Determine the mass, in grams, of 0.350 moles of s (1 mol of s has a mass of 32.07 g).

So the plum pudding model is different from the hard-sphere model of the atom because in the hard sphere model of the atom, the atom is the smallest division of matter.

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Answer:

below

Explanation:

Calculating the number of particles

1. The number of particles in a substance can be calculated using:

2. Number of particles = Avogadro constant × the amount of substance in mol.

3. Calculate the number of water molecules in 0.5 mol of water.

4. Number of water molecules = Avogadro constant x amount of substance in mol.

The lewis structures for the molecule (CH₂NOH),  molecule (CH₃NH₂), and  molecule (CH₃CN) is attached below.

b. The bond order is 3.

c. CH₃NH₂

d. CH₃NH₂

The lewis structure are :

CH₂NOH

    H

     :     . .   . .        

H : C = N - O - H

                  °°

CH₃NH₂

    H

    |      ..

H - C - N - H

      |     |

      H    H

CH₃CN

   H

     |

H - C - C ≡ N :

      |

      H

B.  The bond order of the carbon- nitrogen bond in the N-methylidene hydroxylamine molecule is 2.

C. Species has the longest carbon-nitrogen bond is CH₃NH₂, methylamine.

D.  Species has the weakest carbon - nitrogen bond is CH₃NH₂, methylamine.

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Explanation:

Metaloids and nonmetals are more likely to have the properties of liquids and gases.Though they can be elements and compounds like metals, it is less likely for you to see metaloids and nonmetals in a solid state like metals.

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Oxoacids get more acidic as the number of oxidations on the halogen rises.

Perchloric acid is the most potent acid there is. As NH 4Br is an acidic salt, the solution will be acidic even though the Br ions come from a strong acid (HBr), but the NH 4 + ions come from a weak base (NH 3). Br2 is therefore regarded as a mild Lewis acid. Large acceptor atoms in soft acids have a low positive charge, are highly polarisable, and have poor electronegativity. One of the finest nucleophiles, the bromide ion is a poor base. It chooses to take on a nucleophilic role.

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The molar concentration of of 8 gram of sodium sulfate(Na₂SO₄) dissolved in 210 ml of solution is 0.267.

Molar concentration is defined as the number of moles of a substance in 1 liter of solution. If molar concentration is denoted by M, number of mole denoted by "n" and volume of solution is denoted by V, then

M = n/V

Atomic weight of sodium sulfate(Na₂SO₄) = (23×2+32+16×4) = 142

142 gram is the weight of 1 mole of sodium sulfate(Na₂SO₄).

1 gram is the weight of 1/142 moles of Na₂SO₄

8 grams is the weight of (1×8)/142 = 0.056 moles

Volume of solution = 210 ml = 0.210 liter

So, the molar concentration,  M = 0.056/0.210

M = 0.267

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The balanced equation is 2Na + 2H2O → NaOH + H2

2Na+2H2O2NaOH+H2 is the balanced chemical equation.

A neutralization reaction is a chemical reaction in which an acid and a base combine quantitatively to generate a salt and water as products. A neutralization reaction involves the formation of water by the interaction of H+ ions and OH- ions.

To meet the rule of conservation of matter, which stipulates that matter cannot be generated or destroyed in a closed system, chemical equations must be balanced. A chemical equation’s balance is governed by the rule of conservation of mass. Water is formed when positive hydrogen ions from HCl and negative hydroxide ions from NaOH mix.

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Answer:

A. The green light is absorbed

The electron configuration for a neutral atom of iron (Fe) is [Ar] 3d^6 4s^2

The electron configuration is a way of describing the arrangement of electrons in an atom. It is written by listing the various electron shells and the number of electrons in each shell. In the case of iron, it has 26 electrons, which are arranged in the following way:

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6

The first two electrons go in the 1s orbital. The next two electrons go in the 2s orbital, and then six electrons go in the 2p orbitals. The next two electrons go in the 3s orbital, six electrons go in the 3p orbitals, and the last two electrons go in the 4s orbital. The last 6 electrons go in the 3d orbitals. The electron configuration shows that the last six electrons in the 3d orbitals are the valence electrons which are responsible for chemical reactions.

The element Iron (Fe) belongs to the group 8 of the periodic table, the elements of this group are known as transition elements, which have an incomplete d-subshell.

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The cells responsible for absorption in the small intestine are epithelial cells.

The small intestine is part of the digestive tract which consists of villi, circular muscles, longitudinal muscles, mucous lining, and epithelium. In the small intestine, a chemical digestion process occurs in which enzymes break down complex organic matter molecules into simpler molecules.

Epithelial cells are cells that line the surface of the small intestine in a cylindrical and cube-shaped intestine. On its surface there are villi that expand the surface of the intestine. Epithelial cells function to absorb simple molecules that have been digested chemically through enzymes secreted by the mucous glands, In addition, epithelial cells also play a role in protecting the intestine from microbial infections.

