a housewife used the aluminum can to keep vinegar. After sometime, it is found that the vinegar is spoiled. Give a reason.​

The bolded portion contains an error. The correct correction should be: "This is the seasons."

The bolded portion contains an error. The correct correction should be: "This is the seasons."

The word "the" should be removed in order to have proper grammar. The corrected sentence would read: "This is seasons."

The word "the" is unnecessary in this context, as it does not add any meaning to the sentence.

The corrected version is concise and grammatically correct.

Learn more about bolded portion

brainly.com/question/29176202

#SPJ11

Answer:

What make Boron Boron is that it has 5 protons, and will therefor have 5 electrons in the unionized state. While I was looking this up I learned that there are two stable isotopes, Boron 10 with five neutrons, and boron 11 with six. The more common is boron 11, which is 80.1% of naturally occuring boron.

Answer:

C

Explanation:

The chemical reaction 2 H₂(g)+O₂(g)—->2 H₂O(l)+571.8 kJ is an exothermic reaction as heat is released during the reaction.

An exothermic reaction is defined as a chemical reaction which involves release of energy in the form of light,heat .In these reactions, energy is transferred from system to surroundings rather than taking energy from surroundings into system as in endothermic reactions.

In an exothermic reaction,change in enthalpy is negative.Therefore, it can be inferred that net amount of energy which is required to start the exothermic reaction is less than the net amount which is released by the reaction.

Examples of exothermic reactions are combustion reactions, detonation of nitroglycerin , neutralization reactions and nuclear fission.

Learn more about exothermic reactions,here:

https://brainly.com/question/10373907

#SPJ1

To make a buffer with pH 4.76 from 500 mL of 0.1 M solution of sodium acetate, you can add 25 mL of the 1 M solution of HCl to it.

According to the Henderson-Hasselbalch equation used for the calculation of buffer pH:

\(pH = pK_{a} + log\frac{[base]}{[acid]}\)
when the pH = pKa (as is here) then:

\(log\frac{[base]}{[acid]} = 0\)
so:
\(\frac{[base]}{[acid]}=1\)

This means that [base]=[acid]. The easiest way to generate acid here (because sodium acetate is the basic component), is to add strong acid to the solution, which will effectively transform sodium acetate into acetic acid.

The amount of acid needed is equal to half of the starting amount of sodium acetate:

c = n/V, so n = c * V = 0.1 M * 0.5 L = 0.05 mol of NaOAc

0.05 mol / 2 = 0.025 mol of HCl

In order to add the smallest volume of acid possible (so as to not reduce buffer capacity), we can use 1 M solution of HCl.

c = n/V, so V = n/c = 0.025 mol / 1 M = 0.025 L = 25 mL of 1 M HCl

You can learn more about buffers here:
brainly.com/question/3435382

#SPJ4

Answer:

B

Explanation:

Chemical reactions involve electron rearrangements. Nuclear reactions involve changes to the nucleus.

Answer:

B

Explanation:

We must use a solubility chart or graph specifically for NaNO3 to ascertain the solubility of NaNO3 in 250 grammes of water at 10°C. The amount of solute (NaNO3) that can dissolve in 100 grammes of water at a specific temperature is used to measure the solubility of NaNO3.

We may use a ratio to get the solubility in 250 grammes of water by assuming that the solubility of NaNO3 in water at 10°C is 90 grammes per 100 grammes of water:

90 g NaNO3 to 100 g water equals x g NaNO3 to 250 g water.

After cross-multiplying and finding x, we obtain:

250 grammes of water with 225 grammes of sodium nitrate equals x.

As a result, 250 grammes of water at 10°C can dissolve around 225 grammes of NaNO3.

The temperature at which 25 grammes of HCl will dissolve into a saturated solution in 50 grammes of water is required to answer the second question. Understanding how HCl dissolves in water at various temperatures is necessary for this.

The solubility of HCl in water is normally expressed in terms of grammes of solute per 100 grammes of water, despite the fact that it is a highly soluble molecule. The maximum concentration in mol/L at a specific temperature is typically supplied as an alternative.

Without specific solubility data, it is not possible to provide an accurate temperature at which 25 grams of HCl would create a saturated solution in 50 grams of water. Additional solubility information is needed to make a precise determination.

For more such question on solubility

https://brainly.com/question/13213061

#SPJ11

The pH of the solution containing 1.10×10⁻³ M HCl and 1.10×10⁻² M HClO₂ is approximately 1.29.

To calculate the pH, follow these steps:

1. Determine the concentration of H⁺ ions from each acid using their dissociation constants.
2. Add the concentrations of H⁺ ions to get the total concentration.
3. Calculate the pH using the formula pH = -log10[H⁺].

