When compound A (C5H12O) is treated with HBr, it forms compound B (C5H11Br). The 1H NMR spectrum of compound A has a 1H singlet, a 3Hdoublet, a 6H doublet, and two 1H multiplets. The 1H NMR spectrum of compound B has a 6H singlet, a 3H triplet, and a 2H quartet. Identify compounds A and B.

Answer:

Chemical energy refers to the storage of energy in chemical bonds

Explanation:

Chemical energy refers to the storage of energy in chemical bonds

Answer:

washing machine

Explanation:

the sound from a washing machine is not beneficial in any way

Answer:

The volume of stock solution needed to make the solution is 1875 ml

Explanation:

The parameters given are;

The volume of 75 M solution of H₂SO₄ = 400 ml

The concentration of stock solution = 16.0 M

Number moles per liter of stock solution = 16 moles

Number of moles in required 400 ml solution = 0.4×75 = 30 M

Volume of stock solution that contains 30 M = 30/16×1 = 1.875 l

The volume of stock solution that is required = 1875 ml

Answer:

Catalysts are chemically unchanged at the end of a reaction.

Explanation:

Catalysts only increase the chances of chemical reaction, without itself undergoing any kind of chemical change.

Answer:

its the process of increasing the rate of a chemical reaction

Explanation:

Answer:

4.Anything that has mass

Explanation:

In order to appreciate what matter is, we must first know that matter is the 'stuff' that makes up the universe. Everything in the universe is composed of matter. Matter in turn is made up of atoms. Intact mass is the quantity of matter in a body.

All matter must have mass and occupy space. Hence all matter must have a measurable mass. This is a fundamental property of all matter. Hence every object in the universe has mass because it is composed of matter. We find matter in our plates, spoons , clothes and indeed everything we see in the universe! For instance, you can measure the mass of a spoon because it is made of matter which has mass and occupy space.

Answer:

0.737M

Explanation:

C1V1=C2V2

2.50 x 0.442 = C x 1.5

1.105 = C x 1.5

C = 1.105/1.5

C = 0.737M

Answer:

To calculate the volume we must first find the number of moles

Number of moles (n ) = mass / Molar mass (M)

Since oxygen is diatomic

M of oxygen = 16 × 2 = 32g/mol

n = 16 / 32 = 0.5mol

Next we use the formula

V = n × V(dm³)

where V is the volume

V(dm³) is the volume of 1 mole of a substance at s.t.p which is

22.4dm³

Volume of oxygen gas at s.t.p is

0.5 × 22.4dm³

= 11.20dm³

Hope this helps you

Answer:

The new moles of the gas in the flask is 2.13 moles.

Explanation:

Given;

number of moles of gas, n = 1.9 mol

temperature of the gas, T = 21 °C  = 21 + 273 = 294 K

pressure of gas, P = 697 mmHg

volume of gas, V = ?

Apply ideal gas law;

PV = nRT

Where;

R is gas constant, = 62.363 mmHg.L / mol. K

V = nRT / P

V = (1.9 x 62.363 x 294) / 697

V = 49.98 L

New pressure of the gas, P = 795 mmHg

New temperature of the gas, T = 26 °C = 273 + 26 = 299 K

New moles of the gas, n = ?

Volume of the gas is constant because volume of the flask is the same when more gas was added.

n = PV / RT

n = (795 x 49.98) / (62.363 x 299)

n = 2.13 moles

Therefore, the new moles of the gas in the flask is 2.13 moles.

Answer:

the answer is pH

Explanation:

Just took it on ed2020

Answer:

The first part is pH

The second part is calibrate

The third part is all three

Using various concentrations of HCl and NaOH to measure a range of pH

Using an existing scale to determine pH

Knowing that the cabbage indicator always has the same color at a given pH value

Explanation:

Answer:

Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

The name of the Group 17 elements is called halogens

The group 17 elements are very reactive elements. Members of this group include:

The group 17 element are known to produce salts as they react with metals. Hence, they are called halogens

The group 17 elements are have 7 valence electrons and they required one electron to attain the stable octet configuration of the noble gas family.

From the above, we can see that the name of group 17 elements is halogens

Learn more about group 17 elements:

https://brainly.com/question/28295393

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Answer:

hey there,

ammonium chloride is the electrolyte substance in the Leclanche dry cell!

Explanation:

Answer:

The correct answer is liquid B.

Explanation:

Latent heat of vaporization also known as the latent heat of evaporation. This latent heat transforms the particles of liquid into a gas without affecting its temperature. For example, the latent heat of evaporation for water is 40.8 kJ per mole, that is, 40.8 kJ per mole of heat is needed to transform water into vapor at 373 K.  

