carbonic acid (h2co3) is a weak acid formed when carbon dioxide dissolves in water. what ions could be present in a carbonic acid solution?

Out of the given options, silver will not corrode when acid rain falls on the metal. Silver is considered to be a noble metal that is resistant to corrosion by most acids, including sulfuric acid (H2SO4) and hydrochloric acid (HCl).

Silver is highly resistant to corrosion in the atmosphere and water, making it an excellent material for jewelry, silverware, and coinage. However, it can tarnish if exposed to hydrogen sulfide or sulfur in the air. Therefore, option (d) silver is the correct answer. As we know, Acid rain is caused by the burning of fossil fuels, including coal and oil, which release large amounts of sulfur dioxide and nitrogen oxides into the air.

When these substances combine with water vapor, they form sulfuric acid and nitric acid, respectively, which fall back to the earth as acid rain. When acid rain falls on metals such as iron, steel, copper, zinc, and aluminum, they can corrode and weaken, eventually causing structural damage and failure. Magnesium, aluminum, and lithium are highly reactive metals that are prone to corrosion when exposed to acid rain. Iron and lead are also highly reactive and will corrode when exposed to acid rain. Hence, the correct answer is (d) silver.

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Answer:

386.66 g/mol  

Explanation:

To calculate the molar mass of a molecule, you add up the molar masses of its atoms.

Thus, for cholesterol. we get

27C = 27 × 12.011  =  324.297 g

46H = 46 ×   1.008 =    46.368

 1O =    1 × 15.999 =   15.999

                TOTAL = 386.655  g

To two decimal places, the molar mass of cholesterol is 386.66 g/mol

Answer: write the solubility equilibrium and the solubility-product constant expression for the slightly soluble salt CaF2 CaF2 (s) <---> Ca2+ (aq) + 2F- (aq) Ksp=[Ca2+][F-]2.

Explanation:

Answer:

Explanation:

Hydrochloric acid and sodium hydroxide can be combined in equal ratios to form sodium chloride and water. Which best explains the reaction? The total volume produced by combining hydrochloric acid and sodium hydroxide will result in the same volume of sodium chloride and water.

Answer:

The part that is put in the same time as ruthenium, but has a greater number of atoms than silver.

Answer:

The answer is silver.

Explanation:

edge 2022, trust

Answer: 106.68 cm

Explanation:

1 inch=2.54 cm

42 inches * 2.54 cm/1 in=

42 * 2.54 = 106.68 cm

The molarity of the solution is 0.33 M.

To calculate the molarity, you need to divide the moles of solute by the volume of the solvent in liters. In this case, you have 2.0 moles of solute and 6.0 liters of solvent. Using the formula M = moles/volume, you can find the molarity of the solution:

M = (2.0 moles) / (6.0 L)
M = 0.33 M

This means that the concentration of the solute in the solution is 0.33 moles per liter. Molarity is an important concept in chemistry as it helps in determining the concentration of a particular substance in a solution and is useful in various calculations and reactions.

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Phương trình NaOH sai nha

A. If there are five O₂ molecules, each O₂ molecule consists of two oxygen atoms. Therefore, the total number of oxygen atoms would be 5 × 2 = 10.

If there are eight H₂ molecules, each H₂ molecule consists of two hydrogen atoms. Therefore, the total number of hydrogen atoms would be 8 × 2 = 16.

B. For water (H₂O) to form, it requires two hydrogen atoms and one oxygen atom. Since there are only 10 oxygen atoms available, the maximum number of water molecules that can form is limited by the number of oxygen atoms. Therefore, the maximum number of water molecules that can form is 10/1 = 10.

C. After the reaction, if all the available oxygen atoms react with hydrogen atoms to form water molecules, there will be no oxygen or hydrogen left over.

D. Since there are 10 oxygen atoms available and only 8 hydrogen atoms, the hydrogen is the limiting reactant. This means that the reaction will stop once all the hydrogen is consumed, and there will be some excess oxygen atoms remaining.

E. As an AI text-based model, I'm unable to perform real-time simulations or reactions. Therefore, I cannot provide information on what happens after the reaction completes.

