Which equation is NOT balanced?
A. 2H2 + O2® 2H2O
B. H2 + H2 + O2® H2O + H2O
C. 2H2 + O2® H2O
D. 4H2 + 2O2® 4H2O

Answer:

Autumn is one of the four basic seasons of the year in the temperate climate zone. It is characterized by moderate air temperatures with a decreasing daily average, and relatively high annual precipitation. The climate autumn is the period of the year in which the average daily air temperature ranges around 10° C.

Astronomical fall begins at the fall equinox and lasts until the winter solstice, which roughly means in the southern hemisphere between March 23 and June 22 (sometimes these dates are a day earlier or a day later, and in a leap year they may be additionally retracted one day). During astronomical autumn, the day time of the day is shorter than the night time, and moreover, with each successive day of the day it decreases and night increases.

C12H22O11 (s) + 12O2 (g) ⇒ 12CO2 (g) + 11H2O (g)

The  Lewis dot structure of SO₃  with oxygen and sulfur atoms is attached in the image below .

Lewis dot structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .

They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.

They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.

Learn more about Lewis dot structure,here:

https://brainly.com/question/20300458

#SPJ1

Nased on the mentioned informations, the student is calculated to have applied a force of 1,020 newtons to the soccer ball.

To calculate the force applied by the student to the ball, we can use the formula:

Force = mass x acceleration

We are given the mass of the soccer ball, which is 0.4 kg, and the acceleration of the ball, which is 2,550 m/s².

So, substituting the values in the formula, we get:

Force = 0.4 kg x 2,550 m/s²

Force = 1,020 N

Therefore, the student applied a force of 1,020 newtons to the soccer ball.

Learn more about force :

https://brainly.com/question/19045196

#SPJ4

The increase in temperature causes the concentration of NO at equilibrium to increase because the reaction shifts to the left in order to relieve the stress caused by the increased temperature.

LeChâtelier's principle states that when a system at equilibrium is subjected to a stress, it will shift in a direction that tends to relieve that stress. In the case of the reaction of nitrogen monoxide (NO) with oxygen to form nitrogen dioxide (NO2), increasing the temperature is a stress that disturbs the equilibrium of the reaction.

At higher temperatures, the reaction will proceed more quickly due to the increased kinetic energy of the reacting species. This means that more NO2 will be formed, causing the concentration of NO2 to increase. According to LeChâtelier's principle, the reaction will shift to the left in order to relieve this stress and restore equilibrium. This means that the concentration of NO will increase, while the concentration of NO2 will decrease.

To know more about temperature

https://brainly.com/question/11464844

#SPJ4

10 g of glucose present in 100g of water.

A hospital is a medical facility that provides patient care using specialized medical and medical support staff and medical equipment.

Hospitals and facilities are constructed, staffed, and equipped for the diagnosis of disease. For medical and surgical treatment of the sick and injured. And for their accommodation during this process. Modern hospitals often also serve as a testing and teaching centers.

Hospitals complement and enhance the effectiveness of many other parts of the healthcare system by providing ongoing services for both acute and complex illnesses. They focus scarce resources on a well-planned referral network to efficiently meet the health needs of the population.

Learn more about the hospital here:-https://brainly.com/question/1908877

#SPJ4

Answer:

Explanation:

What does this mean? It means that there are Z positive nuclear charges, and this determines the identity of the element. If the element is neutral, this means that there are precisely Z electrons, and the overall electronic charge is −Z . And thus the net ELECTRIC charge of the ATOM is Z+(−Z)=0 , i.e. zero .Oct 3, 2016

In the apothecary weight system, there are 3000 grains in 50 drams. The apothecary weight system was a historical system used for measuring weights in pharmacy and medicine.

In this system, one scruple is equal to 20 grains. This means that one scruple weighs 20 times as much as one grain. Furthermore, three scruples make up one dram. Therefore, a dram is three times the weight of one scruple, which translates to 60 grains (20 grains/scruple × 3 scruples/dram).

To determine the number of grains in 50 drams, we can multiply the number of drams (50) by the conversion factor of 60 grains/dram. This calculation gives us a total of 3000 grains. Hence, in the apothecary weight system, 50 drams would be equivalent to 3000 grains.

It's worth noting that the apothecary weight system is no longer widely used in modern medicine. The metric system and other standardized systems of measurement have largely replaced it.

Learn more about conversion here: brainly.com/question/32748716

#SPJ11

Answer: Fe2O3

Explanation: By applying crisscross method, the formula will be Fe2O3.

The decay constant (k) is approximately -0.001729 and the half-life (T1/2) is approximately 401.3 days.

To determine the decay constant (k) and the half-life of a radioactive nucleus, we can use the information given in the question.

The decay constant (k) is a measure of how quickly the material decays. It is related to the half-life (T1/2) of the material through the equation:

k = ln(2) / T1/2

where ln(2) is the natural logarithm of 2, approximately 0.693.

