How many valence electrons does Z have?

The statement that is true regarding drowning is as follows: Hypoxia in the drowning victim initially occurs due to water in the lungs (option A).

Drowning is the process whereby an individual organism dies from suffocation while immersed in water or other fluid.

Drowning occurs when a person spends too much time with their nose and mouth submerged in a liquid to the point of being unable to breathe.

If this is not followed by an exit to the surface, low oxygen levels and excess carbon dioxide in the blood trigger a neurological state of breathing emergency, which results in increased physical distress and occasional contractions of the vocal folds.

Hypoxia is the condition in which tissues (especially the blood) are deprived of an adequate supply of oxygen and this initially occurs when the victim occurs due to water in the lungs.

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The purpose of the brine wash is to reduce the amount of water in the organic solution.

Brine or high concentration of sodium chloride in water often finds application in industrial processes to remove impurities and other foreign and unwanted substances form the yields. It can easily remove the water due to its high affinity with water.

The same is achieved through high osmotic gradient formed by high concentration of solute particles in the brine, which causes flow of water thus drying up the organic solution.

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The maximum volume of carbon dioxide that can be formed at RTP would be 0.48 L.

Sodium carbonate reacts with hydrochloric acid according to the following balanced equation:

\(Na_2CO_3 + 2HCl -- > 2NaCl + H_2O + CO_2\)

The mole ratio of the sodium carbonate that reacts to the carbon dioxide that is produced is 1:1. Thus 0.020 mol of sodium carbonate will be equivalent to 0.020 mol of carbon dioxide.

At room temperature and pressure (RTP), 1 mole of gas is equivalent to 24 L of gas.

Thus, 0.020 mol carbon dioxide would be equivalent to:

0.020 x 24 = 0.48 L

In other words, the maximum volume of carbon dioxide that can be produced from the reaction at RTP is 0.48 L.

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The empirical formula of the molecule is CH2.

To determine the empirical formula, we need to find the simplest whole-number ratio of the atoms in the molecule. We can assume 100 grams of the molecule since percentages are given by mass.

To find the ratio, we need to divide the masses of each element by their respective atomic masses and then divide the result by the smallest value obtained:

The smallest value is 7.14 mol, so we divide both values by 7.14:

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Answer: The bus traveling 200km in 6 hours is traveling the fastest.

Explanation:

Bus 1

150km/5hrs

Simplify -> 30km/hr

Bus 2

200km/6hrs

Simplify -> About 33.333km/hr

Among the given options, the most likely to contain trans fatty acids would be partially hydrogenated vegetable oil.

Trans fatty acids are commonly found in processed foods that use partially hydrogenated oils as an ingredient. Partial hydrogenation is a process that converts liquid vegetable oils into solid or semi-solid fats, thereby increasing their shelf life and stability.

However, this process also generates trans fatty acids as a byproduct. Trans fats have been linked to various health issues, including heart disease. To make healthier choices, it is advisable to avoid products that list partially hydrogenated vegetable oil on their food labels.

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Answer:

C

B

Explanation:

throwing cotton balls causes the person to blink.

and Its not an allergic reaction so it's more of stomach pain that sneezing

Answer:

it should be c for the first one then b for the second one

Explanation:

hope it helps :)

Ques.1: Why do you think that you had to use a thin layer of onion skin, rather than a thick layer for the microscope?

Ans:- It is because, I the onion peel is thick layered, then it will be hard or impossible to see through the microscope.

Ques.2: When iodine reacts with starch, it produces a blue-black color. Starch is a white substance which plants use to store food. What structure did you see better because of the iodine? Why did you see this structure better?

Ans: Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.

This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.

Due to this, we can see the structure better.

Ques.3: From low power to high power, what structures became clearer in the stained onion tissue?

Ans: From lower to higher power, we can see:-

-- Large, rectangular interlocking cells,

-- Clearly visible distinct cell walls surrounding the cells,

-- Dark stained nucleus,

-- Large vacuoles at the center,

-- Small granules may be observed inside the cells (within the cytoplasm)

Ques.4: What is the shape of an onion cell?

Ans: The shape of an onion cell is rectangular or square in shape.

In the reaction of water, 2H2 is oxidized to form 2H2O by gaining oxygen atom which shows that 2H2 is reducing agent as it undergoes oxidation.

A reducing agent is a type of chemical that "donates" an electron to another atom that needs an electron. This type of reaction in which loss of electron occurs is called reduction reaction.

So we can conclude that 2H2 is oxidized to form 2H2O by gaining oxygen atom which shows that 2H2 is reducing agent as it undergoes oxidation.

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Answer:

search it

Explanation:

The acidity of vinegar works well to remove bathtub grime.  

