Propose a structure for an aromatic hydrocarbon, C9H12, that can form two C9H11Cl products on substitution of a hydrogen on the aromatic ring with chlorine. You do not have to consider stereochemistry. In cases where there is more than one answer, just give one. Ignore the ortho, para-directing effects of the alkyl groups in answering this question. Consider only the number of nonequivalent hydrogens on the aromatic ring.

Answer:

5.78 mol Li

Explanation:

Step 1: Define

Avagadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Step 2: Use Dimensional Analysis

[tex]3.48(10)^{24} \hspace{3} particles \hspace{3} Li(\frac{1 \hspace{3} mol \hspace{3} Li}{6.02(10)^{23} \hspace{3} particles \hspace{3} Li} )[/tex] = 5.78073 mol Li

Step 3: Simplify

We have 3 sig figs.

5.78073 mol Li ≈ 5.78 mol Li

Explanation:

The energy of electromagnetic radiation is given by :

[tex]E=h\nu[/tex]

Where, h is the Planck's constant

(a) A gamma ray, [tex]\nu = 1.64\times 10^{20}\ Hz[/tex]

Energy,

[tex]E=6.63\times 10^{-34}\times 1.64\times 10^{20}\\E=1.08\times 10^{-13}\ J[/tex]

(b) A microwave, [tex]\nu = 4.95\times 10^{10}\ Hz[/tex]

Energy,

[tex]E=6.63\times 10^{-34}\times 4.95\times 10^{10}\\E=3.28\times 10^{-23}\ J[/tex]

(c) A AM radio wave, [tex]\nu = 2\times 10^{6}\ Hz[/tex]

Energy,

[tex]E=6.63\times 10^{-34}\times 2\times 10^{6}\\E=1.32\times 10^{-27}\ J[/tex]

Therefore, this is the required solution.

Noun

a substance that takes part in and undergoes change during a reaction.

Answer:

charge

# of Valence

Electrons

# of Energy

Explanation:

Answer:

In the 3M NaCl solution, is plant will wilt and die due to loss of water from its cell as the solution is far too hypertonic.

In the 0.6M NaCl solution, this plant will thrive as the solution is a fairly 3% NaCl environment.

Explanation:

Molar mass of of NaCl = 58.5 g/mol, Density of water = 1 g/mL; 1 Litre = 1000  mL

3M or 3 mol/dm³ NaCl solution contains 3 moles of NaCl in 1 litre of solution.

3 moles of NaCl has a mass of 3 * 58.5 g = 175.5 g

Percentage solution = (175.7 g / 1000 g ) * 100 = 17.55% NaCl

0.6M or 0.6 mol/dm³ NaCl solution contains 0.6 moles of NaCl in 1 litre of solution.

0.6 moles of NaCl has a mass of 0.6 * 58.5 g = 35.1 g

Percentage solution = (35.1 g / 1000 g ) * 100 = 3.51% NaCl

In the 3M NaCl solution, is plant will wilt and die due to loss of water from its cell as the solution is far too hypertonic.

In the 0.6M NaCl solution, this plant will thrive as the solution is a fairly 3% NaCl environment.

Explanation:

E= m.c. delta T

67 = m . 0.46. 5

m = 67/(0.46*5)

m = 67/2.3

m= 29.13 g

Answer:

A dot drawn at the center of the circle represents the front C.

A circle is used to represent the back carbon.

There will be 3 lines drawn directly to each C atom.

Explanation:

A Newman projection is an alternative way to view a molecule instead of the sawhorse projection.

In a Newman projection, the front atom is shown as a dot at the center of a big circle while the back atom is shown as a circle. Three lines indicating binds to substituents are drawn to each carbon atom directly.

This method of representation of molecules was introduced by Melvin Spencer Newman in 1952 to partly replace Fischer projections. Fischer projections did not adequately show the conformer of a compound.

Answer:

The correct answer is "The 5 pesos stack coins will remain at its place".