In this case, we are told that 75% of the material has decayed in 400 days. To find the decay constant (k), we need to use the following equation:

N/N0 = e^(-kt)

where N is the amount of material remaining, N0 is the initial amount of material, e is the base of the natural logarithm, k is the decay constant, and t is the time.

Let's use this equation to find the decay constant (k):

75% of the material has decayed, so 25% of the material remains. This means that N/N0 = 0.25.

Plugging in these values into the equation:

0.25 = e^(-k * 400)

To solve for k, we can take the natural logarithm of both sides of the equation:

ln(0.25) = -k * 400

Dividing both sides of the equation by -400:

k = ln(0.25) / -400

Using a calculator, we find that k is approximately -0.001729.

Now, let's find the half-life (T1/2) using the equation:

k = ln(2) / T1/2

Plugging in the value of k:

-0.001729 = ln(2) / T1/2

To solve for T1/2, we can rearrange the equation:

T1/2 = ln(2) / -0.001729

Using a calculator, we find that the half-life (T1/2) is approximately 401.3 days.

In summary, the decay constant (k) is approximately -0.001729 and the half-life (T1/2) is approximately 401.3 days.

Learn more about decay constant

brainly.com/question/31481071

#SPJ11

Answer: a)Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

b) Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

c) Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Explanation:

(a) Balanced formula equation:

(NH₄)₂S + FeSO₄ → (NH₄)₂SO₄ + FeS

Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

(b) Balanced formula equation:

Na₂SO₃ + CaCl₂ → NaCl + CaSO₃

Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

(c) Balanced formula equation:

CuSO₄ + BaCl₂ → CuCl₂ + BaSO₄

Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

\(Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2\), represents a set of possible chemical reactions that Fe(OH)3, or iron(III) hydroxide, can undergo.

In the first reaction, Fe(OH)3 is converted into Fe2O3, or iron(III) oxide, through the process of thermal decomposition. This reaction occurs when Fe(OH)3 is subjected to high temperatures, causing it to break down into Fe2O3 and water vapor.

In the second reaction, Fe2O3 is reduced to Fe, or elemental iron, through the process of electrolysis. This reaction involves passing an electric current through a solution of Fe2O3, causing the Fe2O3 to be reduced to Fe at the cathode and oxygen to be produced at the anode.

In the third reaction, Fe is converted into FeCl2, or iron(II) chloride, through the process of chlorination. This reaction involves adding chlorine gas to a solution of Fe, causing the Fe to be converted into FeCl2 and hydrogen gas.

In the fourth reaction, FeCl2 is converted into Fe(OH)2, or iron(II) hydroxide, through the process of acidification. This reaction involves adding an acid to a solution of FeCl2, causing the FeCl2 to be converted into Fe(OH)2 and hydrochloric acid.

Read more about Iron(Fe):

https://brainly.com/question/23408174

The correct question is:

Explain this chemical reaction \(Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2\)

The number of unpaired electrons calculated in [Co(NH3)6]3+ and [CoF6]3- are: 0 and 4. The correct option is (d).

The number of unpaired electrons in a complex can be determined by applying the crystal field theory.

For [Co(NH3)6]3+, the coordination number is 6 and the ligand is ammonia. Ammonia is a weak field ligand, meaning it creates a small crystal field splitting.

Since the oxidation state of cobalt is +3, it has three d electrons. These electrons will occupy the lower energy t2g orbitals before they occupy the higher energy eg orbitals.

Because of the small crystal field splitting, the energy difference between the t2g and eg orbitals is small, and therefore the electrons will be paired up in the t2g orbitals. Hence, there are no unpaired electrons in this complex.

For [CoF6]3-, the coordination number is 6, and the ligand is fluoride. Fluoride is a strong field ligand, creating a large crystal field splitting.

Because of the large energy difference between the t2g and eg orbitals, the three d electrons in the cobalt ion will first occupy the lower energy t2g orbitals before pairing up.

Therefore, there are four unpaired electrons in this complex.

To know more about "Crystal field theory" refer here:

https://brainly.com/question/28470709#

#SPJ11

It is difficult to draw a conclusive statement about the pHs of different categories of common substances because the pH of a substance is dependent on its specific composition. However, it is possible to make generalizations about certain categories of substances.

The pH of beverages can vary widely depending on their composition. Some common beverages such as water, milk, and pure fruit juices tend to have a pH close to neutral (pH 7). Other beverages such as carbonated soft drinks, energy drinks, and sports drinks tend to be acidic (pH less than 7) due to the presence of acids such as citric acid, phosphoric acid, and carbonic acid. Alkaline water and some herbal teas may have a pH greater than 7.

