What minerals are formed or dissolved in water according to the amount of carbonic acid present?

Answer:

Explanation:

glucose and oxygen

Answer:

3 atoms

Explanation:

There is one calcium atom (Ca) and two Bromine atoms (Br2)

Answer:

A liquid with a pH of 1 is a very acidic liquid. It has a high concentration of hydrogen ions (H+) and a low concentration of hydroxide ions (OH-). Examples of such liquids include hydrochloric acid (HCl) and battery acid. It is important to handle such liquids with caution as they can be corrosive and harmful to human health.

The empirical formula of a compound gives the whole number ratio of atoms of various elements. The molecular formula of the compound is C₆H₆.

The molecular formula of a compound is defined as the formula which gives the actual number of atoms of various elements present in one molecule of the compound.

Here 92.24 % 'C' = 92.24 g

7.76 % 'H' = 7.76 g

Number of moles (n) = Given mass / Molar mass

'n' of 'C' = 92.24 / 12 = 7.68 moles

'n' of 'H' = 7.76 / 1 = 7.76 g

Number of atoms of 'C' = 7.68 / 7.68 = 1

Number of atoms of 'H' = 7.76 / 7.68 = 1

So empirical formula is CH.

The molecular weight of CH = 13

Number of atoms of each element = 78.12 / 13 = 6

Thus the molecular formula is C₆H₆.

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H2 cannot be the chemical symbol for an element.

Chemical elements, functional groups, and compounds are all denoted by chemical symbols, which are shorthand abbreviations. Chemical elements are typically represented by one or two letters from the Latin alphabet, with the first letter capitalized.

Dihydrogen is referred to as H2. It is a gas molecule, an elemental molecule, and an elemental hydrogen. Dihydrogen is not a name for an element in the periodic table.

Two hydrogen atoms are linked by a single bond to form the elemental molecule known as dihydrogen. It serves as a fuel, an electron donor, an antioxidant, a human metabolite, and a component of the food packaging gas. It is a gas molecule, an elemental molecule, and an elemental hydrogen.

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The concentration of R at Equilibrium is 2.24 microMolar and the concentration of Q at Equilibrium is 0.56 microMolar.

What is Equilibrium constant ?

The equilibrium constant (K) is a measure of the extent to which a chemical reaction has proceeded towards equilibrium, and is defined as the ratio of the concentrations of products to the concentrations of reactants at equilibrium, with each concentration raised to the power of its stoichiometric coefficient. In other words, for a chemical reaction of the form:

aA + bB ⇌ cC + dD

The equilibrium constant is given by:

K = [C]^c [D]^d / [A]^a [B]^b

Where [X] represents the concentration of species X, and a, b, c, and d are the stoichiometric coefficients of species A, B, C, and D, respectively. The equilibrium constant is a dimensionless quantity, and its value depends only on the temperature and pressure at which the reaction is taking place. A larger value of K indicates that the reaction has proceeded further towards the product side at equilibrium.

K = R/Q

4=1.4+x/1.4-x

Therefore, x =0.84

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The statement which is false is option 4, when a substance evaporates, a major fraction of the intermolecular forces are disrupted. Because, evaporation needs higher energy.

Intermolecular forces are the forces of attraction that held the molecules of a compound together. There are various types of intermolecular forces, such as hydrogen bonding, dipole - dipole forces, dispersion forces etc.

To melt or boil a compound, energy have to absorbed by the molecules to weaken the intermolecular forces. The enthalpy change of a phase change is the change in heat absorbed or released during the phase transition.

All the statements are correct, except the fourth one which says evaporation leads to disruption of small fraction of intermolecular forces. But in fact, evaporation of a compound, affect the entire intermolecular forces in the compound.

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The statement that is true of water's tensile strength is: it involves both cohesion and adhesion. Option A, B and C are correct.

Tensile strength refers to the ability of a liquid to resist being pulled apart. In the case of water, its tensile strength is due to both cohesion, the attraction between water molecules, and adhesion, the attraction between water and other surfaces.

Water's hydrogen bonding creates strong cohesive forces between water molecules, allowing them to stick together and resist being pulled apart. Meanwhile, water's adhesion allows it to stick to other surfaces, such as the walls of a narrow tube, which helps to pull water through plants.

Therefore, while both statements (a) and (b) are partially correct, statement (c) is the most accurate as it encompasses both cohesion and adhesion, which together contribute to water's tensile strength.

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The given reaction involves the reduction of a ketone using NaBH4 and subsequent exchange of a proton with deuterium in D2O.

