Lewis dot structure for diatomic molecule Cl2 S2 N2

Answer:

a

Explanation:

the answer to the question is a

Among the following chemical equations, redox reaction is [tex]3 MnO_2+4 Al\rightarrow 3 Mn +2 Al_2O[/tex].

The redox reaction can be defined as a reaction that involves the transfer of electrons between two species. Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.

Therefore, the correct option is B.

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Answer:

Animals benefit from photosynthesis, because they consume the plants and therefore the sugars stored in the plants from the process of photosynthesis for energy

Explanation:

Answer:

Tell students that sometimes when two (or more) substances are mixed together, a change occurs and another substance (or substances) is created. This is called a chemical reaction. Gas may form, heat may be produced, and color may change. These types of changes indicate that a chemical reaction has occurred.

Answer:

See explanation

Explanation:

Vinegar and oil have different densities, as such we expect the two substances to separate when mixed. However, oil constitutes the organic phase(water insoluble) while vinegar constituents the aqueous phase since it is water soluble.  Therefore, the two substances separate into layers when left to stand for a while.

The structure of lecithin makes it a good emulsifier. Hence, it can be able to cause oil and vinegar to mix, constituting a single phase when lecithin is stirred in.

Vinegar molecules and oil molecules are not attracted to one another. Lecithin is attracted to both vinegar molecules and oil molecules. Due to this attraction, lecithin can cause vinegar and oil to mix evenly.

Due to their immiscibility, oil and vinegar separate into layers when they are mixed together. Oil is non-polar, but vinegar (which is acetic acid that has been diluted) is polar. Because of their different polarity, these compounds are said to be "immiscible," which means they do not mix well or create a stable solution when combined. When you stir oil and vinegar together, the agitation causes them to mix to some extent at first, but the various interactions between their molecules cause them to quickly separate into distinct layers.

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Answer:

[tex]C_{54}H_{102}O_6[/tex]

Explanation:

Hello!

In this case, since the molar mass of the empirical formula is:

[tex]MM_{empircal}=9*12.01+17*1.01+16.00=141.26g/mol[/tex]

Thus, the ratio of the molecular to the empirical formula is:

[tex]\frac{847g/mol}{141.26g/mol} =6.0[/tex]

Thus, the molecular formula is six times the empirical formula:

[tex]C_{54}H_{102}O_6[/tex]

Best regards!

molar mass = (22.99) + (1.01) + (12.01) + 3(16.00)

molar mass = 84.01 g/mol

//

(508g)(1 mol/84.01 g) = 6.0

There are 6.0 moles of sodium bicarbonate

A 508-g sample of sodium bicarbonate (NaHCO3) contains 0.6 moles of sodium bicarbonate (NaHCO3)

Mass is defined as a dimensionless quantity representing the amount of matter in a particle or object. The SI unit of mass is kg.

Mole is defined as a standard scientific unit for measuring large quantities of very small entities

Molar mass = 22.99 + 1.01 + 12.01 + 3x16.00

                   = 84.01 g/mole

Moles of NaHCO3

= 508 g x 1 mole / 84.01

= 6.0 moles

Thus, 508-g sample of sodium bicarbonate (NaHCO3) contains 0.6 moles of sodium bicarbonate (NaHCO3)

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Answer:

A. 0.0625 moldm¯³

B. 6.125 gdm¯³

Explanation:

We'll begin by writing the balanced equation balance equation for the reaction. This is illustrated below:

2NaOH + H₂SO₄ —> Na₂SO₄ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ (nₐ) = 1

The mole ratio of the base, NaOH (n₆) = 2

A. Determination of the concentration of the acid in moldm¯³.

Volume of base, NaOH (V₆) = 20 cm³

Concentration of base, NaOH (C₆) = 0.2 moldm¯³

Volume of acid, H₂SO₄ (Vₐ) = 32 cm³

The mole ratio of the acid, H₂SO₄ (nₐ) = 1

The mole ratio of the base, NaOH (n₆) = 2

Concentration of acid, H₂SO₄ (Cₐ) =?

