1.2 moles of oxygen represents how many atoms of oxygen

Answer:

5 is the correct answer of this

Answer:

m=2.0796kgmass or 20.3938N

Explanation:

m=Fa/K

convert 50N to Kg = 50N( .10197kg/1N) cancel N = 5.0958kgf

m= 5.0958kgf(4m/s²) all over K

k= 9.8066(kgm•m/kgf•s²)

m= 5.0958kgf(4m/s²) all over 9.8066 kgm•m/kgf•s²)

m= 2.0796kgm

in Newton

m= 20.3938N..

sana tama.

number of decayed daughter material                 percent                    decayed(radioactive decay)

          (400-N)                                                       (number of decayed/400)

1)                0                                                                        0%

2)                169                                                                         57.7%

3)                 287                                                                  28%                                                                  

4)                  320                                                                       15%

5)                 369                                                                             7%  

Ionising radiation is released as a result of radioactive decay. Among the ionising radiation that is released are alpha, beta, and/or gamma rays. Unbalanced atoms known as radionuclides are the site of radioactive decay. The periodic table's elements can appear in a variety of ways. These formations come in both stable and unstable varieties. The most commonly found form that an element in nature is typically the one that is most stable. All substances, though, have an instability form. Unstable forms are radioactive and release ionising radiation.

number of decayed daughter material                                 percent decayed

          (400-N)                                                           (number of decayed/400)

1)                0                                                                        0%

2)                169                                                                         57.7%

3)                 287                                                                  28%                                                                  

4)                  320                                                                       15%

5)                 369                                                                             7%  

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There are several definitions of acids and bases, and each definition provides a unique perspective on their properties and behaviors.

Arrhenius Definition:

According to the Arrhenius definition, an acid is a substance that dissociates in water to form hydrogen ions (H+), while a base is a substance that dissociates in water to form hydroxide ions (OH-).

For example, hydrochloric acid (HCl) dissociates in water to form H+ and Cl- ions:

HCl → H+ + Cl-

On the other hand, sodium hydroxide (NaOH) dissociates in water to form Na+ and OH- ions:

NaOH → Na+ + OH-

Characteristics for identification:

Acids typically have a sour taste and can cause a burning sensation on the skin. Bases have a bitter taste and can feel slippery to the touch. They also typically have a higher pH value (greater than 7) in aqueous solutions.

Bronsted-Lowry Definition:

According to the Bronsted-Lowry definition, an acid is a substance that donates a proton (H+) to another molecule or ion, while a base is a substance that accepts a proton (H+) from another molecule or ion.

In this reaction, acetic acid is the acid because it donates a proton, while water is the base because it accepts a proton.

Characteristics for identification:

Acids and bases in the Bronsted-Lowry sense are identified by the presence or absence of a hydrogen ion. An acid must contain a hydrogen ion that can be donated to a base, while a base must have an available lone pair of electrons to accept a hydrogen ion.

Lewis Definition:

According to the Lewis definition, an acid is a substance that accepts a pair of electrons, while a base is a substance that donates a pair of electrons.

In this reaction, boron trifluoride is the acid because it accepts a pair of electrons, while ammonia is the base because it donates a pair of electrons.

Characteristics for identification:

Acids and bases in the Lewis sense are identified by their electron-pair accepting or donating abilities. An acid must be able to accept a pair of electrons, while a base must be able to donate a pair of electrons.

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Correct Question:

Explain the different definitions of acid and base. Give an example of each and the characteristics of your identification.

Answer:

Khfxgkhxxkfhkugxxiufxhfixiyf

Explanation:

Xlufy8fxtukuxfxtu

Answer: Celsius

Explanation:

The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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Answer:

LETTER C it can apply a greater output force over a greater distance compared to the input force and distance

Explanation:

i just know cause im smart like that

Answer:

\(V_{base}=6.0mL\)

Explanation:

Hello there!

In this case, by considering that the reaction between sodium hydroxide and hydrochloric acid is in a 1:1 mole ratio of these two reactants, we are able to use the following equation relating the concentration and volume of each one:

\(M_{acid}V_{acid}=M_{base}V_{base}\)

In such a way, by solving for the volume of the base, we will obtain:

\(V_{base}=\frac{M_{acid}V_{acid}}{M_{base}} \\\\V_{base}=\frac{0.5M*24mL}{2.0M}\\\\V_{base}=6.0mL\)

Regards!

Answer:

The primary distinction between liquid and aqueous is that liquid refers to any fluid that is almost incompressible, whereas aqueous refers to liquids that contain water as the solvent.

Explanation:

Answer:

Option C.