In the first step, NaBH4 donates a hydride ion (H-) to the carbonyl carbon of the ketone, forming an alkoxide intermediate. The hydride ion acts as a nucleophile, attacking the electrophilic carbon of the carbonyl group. In the second step, the alkoxide intermediate is protonated by D2O, leading to the formation of the corresponding alcohol and release of NaOD. The proton exchange with D2O results in the replacement of a proton by a deuterium atom. The final products are the deuterated alcohol and NaOD. The curved arrows in the mechanism represent the flow of electrons, and it is essential to show all the nonbonding electron pairs involved in each step. The given reaction involves the reduction of a ketone using NaBH4 and subsequent exchange of a proton with deuterium in D2O.

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The most accurate statement regarding a correlation coefficient of 0.60 for two variables Y and X is significantly different from zero. Option A is the correct answer.

A correlation coefficienb of 0.60 indicates a moderate positive relationship between the two variables, which is significantly different from zero. This means that there is a statistically significant association between the two variables, but it does not necessarily indicate a causal relationship or the direction of the relationship between the two variables.

Additionally, the correlation coefficient measures the strength and direction of a linear relationship between two variables, and does not capture non-linear relationships or other types of associations between the variables.

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In a bridged bicyclic system, a substituent is nearer or closer to the shorter bridge that joins the two carbons common to both rings. Electron-withdrawing substituents in the dienophile will increase the reaction rate of a Diels-Alder reaction. For conjugated dienes, the s-cis conformation has two double bonds on the same side of the single bond, whereas the s-trans conformation has two double bonds on the opposite side of the single bond. The Diels-Alder reaction is an addition reaction between a diene and an alkene called a dienophile, to form a new six-membered ring. A bicyclic ring system in which the two rings share non-adjacent carbon atoms is called a spiro ring system.

The Diels-Alder reaction is a chemical reaction between a diene and a dienophile, resulting in the formation of a cyclic compound called a cycloadduct.

In the Diels-Alder reaction, the diene acts as a nucleophile, while the dienophile acts as an electrophile. The reaction involves the formation of a new carbon-carbon bond between the diene and the dienophile, with the loss of two pi electrons. The reaction is typically carried out in the presence of a Lewis acid catalyst, which helps to polarize the dienophile and promote the reaction.

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By inducing them to precipitate, the following ions could be separated by adding HCl:

Ag+, Hg22+, Pb2+

Hydrochloric acid, sometimes known as HCl, is a potent, extremely acidic mixture of hydrogen chloride (HCl) and water. It is a liquid that is colorless, corrosive, and has a strong odor. It is frequently used in industrial and laboratory settings for tasks like metal cleaning, pickling, and pH control.

Ag+, Hg22+, and Pb2+ ions would precipitate from the mixture with the addition of HCl because they produce insoluble chlorides. Hg22+, Pb2+, and Ag+ all produce a white precipitate of AgCl, a yellow precipitation of Hg2Cl2, and a white precipitate of PbCl2. Due to the fact that they either do not create chlorides or their chlorides are soluble in water, the other ions in the combination would not precipitate with the addition of HCl.

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The pH of 500 ml of water to which 15 ml of 1.0 M KOH has been added is 12.4.

The volume of the water = 500 mL

The volume of the KOH = 15 mL

The total volume = 500 + 15

                            = 515 mL

                           = 0.515 L

The moles of the KOH = molarity × volume in L

The moles of the KOH = 1 × 0.015

                                      = 0.015 mol

The molarity = 0.015 / 0.515

Molarity = 0.029 M

The KOH dissociates is completely, the added [OH] is equal to the [KOH]

pOH = - log ( 0.029 + 10⁻⁷ )

The Hydroxide ion concentration in the water is  1.0 x 10-7M,  is ignored because it is much smaller .

pOH = - log (0.029)

pOH = 1.52

pH = 14 - pOH

pH = 14 - 1.52

pH = 12.4

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The salt that would give you the highest concentration of phosphate ions in solution if you placed 1 mole of the salt in a litre of water is the one with the highest Kₛp value. i.e. option B

The Kₛp value indicates the solubility product constant, which is a measure of the solubility of a salt in water.

The higher the Kₛp value, the more soluble the salt is in water, and therefore the higher the concentration of ions in solution.

Out of the given options, the salt with the highest Kₛp value is Pb³(PO⁴)² with a Kₛp value of 3.0 x 10–⁴⁴.

Therefore, this salt would give you the highest concentration of phosphate ions in solution if you placed 1 mole of the salt in a litre of water.

Therefore the correct option is (b.) Pb³(PO⁴)² K³p= 3.0 x 10–⁴⁴

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Placing an alcoholic beverage in a freezer will not result in a solid, frozen product because the freezing point of ethanol is very low.