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Lattice enthalpy and hydration enthalpy both are always exothermic.

Lattice enthalpy is exothermic it involves the association of positively charged and negatively charged species. These species have an electrostatic forces of attraction to each other and can therefore released a lot of energy when bond is formed. [tex]Na^{+}[/tex] + [tex]Cl^{-}[/tex] → [tex]Na^{+}[/tex][tex]Cl^{-}[/tex]

Hydration enthalpy also exothermic in nature as water molecules surround the ions to form new forces of attraction. It depends upon ionic charge- greater the ionic charge stronger will be the ion-dipole interactions which is formed between the ions in the ionic lattice as well as water molecules.

[tex]M^{+}[/tex](g) + aq → [tex]M^{+}[/tex][tex]_{(aq)}[/tex]

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The water in the 5-gallon jug will fill 160 glasses.

According to the issue, a glass carries 4 ounces of water while a jug holds 5 gallons. We must convert the jug's volume from gallons to ounces and divide it by the volume of glass in order to determine how many glasses can be filled from it.

The water in the jug needs to be converted from gallons to ounces first. A gallon contains 128 ounces, hence 5 gallons of water equal 5×128 = 640 ounces.

The amount of water in the glass is then divided by the amount of water in the jug. If a glass holds four ounces, then 160 glasses can be filled from the jug, or 640 divided by four.

It's vital to note that we are converting between units in this problem using the rule that 1 gallon = 128 ounces. This conversion factor is based on the units of a gallon and an ounce, which are both common measurements.

We can simply convert gallons to ounces using this conversion factor, which enables us to perform the calculations required to get the solution.

In conclusion, by dividing the volume of the 5-gallon jug of water by the volume of glass, 160 glasses can be filled from it. To accomplish this, we must use a conversion factor to convert water measured in gallons to ounces.

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The products of the reactants: 3 Cu +2 AlCl₃ → 3CuCl₂ + 2Al.

A chemical equation involves reactants, formed products, and an arrow indicating the direction of the reaction.

The chemical equation in which the number of atoms of every involved element is equal on both sides of the equation is known as a balanced chemical equation.

The law of conservation of mass needed to be followed by a chemical equation. The total mass of the elements on the reactant side will be equal to the total mass of elements on the product side in any balanced chemical equation.

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Answer:

Plants are a resource of food and are also responsible for turning CO2 into O2

Explanation:

Answer:

3.25 Moles of Sulfur 8= 833.69 Grams

Explanation: I assumed you meant sulfur

Answer: His decision to add a fence to prevent his cows from straying will result in a long-term decline in the bobcat population. Most likely, the cows are being preyed upon by the bobcats when they stray and are fed in return. Because the cows are unable to cross a particular limit when the farmer constructs a fence, bobcats have less opportunity to hunt the cows.

Explanation:

1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.

To determine how many grams of sodium nitrate will be produced from 15.1 moles of silver nitrate, we need to perform a balanced equation and stoichiometry calculation.

The balanced equation for the reaction between silver nitrate and sodium chloride to form silver chloride and sodium nitrate is:

AgNO3 (aq) + NaCl (s) → AgCl (s) + NaNO3 (aq)

We know that 15.1 moles of silver nitrate will react with the stoichiometric amount of sodium chloride, which is 1 mole of sodium chloride for every 1 mole of silver nitrate.

So, we can calculate the moles of sodium nitrate that will be produced by multiplying the moles of silver nitrate by the coefficient of sodium nitrate in the balanced equation:

15.1 moles AgNO3 * 1 mole NaNO3 / 1 mole AgNO3 = 15.1 moles NaNO3

To convert the moles of sodium nitrate to grams, we can use the molar mass of sodium nitrate, which is 84.99 g/mol.

15.1 moles NaNO3 * 84.99 g/mol = 1284.689 g

So, 1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.

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Answer: ignitable gases, such as propane and butane.

Explanation:

That propellant may have hazardous characteristics such as being flammable (spray paint and lubricating sprays) and/or toxic (e.g. chlorinated solvent sprays or cleaning products). Most propellants in spray cans are mixtures of ignitable gases, such as propane and butane.

A debate among scientists on how new species form is based on speciation.

Divergence explains how organisms on Earth are related because it shows how species are similar or different.

Genes play the role in diversity of carrying information that results in changes from one generation to the next.

Natural selection is part of evolution because it explains why attributes are either in existence or have gone extinct.

One of the main debates among scientists on how new species form centers around the concept of speciation. There are two main hypotheses for speciation: allopatric speciation and sympatric speciation.

Divergence is the process by which different populations or species of organisms evolve from a common ancestor over time. This process is responsible for the diversity of life on Earth. By studying the similarities and differences between different organisms, scientists can infer evolutionary relationships.

