How many protons, neutrons, and electrons are present in an atom of zinc, Zn, with a mass
number of 65?

Answer:

It is B. OR C.

Explanation:

Answer:

B. Molecule

Explanation:

study island

Answer:

Option (B)

Explanation:

Na2SO4 (aq) + CaCl2 (aq) → CaSO4 (s) + 2 NaCl (aq)

The total number of electrons in the 3d orbitals of a titanium atom is 2. Therefore, the correct answer is (c) 2.

With an atomic weight of 47.90, a density of 4.54 Mg/m3, an atomic number of 22, and a melting point of 1670 C, titanium is a metal in group IVB of the periodic table. The chemical element titanium has the atomic number 22 and the symbol Ti. A transition metal with a silver colour, low density, and high strength that is resistant to corrosion in sea water, aqua regia, and chlorine can be created by reducing the only form it is found in nature—an oxide.

The total number of electrons in the 3d orbitals of a titanium atom is 2.

The 3d orbitals can accommodate a maximum of 10 electrons, distributed among the five 3d sub-orbitals: 3dxy, 3dxz, 3dyz, 3dx2-y2, and 3dz2. However, for a titanium atom, the electron configuration is [Ar] 3d2 4s2. This means that in the ground state of a titanium atom, only two electrons occupy the 3d orbitals.

Therefore, the correct answer is (c) 2.

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Answer:

yes, A double replacement reaction has two compounds as reactants.

hence it's true.......

Answer:

it's true...

Explanation:

The volume of 0.500-M KOH(aq) should be added to 100 ml of a buffer solution initially containing 0.13 mol HF and 0.16 mol of NaF is 100 mL of 0.500 M KOH. ka = 6.8 × 10⁴ and pH is 3.59

given that :

ka = 6.8 × 10⁴

and pH is 3.59

moles of HF = 0.13 mol

moles of NaF = 0.16 mol

the pH formula is given as :

pH = pka + log [base]/[acid]

pH = -log(6.8 × 10⁻⁴) + log (0.16 ) / 0.13

pH =  3.33  + 0.0899

pH = 3.5

Thus, the volume of 0.500 M KOH should be added to a buffer solution 0.500 M.

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Answer:

If FDA finds that the evidence supporting the proposed claim is credible and the claim can be qualified to prevent it from misleading consumers,

fda.gov

Explanation:

The elements in these noble gases are entirely inert, and their atoms have stable configurations of electrons.

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Answer:

D. 0.50

Explanation:

Use avogadro number to find the whole work.

Answer:

Molarity of the solution = 0.08 M

Further explanation

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

0.5 lb=226,796 g

MW silver nitrat - AgNO₃ = 169,87 g/mol

mol AgNO₃ :

Molarity :

Answer:

D

Explanation:

Divide the mass by the volume.

Answer:

Summary – Electrolyte vs Electrolysis

Therefore, the key difference between electrolyte and electrolysis is that electrolyte is a substance that can produce ions, whereas electrolysis is a process in which an electric current is used to drive a chemical reaction.

Explanation: brainliest please

Answer:

101.62 grams of water is given o when 62.1 g of propane burns.

Explanation:

Propane gas (C₃H₈) burns with oxygen gas and products carbon dioxide gas and liquid water. The balanced reaction is:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

By stoichiometry, the following amounts of moles of each compound participate in the reaction:

Being the molar mass of each compound:

By stoichiometry, the following mass quantities of each compound participate in the reaction:

Then you can apply the following rule of three: if by stoichiometry 44 grams of propane produces 72 grams of water, 62.1 grams of propane how much mass of water does it produce?

\(mass of water=\frac{62.1 grams of propane*72 grams of water}{44 grams of propane}\)

mass of water= 101.62 grams

101.62 grams of water is given o when 62.1 g of propane burns.

Answer:

Yellow

Explanation:

The color of the equilibrium mixture of Iodine Monochloride and Chlorine is yellow. When the mixture is heated, it becomes darker brown in color.

Answer:

144 N

Explanation:

Newton's 3rd Law: "For every action, there is an equal and opposite reaction."

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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Answer:

I would go with C

Explanation:

Because if in a group of scientists, the people that are educated with different experiences will be helpful to invent a new thing by giving their own ideas and mixing them.

Hope i got to be Helpful!

Answer:

2 oxygen atoms make oxygen gas

A molecule of oxygen gas is composed of two oxygen atoms chemically bonded together. The symbol for oxygen is "O," and the atomic number is 8, indicating that each oxygen atom has 8 protons in its nucleus.

A covalent bond is a type of chemical bond that occurs between two atoms when they share one or more pairs of electrons. It is a strong bond that holds atoms together to form molecules.

In a covalent bond, atoms share electrons in order to achieve a more stable electron configuration, typically by filling their outermost energy levels (valence shells). By sharing electrons, both atoms involved in the bond can achieve a more stable configuration, similar to the noble gas configuration.

In an oxygen gas molecule, the two oxygen atoms are held together by a covalent bond. Covalent bonds involve the sharing of electron pairs between atoms. In the case of oxygen gas, each oxygen atom shares two electrons with the other oxygen atom, resulting in a stable molecule.

Therefore, a molecule of oxygen gas is made up of two oxygen atoms (O) bonded together by a covalent bond.

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Answer:

The answer is Carnivore

Explanation:

A carnivore eat meat which is other animals.