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Answer:

Hydroxyl

Explanation:

A P E X

Answer:

mass of the object and how much energy the object has

The equation of the standard curve is created by plotting known concentrations of protein against their corresponding optical density values. Once the equation of the standard curve is established, any unknown optical density value can be inserted into the equation to determine the corresponding protein content.  The statement is correct.



The student's statement is correct because the standard curve is created by plotting known concentrations of protein against their corresponding optical density values. The equation of the standard curve can then be used to determine the protein concentration of unknown samples based on their optical density. This is achieved by inserting the unknown optical density value into the equation of the standard curve to obtain the corresponding protein concentration. Therefore, the student's statement is right.

In conclusion, the student is correct. By using the equation of the standard curve, any value of optical density can be used to determine the corresponding value of protein content. It is essential to understand the principle behind creating a standard curve to get accurate results when determining protein content.

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The given statement "the physical state of a reactant or product will affect the enthalpy of reaction in a thermochemical equation," is false.

The heat of reaction is influenced by the physical state of the reactants and products.

The term "thermochemical equation" refers to a balanced chemical equation that not only specifies the quantities of the various reactants and products but also the quantity of heat generated or absorbed.

A thermochemical equation may be written using fractional coefficients.

H2 ( g ) + ½ O2 ( g ) ⇒H2O ( l ) +285.8 KJ mol-1

H2 ( g ) + ½ O2 ( g ) ⇒ H2O ( l )  ΔH = – 285.8 KJ mol-1

When 1 mole of hydrogen and 0.5 mole of oxygen react, 285.8 KJ mol-1 of heat is produced. The heat generated will also double if the reactant amounts are doubled.

2H2 ( g ) + O2 ( g ) → 2 H2O ( l ) + 571.6 KJ mol-1

2H2 ( g ) + O2 ( g ) → 2H2O ( l ) ,ΔH = – 571.6 KJ mol-1

The heat of reaction, enthalpy of reaction, or enthalpy change of reaction is the quantity of heat that is evolved or absorbed in a chemical reaction once the number of moles of reactants as represented by the chemical equation have completely reacted.

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One displacement reaction is the answer. Single displacement reactions occur when an element in one compound is changed in another. Metal magnesium reacts in the reaction described.

This powdery substance is created when magnesium delivers 2 electrons to oxygen atoms. The reaction here is exothermic. Chemical reactions that release energy on a net basis are referred to as exothermic reactions.

When magnesium and water mix, hydrogen is created along with a large amount of heat. Metallic magnesium responds rather slowly, but mag vapour, which is created when magnesium burns, reacts very quickly because of the elevated temp and effective mixing, and it swiftly generates heat. Water is added to burning magnesium, which causes an explosion.

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Answer:

Granite

Explanation:

Answer:

Granite

Explanation:

Igneous forms when rock is cooled and hardens by Magma.

And the option granite, which forms as magma cools deep underground

Hope it helps have a Good Day

hmmm water

Explanation:

Water can change if you put food coloring

in it

The percent yield of the compound C₅H₁₂ when 3. 00 g of C₅H₁₂ were obtained in the reaction of 5. 00 g of C₃H₄ is 4.16%.

In the actual world, chemical processes do not always happen as intended. Apart from spills and other experimental failures, there are frequently losses as a result of an incomplete reaction, unwanted side reactions, and so on. Chemists require a metric that reflects the success of a reaction. This is referred to as the percent yield.

To calculate the percent yield, first establish how much of the product should be created using stoichiometry. The theoretical yield is the greatest quantity of product that can be created from the given quantities of reactants. The amount of product created when the reaction is carried out in the laboratory is referred to as the real yield.

We have equation as,

5C₃H₄ + 8H₂ → 3C₅H₁₂

We have 3 grams of C₅H₁₂

we have 5 grams of C₃H₄

Theoretical yield = C₅H₁₂ = 5 x 12 + 12 x 1 = 72

So percent yield  = actual yield / Theoretical yield x 100

= 3/ 72 x 100

= 0.04167 x 100

= 4.16 %

So percentage yield is 4.16%.

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In a radioactive decay, the number of atoms decaying at any time is proportional to the number 'N' of such atoms present at that instant. This is the characteristic of the first order reactions. Here the remaining atoms is 125000.

The half life period of a radionuclide is defined as the time required for the decay of one half of the amount of the species. The half life period is a characteristic of a radionuclide. The half lives of different radionuclides vary from fractions of seconds to billions of years.