Ilegal dumping of waste

Explanation:

This is because non point source of pollution refers to source of pollution that are many and not directly one which is illegal or does not meet the legal term. This type of pollution does not have a point source, it has many sources and this type of pollution is cause by rainfall or precipitation. Where when the rain fall, it wash away the waste through to water bodies, causing pollution and endangering water bodies.

Answer: a) \(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

b) \(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

c) \(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equations are :

\(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

\(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

\(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

Answer:

See Explanation

Explanation:

Stereoisomers are isomers that have the same atom to atom connectivity but differ in the arrangement of atoms or groups in space.

Glucose and galactose are stereoisomers that have more than one stereogenic center but differ in the configuration of atoms and groups about one of the stereogenic centers. This kind of stereoisomers are also called epimers.

Glucose and galactose differ in the orientation of -H and -OH at carbon-4.

Answer:

A) Spectroscopes

Explanation:

Spectroscopes collects the light from distant stars and separate that light into bands of different colors; by studying these bands, astronomers identify the elements in a star.

Answer:

B and C

Explanation:

Answer:

B) A dead tree rots on the ground.

C) A forest fire burns a lot of trees.

Explanation:

It cannot return the the state it was in before or have the same composition it had before.

The molarity of the base used in the experiment, which was determined based on the recovered NaCl and the volumes of hydrochloric acid and sodium hydroxide, was approximately 1.15 M.

To determine the molarity of the base used in the experiment, we need to use the stoichiometry of the balanced chemical equation and the given data.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:

HCl + NaOH → NaCl + H2O

First, we need to find the number of moles of NaCl produced. We can do this by using the given mass of NaCl (2.22 g) and its molar mass (58.44 g/mol):

moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 2.22 g / 58.44 g/mol

moles of NaCl = 0.038 moles

Next, we can use the stoichiometry of the balanced equation to determine the number of moles of NaOH that reacted. Since the mole ratio between NaCl and NaOH is 1:1, the number of moles of NaOH is also 0.038 moles.

Now, we can calculate the molarity of the base (sodium hydroxide) using the given volume of sodium hydroxide solution (0.033 L):

Molarity of NaOH = moles of NaOH / volume of NaOH solution

Molarity of NaOH = 0.038 moles / 0.033 L

Molarity of NaOH ≈ 1.15 M

Therefore, the molarity of the base used in the experiment is approximately 1.15 M.

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The number of ionic bond in copper is zero.

Pure copper or any pure metal for that matter are examples of metallic bonds, which are neither ionic nor covalent. The copper atoms are stacked very tightly in a solid lattice. In fact it has a face centered cubic lattice which is the closed packing of atoms possible. Each atom has twelve nearest neighbors which allows their 4s orbitals (mostly) to have the optimal overlap. All of these orbitals therefore combine in one gigantic band of delocalized orbitals that spans the entire crystal with its myriad atoms. This band is only partly filled and the difference in energy between one state and the next is puny, which explains copper’s outstanding conductive properties.

Therefore, the bonding in copper has a metallic character.

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Answer:

11.54

Explanation:

-log(3.50*10^-3) = 2.46 pOH

pH = 14 - pOH

pH = 11.54

Answer:

thats the answer

Explanation:

The most appropriate reagent for the conversion of 2-hexanol to 2-hexanone is a oxidizing agent such as sodium dichromate (Na2Cr2O7) or potassium permanganate (KMnO4).

Oxidation of alcohols to carbonyl compounds (such as ketones) can be achieved using oxidizing agents like sodium dichromate or potassium permanganate. In this case, 2-hexanol can be oxidized to 2-hexanone using either of these reagents.

PCC is a mild oxidizing agent that selectively oxidizes primary alcohols to aldehydes and secondary alcohols to ketones without over-oxidizing them. In this case, 2-hexanol is a secondary alcohol, and using PCC will result in the formation of 2-hexanone.
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When removing electrons from any atom, the electrons that come off first are the ones in the outermost energy level or highest principal quantum number.

The outermost energy level of an atom is known as the valence shell. Electrons in this shell have the highest energy and are less tightly bound to the nucleus compared to inner electrons. According to the aufbau principle, electrons fill orbitals in increasing order of energy, with lower energy levels being filled before higher ones.

As a result, the outermost energy level has the highest energy and is more easily removed. The valence electrons play a crucial role in determining an atom's chemical behavior, as they are involved in bonding and chemical reactions.

Therefore, when atoms undergo ionization or lose electrons, it is the valence electrons that are typically removed first, leaving behind a positively charged ion.

This process is commonly observed in chemical reactions and is fundamental to understanding the behavior of elements in different bonding scenarios.

