4. How many moles are in 375 L of O2?​

Answer:

the outcome of something

The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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Answer:

Joule is the SI unit of work. 1 Joule is amount of work done when a force of 1 Newton displaces a body through a distance of 1m in the direction of the force applied.

The expected pH of the resulting solution is about 1.40. However, it's important to note that the answer choices provided in the question do not include this value.

Hydrochloric acid (HClO) is a strong acid, so it completely dissociates in water:

\(HClO(aq) = H^+(aq) + ClO^-(aq)\)

The initial concentration of HClO is 0.100 M, and 50.0 mL of 0.200 M NaOH is added to 250.0 mL of the HClO solution. The reaction that occurs is a neutralization reaction:

\(H^+(aq) + OH^-(aq) = H_2O(l)\)

The balanced equation shows that one mole of HClO reacts with one mole of NaOH. Therefore, the number of moles of HClO in the initial solution is:

n(HClO) = C(HClO) × V(HClO) = 0.100 mol/L × 0.250 L = 0.025 mol

When 50.0 mL of 0.200 M NaOH is added, the number of moles of NaOH added is:

n(NaOH) = C(NaOH) × V(NaOH) = 0.200 mol/L × 0.050 L = 0.010 mol

Because NaOH is a strong base, it completely dissociates in water:

\(NaOH(aq) = Na^+(aq) + OH^-(aq)\)

All of the \(OH^-\) ions react with \(H^+\) ions to form water. Therefore, the remaining \(H^+\) ion concentration is:

\([H^+] = [HClO] - [OH^-]\) = (0.025 mol)/(0.250 L + 0.050 L) - (0.010 mol)/(0.050 L) = 0.040 M

The pH of the solution is given by:

\(pH = -log[H^+]\) = -log(0.040) ≈ 1.40

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The balanced chemical equation:

\(2 KNO_3 + H_2CO_3\)  → \(K_2CO_3 +2 HNO_3\)

\(KNO_3\) is the limiting reactant.

81.5% is the theoretical yield of potassium carbonate.

What is a balanced chemical equation?

A balanced equation contains the same number of each type of atom on both the left and right sides of the reaction arrow.

\(2 KNO_3 + H_2CO_3\)  → \(K_2CO_3 +2 HNO_3\)

According to the equation, n (\(KNO_3\)) = 2 x n (\(H_2CO_3\)) = 2 x n (\(K_2CO_3\))

n =\(\frac{m}{M}\)

M (\(KNO_3\)) = 101.1 g/mol

M (\(H_2CO_3\)) = 62.03 g/mol

M (\(K_2CO_3\)) = 138.2 g/mol

n (\(K_2CO_3\)) = \(\frac{8.45}{138.2}\) = 0.061 mol

n (\(KNO_3\))available = \(\frac{15.15}{101.1}\) = 0.15 mol

n (\(H_2CO_3\)) = 0.228 mol

The required amount of n (\(KNO_3\)) = 2 x n (\(H_2CO_3\)) = 2 x 0.228 = 0.456 mol.

This is more than the available amount (0.15 mol).

That is why \(KNO_3\) is the limiting reactant.

Due to this, the anticipated amount of \(K_2CO_3\) is:

n (\(K_2CO_3\)) = 1/2 x n (\(KNO_3\)) = \(\frac{0.15 }{2}\) = 0.075 mol

m (\(K_2CO_3\)) = n x M = 0.075 x 138.2 = 10.365 g

% (\(K_2CO_3\)) = \(\frac{8.45 X 100}{10.365}\) = 81.5%

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Sodium chloride is produced and used in the production of polyester, paper, rubber, glass, chlorine, household bleach, soaps, detergents, and dyes.

Chemically speaking, salt is a combination of chloride and sodium. Actually, the element that is most harmful to your health is sodium. (Therefore, the chloride is what gives food its "salty" flavor.).

To replace salt and water that have been lost from your body as a result of specific conditions, sodium chloride 23.4% injection is employed (eg, hyponatremia or low salt syndrome). Additionally, it is added to IV fluids that contain carbohydrates and parenteral nutrition total (TPN).

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Answer:

All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays.

Explanation:

The volume of 0.255 M KOH solution required to neutralize a sample of sulfuric acid can be determined by stoichiometry and the balanced equation of the neutralization reaction.

In the balanced equation for the neutralization reaction between sulfuric acid (H2SO4) and potassium hydroxide (KOH), it is stated that 2 moles of KOH react with 1 mole of H2SO4 to produce 2 moles of water (H2O) and 1 mole of potassium sulfate (K2SO4). This means that the stoichiometric ratio between H2SO4 and KOH is 1:2.