Explanation:

According to Newton's first law "every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force". In this case, hitting a single 5 pesos coin at the bottom of the stack does not represent an external force with enough energy to move the stack considerably. Therefore, the 5 pesos stack coins will remain at its place since it tends to remain at rest as any other object.

Answer:

Attraction between the comet and the Sun

Explanation:

Answer:

Explanation: Ammonia is made out of one nitrogen and three hydrogen atoms. Its structure is tetrahedral. Ammonia is used in nitric acid production, as a fertilizer, and a cleaning solution.

NH3, normally found as a gas, it is caustic and harmful in longterm exposure. NH3 has a boiling point of -33 Celsius, and must be stored under pressure, or at low temperatures.

Ammonia is regulated in the United States as a substance that is a non-flamable gas. However, it still meets the definition of a material that is toxic by inhalation and requires a hazardous safety permit.

Ammonia is usually a gas with a pungent odor. Ammonia used commercially is usually named anhydrous ammonia. An exposure to a very high concentration of ammonia could result in lung damage and death

Ammonia is a gas with a strong smell. Its chemical formula is NH3. If exposed to a very high concentration of ammonia, it can cause lung damage and death.

Ammonia, NH3, is a compound that is has a strong smell. Even though the gas helps the nutrition of our planet, it can cause serious problems to our health.

Ammonia, NH3, is a pungent gas. It is colorless, and used to manufacture fertilizers and

The three in the chemical formula for ammonia means that there are three atoms of hydrogen in each molecule. The correct option is c.

Ammonia is a material that is classified in the US as a non-flammable gas. It nevertheless satisfies the criteria for a substance that is dangerous when inhaled and necessitates a hazardous safety permit.

Three hydrogen atoms and one nitrogen atom combine to form ammonia. It has a tetrahedral structure. Ammonia is a fertilizer, a cleaning agent, and is used in the manufacturing of nitric acid.

NH3 is typically found as a gas and, when inhaled over time, is corrosive and dangerous. NH3 must be stored under pressure or at low temperatures because it has a boiling point of -33 degrees Celsius.

Therefore, the correct option is c. atoms of hydrogen in each molecule.

To learn more about ammonia, refer to the below link:

https://brainly.com/question/15409518

#SPJ2

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 555 g

volume = 250 cm³

We have

[tex]density = \frac{555}{250} = \frac{111}{50} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

C

Explanation:

A Is false because physical properties can relate to any chemical substance.

B Is false because physical properties are apparent wether a chemical change has occurred or not.

C Is correct because physical properties can be observed without making a chemical change to the substance, chemical properties cause physical properties but a chemical change is not needed to observe a physical property.

D Physical properties describe compounds in all phases of matter.

1)The earth is made up of three different layers: the crust, the mantle and the core.

2) I think an earthquake is when the tectonic plates form together and progress movement which cause floor shakiness and everything falls.

3) Earth's interior layers are ordered by density. The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.

4) Earth's crust is divided into two types: oceanic crust and continental crust.

5)Surface waves travel along the surface. There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases; S-waves only travel through solids. Surface waves are the slowest, but they do the most damage in an earthquake.

6)Indirect observation involves the analysis of textual material generated either indirectly from transcriptions of audio recordings of verbal behavior in natural settings or directly from narratives.

7)The mantle is divided into several layers: the upper mantle, the transition zone, the lower mantle, and D” , the strange region where the mantle meets the outer core.

8)The outer core is not under enough pressure to be solid, so it is liquid even though it has a composition similar to the inner core. Sulfur and oxygen could be present in the outer core.

Answer:

When tardigrades have enough food and water to support their bodily functions, they live out the natural course of their lives, rarely lasting for longer than 2.5 years, according to Animal Diversity Web, a database run by the University of Michigan.

Explanation:

Answer:

[tex]m_{mixture}=52g[/tex]

Explanation:

Hello.