CₐVₐ / C₆V₆ = nₐ / n₆

Cₐ × 32 / 0.2 × 20 = 1 / 2

Cₐ × 32 / 4 = 1 / 2

Cross multiply

Cₐ × 32 × 2 = 4 × 1

Cₐ × 64 = 4

Divide both side by 64

Cₐ = 4 / 64

Cₐ = 0.0625 moldm¯³

Therefore, concentration of the acid in moldm¯³ is 0.0625 moldm¯³

B. Determination of the concentration of the acid in gdm¯³.

Concentration (moldm¯³) = 0.0625 moldm¯³

Concentration (gdm¯³) =?

Next, we shall determine the molar mass of the acid, H₂SO₄. This can be obtained as follow:

Molar mass of H₂SO₄ = (2×1) + 32 + (4×16)

= 2 + 32 + 98

= 98 g/mol

Finally, we shall determine the concentration of the acid in gdm¯³. This can be obtained as follow:

Concentration (moldm¯³) = 0.0625 moldm¯³

Molar mass of H₂SO₄ = 98 g/mol

Concentration (gdm¯³) =?

Conc. (moldm¯³) = conc. (gdm¯³) / Molar mass

0.0625 = Conc. (gdm¯³) / 98

Cross multiply

Conc. (gdm¯³) = 0.0625 × 98

Conc. (gdm¯³) = 6.125 gdm¯³

Thus, the concentration of the acid in gdm¯³ is 6.125 gdm¯³

Answer:

The answer is A.Newton's First law

Answer:

If we know that a reaction is an elementary reaction, then we know its rate law.

Explanation:

An elementary reaction is a reaction that takes place in one reactive encounter. This means that the two species interact in a single step to give the products.

If two reactants interact in a single step to yield the products then we can easily deduce the rate law from the reaction equation.

For instance, For the reaction;

2A + B → C

The rate law is

rate = k[A]²[B].

If the reaction is an elementary reaction and the equation of the reaction is balanced, then we can deduce the rate law from the balanced reaction equation.

Answer:

Describe the process for the separation of water and water soluble matter.

Sive an important difference of each of the following pair.

Solid and liquid

b. Liquid and gas

Solid and gas

d. Melting and freezing

Vapourization and condensation. f. Melting and sublimation.

Filtration and evaporation, 1. Sedimentation and decantation,

Homogeneous and heterogenous mixture

Water insoluble and water soluble matter

Write T for true and F for false statements.

All matters are visible.

Air is a matter.

The tiny particles of matter are called molecule.

தங்கம்

Answer:

Simple sugars are a type of carbohydrate.

Explanation:

Carbohydrates are one of the three basic macronutrients — the other two being protein and fat. Simple sugars are found naturally in fruits and milk, or they can be produced commercially and added to foods to sweeten, prevent spoilage, or improve structure and texture.

Answer:

A. Inheriting a specific gene

Explanation:

I hope this helps! ^^

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Answer:

A. inheriting a specific gene

Explanation:

because sickle cell anemia is caused by a mutation in the gene responsible for making hemoglobin that makes blood red and enable the rbcs to carry o2 from lungs to the whole body.

but both mother and father must pass the defective gene to the child to be sick with sickle cell anemia otherwise the child will carry the gene but shows no sign of the anemia.

stormwater pond .............

Coral reefs are believed to be the most diverse of any ecosystem. Hence it is most resilient to change due to its high diversity. Thus, option c is correct.

Coral reefs are sometimes referred to as the "rainforests of the sea" due to the richness of life that can be found there. The health of coral reefs is essential for around 25% of the ocean's fish. In the many crevices created by corals, fish and other species find shelter, food, breed, and raise their young.

More than 7,000 different kinds of fish, invertebrates, plants, sea turtles, birds, and marine mammals may be found here. Coral reefs offer chances for recreation, serve as a barrier against erosion and storm damage, and support local economies. They are also a source of fresh medications and food.

More than 500 million people rely on reefs for safety, income, and food. On and around reefs, fishing, diving, and snorkeling generate hundreds of millions of dollars for nearby businesses. Hence, option c is correct.

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Answer:

The sand bath spreads the heat out so that the flask is heated evenly. This reduces the chance of the flask breaking and ensures that there are no hot spots in the reaction mixture which could lead to excessive charring,

Explanation:

Answer:

An atom is the smallest unit of matter that retains all of the chemical properties of an element. Atoms combine to form molecules, which then interact to form solids, gases, or liquids. For example, water is composed of hydrogen and oxygen atoms that have combined to form water molecules.

