How can i calculate the concentration of 2.357g of sodium chloride in 75ml solution

The bond length of a chemical bond between bromine and sulfur is 216 picometers.

Given,

Covalent radius of bromine is 114 pm;

and  covalent radius of sulfur is102 pm.

∴  Bond length of the sulfur dibromide= Covalent radius of bromine +  covalent radius of sulfur

∴  Bond length = 114 + 102

∴  Bond length = 216 pm.

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Calculate electrons

Total electrons=10+2=12

The element is Magnesium with symbol Mg as atomic no is 12

Additional:-

M:-

Excited state of magnesium

Explanation:

There is an electrostatic force holding the electrovalent bonds together and they're usually structured, whereas in covalent, they are usually free and are only held together by a very weak intermolecular force

Answer:

0.5 M

Explanation:

Molar concentration : M = n/v

n = moles of solute

v = liters of solution

Hence, 5.0 / 10.0 = 0.5 M

Answer:

Solution. Carbonic acid is a dibasic acid with two replaceable hydrogen ions; therefore it forms one acid salt or one normal salt. Hydrochloric acid is a monobasic acid with one replaceable hydrogen ion and so forms only one normal salt.

Explanation:

1.2 L of hydrogen can be produced at a pressure of 2 atm and a temperature of 298 K.

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Step 1: Write the balanced equation

Mg + 2 HCl ⇒ MgCl₂ + H₂

Step 2: Calculate the moles corresponding to 2.3 g of Mg

The molar mass of Mg is 24.31 g/mol.

2.3 g × 1 mol ÷24.31 g = 0.095 mol

Step 3: Calculate the moles of H₂ produced

0.095 mol Mg × 1 mol H₂ ÷ 1 mol Mg = 0.095 mol H₂

Step 4: Calculate the volume occupied by the hydrogen

We will use the ideal gas equation.

P × V = n × R × T

V = n × R × T÷P

V = 0.095 mol × (0.0821 atm.L/mol.K) × 298 K÷2 atm

V =  1.2 L

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The speed of light through space is 300 million m/s .

There was a time when everybody thought that there is no limit for the speed at which an object can travel , but Einstein gave the limit which is the speed of light.

The speed of the light in vacuum travels at a speed of 300 million m/s .

Therefore The speed of light through space is 300 million m/s .

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The energy provided by the snack is obtained as 1254 J/g.

The calorimeter is used to measure the energy content of food. The food is burnt in the calorimeter in order to determine the amount of energy that it contains. The mass of the food burnt is converted to energy.

Mass of food burnt = 3.52 g - 1.52 g = 2 g

The energy that is provided by the snack in J/g = 2,508 J/ 2 g

= 1254 J/g

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The best explanation for why a firework being ignited is an example of an exothermic reaction and not an endothermic reaction is:

The fireworks give off heat.

Heat is emitted into the environment in an exothermic reaction. When a firework is lit, it undergoes a number of chemical processes inside the firework combination, which produces gases and produces a great deal of heat. Fireworks' distinctive visual display and audible effects are produced when heat is released as light and sound.

In contrast, heat is taken from the environment during an endothermic reaction. If a reaction were endothermic, it would need an outside energy source to continue, and because it would be absorbing heat from its environment, it would feel chilly to the touch.

However, because they release heat and energy and brighten the night sky, fireworks are instances of exothermic reactions.

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Answer:

B.) +6

Explanation:

To find the oxidation number of sulfur, we can assume the oxidation numbers of the other elements.

What I mean is, oxygen (O) always has an oxidation number of (-2). That being said, if there are 4 oxygen atoms, oxygen is contributing -8 overall. We also know that hydrogen generally has an oxidation number of (+1). Like before, if there are 2 hydrogens, it must be contributing +2.

If the overall molecule is neutral, we have to get these charges to balance out.

In essence, -8 + 2 + ? = 0?

If you combine the charges from oxygen and hydrogen, you are left with -6. Therefore, to make the molecule neutral, sulfur must have an oxidation number of +6.

When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.

What is the meaning of concentrated?

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution.

When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.

Since potatoes already contain sugar, less water will diffuse out of the potato placed in sugar water. The slice placed in water will be rigid since it will absorb water.