For HCl, a strong acid, the concentration of H⁺ ions is equal to its molarity (1.10×10⁻³ M). For HClO₂, a weak acid, use its Ka value (1.1×10⁻²) and an ICE table to find the equilibrium concentration of H⁺ ions (about 1.01×10⁻² M). Add the concentrations (1.10×10⁻³ M + 1.01×10⁻² M ≈ 1.12×10⁻² M) and calculate the pH (-log10(1.12×10⁻²) ≈ 1.29).

To know more about ICE table click on below link:

https://brainly.com/question/30395953#

#SPJ11

The statement a stable nucleus has a similar number of protons and neutrons is true about stable isotopes (Option D).

A radioactive isotope can be defined as a chemical element that emits energy in form of different types of radiation such as alpha radiation or beta radiation, which is due they are unstable in normal conditions.

Therefore, with this data, we can see that the radioactive isotopes are unstable and they can emit energy based on diverse types of radioactive emissions such as alpha rays and or beta rays.

Learn more about radioactive isotopes here:

https://brainly.com/question/18640165

#SPJ1

Answer:

1. Water can separate from salt solution by simple distillation

2. Simple distillation happens through a process heating and cooling liquids in order to separate the purify them, first, a liquid is heated producing a vapor, then, that vapor is cooled in a small tube called a condenser in order to form a separate liquid that liquid, sometimes referred to as the distillate, falls from the condenser into a separate container, the process works because it to liquids in the original vaporized a different point, meaning, the vapor that is created is comprised entirely of just one of the liquids in order for a simple work the 2 liquids boiling point must have been between at least 25 degrees Celsius about 77 degrees Fahrenheit

Explanation:

ig u can get info from the 2. to help u srry I don't feel like correcting my grammar but I hope that makes sense :)

A mutation from alanine to glycine can often lead to a very unstable protein. The reason for this instability can be attributed to the differences in the side chains of these two amino acids.

Alanine has a methyl (\(CH_3\)) side chain, while glycine has a hydrogen (H) side chain. The presence of the methyl group in alanine allows for more stable hydrophobic interactions within the protein structure, which contribute to the overall stability of the protein. In contrast, glycine's hydrogen side chain is unable to form these stabilizing hydrophobic interactions.

When a mutation occurs and alanine is replaced by glycine, the loss of the hydrophobic interactions can result in a less stable protein structure. This can lead to improper folding or increased susceptibility to denaturation, ultimately causing the protein to be unstable.

Learn more about proteins here: https://brainly.com/question/13653880

#SPJ11

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 5 × 200

We have the final answer as

Hope this helps you

Part A: Glucose (polar) Appropriate solvent: Water (H2O),Part B: Salt (ionic) Appropriate solvent: Water (H2O),Part C: Vegetable oil (nonpolar) Appropriate solvent: Hexane (C6H12),Part D: Sodium nitrate (ionic) Appropriate solvent: Water (H2O)

Hi! I'd be happy to help you choose appropriate solvents for each substance.

Part A: Glucose (polar)
Appropriate solvent: Water (H2O)
Explanation: Polar solvents dissolve polar substances. Water is a polar solvent and can dissolve glucose, which is also polar.

Part B: Salt (ionic)
Appropriate solvent: Water (H2O)
Explanation: Polar solvents are also effective at dissolving ionic substances. Water, being a polar solvent, can dissolve salt.

Part C: Vegetable oil (nonpolar)
Appropriate solvent: Hexane (C6H12)
Explanation: Nonpolar solvents dissolve nonpolar substances. Hexane is a nonpolar solvent and can dissolve vegetable oil, which is nonpolar.

Part D: Sodium nitrate (ionic)
Appropriate solvent: Water (H2O)
Explanation: Polar solvents can dissolve ionic substances. Water, as a polar solvent, can dissolve sodium nitrate.

learn more about ionic here

https://brainly.com/question/14614762

SPJ11

Answer:

Explanation:

The equilibrium constant expression for the given reaction is:

Keq = [Cl₂][PCI₃] / [PCl₃]

We are given the equilibrium constant (Keq) as 2.24 x 10^-2 at 327°C, as well as the initial concentrations of PCl₃ and PCI₃. We need to determine the equilibrium concentration of Cl₂.

Let's assume that the change in concentration of PCl₃ is -x, the change in concentration of Cl₂ is +x, and the change in concentration of PCI₃ is +x, at equilibrium. Then, the equilibrium concentrations are:

[PCl₃] = 0.235 - x

[Cl₂] = x

[PCI₃] = 0.174 + x

Substituting these expressions into the equilibrium constant expression, we get:

2.24 x 10^-2 = (x)(0.174 + x) / (0.235 - x)

Simplifying and rearranging this equation, we get a quadratic equation:

2.24 x 10^-2 (0.235 - x) = x (0.174 + x)

0.00526 - 2.24 x 10^-2 x = 0.174x + x^2

x^2 + 0.138x - 0.00526 = 0

We can solve this quadratic equation to find the value of x:

x = 0.046 M (rounded to 3 significant digits)

Therefore, the equilibrium concentration of Cl₂ is 0.046 M, which is the same as the change in concentration of Cl₂.

