mosely arranged Elements in an ascending order according to their atomic number by an increase........from the previous Element
fill the gap ​

The theoretical absolute minimum number of molar equivalents for a sodium borohydride reduction of a ketone like camphor is 1.

This is because sodium borohydride reduces ketones by forming an intermediate complex with the ketone, which then undergoes a boron-carbon bond cleavage to form an alkoxide and hydride ion. The hydride ion can then be abstracted from the alkoxide to form the alcohol product. Therefore, one equivalent of sodium borohydride is necessary to reduce one equivalent of ketone.

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This is the reaction that's why I have added an image kindly check the attachments.

What is an aromatic compound?

Organic compounds with one or more aromatic rings are referred to as "mono- as well as polycyclic aromatic hydrocarbons". Benzene is the parent compound of aromatic compounds. Before their basic chemical properties were understood, molecules were once grouped together based on smell, giving rise to the term "aromatic." The way that aromatic compounds are currently defined has nothing to do with how they smell. Since one of the heteroatoms—oxygen, nitrogen, or sulfur—replaces at least one carbon atom in the CH group, heteroarenes are chemical compounds that share many similarities. Furan, a heterocyclic compound with such a five-membered ring containing a single oxygen atom, as well as pyridine, a heteroatoms compound with a 6 ring containing only one nitrogen atom, are examples of non-benzene compounds to aromatic properties.

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Answer: When you overmix the muffin batter, it crushes the air bubbles and ruins the fluffy texture.

Explanation: → Follow this tip: To ensure a batch of light, fluffy muffins, mix the dry ingredients with the wet ingredients until just barely combined, and no more dry flour is visible.

Answer:

This depicts an electrolytic cell.

Answer:

(a) Mixture

(b) Pure substance

(c) Mixture

(d) Pure substance

Solid lead nitrate is heated and forms solid lead oxide, gaseous nitrogen dioxide, and oxygen then it form of decomposition reaction

Lead nitrate is a white color inorganic powder with the chemical formula Pb ( NO₃)₂ when Lead nitrate decomposes it produces Lead oxide a yellow colored oxide of  brown colored Nitrogen dioxide gas, and colorless Oxygen gas and also it gives yellow colors

When lead nitrate is heated it decomposes to form lead oxide, nitrogen dioxide and oxygen from the reaction, we can see that lead nitrate decomposes on heating and forms lead oxide, nitrogen dioxide and oxygen thus, lead nitrate on decomposition gives lead oxide, nitrogen dioxide and oxygen and the lead nitrate and when solid lead nitrate heated it decomposes to produce light yellow solid lead monoxide, reddish-brown nitrogen dioxide gas and colourless oxygen gas

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Answer:

There will be the formation of a Common salt (NaCl) and Mg(OH)2 which is a base after the reaction between the two chemicals

We need to know the molecular mass in order to determine the molecular formula from the empirical formula of a compound.

Molecular formula is formed from the actual number of elements that are involved in forming the molecule whereas empirical formula is the reduced ratio of the elements present in the compound.

We can determine the empirical formula of a substance by taking the subscripts of the molecular formula and reducing it to simplest whole number ratio.

we can calculate the molecular formula as:

n = molecular mass/ empirical formula mass

where n is any positive number.

Thus, when molecular mass is known , molecular formula can be determined form the empirical formula of a compound.

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Answer:

Energy can neither be created nor destroyed, but it does change its form. And not all forms of energy are usable and it gets dissipated as heat energy and sound energy. The energy that is wasted cannot be recovered.

The reaction is 2 C6H6 + 15 O2 -> 12 CO2 + 6 H2O.

What is combustion?

Combustion is the oldest technology known to mankind and one of our most significant discoveries or inventions. Combustion has been around for a very long time. Fire, along with earth, water, and air, was thought to be one of the four basic elements in the cosmos from antiquity through the mediaeval centuries. Combustion, explosion, and flame have all been observed and speculated since the dawn of time. Each culture has its own explanation. The Greeks explained combustion in terms of philosophical beliefs, one of which was that all fuel bodies included a "inflammable essence," which exited when the body was burned to react with air.

The reaction is:

C6H6 + O2 -> CO2 + H2O

Balance C:

C6H6 + O2 -> 6 CO2 + H2O

Balance H:

C6H6 + O2 -> 6 CO2 + 3 H2O

Balance O:

2 C6H6 + 15 O2 -> 12 CO2 + 6 H2O

The reaction is 2 C6H6 + 15 O2 -> 12 CO2 + 6 H2O.

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The mass of one mole of pennies is 1.326 × 1024 grams.

To determine the mass of one mole of pennies, we need to find the number of pennies in one mole and then multiply that by the mass of one penny. A mole of a substance is defined as the number of atoms, molecules or ions present in the substance and is equal to Avogadro's number, which is 6.022 × 1023.