To determine the volume of 0.255 M KOH solution required, you need the molarity and volume of the sulfuric acid solution. Let's assume you have the volume of sulfuric acid in liters (L).

According to the stoichiometry, 1 mole of H2SO4 reacts with 2 moles of KOH. Using the molarity and volume of KOH, you can calculate the number of moles of KOH required. Then, based on the stoichiometric ratio, you can determine the moles of H2SO4 present in the sample.

Finally, using the molarity of the sulfuric acid solution, you can calculate the volume of the solution required to neutralize the given sample. Remember to convert the volume from liters to the desired unit (e.g., milliliters) if needed.

Please provide the volume of the sulfuric acid solution in order to proceed with the calculation.

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Answer: B

Explanation: Genetics has to do with genes, which is appearance, which is hereditary from the parent :)

Answer: A. is prey B. is predator C. is habitat D. is comunity E. is plants are producers and plant eating animals  consumors  F. is food chain G. is food web H. parasite I decomposers and scavengers J. is compete K an adsption

Explanation:

At a pH of 7, the charged groups present in glycine are -NH3+ and -COO−.

So, the correct answer is D) A and B.

At this pH, the amino group (-NH3+) is positively charged, and the carboxyl group (-COO−) is negatively charged, resulting in a zwitterionic form of glycine. The amino group (-NH2) on glycine can act as a base and pick up a hydrogen ion (H+) to become positively charged (-NH3+), while the carboxyl group (-COOH) can act as an acid and donate a hydrogen ion to become negatively charged (-COO-).

Therefore, at pH 7, the amino group is protonated to become -NH3+ and the carboxyl group is deprotonated to become -COO-. The net charge of glycine at pH 7 is neutral, as the positive and negative charges cancel each other out.

The chemical structure of glycine at pH 7 can be represented as H3N+CH2COO-.

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Answer:

Rate = k [HO2]

Rate constant = 0.8456us-1

Explanation:

The rate law is given as;

Rate = k [HO2]^x

Where x signify the order of reaction.

For an order of reaction, the rate constant is constant for all concentrations. We are going to use this to obtain the order of reaction.

Zero Order:

[A] = [A]o -kt

5.1 = 8.5 - k(0.6)

-k (0.6) = 5.1 - 8.5

k = 5.67

3.6 = 5.1 - k(0.4)

-k (0.4) = 3.6 - 5.1

k = 3.75

The fact that the rate constant was not constant means the reaction is not a zero order reaction.

First Order:

ln[A] = ln[A]o -kt

(5.1) = ln(8.5) - k(0.6)

-k (0.6) = ln(5.1) - ln(8.5)

k = 0.8524

ln(3.6) = ln(5.1) - k(0.4)

-k (0.4) = ln(3.6) - ln(5.1)

k = 0.8708

ln(2.6) = ln(3.6) - k (0.4-k (0.4) = ln(2.6) - ln(3.6)

k = 0.8136

From the three calculations we see that the value of the rate constant is fairly constant in the range of 0.8 This means our reaction is a first order reaction.

The rate law is given as;

Rate = k [HO2]

We can represent the rate constant as the average of the three rate constants calculated above;Rate constant = (0.8136 + 0.8708 + 0.8524 / 3)

Rate constant = 0.8456us-1

Answer:

The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance.

Explanation:

It represents the time it takes for half of the material to decay to a daughter element.

The half-life of a radioisotope represent the time it takes for half of the material to decay to a daughter element (Option B)

This is the time taken for half a material to decay. The longer the half-life of an element, the more stable the element.

If the initial mass of an element is 100 g and after a particular time (say 72 minutes) the mass of the element is now 50 g.

Therefore, the time 72 minutes is called the half-life of the element because that is the time taken for half the element to decay.

With the above information in mind, we can conclude that the correct answer to the question is:

Option B. It represents the time it takes for half of the material to decay to a daughter element.

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Answer:

yaeh

Explanation:

a)Ca(OH)

2

​

+CO

2

​

⟶CaCO

3

​

+H

2

​

O

No. of atoms:Ca−1;O−4;H−2;C−1

b)Zn+AgNO

3

​

⟶ZnNO

3

​

+Ag

No. of atoms:Zn−1;Ag−1;N−1;O−3.

The time taken by an immersion heater to heat the water from 27.5°C to 85.5°C is 6.4 minutes.

To calculate the time taken by an immersion heater, use the formula:

P = Q / t

where P is the power of the immersion heater, Q is the heat energy, and t is the time taken to heat the water.