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Answer:

\({ \sf{A. \: \: { _{ - 1}{}^{0} e }}}\)

A beta particle is an electron.

Explanation:

\({ \tt{ {}^{4}_{2}He \: \: is \: an \: alpha \: particle.}} \\ { \tt{ \gamma \: \: is \: gamma \: rays}} \\ { \tt{ \alpha \: is \: same \: as \: alpha \: particle}}\)

The beta particles are the high energy electron radiations, with the representation as  as \(\rm ^0_{-1}e\).

The nuclear radiations result in the release of the mass in the form of varying types of particles. The particles ejected in nuclear reaction are alpha, beta, or gamma particles.

Beta particles are high energy particles with the presence of negative charge with the loss of electron.

The beta particle can be represented as \(\rm ^0_{-1}e\). Thus, option A is correct.

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I can help you with the chemistry problem and describe the steps, but I cannot draw the diagrams. Here are the steps to create the solution and calculate the new molarity:

Step 1: Calculate the moles of Cu(NO3)2 needed.

Molarity = moles of solute / volume of solution (L)

0.1176 M = moles of Cu(NO3)2 / 0.250 L

moles of Cu(NO3)2 = 0.1176 * 0.250 = 0.0294 mol

Step 2: Dissolve the required moles of Cu(NO3)2 in water.

Weigh 0.0294 moles of Cu(NO3)2 and dissolve it in a beaker with a smaller amount of distilled water (less than 250 mL).

Step 3: Transfer the solution to a 250 mL volumetric flask.

Pour the dissolved Cu(NO3)2 solution from the beaker into a 250 mL volumetric flask. Rinse the beaker with distilled water and pour the rinse water into the flask to ensure all the Cu(NO3)2 is transferred.

Step 4: Fill the volumetric flask to the 250 mL mark.

Add distilled water to the volumetric flask until it reaches the 250 mL mark. Mix the solution thoroughly.

Step 5: Draw 30.0 mL of the solution into a pipet.

Use a pipet to carefully draw 30.0 mL of the 0.1176 M Cu(NO3)2 solution from the volumetric flask.

Step 6: Transfer the solution to a 240 mL volumetric flask.

Empty the 30.0 mL from the pipet into an empty 240 mL volumetric flask.

Step 7: Fill the 240 mL volumetric flask to the mark.

Add distilled water to the 240 mL volumetric flask until it reaches the 240 mL mark. Mix the solution thoroughly.

Step 8: Calculate the new molarity.

M1V1 = M2V2

0.1176 M * 0.030 L = M2 * 0.240 L

M2 = (0.1176 * 0.030) / 0.240

M2 ≈ 0.0147 M

The molarity of the new solution is approximately 0.0147 M.

The answer is 2250 millilitres, 90.767 kilometres, and 49.489 inches. These have been obtained by conversion of 2.25 L to mL, 56.4 ml to km, and 125.7 cm to in respectively.

The representation of the same feature in a different unit of measurement is known as unit conversion. For instance, it is possible to describe a time in terms of minutes rather than hours and to change the unit of measurement for distance from miles to kilometres, feet, or any other length measurement.

Multiply the value in litres by the conversion factor '1000'. Then, 2.25 liters = 2.25 × 1000 = 2250 milliliters.

56.4 miles equals 90.7670016 kilometres.

125.7 centimetres = 49.489 inches. The formula is to multiply the value in centimetres by the conversion factor.

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The full question is as follows:

Solve the following problems using dimensional analysis. To receive credit, you must use dimensional analysis and you must show your work. Remember to report your answer using the correct units and proper significant figures.

Complete the following one-step conversions

a) 2.25 L to mL

b) 56.4 ml to km

c) 125.7 cm to in

Answer:

Reaction between an oxygen and  a phosphorus will produce oxides of phosphorus.

Explanation:

Reaction between oxygen and phosphorus produces four atoms of phosphorus with five atoms of oxygen. Sometimes it produces two atoms of phosphorus and five atoms of oxygen and sometimes four atoms of phosphorus and six atoms of oxygen. It does so depending upon the availability of oxygen. The size of phosphorus atom  interferes with the ability to form a double bonds to the other elements, such as nitrogen, oxygen, etc.

Answer:

Liquid B is expected to be at the top while liquid A is found at the bottom.

What is density?

The term density has to do with the ratio of the mass of a substance to its volume. Now given that the density of a substance actually shows how much heavy the substance is, it is not difficult to understand that a material that has a low density will flat at the top of a material that has a lower density.

Here we are told that the two liquids do not mix. If they do not mix then it follows that they must have formed a two phase system in which one is at the top of the other. The one that is at the top must have the lower density.