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Answer:

speed and direction are the two things

Answer:

sorry I don't know it I'm only 7 th grade

Explanation:

A physical change is one which can be reversed.it also does not produce any new substance.

changes in state such as the melting of a solid, the freezing and vaporization of a liquid as well as changes In shape are examples of physical changes

Al₂(SO₄)₃

= 2.Al+3.S+12.O

= 2.27 + 3.32+12.16

= 54+96+192

=342 g/mol

Answer:

Each sample has the same number of molecules.

Explanation:

This is true by Avogadro's law.

Answer:

An energy change occurs during the breaking and forming of bonds.

Explanation:

Answer:

An energy change occurs during the breaking and forming of bonds.

Explanation:

Energy changes occur when bonds are broken or formed.

When a bond is formed, energy is released.

When a bond is broken, energy is stored.

Edge 2022

Thermochemical Reactions Quiz answer

Translocation can be investigated by using radioactively labelled tracers, which are absorbed into glucose during photosynthesis.

Translocation can be defined as a biological process which involves the transfer (movement) of water and other soluble nutrients from one part of a plant to another, especially through the xylem and phloem.

Generally, translocation can be investigated by using radioactively labelled tracers, which are absorbed into glucose during photosynthesis. Also, an x-ray turns black when exposed to this biological process in plants.

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Answer:

This answer assumes that the strated "16.0g of iron" was meant to be 16.0 grams of iron(III) oxide.

Explanation:

To start, the thermite equation must be balanced.

I find:

1Fe2O3 + 2Al = 1Al2O3 + 2Fe

This tells us we need 2 moles of Al for every 1 mole of Fe2O3.  

Now calculate the moles of each reactant:

Moles Fe2O3:  16.0 g/159.7 g/mole = 0.100 moles Fe2O3

Moles Al:  8.1 /26.98 g/mole = 0.300 moles Al

The balanced equation says that in order to react all of the Fe2O3 we'd need twice that amount (in moles) of the Al.  (0.100 moles Fe2O3)*(2) = 0.200 moles Al.

Which of the two reactants is the limiting reagent?

We have more than enough moles of Al to react with 0.10 moles of Fe2O3.  (We have 0.300 moles Al and all we need is 0.200 moles to react with the 0.10 moles of Fe2O3.  Fe2O3 is the limiting reagent.

Calculate the maximum mass of iron of iron that could be formed using these quantities of reactants.

The balanced equation tells us that we will obtain 2 moles of Fe for every 1 mole of Fe2O3 consumed.  Since Fe2O3 is the limiting reagent, we will assume that it completely reacts.  That means 0.1 moles of Fe2O3 is reacted.  Since we expect twice that many moles of Fe, we should obtain 0.200 moles of Fe.  At 55.85 g/mole, we should obtain:

(0.200 moles Fe)*(55.85 g Fe/mole Fe) = 11.2 grams Fe

Answer:

Chemical reaction A, because the reactant is a compound

Explanation:

In a decomposition reaction, a compound is broken down into its components, so the number of products is greater than the number of reactants

Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.

When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

Although a chemical reaction is not always a "one-way street," as we'll examine further in the next section, an arrow is drawn between the reactants and products to denote the direction of the reaction.

 Our equation must have them in it in order for there to be an equal number of atoms of each element on both sides of the equation.

Therefore, Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.

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N₂ + 3H₂ → 2NH₃

moles N₂ = 1/3 x 6.25 = 2.083

Answer:

2.083 moles of N₂ would be required to react with 6.25 moles of H₂.

Explanation:

Let us first write the balanced chemical equation :

      N₂ + 3H₂ → 2NH₃

Therefore from this equation it is clear that:

3 moles of H₂ require 1 mole of N₂

∵ 1 mole of H₂ requires [tex]\frac{1}{3}[/tex]  moles of N₂

∵ 6.25 moles of H₂ requires [tex]\frac{(1*6.25)}{3}[/tex][tex]=2.083[/tex] moles of N₂

MOLE CONCEPT :

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter. A mole is defined as the amount of substance containing the same number of discrete entities (such as atoms, molecules, and ions) as the number of atoms in a sample of pure 12C weighing exactly 12 g. One Latin connotation for the word “mole” is “large mass” or “bulk,” which is consistent with its use as the name for this unit. The mole provides a link between an easily measured macroscopic property, bulk mass, and an extremely important fundamental property, number of atoms, molecules, and so forth.