Alcoholic beverages are defined as any fermented liquor, such as wine, beer, or distilled spirits, that contains ethyl alcohol, or ethanol (CH₃CH₂OH), as an intoxicating agent.

When we place alcohol in a freezer it often does not get frozen. This happens because we can't get it cold enough. Generally the freezing point of ethanol (the main component of alcohol) is -114 C or (-173 F). And our home freezer probably doesn't go below -20 F at its best.

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We can say that the volume of the object is directly proportional to its mass. As the volume increases the mass of the object increases in direct proportion.

Option (B) Formed when each atom shares one of its outer-orbit electrons with the other atom.

In a covalent bond, two atoms share a pair of electrons to complete their outermost (valence) electron shell. This sharing of electrons results in a stable electronic configuration for both atoms. Covalent bonds can be polar or nonpolar, depending on the electronegativity difference between the atoms. They are generally weaker than ionic bonds, but stronger than intermolecular forces. Option (B) Formed when each atom shares one of its outer-orbit electrons with the other atom is the correct answer for this question. This sharing of electrons results in a stable electronic configuration for both atoms.

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The given reaction is a second order reaction with the rate constant, k = 2.25 × 10⁻².

Since the concentration doesn't change uniformly with respect to time, hence the reaction cannot be zero order,

A(o) = [A(t)] + kt

Now, if we check the half-life is not coming in constant interval time limit, hence the reaction cannot be first order,

In{A(o)/A(t)} = kt  [Since for the first order reaction, the half life is independent of concentration]

Let us assume that the reaction is second order

1/[AB(T)] = 1/[AB(o)] + kt

1/0.459 = 1/0.950+ k(50)

k = 2.25 × 10⁻²

Taking another sample point to check if it is second order

1/0.302 = 1/0.950 + k(100)

k = 2.25 × 10⁻²

So, the value is constant, hence the reaction is second order

The value of rate constant will be 2.25 × 10⁻²  with the units M^(-1) s^(-1)

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Choosing the appropriate phrase for a scientific essay is selecting one that Choosing the preferred course is preferable to making a sacrifice. The best phrases can sometimes be shortened despite their length.

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According to the forces of attraction , as water passes on in water cycle its state changes from liquid to vapor and solid in form of ice and then back to liquid.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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1) The equilibrium constant is K< 10^-3

2) The reaction makes more lime at higher temperatures.

3) The equilibrium lies to the far left

4) The equilibrium lies to the far right

The equilibrium constant, also known as the reaction quotient, is a value that describes the relative concentrations of reactants and products in a chemical reaction at equilibrium. It is denoted by the symbol "Kc" and is defined as the ratio of the product of the concentrations of products raised to their stoichiometric coefficients to the product of the concentrations of reactants raised to their stoichiometric coefficients.

In mathematical terms, the equilibrium constant can be expressed as:

Kc = [C]^c [D]^d / [A]^a [B]^b

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The atom loses an electron in order to reach a stable state, revealing the level with 8 electrons previously, and transforms into an ion with one positive charge.

When all of the electrons in an atom are at their lowest energy levels, this is known as the ground state. The energy level with the least energy out of the four that are visible is level K.

The electron configuration in sodium's ground state is 1s22s22p63s1. The primary quantum number (n), the orbital (s, p, d, or f), and the total number of electrons are used to represent electron configurations. The total number of electrons is expressed as a superscript.

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By limiting contact and doing routine sanitization, RSV infection can be avoided.

Respiratory syncytial virus, also called human respiratory syncytial virus and human orthopneumovirus, is a common and contagious virus that causes infections of the respiratory system. It is a negative-sense RNA, single-stranded virus. Although the majority of people recover within a week or two, RSV can be devastating, especially for young children and the elderly. RSV is the most common cause of pneumonia (lung infection) and bronchiolitis (inflammation of the small airways of the lung) in infants under one in the United States.

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The reaction you have written is a chemical equation for a precipitation reaction between iron(III) nitrate and lithium chromate, which results in the formation of iron(III) chromate and lithium nitrate. Precipitation reactions occur when two solutions are mixed and a solid product is formed, which typically settles at the bottom of the container. The equation is balanced, meaning that the number of atoms of each element is equal on both sides of the arrow. This is an important aspect of chemical reactions, as the law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.

In the reaction: 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O, the reactants are NH₃ and O₂ and the products are NO and H₂O.

The balanced chemical reaction is given as,

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

The substance present in the left of the arrow in a chemical equation are called reactants. Basically, a reactant is a substance that is present at the start of a chemical reaction. The substance(s) present in the right of the arrow are called products. Basically, a product is defined as a substance that is present at the end of a chemical reaction.