Thus, liquid B is expected to be at the top while liquid A is found at the bottom. From the density of the plastic cue, the cube will be at the top.

Explanation:

The order of the materials from the top to bottom in the cylinder would be Mineral oil, water, rubber stopper, lead, and mercury.

The density of a substance can be measured as the mass per unit volume. The average density will be equal to the total mass of the object divided by its total volume.

The formula for the density of the substance can be expressed as follows:

Density = Mass/Volume

The S.I. unit of the density can be written as Kg/m³. The density of a substance is an intrinsic characteristic as it doesn't depend on its size. If the size increases, the mass of the object increases as well but the density of the object remains constant.

Given, the materials water, mercury, mineral oil, rubber stopper, and a piece of lead have a density of 1.0 g/ml, 0.83 g/ml, 13.5 g/ml, 1.51 g/ml, and 11.33 g/ml respectively.

Therefore, the substance with the least density will stay at the top of the cylinder and the material with the greatest density will at the bottom of the cylinder.

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Answer:

C=M/V

Explanation:

C=M/V

=0.500mol÷300.0mL

=0.002mol/ML

Iron (II) nitrate solution reacts with sodium phosphate solution to form a precipitate. The precipitate formed is iron (II) phosphate, which is insoluble in water.When iron (II) nitrate solution is added to a sodium phosphate solution, a chemical reaction occurs.

Iron (II) nitrate is composed of iron and nitrate ions, while sodium phosphate is made up of sodium and phosphate ions. The balanced chemical equation for this reaction is:Fe(NO3)2 + Na3PO4 → Fe3(PO4)2 + 6NaNO3Iron (II) nitrate and sodium phosphate are the reactants in the equation, while iron (II) phosphate and sodium nitrate are the products. The reactants combine to form two products: iron (II) phosphate and sodium nitrate, which are both in aqueous form.The iron (II) phosphate, however, is insoluble in water and forms a solid precipitate when it is formed in the reaction. Sodium nitrate, on the other hand, remains in solution. The precipitate formed during this reaction can be separated from the solution using filtration or centrifugation.In conclusion, when iron (II) nitrate solution is added to a sodium phosphate solution, a precipitate of iron (II) phosphate is formed, which is insoluble in water.

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The net ionic equation of the hydrolysis reaction of Al(NO3)3 is:

Explanation:

The nitrate ion does not hydrolyze, and remains as it is in the solution.Hydrolysis of Al(NO3)3 leads to the formation of Al3+ and NO3- ions. Al3+ ion acts as a weak acid in the presence of water and gets hydrolyzed. The net ionic equation of the hydrolysis reaction of Al(NO3)3 is:Al3+ + H2O ⇌ Al(OH)2+ + H+Aluminum hydroxide ion, Al(OH)2+ acts as a weak base in the presence of water and gets hydrolyzed further to form Al(OH)3 and H+ ions. Al(OH)2+ ⇌ Al(OH)3 + H+Al(OH)3 is insoluble and forms a gel-like precipitate. The acidic and basic properties of Al3+ and Al(OH)2+ ions can be measured by finding the value of Kb and Ka respectively. The Kb expression value of Al(OH)2+ is 5.6 x 10-17.Kb expression is used for weak base, and the expression is given as follows:

Hydrolysis is the decomposition of substances in a chemical reaction caused by water. The chemical reaction in hydrolysis breaks down water molecules into hydrogen cations and hydroxide anions. Hydrolysis depends on the chemistry, solubility, degree of acidity and oxidation-reduction of each compound.

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Answer:

The element S creates an ion which is larger in size than the original atom.

Explanation:

The atomic radius of elements is a measure of the size of atoms of elements. The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. Atomic radius increases on going down the group in the period table but decreases on going rom left to right across a period in the periodic able. The increase in atomic radius on going down the group is due to the addition of an extra electron shell to successive atoms of elements in a group. However, atomic radius decreases across a period due to increase in the positive charge of the nucleus of elements in the same period.

When atoms of elements form ions, the ionic radius of the resulting ion can either increase or decrease. For positive ions, the ionic radii decreases due to  loss of electron increasing the attraction of the positive nucleus or even a complete loss of an electron shell. For anions, ionic radii increases due to gain of electrons which results in greater repulsion among neighboring electrons.

Among the elements given, rubidium (Rb), and calcium (Ca) for cations, hence, their size becomes smaller. Radon, Rn, being a noble gas is relatively inert, but forms positive ions when it does take part in reactions. Sulphur, S, however forms an anion, S²⁻, hence, its size increases.