For example, acidic beverages are substances often associated with a higher risk of dental erosion and may be more likely to cause stomach discomfort in some individuals. On the other hand, alkaline beverages may have potential health benefits, but further research is needed to fully understand their effects on the body.

Learn more about pm pH here.https://brainly.com/question/172153

#SPJ11

Explanation:

In an atom,electrons(negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells

Niels Bohr proposed the atomic model in 1913. This model is based on the idea that electrons are located in energy levels that surround the nucleus. In order to keep the electrons from collapsing into the nucleus, Bohr proposed that there were specific energy levels that electrons could occupy.

The postulation of Niels Bohr's atomic model is as follows:When an electron is at its lowest energy level, it is said to be in its "ground state." When an atom absorbs energy, an electron can move to a higher energy level. When an electron returns to its ground state from a higher energy level, it releases energy in the form of light.In the Bohr model, the positively charged nucleus is orbited by electrons that are organized into discrete energy levels.

Each energy level is designated by an integer number, with the first energy level being closest to the nucleus and the highest energy level being the farthest away from the nucleus. Electrons cannot exist between energy levels, but they can jump from one energy level to another if they absorb or emit energy.

Know more about  Niels Bohr   here:

https://brainly.in/question/2899228

#SPJ8

Minerals can be located using geochemical surveys and remote sensors that analyze satellite images. Following that, mining or quarrying is used to remove many minerals.

To learn more about minerals refer to:

https://brainly.com/question/15844293

#SPJ4

One mole of O2 has approximately the same mass as one mole of methanol.

Recall that: mole = mass/molar mass, hence, mass = mole x molar mass.

O2 has a molar mass of 32 g/mol

Using the above equation, the mass of one mole of O2 will be:

Mass of 1 mole O2 = 1 x 32 = 32 grams

Methanol has a molar mass of 32 g/mol.

Mass of 1 mole \(CH_3OH\) = 1 x 32 = 32 grams.

In other words, 1 mole of O2 will have approximately the same mass as 1 mole of CH3OH.

More on mass and mole of substances can be found here: https://brainly.com/question/21042927

#SPJ1

The experimental yield of alum may be greater than, less than, or equal to the theoretical yield depending on factors such as reactant purity, reaction conditions, and product isolation techniques.

The theoretical yield of a chemical reaction is the maximum amount of product that can be obtained based on the stoichiometry of the reactants. It is calculated based on the balanced chemical equation and assumes that the reaction proceeds to completion without any side reactions, losses, or errors.

In contrast, the experimental yield is the actual amount of product obtained from a chemical reaction under real conditions. It is influenced by several factors, such as the purity of the reactants, the reaction conditions, the efficiency of the reaction, and the techniques used for product isolation and purification.

Therefore, the experimental yield of alum can be greater than, less than, or equal to the theoretical yield depending on these factors. For instance, if the reactants are impure or the reaction conditions are not optimal, the experimental yield may be lower than the theoretical yield due to incomplete reaction, side reactions, or losses.

On the other hand, if the reactants are pure and the reaction conditions are carefully controlled, the experimental yield may approach or exceed the theoretical yield. However, even under ideal conditions, it is rare for the experimental yield to match the theoretical yield due to experimental uncertainties and limitations.

In conclusion, the experimental yield of alum can vary from the theoretical yield depending on various factors, and the two values are not necessarily equal.

Careful experimental design and optimization can improve the yield, but some discrepancies are expected due to practical limitations and experimental uncertainties.

For more question on alum visit:

https://brainly.com/question/28299913

#SPJ11

Answer:

C.H2O has the highest boiling point.

I am not totally sure.

Hope it help you.

Answer:

143.991

Explanation:

47.997 * 3 = 143.991

Answer:

Hydrogen (H) “burning” initiates the fusion energy source of stars and leads to the formation of helium (He).

FUSION Reaction

Explanation:

mark me brainliest please.

Answer:

1. by not avoiding air bubbles from being trapped in the burette or pipette when filling them

2. not cross-checking the burette if it's slanted or vertically clamped

3. forgetting to rinse the pipette or burette with the solution to be used

4. not considering to take readings from the bottom of the meniscus with the eye level

5. finally, adding more than three drops of indicators to the pipetted solution

Explanation:

1. because the air bubbles will be mistakenly considered as part of the amount of the solution taken instead of that actually used up, and a higher titre value would be obtained

2. because if it's slanted, the acid level will be titled to one side and wrong reading will be recorded

3. rinsing to avoid diluting the acid or base with water that wets the burette or pipette

4. to avoid error of parallax and helps you to obtain accurate readings

5. excess burette solution than would normally have been consumed would be used up to change the colour of the indicator

Titration has been defined as the neutralization reaction for the acid and base, resulting in the formation of salt and water. It has been used for the determination of strength of acid and base.

The general source of error in titration has been;

The titration error has generally being manual error, and can be easily corrected.