The substances whose nucleus is unstable are called as the radioactive substances. They achieve stability through changes in the nucleus.

Here original amount (N₀) = 500,000

Number of half-lives (n) = 2

N = N₀ / 2ⁿ

N = 500,000 / 4

N = 125000

So the number of remaining atoms are 125000.

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Answer:23.976

Explanation:830j = 197.6 cal. 197.6/100g=1.976 degrees. plus 22 degrees =23.976

Answer:

Density, \(d=2.09\ g/cm^3\)

Explanation:

Given that,

Mass of a flask is 450 g

Volume of benzene added to the flask is 145 mL or 145 cm³

The weight of the flask and benzene is found to be 754 g.

We need to find the density of the benzene.

Weight of benzene added = total weight of flask and benzene-mass of flask

m = 754 g - 450 g

m = 304 g

Density = mass/volume

So,

\(d=\dfrac{304\ g}{145\ cm^3}\\\\d=2.09\ g/cm^3\)

So, the density of the benzene is \(2.09\ g/cm^3\).

Answer:

carcinogen

Explanation:

cigarette smoke and UV radiation both of the capability to cause cancer cells in living tissue, meaning they can both be classed as carcinogens

Answer:

Chemical Reaction

Explanation:

because one is a base and the other is an acid. Baking soda is a basic compound called sodium bicarbonate.

Ionization energies of C, N, and O should be in the following order: C<O<N.

Ionization energy, sometimes referred to as ionization potential, is the amount of energy needed to remove an electron from an isolated atom or molecule in physics and chemistry.

The ionization energy rises over time when going from left to right. The rise in the effective nuclear charge is to blame for this.

The attractive positive charge of nuclear protons acting on valence electrons is known as effective nuclear charge. Due to the shielding effect, the effective nuclear charge is always smaller than the total amount of protons in a nucleus.

The ionization energy of O, however, is smaller than that of N. This is because the removal of an electron from a stable, partially filled 2p subshell in the case of N needs a significant amount of energy.

Hence, Ionization energies of C, N, and O from least to greatest  should be in the following order: C<O<N.

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The electric potential energy of the electron in the n = 3 state of the hydrogen atom can be calculated using the formula for total energy derived from energy proportions.

The total energy of an electron in the nth state of a hydrogen atom can be given by: Eₙ = (-2.18 × 10⁻¹⁸ J)(1/n²) This formula expresses the total energy of an electron in terms of its principal quantum number, n. To find the electric potential energy of the electron when it is in the n = 3 state, we can simply plug in n = 3 into the above formula: Eₙ = (-2.18 × 10⁻¹⁸ J) (1/3²) = -7.70 × 10⁻¹⁹ J Therefore, the electric potential energy of the electron in the n = 3 state of the hydrogen atom is -7.70 × 10⁻¹⁹ J.

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1) To calculate the molarity of NaClO₃ the first thing you need to do is transform 57 g of it in mole. For this, you use the following equation:

mole = mass / molar mass

molar mass of NaClO₃ = 23 + 35.5 + (3×16) = 106.5 g/mol

mole = 57/106.5

mole = 0.535 moles

2) Now you transform 300 mL of water into liters. You just need to divide it to 1000. So you have 0.3 liters of it.

3) Now you use the following equation to calculate the molarity:

M = n/V

M = Molarity

n = moles

V = volume of the solution

M = 0.535/0.3

M = 1.78 moles/Liter

Answer: 1.78 moles/Liter

The resistance and the effort force are used to calculate the mechanical advantage. Arranging the threads of the screw closer together will increase the mechanical advantage. Thus, option C is correct.

Mechanical advantage is the ratio of the output force to the input force. It allows easier task performance by obeying the conservation of mass.

The closer threads of the screws make the distance covered to be more, and the force applied will be multiplied which will be a mechanical advantage over threads placed far apart.

Therefore, option C. threads located closer have more mechanical advantages.

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Answer

Explanation

Note: The reaction is a double replacement reaction in which two soluble ionic compounds react in an aqueous solution to form an insoluble solid.

In this case, a solution of sodium carbonate, Na2CO3, will contain

The complete balanced equation that occurs when sodium carbonate is added to hard water is

Answer:

8 .....................