 H_2O + \frac{5}{2} O_2 \)

B) 7.5 molar

Explanation:

A) Reduction

\({MnO_4}^- + 8 H^+ + 5e^- \rightarrow Mn^{2+} + 4 H_2O\)

Oxidation

\(H_2O_2 \rightarrow O_2 + 2 H^+ + 2e^-\)

Multiplying the oxidation reaction by 5/2 and adding it to the reduction equation:

\({MnO_4}^- + 8 H^+ + 5e^- \rightarrow Mn^{2+} + 4 H_2O\)

+

\(\frac{5}{2} H_2O_2 \rightarrow \frac{5}{2} O_2 + 5 H^+ + 5e^-\)

-----------------------------------------------------------------------------------------------------

\({MnO_4}^- + 3 H^+ + \frac{5}{2} H_2O_2 \rightarrow Mn^{2+} + 4 H_2O + \frac{5}{2} O_2 \)

B) 10 ml = 0.01 L

20 ml = 0.02 L

mol of MnO4− = molarity*volume = 1.5*0.02 = 0.03

1 mol of MnO4− reacts with 5/2 mol of H2O2, then:

mol of H2O2 = 0.03*5/2 = 0.075

molarity = mol/volume = 0.075/0.01 = 7.5 molar

Answer:

An equal number of atoms must be on both sides of the equation.

Explanation:

Answer:

B

Explanation:

I think this is right

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The pH of the solution after 13.2 mL of barium hydroxide has been added is 13.69. The volume of the hydrocyanic acid solution is 26.5 mL, which is 0.0265 L.

The balanced equation for the reaction between hydrocyanic acid and barium hydroxide is:

2 HCN + Ba(OH)2 → Ba(CN)2 + 2 H2O

This reaction is a neutralization reaction, which means that the number of moles of acid is equal to the number of moles of the base at the equivalence point. We can use this information to calculate the number of moles of barium hydroxide that have reacted with the hydrocyanic acid.

n(Ba(OH)2) = M(Ba(OH)2) x V(Ba(OH)2)

where M(Ba(OH)2) is the molarity of the barium hydroxide solution and V(Ba(OH)2) is the volume of barium hydroxide solution added.

Using the given values, we have:

n(Ba(OH)2) = 0.489 mol/L x 0.0132 L

= 0.00646 mol

Since the stoichiometry of the reaction is 2:1 for HCN to Ba(OH)2, the number of moles of HCN that have reacted is half the number of moles of Ba(OH)2:

n(HCN) = 0.5 x n(Ba(OH)2)

= 0.5 x 0.00646 mol

= 0.00323 mol

The volume of the hydrocyanic acid solution is 26.5 mL, which is 0.0265 L. Thus, the initial concentration of hydrocyanic acid is:

M(HCN) = n(HCN) / V(HCN)

= 0.00323 mol / 0.0265 L

= 0.122 M

At the equivalence point, all of the hydrocyanic acids have reacted, so the concentration of hydroxide ions (OH-) in the solution is equal to the concentration of barium hydroxide:

[OH-] = M(Ba(OH)2) = 0.489 M

The hydrocyanic acid dissociates in water to form hydrogen cyanide and hydronium ions (H3O+):

HCN + H2O ⇌ CN- + H3O+

The equilibrium constant expression for this reaction is:

Ka = [H3O+][CN-] / [HCN]

The value of Ka for hydrocyanic acid is 4.9 x 10^-10.

At the equivalence point, all of the hydrocyanic acids have reacted, so the concentration of hydrogen cyanide and hydronium ions is zero. The concentration of hydroxide ions can be used to calculate the concentration of hydronium ions using the equation:

Kw = [H3O+][OH-]

where Kw is the ion product constant for water, which has a value of 1.0 x 10^-14 at 25°C.

