The main component of smog is NO2(g). Smog is a product that is formed through the following series of intermediate chemical reactions.

The number of mole of NaCl required to prepare the solution is 0.467 mole

The molality of a solution is simply defined as the mole of solute per kilogram of water. It is expressed mathematically as

Molality = mole / mass (Kg) of water

Molality = mole / mass (Kg) of water

0.875 = mole of NaCl / 0.534

Cross multiply

Mole of NaCl = 0.875 × 0.534

Mole of NaCl = 0.467 mole

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Since the helium gas has a volume of 1.00 L, the final volume of the helium gas is 1.00 L

To find the volume, we need to know the general gas law.

The general gas law is given by P₁V₁/T₁ = P₂V₂/T₂ where

So, making V₂ subject of the formula, we have

V₂ = P₁V₁T₂/T₁P₂

Since the sample of helium gas has a volume of 1.00 L and both the pressure and kelvin temperature each double, we need to find its final volume.

So,

So, substituting the values of the variables into the equation, we have

V₂ = P₁V₁T₂/T₁P₂

V₂ = P₁V₁ × 2T₁/T₁ × 2P₁

V₂ = V₁

V₂ = 1.00 L

So, the final volume of the helium gas is 1.00 L

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Answer: 0 K

Explanation:

This is a fact - absolute zero is defined as 0 degrees Kelvin.

The compression factor based on the information given is 0.083.

The way to calculate the compression factor goes this:

V(ideal) = RT/P

= (0.0821 × 250)/15

= 1.368

V(real) will be:

= V(ideal)/12

= 1.368/12 = 0.114

The compression factor will be:

= 1.368/(12 × 1.368)

= 0.083

Therefore, the compression factor is 0.083.

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Answer:

Its a good conductor because its a metal

Answer:

periodic table

Explanation:

in its magnetic properties and chemical activity it resembles iron and cobalt

Answer:

Option A, 66.5

Explanation:

use q (heat) = m(mass) * cp(specific heat) * deltat (change in temp)

q= 1172, m = 45.8, cp = 0.385

1172= (45.8) * (0.385) * Delta T

1172= 17.633 *DeltaT

1172/17.633 =DeltaT

66.5 =DeltaT

The trend in electronegativity values across period 3 from sodium to chlorine is that sodium with 11 protons is the least electromagnetic element and chlorine with 17 protons is the most electronegative element.

It should be noted that electronegativity simply means a chemical property that describes the tendency of an atom to attract elements towards it.

In this case, the trend in electronegativity values across period 3 from sodium to chlorine is that sodium with 11 protons us the least electromagnetic element and chlorine with 17 protons is the most electronegative element.

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Answer:

Answer

Explanation:

1) Other gasses / or argon (based on what u took in ur school )

2) oxygen

3? Nitrogen

Answer:

By volume, the dry air (which i'm assuming that's what either the blue or red is) in Earth's atmosphere is about 78.09 percent nitrogen, and 0.93 percent argon (which might be what red is (if the red isn't dry air)). A brew of trace gases accounts for the other 0.03 percent (which I think that might be the yellow), including the greenhouse gases carbon dioxide, methane, nitrous oxide and ozone.

Explanation:

9-fluorenone is a limiting reagent and theoretical yield.

Fluoren-9-ol is a member of the class of hydroxyfluorenes that is 9H-fluorene substituted by a hydroxy group at position 9.

Inspect stoichiometry of the given reaction as per the balanced equation below:

[tex]4C_{13}H_8O + NaBH_4 + 4CH_3 OH[/tex] → [tex]4C _{13} H _{10} O + NaB(OCH_3 )_4[/tex]

Given weight:

0.6 grams methanol

0.05 grams 9-fluorenol

0.792 [tex]NaBH_4[/tex]

Out of the three reactants, [tex]NaBH_4[/tex] acts as a reducing agent only and hence the reaction can occur only when [tex]NaBH_4[/tex] is present in relatively much smaller amounts. But the yield of the product,9-fluorenol, is not governed by its quantity.

Theoretically, when equimolar amounts of reactants ( 9-fluorenone and methanol ) are taken for reaction in presence of [tex]NaBH_4[/tex] an equivalent quantity of product, 9- fluorine is obtained, as inspected in the above stoichiometric relations. But practically we have used a lesser number of moles of 9-fluorenone than theoretically needed, hence in this case it should serve as the limiting reagent.

9- fluorenone, methanol & [tex]NaBH_4[/tex] are the reactants, while the product 9-fluorenol would be obtained = 0.0033 moles

This would represent the theoretical yield of the product 9-fluorenone, as we have used an excess of methanol thus facilitating the reaction to go to completion.

Hence, 9-fluorenone is a limiting reagent.

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The molecules of the green food coloring would disperse throughout the water.

i) In a few hours, the molecules of the green food coloring would have started dispersing throughout the water from the region of higher concentration to the region of lower concentration.

ii) In several days, the molecules would have uniformly dispersed through the water.

b) According to the kinetic theory of particles, matters, irrespective of their nature, are made up of small molecules that are in constant random motion. The direction and pace of movement depend on the energy they possess as well as the kind of relationship that exists between the small molecules.

c)The process that takes place in the experiment is known as diffusion.

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It is a tension created by the attraction of molecules to the surface by the molecules in a bulk of a solution.

The attraction force present between water molecules is cohesion force.

The phenomenon of surface tension provides two major characteristics to the water:

Plants take water from soil using it's roots , and water is travelling through the xylene tissues present in a plant , so the cohesion forces present in water helps it to travel to the higher places in plants.