Since one penny weighs about 2.2 grams, we can calculate the mass of one mole of pennies as follows:1 mole of pennies = 6.022 × 1023 pennies The mass of one mole of pennies = Number of pennies in one mole × Mass of one penny= 6.022 × 1023 × 2.2 grams= 1.326 × 1024 grams Therefore, the mass of one mole of pennies is 1.326 × 1024 grams.

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Answer:

The total number of Joules lost to the surrounding is  -837.2 J

Explanation:

Given that:

mass = 10 grams

initial temperature =  80°C

Final temperature = 60 °C

Specific heat of water= c = 4.186 J/g. °C

The total number of Joules lost can be determined by finding the amount of heat energy Q released by using the formula:

Q = mC ΔT

Q = 10 × 4.186 × (60 - 80)° C

Q = 10 × 4.186 × - 20° C

Q = -837.2 J

Thus, the total number of Joules lost to the surrounding is  -837.2 J

The term defined by the loss of a particle such as a proton as an atom tries to become stable is "loss of a proton." When an atom loses a proton, it becomes a different element with a different number of protons in its nucleus. This process is known as radioactive decay.

Radioactive decay is the process by which unstable atomic nuclei spontaneously lose energy by emitting ionizing particles or electromagnetic radiation. During this process, the nucleus may lose one or more particles such as protons or neutrons, or it may emit gamma rays, which are high-energy photons. As a result of this loss, the atomic mass and atomic number of the nucleus change, and the atom transforms into a different element with different chemical properties.

There are three types of radioactive decay: alpha decay, beta decay, and gamma decay. Alpha decay involves the loss of an alpha particle, which consists of two protons and two neutrons. Beta decay involves the emission of a beta particle, which is either an electron or a positron. Gamma decay involves the emission of gamma rays, which are high-energy photons.

The rate of radioactive decay is measured by the half-life, which is the time it takes for half of the radioactive atoms in a sample to decay. The half-life is unique to each radioactive isotope and can range from a fraction of a second to billions of years.

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Answer:

B

Explanation:

I think it is B. That is because when you are falling, your just going to fall faster and faster.

I hope this helps!

Answer:

B

Explanation:

The third force the jumper experiences is a spring force due to the bungee cord. The amount that the bungee cord pulls back on the jumper depends on how far the cord has been stretched, i.e. the farther the jumper has fallen, the more the cord pulls back on him or her.

Answer: zinc is less reactive than chlorine and therefore will not displace it.

Explanation: as we see in the reactivity series, chlorine is more reactive than potassium. a less reactive element will not displace (take the place of) a more reactive element. no reaction will occur.

The mileage rate of the car is approximately 52,383.55 meters per deciliter (m/dL) when given the average of 32.5 miles per gallon (mi/gallon).

To convert the mileage rate from miles per gallon (mi/gallon) to meters per deciliter (m/dL) using dimensional analysis, we need to apply conversion factors that relate the given units to the desired units.

Given:

Mileage rate = 32.5 mi/gallon

We can set up the dimensional analysis as follows, using the conversion factors:

32.5 mi/gallon * (1609.34 m/1 mi) * (1 gallon/3.78541 dL)

Let's break down the conversion factors used:

1 mi = 1609.34 m (conversion factor to convert miles to meters)

1 gallon = 3.78541 dL (conversion factor to convert gallons to deciliters)

Now, we can multiply the given mileage rate by the conversion factors:

32.5 mi/gallon * (1609.34 m/1 mi) * (1 gallon/3.78541 dL) = (32.5 * 1609.34) m/dL ≈ 52,383.55 m/dL

Therefore, the mileage rate of the car is approximately 52,383.55 meters per deciliter (m/dL) when given the average of 32.5 miles per gallon (mi/gallon).

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Answer:

the microscope

Explanation:

Robert Hooke was the first to use it

Answer:

microscope

Explanation:

As the cells very too tiny to be seen by our naked eyes, so invention of microscope led to cell theory

The scenario that best represents the production of goods and services that would be included in the U.S. GDP is Harvey, a Canadian citizen, who works in a U.S. owned auto assembly plant in Toronto.

The reason for this is that the GDP of a country includes all goods and services produced within its borders, regardless of the citizenship of the individuals involved. Since the auto assembly plant is owned by a U.S. company, the production of cars in the Toronto plant would be included in the U.S. GDP. On the other hand, Ian's peach growing, Leo's potato growing, and Samantha's sweet corn sales would not be included in the U.S.

GDP since they are not producing goods and services within the U.S. borders. It is important to note that only the value added to the production process within the country is counted towards the GDP, so the actual value of the car produced in Toronto would be the only amount included in the U.S. GDP.