Rearranging the equation gives:

[H3O+] = Kw / [OH-]

= 1.0 x 10^-14 / 0.489

= 2.04 x 10^-14 M

Taking the negative logarithm of this value gives:

pH = -log[H3O+]

= -log(2.04 x 10^-14)

= 13.69

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A chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

The process of joining two or more atoms or molecules to form a single product is known as a chemical reaction. These reactions can be divided into two categories: combination and decomposition reactions.

During the process of condensation reaction a small molecule is eliminated as a byproduct, such as water or alcohol.

The condensation reaction can be utilized to create a variety of polymers by joining smaller monomers together into more complex molecules.

This reaction can be utilized to create peptide bonds between amino acids in proteins, ester bonds between carboxylic acids and alcohols, and glycosidic bonds between sugars, for example.

In addition to the condensation reaction, there are other types of chemical reactions.

For example, Hydrolysis, decomposition, single displacement, double displacement, acid-base, redox, and oxidation reactions are all examples of different types of chemical reactions.

In summary, a chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

This process is used to create a variety of polymers by joining smaller monomers together into more complex molecules.

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Explanation:

n=,4.5 moles C2H6

the ratio 2:7

4.5:x

x=15.75 moles

Answer: In the reaction 2H2S + 3O2 → 2H2O + 2SO2, the oxidation state of sulfur changes from -2 in H2S to +4 in SO2. This means that sulfur is oxidized, and oxygen is reduced.

Explanation:

The oxidation state of an element is the number of electrons that an atom loses or gains when it forms a chemical bond. In H2S, the sulfur atom has an oxidation state of -2 because it has lost two electrons to the hydrogen atoms. In SO2, the sulfur atom has an oxidation state of +4 because it has gained four electrons from the oxygen atoms.

The oxidation state of oxygen changes from 0 in O2 to -2 in H2O and SO2. This means that oxygen is reduced, and sulfur is oxidized. In O2, the oxygen atoms are not bonded to any other atoms, so they have an oxidation state of 0. In H2O and SO2, the oxygen atoms have an oxidation state of -2 because they have gained two electrons from the hydrogen and sulfur atoms, respectively.

Element Oxidation state in H2S         Oxidation state in SO2        Oxidation state in H2O

Sulfur                      -2   +4       +4

Oxygen                       0   -2       -2

Hydrogen              +1   +1       +1

Answer: The reaction is so aggressive, since there is no combination of water and oil. When the water is poured into the beaker of burning oil, it falls to the bottom and, due to the extreme heat, it vaporizes into steam almost instantaneously. ... This oxygenates the oil and produces a massive blaze.

Explanation:

Hope This Helps!!! : )

The equilibrium constant : Kc=[CO₂]

The equilibrium constant is the value of the product in the equilibrium state of the substance in the right (product) divided by the substance in the left (reactant) with the exponents of each reaction coefficient  

The equilibrium constant is based on the concentration (Kc) in a reaction  

pA + qB -----> mC + nD  

\(\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}\)

Solid (s) and liquid (l) are not included in the calculation of Kc(only aq-aquoeus and g-gas)

From reaction

CaCO₃(s)⇔CaO(s)+CO₂(g)

Because CaCO₃ and CaO are solid, only CO₂ is included in the calculation

\(\tt Kc=[CO_2]\)

\(\huge \boxed{\sf C}\)

Conduction: Heat transfers into hands when holding a hot cup of coffee. Heat energy is transferred between or inside substances by conduction. We can use any media for conduction, but physical media is required.

The kind of thermal energy transfer that warms your hand when you hold a hot mug of tea is called conduction. The correct option is C.

Direct contact between molecules inside a substance allows for the transfer of energy, typically in the form of heat and/or electricity. Conduction can occur in gases, liquids, and solids.

Conduction heat transfer primarily takes place in stationary mediums, including solids or fluids that are at rest.

When holding a hot cup of coffee, heat is transferred to the hands. Conduction is the method of transferring heat energy inside or between materials. Any medium can be used for conduction, although physical mediums are necessary.

Therefore, the correct option is C. Conduction is correct for the process mentioned above.

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