While in case of animals, this attraction forces increases the surface density which helps to insects to walk on to the water surface.

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Answer: Decomposition

Explanation:

Decomposition reactions involve a substance breaking down into simpler substances.

0.227L is the volume of a 3.95 M potassium chloride solution that would be needed to make 325 mL of a 2.76 M solution by dilution.

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Moles of KCl in new solution

0.325dm³ x (2.76mol/dm³)

= 0.897mol.

Hence volume needed

0.897mol ÷(3.95mol/dm³)

= 0.227dm³ or 0.227L.

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Answer:

Amm is this right (if is it the right so mark me the brainliest pls)

Explanation:

Answer : Solutions- Brine, Soda water. Suspensions- Muddy river water, Chalk water mixture, Milk of magnesia, Smoke in air. Colloids- Milk, Ink, Blood, shaving cream.

The constituents of petroleum that are used for the following purposes are as follows:

The constituents of petroleum are LPG, bitumen, paraffin wax, lubricating oil, kerosene, diesel, etc. These compounds are a mixture of hydrocarbons.

Therefore, each constituent of petroleum that is used for the following purposes is mentioned above with proper names.

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Answer: A is unreactive and D is reactive.

Explanation:

A is neon, which is a noble gas, and thus unreactive.

D is sodium, which is an alkali metal, and thus highly reactive.

the mr-vp tests are part of a battery of tests called imvic tests. these tests are useful in identifying and differentiating  Gram-positive cocci.

mr-vp tests can be regarded as a test that is used in the determination of fermentation pathway that is required in glucose.

It is used in mixed acid fermentation pathway and can be used in  identifying and differentiating  Gram-positive cocci.

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Answer:

addition polymerization

Explanation:

Answer:

Chemical equation

       CaCo3 → CaO+ CO2      (Decomposition reaction)

A chemical reaction that results in the breakdown of one reactant into two or more products is known as a decomposition reaction.

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Answer:

chemical equation

Explanation:

Explanation:

NaCl is the compound that we want to know the Bonding structure of

in chemistry when a metal (Na) combines with a non metal (Cl) it is know as an ionic compounds

the type of bonding in ionic compounds is an ionic bond

Answer:

the temperature of the system decreases

The conclusion that is consistent with the ionic equation would be that COS (s) is a precipitate.

It is a reaction in which 2 soluble salts in aqueous forms react to produce an insoluble salt as one of the reaction's products.

Precipitate products are usually insoluble and can be filtered off using suitable filter paper. In other words, they are solids that are suspended in solution.

Following the ionic reaction, the two reacting ions are in aqueous forms while the product formed is solid.

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There are two subshells that are s and p, which are present in the second energy level.

The energy level can be defined as the fixed distances from the nucleus of an atom where electrons may be found. Each energy level is divided into some Subshells. These subshells are known as s-subshell, p-subshell, d-subshell, and f-subshell. This subshell contains some orbitals, these orbitals are the place where there is the maximum probability of getting the electrons. In one orbital, a maximum of two electrons can be present.

Hence, there are two subshells in the second energy level.

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Ionic compounds such as sodium chloride, which dissolve in water and dissociate to form ions, are called electrolytes.

Electrolytes are substances that have a natural positive or negative electrical charge when dissolved in water.

Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.

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It is evident from the provided map that the African Ocean is enlarging at a divergent plate boundary. So, the correct option is B.

When two tectonic plates diverge from one another, the area is known as a diverging plate border. New crust forms on the plate margins when the plates divide and magma rises from the mantle to fill the space. The creation of mid-ocean ridges is a result of this process, known as seafloor spreading.

Divergent plate borders can also occur on land, and they can eventually result in the formation of new ocean basins by forming rift valleys. The spreading of the seabed is aided by the divergent limits in the middle of the ocean. A fracture occurs on the ocean floor as plates made of oceanic crust move apart from one another.  

Therefore, the correct option is B.

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Your question is incomplete, most probably the complete question is:

This map shows the age of the Atlantic’s oceanic crust. Which statement is supported by the information in the map?

A. The African continental plates are undergoing continental drift.

B. The African Ocean is growing wider at a divergent plate boundary.

C. The seafloor is shrinking along a convergent plate boundary.

D. The seafloor is undergoing subduction under the North America plate.

The weak acid will have fewer ions than the strong acid of similar concentration.

The chemical reactions for a weak acid and a strong acid is given below:

Strong acids are acids which dissociate completely in solutions. Examples of strong acids are hydrochloric acid and sulfuric acid.

Weak acids are acids which dissociate only partially in solutions. Examples of weak acids are carbonic acid and acetic acid.

Weak acids of a similar concentration to a strong acid have fewer hydrogen ions.

The equation of the dissociation of strong acids and weak acids are given below:

In conclusion, weak acids produce few ions in solution while strong acids fully dissociate into ions in solution.

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Answer:

Approximately 11460 Years Old

Explanation:

i looked this up :/

way to much maths for me

The age of the bone given that it contains C-14 and N-14 in ratio of 1:3 is 11460 years

C-14 is usually used for radioactive dating (i.e to determine the aga of substance)

From the question, C-14 and N-14 exist in ratio of 1:3.

thus, the amount of C-14 remaining can be obtained as follow:

Percentage of C-14 remaining = 1/4 × 100

Percentage of C-14 remaining = 25%

2ⁿ = N₀ / N

2ⁿ = 100 / 25

2ⁿ = 4

2ⁿ = 2²

n = 2

t = n × t½

t = 2 × 5730

t = 11460 years

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