Answer:

the mass is zero i think im not sure but yeah

Explanation:

Answer:

alcohol

Explanation:

Answer:

Explanation:

Asaturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. Table salt (NaCl) readily dissolves in water.

Acid rain results when humans put excess amounts of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere.

These pollutants are released primarily from industrial processes and the burning of fossil fuels, which then react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid. These acids then fall to the ground in the form of precipitation, known as acid rain.

Any type of precipitation that contains acidic elements, such as sulfuric or nitric acid, that falls to the ground from the atmosphere in wet or dry forms is referred to as acid rain, also known as acid deposition. This can apply to rain, snow, fog, hail, and even corrosive dust.

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There are dispersion intermolecular forces in a dimethyl ether.

Does dimethyl ether have a hydrogen bonding force?

An H-atom must be bound to an atom with a strong electronegative charge, such as F, O, or N. Since there are no H-atoms directly connected to O in dimethyl ether (CH3OCH3), ethers cannot form an H-bond.

Which molecule has stronger intermolecular forces, ethanol or dimethyl ether?

In a compound, the intermolecular forces will determine the surface tension. In contrast to dimethyl ether, which possesses dipole-dipole intermolecular forces, ethanol has an oxygen connected with a hydrogen, indicating that one of the forces is hydrogen bonding. So ethanol will have higher surface tension since hydrogen bonds are stronger than dipole-diple bonds.

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The concentrations for the second, third, and fourth dilutions would be 0.3M, 0.03M, and 0.003M, respectively.

In a serial dilution, a concentrated solution is successively diluted to obtain solutions with lower concentrations. In this case, starting with a 30M sucrose solution, a series of four 1/10 dilutions are performed. The first dilution involves making 100 mL of the 1/10 dilution. To answer question 20, the calculation for the first dilution needs to be shown. For question 21, a diagram of the serial dilution with labeled volumes and concentrations of the stock and dilution beakers needs to be drawn. Finally, for question 22, the concentration calculations for each dilution step need to be provided.

To calculate the first dilution, we need to determine the concentration of the resulting solution. Since it is a 1/10 dilution, the concentration would be 1/10 times the original concentration. Therefore, the concentration of the first dilution would be 30M / 10 = 3M.

For question 21, a diagram needs to be drawn to illustrate the serial dilution process. The diagram should include the stock solution with a volume of 30M, the first dilution beaker with a volume of 100 mL and a concentration of 3M, and labels indicating the volumes and concentrations at each step of the dilution process.

For question 22, the concentration calculations for each dilution step need to be provided. Starting with the first dilution at 3M, subsequent dilutions would be 1/10 of the previous concentration. Therefore, the concentrations for the second, third, and fourth dilutions would be 0.3M, 0.03M, and 0.003M, respectively.

Overall, these calculations and the diagram represent the process and concentrations involved in the serial dilution of the 30M sucrose solution.


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In an aqueous solution at 25°C, when [OH⁻] > [H₃O⁺], the true statement is  

1 x 10⁻¹⁰. Option D is correct.

In an aqueous solution, the concentration of hydroxide ions ([OH⁻]) and hydronium ions ([H₃O⁺]) are related through the concept of pH. At 25°C, a neutral solution has an equal concentration of hydroxide and hydronium ions, which means [OH⁻] = [H₃O⁺] = 1 x 10⁻⁷.

However, in the given scenario where [OH⁻] > [H₃O⁺], it indicates that the solution is basic. This means the concentration of hydroxide ions is greater than the concentration of hydronium ions.

Among the options provided, the only value that represents a concentration of hydronium ions smaller than 1 x 10⁻⁷ is D) 1 x 10⁻¹⁰. Therefore, the correct option is D.

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Answer:

i. The height of its jump is approximately 0.115 m

ii. The time of flight of its jump is approximately 0.306 seconds

iii. The range of its jump is approximately 0.795 m

Explanation:

The angle at which the grasshopper jumps, θ = 30°

The speed with which the grasshopper takes off, u = 3 m/s

i. The height of its jump 'h', is given by the following relation;

\(h = \dfrac{u^2 \times sin^2 \theta}{2 \times g}\)

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

Therefore;

\(h \approx \dfrac{3^2 \times sin^2 (30^{\circ})}{2 \times 9.81} = \dfrac{25}{218} \approx 0.115\)

The height of its jump, h ≈ 0.115 m

ii. The time of flight of its jump, 't', is given as follows;

\(The \ time \ of \ flight, \, t = \dfrac{2 \times u \times sin \theta}{ g}\)

Therefore;

\(t \approx \dfrac{2 \times 3 \times sin (30 ^ {\circ})}{ 9.81} = \dfrac{100}{327} \approx 0.306\)

The time of flight of its jump, t ≈ 0.306 seconds

iii. The range of the jump is given by the following projectile motion equation for the range as follows;

\(R = \dfrac{u^2 \times sin (2 \times \theta)}{ g}\)

Therefore;

\(R \approx \dfrac{3^2 \times sin (2 \times 30^ {\circ})}{ 9.81} = \dfrac{41659} {52433} \approx 0.795\)

The range of the jump, R ≈ 0.795 m.

Answer:

I hate chemistry good luck alice

Mass is an extensive property of a matter which describes the number of particles in a matter. According to the law of conservation of mass "mass can neither be created nor be destroyed." Hence mass is a quantity which never changes whether a particle is in a solid, liquid or gaseous state.