Explanation:

Answer:

Atom is the smallest particle in the universe. An atom is made up of sub-atomic particles. They are the protons (positively charged particle), electrons (negatively charged particles) and neutrons neutrally charged particles). The lightest atom ever known is Hydrogen atom. An atom is electrically neutral. When a atom looses or gains and electrons it is called an ions.

Answer:

S5O7

Explanation:

Answer: The periodic table is a chart where different types of elements organized by what they have in common.

Explanation:

Answer:

Formula and structure: The chemical formula of sodium fluoride is NaF and its molar mass is 41.99 g/mol. It is a simple ionic compound, made of the sodium (Na +) cation and fluoride (F -) anion. The solid salt exists as cubic crystals similar to the crystal structure of sodium chloride (NaCl).

Explanation:

Answer:

the mesquite trees roots go down into the grown, while the saguaro cactus is going to the sides.

Answer:

:N:::N:

Explanation: 10 valence electrons betwwen the 2

need an octet

and N needs 5 for a neutral formal charge

An acceptable Lewis structure for a diatomic nitrogen molecule is

:N:::N: .Option C is correct. This is further explained below.

Lewis structure for a diatomic nitrogen molecule simply refers to the triple bond exists between two nitrogen atoms in the N2 Lewis structure.

In conclusion, The nitrogen molecule is diatomic, which means it is made up of two atoms of the same element.

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Answer:

CnH2n+2

Explanation:

Alkane have double and two atoms of hydrogen than carbon atoms

Like C4H10

n = 4

CnH2n+2

C4H2×4+2

C4H10

Answer:

thermal energy

Explanation:

Thermal conduction is the diffusion of thermal energy (heat) within one material or between materials in contact. The higher temperature object has molecules with more kinetic energy; collisions between molecules distributions this kinetic energy until an object has the same thermal energy throughout.

Answer:

energy is transferred when one molecule collides with another.

Explanation:

aP33x

Answer: 878 kJ of energy is there in cheeseburger

Explanation:

Given : calorific value of fat = 38kJ/g

calorific value of carbohydrate = 17 kJ/g

calorific value of protein = 17kJ/g

1 g of fat contains energy = 38 kJ

7.0 g of fat contains energy = [tex]\frac{38}{1}\times 7.0=266 kJ[/tex]

1 g of carbohydrate contains energy = 17 kJ

25 g of fat contains energy = [tex]\frac{17}{1}\times 25=425kJ[/tex]

1 g of protein contains energy = 17 kJ

11 g of protein contains energy = [tex]\frac{17}{1}\times 11=187kJ[/tex]

Total energy = (266+425+187) kJ = 878 kJ

Answer:

all letter cannot be created or destroyed just transformed

Answer:

A) boiling point higher than expected vapor pressure lower than expected.

Explanation:

When water is introduced with heat it vaporize at a temperature of 100 degree centigrade. When hydrochloric acid is added to the water its boiling point of water increases slightly. The difference in the boiling point is due to the presence of heavier molecules in acid.

Answer:

Explanation:

[tex]\text{The steps shown below indicate the rearrangement of the experiment.}[/tex]

[tex]\text{e. Add the crude reaction mixture to the separatory funnel}[/tex]

[tex]\text{f. Extract chloroaniIic acid by adding 5\%. HCl solution to the crude reaction mixture }[/tex]

[tex]\text{l. Mix/vent then drain off the aqueous layer}[/tex]

[tex]\text{i. Extract benzociane by adding 5\% NaOH solution to the organic layer}[/tex]

[tex]\text{c. Mix/vent then drain off the organic layer}[/tex]

[tex]\text{d. Add sodium sulfate to the aqueous layer to remove aw residual water}[/tex]

[tex]\text{a. Drain off the remaining organic from the tip of the separatory funnel}[/tex]

[tex]\text{h. Decant the into a round bottom flask and use the rotavap to evaporate solvent}[/tex]

[tex]\text{b. Weight out the product and determine Its MP}[/tex]