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Answer:

5.02 mol

Explanation:

n(Al) : n(Cl)

2 : 3

x : 7.53

3x = 15.06

n(Al) = 5.02mol

9.06 L  is the volume of 0.24 mol oxygen (02) gas at 345 k and a pressure of 0.75.

The ideal gas law (PV = nRT) relates to the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

We know that the ideal gas equation relates the pressure, volume, temperature, and moles of gases as:

PV =nRT

This is a combined gas law based on other gas law like Boyle's law, Charle's law, Avagadro's law, Gay Lussac's law

P =  pressure = 0.75 atm

V = volume = ?

n = moles = 0.24 mol

R = 0.0821 L atm / molK  [gas constant]

T = temperature = 345 K

Putting the values

Volume =[tex]\frac{nRT}{ P}[/tex]

Volume = 0.24 X 0.0821 X 345 / 0.75

= 9.06 L

Hence, 9.06 L is the volume of 0.24 mol oxygen (02) gas at 345 k and a pressure of 0.75.

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Answer:

atomic mass = 16 amu

Explanation:

The atomic mass is the total protons and neutrons in an element. The atomic number represents the total number of protons.

In this form, the superscript (raised exponent) represents the mass number/atomic mass. The subscript represents the atomic number. Therefore, if the number (16) is the superscript, this must be your answer.

¹⁶₈Z  
-----> 16 = mass number/ atomic mass
-----> 8 = atomic number

Answer:

5.0 mol

Explanation:

From the coefficients of the equation, we know that for every 2 moles of Mn consumed, 2 moles of MnO are produced.

Thus, the number of moles of Mn consumed is equal to the number of moles of MnO produced, and thus the answer is 5.0 mol.

The moles of MnO formed with the reaction of 5 moles of Mn is 3 moles.

In a chemical reaction, the reagent that is present in a lesser quantity and governs the rate of the reaction is termed as the limiting reagent.

In the reaction of the formation of MnO, according to the stoichiometric law 2 moles of Mn reacts with 1 moles of Oxygen.

Thus, the moles of oxygen consumed by 7 moles of Mn is:

2 moles Mn = 1 mole O₂

7 moles Mn = 3.5 moles O₂

The available moles of O₂ = 5 mol.

The remaining moles of O₂ = 5-3.5 moles

The remaining moles of O₂ = 1.5 moles

The reaction of 5 moles Mn requires 2.5 moles of O₂, whereas the available moles of oxygen is 1.5 moles. Thus, oxygen serves as the limiting reagent.

The moles of MnO formed with the reaction of 5 moles Mn and 1.5 moles O₂

1 mole O₂ = 2 moles MnO

1.5 moles O₂ = 2 * 1.5 moles MnO

1.5 moles O₂ = 3 moles MnO

Thus, the moles of MnO formed with the reaction of 5 moles of Mn with the available oxygen is 3 moles.

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Answer:

protein molecule

Explanation:

Answer: Protein

Explanation:

Amino acids from protein molecules.

Answer:

D

Explanation:

The liquid loses energy while being cooled. It therefore changes to a solid when the liquid is cooled from a temperature above 80°C to 80°C

A substance has a melting point of 80 °C.  It will also change from a liquid to a solid at 80 °C while the liquid loses energy and the correct option is option D.

At the substance's melting point of 80 °C, it undergoes a phase transition from a liquid to a solid. During this transition, the substance loses energy to the surroundings as it releases heat to form a solid structure. The process is called solidification or freezing.

As the substance cools down from a higher temperature to 80 °C, its molecules lose kinetic energy, and they arrange themselves into a more ordered and stable lattice, resulting in the formation of a solid. This release of energy is why the liquid loses energy during the transition. Once the substance reaches 80 °C, it remains at this temperature until the entire amount has solidified.

Thus, the ideal selection is option D.

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Energy cannot be created nor destroyed, but it changes from one form to another. Hence, option C is correct.

Energy is the ability to do work.

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.

This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

Hence, option C is correct.

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Answer:

Ethyl magnesium Bromide

Answer:

a solution: for example when sugar is dissolved in water it becomes a sugar solution