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The results of the given operations expressed in scientific notation are:

a. 3.01 * 10⁻¹ g

b. 6.957 x 10⁹ g

c. 3.21 * 10¹ m

d. 4.338 * 10⁻⁸ g/mL

The results of the following operations expressed in scientific notation are as follows:

a. (1.54 x 10⁻² g) + (2.86 x 10⁻¹ g)

= 0.154 x 10⁻¹ g + 2.86 x 10⁻¹ g

= 3.01 * 10⁻¹ g

b. (7.023 x 10⁹ g) - (6.62 x 10⁷g)

= 7.023 x 10⁹ g - 0.0662 x 10⁹ g

= 6.957 x 10⁹ g

c. (8.99 × 10⁻⁴ m) x (3.57 x 10⁴ m)

= 3.21 * 10¹ m

d. 2.17 × 10⁻³ g / 5.002 x 10⁴ mL

= 4.338 * 10⁻⁸ g/mL

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0.76 moles are present in 64.7 g of NaNO[tex]_3[/tex]. a mole is a proper scientific unit used to measure significant amounts.

In chemistry, a mole is a proper scientific unit used to measure significant amounts of extremely small things such as atom, molecules, as well as other designated particles. It is also spelt mol.

The mole denotes a massive amount of units, 6.02214076 1023. The mole was established by the General Conference on Measurement and Weights as this amount again for International System of Units (SI).

mole = mass/ molar mass

         = 64.7 /84.99

         =0.76moles

Therefore, 0.76 moles are present in 64.7 g of NaNO[tex]_3[/tex].

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None of the other choices are correct. Because all the other choices are the factors which contribute to the sea level rise.

Sea level rise is caused mainly by two factors linked to global warming, those are: the added water from the melting ice sheets and the glaciers, and the expansion of seawater as it is getting warm. The ice melting from land into the ocean, warming waters which expand, the slowing Gulf Stream, and the sinking land are all contribute to sea level rise.

Sea level is mainly measured by using the tide stations and the satellite laser altimeters. Tide stations around the world tell us what is occurring at a local level, that is the height of the water as measured along the coast relative to a specific point on land.

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The following nucleophiles would be considered basic for reaction with an epoxide: NaOH, H2O, CH3ONa, CH3OH, LiAlH4, RMgBr and CH3CC- (alkynyl anion).

Basic nucleophiles are typically more reactive towards epoxides than acidic nucleophiles due to their electron-rich nature, which allows them to attack the highly electrophilic carbon centre of the epoxide ring. Acidic nucleophiles are species that can donate electrons to form a new bond with an electron-deficient center, such as a carbocation or an electrophilic carbon atom.

These nucleophiles can attack the carbon centre of the epoxide and open the ring to form a new alkoxide or alkyne product, depending on the specific conditions and reagents used.

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The macroscopic absorption cross-section of SS-304 is 5.34*10^-2 cm^-1 and a neutron will travel 18.7 cm in SS-304 before being absorbed.

The macroscopic absorption cross-section of SS-304 can be calculated using the equation:

Σa = Nσa

Where N is the number density of the material and σa is the microscopic absorption cross-section.

First, we need to calculate the number density of each element in SS-304:

N₍c₎ = (0.08/100) * (7.86 g/cm^3) / (12.011 g/mol) * (6.022*10^23 atoms/mol) = 1.57*10^21 atoms/cm^3

N₍cr₎ = (19/100) * (7.86 g/cm^3) / (51.996 g/mol) * (6.022*10^23 atoms/mol) = 1.44*10^22 atoms/cm^3

N₍ni₎ = (10/100) * (7.86 g/cm^3) / (58.693 g/mol) * (6.022*10^23 atoms/mol) = 8.08*10^21 atoms/cm^3

N₍fe₎ = (71.92/100) * (7.86 g/cm^3) / (55.845 g/mol) * (6.022*10^23 atoms/mol) = 4.88*10^22 atoms/cm^3

Next, we can plug in the values for the number density and the absorption cross-sections into the equation:

Σa = (1.57*10^21 atoms/cm^3) * (0.0034 b) + (1.44*10^22 atoms/cm^3) * (3.1 b) + (8.08*10^21 atoms/cm^3) * (4.43 b) + (4.88*10^22 atoms/cm^3) * (2.55 b)

Σa = 5.34*10^-2 cm^-1

To find the average distance a neutron will travel in this material before being absorbed, we can use the equation:

l = 1/Σa

l = 1/(5.34*10^-2 cm^-1)

l = 18.7 cm

Therefore, on average, a neutron will travel 18.7 cm in SS-304 before being absorbed.

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