The values given are:

Substituting these values into the formula:

Q = mcΔT

Q = 0.361 kg × 4.184 J/g°C × 58°C

= 87.7 kJ = 87,700 J

Substituting the values of P and Q into the formula:

P = Q / t

we get:

t = Q / P = 87,700 J / 228 W = 384.2 s = 6.4 minutes

Therefore, it took about 6.4 minutes for the immersion heater to heat the water from 27.5°C to 85.5°C.

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We should only carry out terrace farming on the sloppy land.​ This is the type of farming done on slope land

Terrace farming is a method of farming where steps (terraces) are built into the slopes of a hill or mountain to create flat surfaces for cultivation. This technique is commonly used in areas with steep slopes or hills where traditional flat farming is not feasible.

The terraces help to prevent soil erosion, improve water retention, and make it easier to cultivate crops. Terrace farming has been used for centuries by various civilizations around the world, including the Incas in South America and the rice farmers of Southeast Asia.

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Algae blooms are most often caused by eutrophication.

Algae blooms are are dense layers of tiny green plants that occur on the surface of lakes and other bodies of water when there is an overabundance of nutrients (primarily phosphorus) on which algae depend.

Algae species tend to proliferate in growth (bloom) in the presence of abundance nutrients. This abundance of nutrients is as a result of a process called eutrophication.

Eutrophication is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.

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Answer:

Below•

Explanation:

Fossil Fuel: It's a natural gas based on natural materials such as coal.

Biomass: It's the total weight of substance.

\( \qquad \qquad...\)

Answer:

option first is the right answer

Answer:

Ions are formed when atoms lose or gain electrons, with the metal transferring electrons to the outermost shell of the non-metallic atom

Answer: C, 0

Explanation: just a mere guess

Answer:

9

Explanation:

- When constructing the Lewis structure as mentioned in the question we must first construct the skeleton with Br as the center atom and F surrounding it.

- Next we count the number of electrons on each atom in this case

Br - 7

2F - 7×2

In total we have 21

but because of the + charge in the final molecule we remove one electron in order to get the + charge so we have 20 electrons now

- Now we know we've already used up 2 pairs to join the Br and F atoms together so we're left with 8 more pairs, we start by distributing the electron pairs first to the F atoms and then give the remaining to the Br atom

- Br should 7 electrons ideally so here we see it'll have only 6, therefore Br gets the + charge

- Next just count the no of pairs and viola you have your answer which is 9

(Attached is the final structure of BrF2+)

Answer:

C

Explanation:

Increasing temp causes increased molecule movment in sample 2

The arrangement of these elements according to the atomic radius will be as Ne > Li > Be > B > C > N > O > F.

The atomic radius measures the separation between the nucleus and the outermost edge of the electron cloud. In general, the radius of an element gets smaller as one moves along a period and gets larger as one moves down a group. Effective nuclear charge rises with time while electron shielding stays constant.

A reduced atomic radius is the result of the electron cloud being brought closer to the nucleus due to a higher effective nuclear charge's greater attraction to the electrons. The distance between the nucleus and the outermost orbital increases as the number of energy levels (n) decreases down a group. The atomic radius increases as a result.

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Answer:

Li Be B C N O F Ne largest--> smallest

Explanation:

the further to the right on the periodic table the smaller the atomic radius

thus the noble gasses generally the smallest ones and the alkali metals have the largest

Answer:

Weak; a lot of potential energy.

Explanation:

Carbon-carbon covalent bonds, such as the ones in carbohydrates and lipids, are weak and have potential energy.

In chemistry, a covalent bond is a chemical connection between two ions or atoms in which their respective electron pairs are shared. A molecular bond is another name for a covalent link.

Several other chemical species, including radicals and macromolecules, may also include this kind of connection. Irving Langmuir invented the term "covalence" around 1919 to characterize the quantity of electron pairs exchanged by nearby atoms, but the phrase "covalent bond" wasn't used until 1939. Carbon-carbon covalent bonds, such as the ones in carbohydrates and lipids, are weak and have potential energy.

Therefore, carbon-carbon covalent bonds, such as the ones in carbohydrates and lipids, are weak and have potential energy.

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Answer:

C. size and shape

Explanation:

Physical properties such as size, shape, color, density, magnetism or the

ability to sink or float can be used to separate the substances in a mixture..

Filtration is when matter is passed through a filter and the larger particles

are separated out. Magnets can be used to separate magnetic matter from

non-magnetic matter in a mixture. Objects that float when placed in water

can be separated from those that don’t by placing the mixture in water.