It is known that latent heat of evaporation of a liquid is directly proportional to the cooling effect it generates, that is, more the latent heat of evaporation more will be its cooling effect. Thus, it is clear that liquid B will show the more cooling effect as the latent heat of evaporation of liquid B is more in comparison to liquid A. Thus, more heat will be captivated by liquid B and will generate more cooling effect in comparison to liquid A.  

Answer:

Sodium hydrogencarbonate or sodium carbonate

Answer:

Carbon dioxide

HAVE A GOOD DAY!

Answer:

Carbon Dioxide

Explanation:

Carbon dioxide is in the atmosphere and is an end product in organisms that obtain energy from breaking down sugars, fats and amino acids with oxygen as part of their metabolism.

Answer:

The answer is collision theory

I hope this helps you.

Answer:

180 Torr.

Explanation:

Step 1:

Data obtained from the question. This include the following:

Initial temperature (T1) = 127 °C

Initial volume (V1) = 400 mL

Initial pressure ( P1) = 120 Torr

Final volume (V2) = 200 mL

Final temperature (T2) = 27 °C

Final pressure (P2) =..?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

This is illustrated below:

Temperature (Kelvin) = Temperature (celsius) + 273

T(K) = T(°C) + 273

Initial temperature (T1) = 127 °C

Initial temperature (T1) = 127 °C + 273 = 400 K

Final temperature (T2) = 27 °C

Final temperature (T2) = 27 °C + 273 = 300 K

Step 3:

Determination of the final pressure.

This can be obtained by using the general gas equation as shown below:

Initial temperature (T1) = 400 K

Initial volume (V1) = 400 mL

Initial pressure ( P1) = 120 Torr

Final volume (V2) = 200 mL

Final temperature (T2) = 300 K

Final pressure (P2) =..?

P1V1/T1 = P2V2/T2

120 x 400/400 = P2 x 200/300

120 = P2 x 2/3

Cross multiply

P2 x 2 = 120 x 3

Divide both side by 2

P2 = (120 x 3)/2

P2 = 180 Torr.

Therefore, the new pressure exerted by the gas is 180 Torr.

Answer:

The correct option is;

Group 12

Explanation:

A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and  which forms a bright red compound with sulfur is mercury, Hg

The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.

Answer:

12

Explanation:

Answer:

A. the electric motor

Explanation:

A cell is a biological molecule which is the basic and functional unit of life. Cells undergo series of processes to function appropriately. ATP is an acronym for adenosine triphosphate, which is the source of energy for various cell processes.

In the given mechanical system, the electric motor provides the energy required energy to drive the system. Therefore, the electric motor has the same major function of providing energy for the system as the ATP in a cell.

Answer:

Which could cause topsoil to be lost?

a) wind and water erosion

Explanation:

A natural and common cause of soil erosion is Water. Water can carry away tiny soil particles.

Raindrops can impact the soil surface and can break down the aggregates in soil and scatter them.

Water runoff is another cause of soil erosion and this occurs when water on a slope isn’t absorbed into the soil or becomes trapped on the surface.

Loose particles can be picked up and carried away by the wind.

Soil surfaces can be worn down when struck by airborne particles carried by the wind.

B. Lack of use of the top soil rather helps the top soil to regain its nutrients.

c. Compaction can the topsoil from losing particles, since there are no loose particles to be picked up.

D. Desertification mostly causes the soil to lose its nutrients, not go away completely.

Hope this helps!

Answer:

The correct answer is A

Explanation:

Answer:

THE HEAT ON THE SURFACE OF THE EARTH

Explanation:

Answer:

Convection currents describe the rising, spread, and sinking of gas, liquid, or molten material caused by the application of heat.

Explanation:

Answer:

a) Y³⁺ > Eu²⁺ > Fr⁺ > Sr²⁺

b) Sr > Fr > Eu > Y

Explanation:

Y is the least reactive metal because it does not react with any of the other solutions.

Sr is the most reactive metal because it reacts with all of the other solutions.  

Sr + 2Fr⁺ ⟶Sr²⁺ + 2Fr

3Sr + 2Y³⁺ ⟶ 2Sr²⁺ + 2Y

Sr + Eu²⁺ ⟶ Sr²⁺ + Eu

Fr is more reactive than Eu because it reacts with Eu(NO₃)₂.

2Fr + Eu²⁺ ⟶ 2Fr⁺ + Eu

The order of reactivity is

Sr > Fr > Eu > Y

b) Reducing agents

In each of the above reactions. the more reactive metal is acting as a reducing agent — it is donating electrons to the cation of the other metal.

Thus, the order of activity of reducing agents is

Sr > Fr > Eu > Y

a) Oxidizing agents

The metal cations are the oxidizing agents.