Genes are the basic units of inheritance that carry information from one generation to the next. They play a crucial role in creating diversity among organisms. The genetic diversity of a population is the result of mutations, gene flow, and genetic drift.

The theory of natural selection is one of the most important and widely accepted explanations for the diversity of life on Earth. It is the process by which certain traits become more or less common in a population over time, depending on their impact on the survival and reproduction of the organisms that possess them.

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4.) Pb^+2 and CrO4^-2

When Pb^+2 and CrO4^-2 ions are dissolved in water, they will dissociate into their individual ions. The equation for this is:

PbCrO4 --> Pb^+2 + CrO4^-2

It's worth noting that these equations are showing the dissociation of the ionic compounds in aqueous solution. The degree of dissociation depends on the nature of the compound and the conditions of the solution, and it may not be 100%.

The percent yield of [tex]Fe_2S_3[/tex], according to the given parameters, would be  32.91%.

The percent yield of a particular product from a reaction is the actual amount of that product formed relative to the stoichiometric or theoretical amount that is supposed to be formed.

The percent yield of a reaction can be mathematically expressed as:

Percent yield = actual yield/theoretical yield x 100%

In this case:

Actual yield = 284 g

Theoretical yield = 863 g

Percent yield = 284/863 x 100

                      = 32.91%

In other words, the percent yield of [tex]Fe_2S_3[/tex] according to the given parameters would be 32.91%.

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Answer:

first answer is correct in accellus

Explanation:

Answer:

So the chemist can produce 418.7 grams of calcium phosphate.

Explanation:

We can start the problem by using the balanced chemical equation for the reaction and the stoichiometry to determine the amount of calcium phosphate that can be produced.

2K3PO4 (aq) + 3CaCl2 (aq) → Ca3(PO4)2 (s) + 6KCl (aq)

From the balanced equation, we can see that for every 2 moles of potassium phosphate (K3PO4) reacted, 1 mole of calcium phosphate (Ca3(PO4)2) is produced.

We are given that the chemist has 750.0 mL of a 1.8 M solution of potassium phosphate. We can convert this information into moles by using the formula:

moles = concentration x volume

moles = 1.8 M x (750.0 mL) / 1000 mL/L = 1.35 moles

To find the number of grams of calcium phosphate that can be produced we can use the molar mass of calcium phosphate which is 310.18 g/mol

grams = moles x molar mass

grams = 1.35 x 310.18 = 418.7 grams

So the chemist can produce 418.7 grams of calcium phosphate.

The amount, in moles, of carbon that are needed to produce 562 grams of carbon dioxide would be 12.77 mols.

Carbon dioxide can be produced from the reaction of carbon and oxygen according to the following equation:

[tex]C + O_2 --- > CO_2[/tex]

From the reaction, the mole ratio of carbon to carbon dioxide is 1;1.

Recall that: mole = mass/molar mass

Thus, the mole equivalent of 562 grams of carbon dioxide would be:

562/44 = 12.77 mol

This amount of carbon dioxide will also be the amount of carbon that will be required to react since the mole ratio is 1 to 1.

In other words, from the established stoichiometric mole ratio, the number of moles of carbon needed to produce 562 grams of carbon dioxide would be 12.77 mol.

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Answer: 2.7099 × 10²²  molecules

Explanation:

1 mole of H₂O₂ = 6.022 × 10²² molecules of  H₂O₂

No . of molecules in 0.45 moles of  H₂O₂ = 0.45 × 6.022 × 10²²

                                                                      =  45/ 100 × 6.022 ×  10²²  

                                                                       = 270.99 /100 ×  10²²

                                                                       = 2.7099 × 10²²  molecules

∴ The no. of molecules present in 0.45 moles of H₂O₂ are 2.7099 × 10²²  molecules .

Equipment not kept in your assigned lab drawer is called: Shared equipment

Departmental equipment are the set of things that is to be used by all the people of department and not necessarily have to be a research equipment. This kind of equipment mostly include some simple machineries and all purpose equipment that can also be used out of the laboratory.

Lab equipment are strictly research related things but can be used for various projects and not strictly used for a particular project. This kind of equipment can be used by research scholars as well as undergraduate or postgraduate student group.

Community equipment are also research related thing but unlike Lab equipment it is used by a group of students or research scholars who are involved in same project or similar kind of project and can't be shared commonly among all the students.

A shared equipment is research related thing but unlike Community equipment it is not shared among the scholars of similar kind of different projects. Shared equipment is assigned for a single group for a particular project and can be shared among the group members only. No members of the group can acquire it all alone.

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Answer:

In biological systems, matter is continuously changing states through chemical processes. For example, carbon in the form of the gas carbon dioxide is changed into glucose, a solid. This change, of course, occurs during photosynthesis.