In this case, since your mixture is composed by sugar and water, its mass turns out:

[tex]m_{mixture}=m_{sugar}+m_{water}[/tex]

Whereas the mass of sugar is 2 g and the mass of water is 50 g, therefore, the result is:

[tex]m_{mixture}=2g+50g\\\\m_{mixture}=52g[/tex]

Best regards.

Answer:

ggv DDT gnrh h

Explanation:

assssssssassfggg

Answer:

You cannot make gold with bakery ingredients as gold is made with hydrogen and helium. Not everything follows the same recipe as some objects. There are different recipes for each material which makes sense because minerals aren't made of wheat. Those minerals feel like stone and act like stone, so it wouldn't be logical if it was crafted with flour, sugar and eggs.

Hope this helps.

Gold is a metal of higher value. It cannot be made by simply mixing any substance. Because every substance is made of its own atoms or molecules and it cannot be recreated by other atoms.

Gold is 79th element in periodic table. It is a transition metal placed in d-block elements. Gold is a precious metal have been used in ornaments and  other coatings.

Metals are hard, and they have some peculiar properties such as ductility, malleability. metallic luster etc. Gold is hard, shiny malleable and ductile and thus it can be easily modified into desired shapes and size.

Every substance is made of its own atoms and molecules. Gold is made of its atoms similarly, silver is made of its own atoms. In such a way everything is made by their characteristics atoms which cannot be recreated from other substances. It can only be produced from its minerals and ores.

Hence, gold cannot be produced from materials like rubber, strew ether etc.

To find more about gold, refer the link below:

https://brainly.com/question/14669985

#SPJ2

✅The racial numbers are all the numbers that can represent as the quotient of two numbers enter or, more precisely, an entity and a natural positive; The term "racial" refers to a fraction or part of a whole.

IamSugarBee

Answer:

The combination of localized and relocated connections is what allows the metalloid to be a transitional element between a metal and a non-metal. With that, it manages to be a solid and shiny element, but brittle.

Explanation:

A metalloid is also called ametal and has intermediate characteristics between metal and non-metal elements. they are characterized as solid, shiny, brittle and good idolizers of temperature and electricity, however, they assume the characteristics that metals present in relation to conductivity when they are heated. This is because the increase in temperature makes the electrons connected by weak bonds become free, making them semiconductors.

Answer:

+3

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). . In this compound, the cobalt atoms have a formal charge of +3.

Explanation:

Answer:

+3

Explanation:

(the roman numerals tells all)

Answer:

B)As you go from left to right, reactivity of metals increases. As you go down in a group, reactivity of metals decreases.

Explanation:

reactivity of metals can be explained as how it can easily lose electron, i.e oxidize as well as reaction with non-metals.

There are factors that influence the reactivity of metals such as

1)atomic radius

2)nuclear charge

3)shielding effect

4) The sublevel arrangement of electrons

In the periodic table,the group 1, known as alkali metals, are the most reactive metals

Therefore, as we from left to right, reactivity of metals increases. As we move down in a group, reactivity of metals decreases.

Answer:

Density

Explanation:

some objects are less dense so e.g balloons, they stand more chance of floating on water than other objects that have more density

Answer:

No

Explanation:

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 19.32 g/cm³

1 mL = 1 cm³

89.60 mL = 89.60 cm³

volume = 89.60 cm³

So we have

mass = 19.32 × 89.60 = 1731.072

We have the final answer as

Hope this helps you

Answer:

7.99 mol

Explanation:

Step 1: Given data

Molecules of chlorine gas: 4.81 × 10²⁴ molecules

Step 2: Calculate how many moles of chlorine gas corresponds to 4.81 × 10²⁴ molecules of chlorine gas

In order to convert molecules to moles, we will use Avogadro's number: there are 6.02 × 10²³ molecules of chlorine gas in 1 mole of molecules of chlorine gas.

4.81 × 10²⁴ molecules × (1 mol/6.02 × 10²³ molecules) = 7.99 mol