For more information about titration, refer to the link:

https://brainly.com/question/24704707

Answer:

Therefore, 2 moles of oxygen will be required to oxidize 2.66 moles of oxygen. 72g of Aluminium will be completely oxidized by 44.8 lit of oxygen at STP.

Answer:

6

Explanation:

Electrons are floating around, and protons are outside of the nucleus center. The ones in the center are neutrons. I hope this helps.

Answer:

B. Type of music.

Explanation:

"how the type of music played in a room can affect plant growth."

The independent variable is the variable that is changed for the purpose of the experiment. The type of music is the independent variable here.

Covalent Bond.

Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).

Ethanol being both polar and non polar can dissolve covalent compound.

Answer:Superfatting is done for two reasons. The first is that extra oils add more moisturizing qualities to your soap (sometimes referred to as emollients). The second is that the common 5% superfatting allows you to a bit more leeway with your lye.

Explanation:What Are the Benefits of Using Excess Fat to Make Soap?

Written by Mustiin Soap

Handcrafted soaps with a little touch of essential oils and sweet, subtle fragrances can offer you a powerful bathing experience. While aroma enriches your mind, the excess fats, on the other hand, are the ones that enhance the overall impact on your skin. Whether made by a hot or cold process, adding fats is essential.

Adding excess fat or superfatting of soap benefits the soap’s moisturizing ability. Another significant benefit is its compatibility with the skin’s pH. As the soap has a pH of about 9.5, and the skin’s pH varies between 4.5-6. Superfatting is used to make the soap more skin-friendly.

You are an archaeologist who has just found an ancient fire ring containing charcoal fragments. You send these fragments to the lab for carbon-14 analysis. The report comes back that these fragments have 1/4 the amount of carbon-14, compared to modern wood. You use 5730 years as the half-life of carbon-14. You conclude the charcoal is about 11,460 years old

This estimate is derived from the observation that the fragments contain 1/4 the amount of carbon-14 compared to modern wood, suggesting that three half-lives, each equivalent to 5730 years, have passed since the charcoal was once alive.

Adjusting for the reduction factor of 1/4, the calculated age of the charcoal fragments is determined to be around 11,460 years.

To determine the approximate age of the charcoal fragments, we use the concept of carbon-14 decay and its known half-life. Carbon-14 is an isotope that undergoes radioactive decay over time, with a half-life of 5730 years.

Since the report states that the charcoal fragments have 1/4 the amount of carbon-14 compared to modern wood, it means that three half-lives have passed since the time the charcoal was once living. At each half-life, the amount of carbon-14 reduces by half.

Therefore, if we divide the time elapsed into three equal intervals (each representing a half-life), we can determine the age. Each interval is equivalent to 5730 years. So, three half-lives would be 5730 years + 5730 years + 5730 years = 17190 years.

However, we are interested in the age of the charcoal fragments, so we divide 17190 years by the reduction factor of 1/4 (due to having 1/4 the carbon-14 amount) to obtain 11460 years as an approximate age for the charcoal.

To know more about carbon-14  refer here

brainly.com/question/30556577#

#SPJ11

There are so many laws for ideal gas at constant temperature , at constant pressure, the law at constant volume is called Gay-Lussac's law. The pressure calculated is 1.555atm.

According to this law, pressure is directly proportional to temperature. This gas law is valid only to ideal gas not on the vanderwaal gas. Since it is mentioned in the question that volume is constant we can apply Gay-Lussac's law over here.

Mathematically

\(P_{1} T_{2} =P_{2} T_{1}\)

\(P_{1}\)= 1.50 atm

\(T_{1}\)=295 K

\(T_{2}\)= 305 K

Substituting all values given in the question

\(P_{2}\)=  (1.50 atm×305 K)÷295 K

  =1.555atm

Thus the pressure is 1.555atm

To know more about Gay-Lussac's law, here:

https://brainly.com/question/11387781

#SPJ1

Answer:

All of them have a nucleus..

Explanation:

Pretty simple stuff.  There's no cell without one.

Carlita’s body is made up of many cells. The one thing that all her cells have in common is they have the same kind of genes.

Genes are tiny pieces of spherical hereditary material that are bead-shaped and found on chromosomes. They hold the organism's genetic makeup. The number of genes on each chromosome is incalculable.

The hereditary material that makes up chromosomes is arranged in x shapes inside the nucleus. DNA, genes, and proteins make it up. An organism's genotype is distinct from other organisms because of its distinct genetic makeup, and this distinction can be passed down from one generation to the next.

Traits may be influenced by genes, the environment, or a mixture of the two. Quantitative features can also be qualitative, such as eye colour (such as height or blood pressure).

Therefore, numerous cells make up Carlita's body. Her cells all share the same type of genes, which is the only thing that unites them.

To learn more about genes, refer to the link:

https://brainly.com/question/8046559

#SPJ6