The order of reactivity of the oxidizing agents is the reverse order of the reducing agents

Y³⁺ > Eu²⁺ > Fr⁺ > Sr²⁺

c) Standard reduction potential table

See the image below.

Answer:

A. Group 4

Explanation:

Also called carbon family or the tetrels

Answer:

4a

Explanation:

Answer:

a) Balanced  equation:

An  equation is called balanced if there are same number and same type of atom on both sides of the equation.

b)Reason:

2KClO3--------2KCl + 3O2

Consider this equation in the reactants there are 2KClO3  and in the product there are 2KCl+3O2 . So reactants =products which is a case of balanced chemical equation .

Explanation:

Answer :

Explanation For The Three States OF Matter On the Basis OF Characteristics Of Particles / Molecules OF Matter.

In solids the molecules are closely packed . There is a strong force of attraction between the molecules and the space between them is very small (almost negligible). The molecules are , therefore, not free to move . They merely vibrate their mean positions . This makes solids hard and difficult to compress , giving them a fixed shape and size.

In the case of liquids , the molecules are not closely packed. They do not attract each other as strongly as the molecules of solids. Thus, the intermolecular spaces are larger and the molecules are able to move about more freely . This makes liquid flow and take the shape of the container into which it is poured. Thus, liquids have a fixed volume but no definite shape of their own .

In the case of gases, the molecules hardly attract each other. They lie far a part from each other and the intermolecular spaces are, therefore, very large. . The intermolecular force of attraction is so weak that the molecules have great freedom of movement . As a result , gases have neither a fixed shapenor a fixed volume . They completely full up spacw available to them. They can be easily compressed as well, thus decreasing the gaps between their molecules .

Explanation :

Answer:

2.1056L or 2105.6mL

Explanation:

We'll begin by calculating the number of mole in 10g of Na2CO3. This can be obtained as follow:

Molar mass of Na2CO3 = (23x2) + 12 + (16x3) = 106g/mol

Mass of Na2CO3 = 10g

Mole of Na2CO3 =.?

Mole = mass /molar mass

Mole of Na2CO3 = 10/106

Mole of Na2CO3 = 0.094 mole

Next, we shall determine the number of mole CO2 produced by the reaction of 0.094 mole of Na2CO3. This is illustrated below:

Na2CO3 + 2HCl —> 2NaCl + H2O + CO2

From the balanced equation above,

1 mole of Na2CO3 reacted to produce 1 mole of CO2.

Therefore, 0.094 mole of Na2CO3 will also react to 0.094 mole of CO2.

Next, we shall determine the volume occupied by 0.094 mole of CO2 at STP. This is illustrated below:

1 mole of a gas occupy 22.4L at STP. This implies that 1 mole CO2 occupies 22.4L at STP.

Now, if 1 mole of CO2 occupy 22.4L at STP, then, 0.094 mole of CO2 will occupy = 0.094 x 22.4 = 2.1056L

Therefore, the volume of CO2 produced is 2.1056L or 2105.6mL

well, without the article, I'm guessing the main idea is about the Great Wall of China

Answer:

196 gdm-3

Explanation:

There are two major units of concentration, moldm-3 and gdm-3. The first unit refers to molar concentration while the second unit refers to mass concentration. Both units are useful in chemistry when describing the concentration of solutions as deemed expedient in each particular case.

Here we are required to compute the mass concentration from the molar concentration. We must recall that; mass concentration= molar concentration × molar mass

Let us first obtain the molar mass of H2SO4 from the relative atomic masses given=

2(1) + 32 + 4(16) = 98 gmol-1

Molar concentration of H2SO4 = 2 moldm-3

Mass concentration= 2 moldm-3 × 98 gmol-1

Mass concentration = 196 gdm-3

Answer:

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Explanation:

1. Particles are very far apart. (Gas)

2. Particles are moving quickly. (Liquid, Gas)

3. Particles can flow past each other. (Liquid)

4. Particles are very close together. (Solid)

Gas particles are very far apart from each other and move quickly. Liquid particles can flow past each other and can move quickly. Solid particles are tightly packed together.

Answer:

1) Gases (Gases are very very far apart)

2) Liquids, Gases (Liquids and Gases move freely because of weak interactive forces)

3) Liquid (Liquid has high fluidity and thus, has the ability to flow past each other)

4) Solid (Solid have particles very close to each other because of stronger attractive forces)

Answer:

Explanation:

Nanochemistry is a branch of nanoscience, deals with the chemical applications of nanomaterials in nanotechnology.

Nanochemistry involves the study of the synthesis and characterisation of materials of nanoscale size.