Since the equilibrium concentration of Cl₂ is greater than zero, this means that the products (Cl₂ and PCI₃) are favored at equilibrium.

Answer:

D. nose,trachea,bronchi,alveoli

Explanation:

sana po makatulong

Step 1

The reaction:

CaCO3 + heat => CaO + CO2 (completed and balanced)

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

Step 2

Information provided:

Actual yield = 0.53

The Ka of niacin can be calculated using the pH and concentration of the niacin solution as 5.9 × 10⁻⁹. Niacin is a weak acid. Thus, the correct option is A.

The acidity constant of a weak acid is known as the Ka. It is a measure of the acidity of a weak acid, which is a substance that does not completely dissociate in water. The expression for the acid dissociation of the weak acid (HA) can be given as follows:

HA ⇋ H⁺ + A⁻

Initially, the concentration of the HA in the solution is [HA]. When an acid is added to the water, the concentration of hydrogen ion [H⁺] is increased. At the same time, the concentration of the conjugate base [A⁻] increases. At equilibrium, the concentration of the three substances will be as follows:

[H⁺] = x[A⁻] = x[HA] = [HA] - x

The pH of a solution can be calculated from [H⁺] as follows:

pH = - log10 [H⁺]

The Ka is calculated using the equilibrium expression below:

Ka = [H⁺][A⁻] / [HA]

Substitute the given values into the equations.

pH = 3.26

pH = -log10 [H+]

[H+] = 6.9 × 10⁻⁴

[HA] = 0.02M

Ka = [H+][A-] / [HA]

Ka = (6.9 × 10⁻⁴)² / (0.02 - 6.9 × 10⁻⁴)

Ka = 5.9 × 10⁻⁹

Hence, the Ka of niacin is 5.9 × 10⁻⁹.

Therefore, the correct option is A.

Learn more about Niacin here:

https://brainly.com/question/28347414

#SPJ11

Explanation:

Since [H+] [OH-] =10^(-14)

[H+] = (10^-14) / (1.4×10^-10)

A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.

When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.

The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.

In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.

Find out more on batteries at https://brainly.com/question/16553902

#SPJ1

Answer:

2.A baby grasshoper is a nymph.

Explanation:

Answer:

yourinagenjitsulol

Expert

75 answers

3.6K people helped

Answer:

2.A baby grasshopper is a nymph.

Explanation:

i agree

The reaction between pottasium metal and chlorine gas is a combination reaction and it is as follows;

2K + Cl₂ → 2KCl

A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

A chemical reaction is said to be a combination reaction when two or more atoms are joined together to form a compound. An example is the reaction of pottasium metal and chlorine gas to produce pottasium chloride as follows:

2K + Cl₂ → 2KCl

In the above equation, two elements; pottasium chemically combines with chlorine to form a compound; pottasium chloride.

Learn more about combination reaction at: https://brainly.com/question/32027270

#SPJ1

Answer:

Convergent Boundary describes the area where himalayan mountains formed.

Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

Learn more about Van der Waals force here:

https://brainly.com/question/11457190

#SPJ5

Chemical energy is a form of potential energy because the energy stored in the chemical bonds can be used to generate work when they are broken down in exothermic reactions.

Chemical energy is a form of potential energy because the bonds of compounds (e.g. foods) may release energy when they are break down during enzymatic reactions, thereby storing potential energy that is transformed into kinetic energy.

In conclusion, chemical energy is a form of potential energy because the energy stored in the chemical bonds can be used to generate work when they are broken down in exothermic reactions.

Learn more about chemical energy here:

https://brainly.com/question/5650115

#SPJ1

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{15}{14} \\ =1.0714285 ...\)

We have the final answer as

Hope this helps you

If one strand of a DNA molecule has the sequence of bases 5'-ATTGCA-3', the other complementary strand would have the sequence 5'-TGCAAT-3'.

The complementary strand of DNA would have the sequence 5'-TGCAAT-3' if one strand of a DNA molecule has the sequence of bases 5'-ATTGCA-3'.There are a number of rules governing which bases pair with each other. In DNA, Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C).

Therefore, because A and T pair together and G and C pair together, the complementary strand can be found by simply switching out A for T and G for C or vice versa.

The base-pairing rules also imply that the 5' end of one strand is complementary to the 3' end of the other strand and vice versa. The correct complementary sequence to 5'-ATTGCA-3' would thus be 5'-TGCAAT-3'.

Therefore, option B) 5'-TGCAAT-3' is the right answer.

To learn more about complementary strand check the link below-

https://brainly.com/question/1534778

#SPJ11

Answer:

mass number = protons + neutrons.

Explanation:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.