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These facts serve as the best examples of how the tissues, organs, and organ systems in all living things collaborate to maintain homeostasis because contractile vacuoles are organelles that regulate water balance

Homeostasis is the term used to describe the body's need to achieve and preserve a specific state of equilibrium. A physiologist by the name of Walter Cannon first used the term in 1926. The tendency of the body to keep internal conditions, like blood sugar and temperature, at essentially constant and stable levels is known as homeostasis.

Between cells and an entire organ, there is a biological organisational level called tissue. An assembly of comparable cells and their extracellular matrix from the same origin that work together to perform a particular function is referred to as a tissue.

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The addition of a non-volatile solute into a solvent decreases its freezing point and increases its boiling point. Both these changes are colligative property. As the solute concentration increases, the changes also increases.

Colligative properties are those properties which depends on the amount of the substance. For example elevation of boiling point is a colligative property which increases with the concentration of the solute added.

When a non -volatile solute is added to the solvent, the solvent -solvent bonds becomes weaken and solvent -solute bonds make the solvent molecules difficult to escape into vapor phase. This will increase the boiling point.

Similarly, the addition of salt makes the solvent molecules in intact and the intermolecular force between solute-solvent molecules makes them easily freeze which leads to depression in freezing point.

Both these changes are colligative property. As the concentration of solute increases, the elevation of boiling point or the depression in freezing point increases.

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Answer:

CH4(g) +2O2____ CO2(g) +2H2O (l)

Answer:

CO2 is a compound cause there is more then one

The molar mass of Mg(OH)2 is 58.3 g mol−1.

The relative atomic mass of an element indicates its mass compared to the mass of atoms of other elements. Carbon has a relative atomic mass of 12 and magnesium has a relative atomic mass of 24. This means that each magnesium atom has twice the mass of a carbon atom. Atomic weights related to 1/12th the mass of a carbon atom are called relative atomic masses.

It is called the relative atomic mass because it compares the atomic mass to 1/12 the mass of a carbon atom. Relative mass is the average atomic mass of all isotopes present expressed as a percentage, and absolute mass is the sum of proton number and neutron mass. As the speed of an object approaches the speed of light, its relativistic mass m becomes infinite.

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The signal occurring at 2.3 ppm in a 300-MHz spectrometer would be 690 hertz downfield from the TMS signal.

Thus, the correct answer is 690 hertz.

To determine the signal occurring at 2.3 ppm in a 300-MHz spectrometer can be calculated by multiplying the chemical shift in ppm by the spectrometer frequency in MHz.

In this case, the chemical shift is 2.3 ppm and the spectrometer frequency is 300 MHz. Therefore, the signal would be 2.3 ppm x 300 MHz = 690 Hz downfield from the TMS signal.

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The water and the solutes leave the capillaries at the arterial end because the blood pressure is the greater than the osmotic pressure at the arterial end.

The blood pressure is the greater than the osmotic pressure at the arterial end and the water molecules  and the solutes leave the capillaries at the arterial end. At the arterial end of capillary, the blood pressure is exceeds the limit of the the osmotic pressure, that will causes the  net movement of the fluid out of the capillary.

Thus, due to the higher blood pressure than the osmotic pressure the solutes and the water leaves the artial end.

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Answer:

What do you mean need more details

Explanation:

Since a help device is a a communication gadget, we know that the help device will make use of radio waves.

A help device refers to a device that can be used for emergency communication. They are basically communication gadgets.

We must note that our communication gadgets such as television,  radio, cell phone etc all make use of radio waves. Hence a help device would make use of  radio waves.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

The spectra can be divided into two types viz., emission and absorption spectra. The differences between them are given below. 1) The emission spectrum is obtained due to emission of radiation from the substances. The absorption spectrum is obtained when the substance absorbs the radiation.

Explanation:

The dot structure that can be shown to be incorrect is the dot structure that has been shown by option A

The Lewis structure is based on the concept that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration similar to that of a noble gas. In the Lewis structure, the valence electrons of the atoms are represented as dots around the symbol of the atom.

We can see that in the dot structure that is in option A the both atoms are coming from the hydrogen atoms and shoud not be differently marked.

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Answer: The correct option is A) They have fixed energy values.

Explanation:

Electron is one of the sub-atomic particle present around the nucleus of an atom which is negatively charged.

In an atomic model, it is assumed that the electron revolves around the nucleus in discrete orbits having fixed energy levels.

These electrons when jumping from one energy level to another, some amount of radiation is either emitted or absorbed.

These fixed energy levels are given by the Bohr model and thus, the electrons are quantized.

Hence, the correct option is A) They have fixed energy values.

Answer: They have fixed energy values

Explanation: a pex