Acidity refers to the higher concentration of H+ ions present in a substance. Acids are substances that donate protons (hydrogen ions) in aqueous solution, resulting in a lower pH value. pH is a measure of the acidity or basicity of a solution and ranges from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most basic.

Vinegar is a weak acid, typically containing acetic acid, which can help dissolve mineral deposits and soap that accumulate on the surface of a bathtub. To use vinegar to clean your bathtub, mix equal parts of white vinegar and water in a spray bottle, then spray the solution onto the dirt and let it sit for 15-20 minutes. After that, scrub the bathtub with a soft-bristled brush or sponge, then rinse the surface with water.

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No, a mixture of AgCl and PbCl2 cannot be separated using cold water. AgCl (silver chloride) and PbCl2 (lead chloride) are both insoluble in cold water, which means they do not dissolve in water at low temperatures. Therefore, when the mixture is added to cold water, both compounds will remain in their solid form and cannot be separated.

AgCl and PbCl2 have different solubility properties in water. AgCl is sparingly soluble in water, while PbCl2 is slightly more soluble. However, their solubilities are still relatively low, especially at cold temperatures. To separate AgCl and PbCl2, alternative methods such as selective precipitation, filtration, or the use of specific solvents or reagents are required.

These methods exploit the different solubilities or chemical properties of the compounds to separate them effectively. For example, adding a soluble salt like NaCl to the mixture can cause AgCl to precipitate out while PbCl2 remains in solution.

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Answer:

Decay. Plutonium-242 primarily decays into uranium-238 via alpha decay, before continuing along the uranium series.

Explanation:

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when molten CaF2 is electrolyzed by a current of 9.55 A for 19 h, approximately 136 g of calcium metal is produced.

To determine the mass of calcium produced when molten CaF2 is electrolyzed by a current of 9.55 A for 19 h, we'll use Faraday's Law of Electrolysis.

First, calculate the total charge passed through the electrolyte:
Charge (Q) = Current (I) × Time (t)
Q = 9.55 A × (19 h × 3600 s/h) = 653,940 C

Next, determine the number of moles of electrons (n):
n = Q / (Faraday constant F)
n = 653,940 C / (96,485 C/mol) ≈ 6.77 mol

The balanced equation for the electrolysis of CaF2 is:
2F- → F2 + 2e-
Ca2+ + 2e- → Ca

The mole ratio between calcium and electrons is 1:2. So, the number of moles of calcium produced is:
Moles of Ca = 0.5 × Moles of electrons
Moles of Ca = 0.5 × 6.77 mol ≈ 3.39 mol

Finally, calculate the mass of calcium:
Mass of Ca = Moles of Ca × Molar mass of Ca
Mass of Ca = 3.39 mol × 40.08 g/mol ≈ 136 g

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The mass of H₂SO₄, sulfuric acid produced on the interaction of Na sodium is 12.26 grams.

According to the balanced chemical equation,

2Na + H₂SO₄ → Na₂SO₄ + H₂

1 mole of Na reacts with 1 mole of H₂SO₄ to produce 1 mole of H₂. We are given that 5.6 L of H₂ is produced. At STP (standard temperature and pressure), 1 mole of any gas occupies 22.4 L. Therefore, the number of moles of H₂ produced can be calculated as,

n(H₂) = V(H₂) / V(molar)

n(H₂) = 5.6 L / 22.4 L/mol

n(H₂) = 0.25 mol

Since 2 moles of Na react with 1 mole of H₂SO₄, we can say that,

n(H₂SO₄) = n(H₂) / 2

n(H₂SO₄)= 0.25 mol / 2

n(H₂SO₄)= 0.125 mol

Now, we can use the molar mass of H₂SO₄ to calculate its mass,

M(H₂SO₄) = 98.08 g/mol

Plugging in the values, we get,

m(H₂SO₄) = 0.125 mol x 98.08 g/mol = 12.26 g

Therefore, the mass of H₂SO₄ required is 12.26 g.

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Complete question - Sodium (Na) interacts with H₂SO₄ and 5.6 liters of Hydrogen are obtained. What is the mass of H₂SO₄?

Chemical reaction - 2Na+ H₂SO₄ → Na₂SO₄ + H₂

Explanation:

1 mole Of atom = GAM

MG=24g

GAM of Mg=24g

Therefore 24g=mole

Not My answer But I saw That You needed it.

Credit zeeshanfazil

thank him for the answer!

Answer: H2SO4 + 2NaOH = Na2SO4 2H2O

Explanation: The ChemicalAid website is very helpful if you need to balance chemical equations.

Answer:

is it some kind of code??...........

The key differences between the Articles of Confederation and the U.S Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

The document created the better system of government for the new nation is the US constitution.

The Article of confederation , the state have stronger power than the central power and in the US constitution , the power of central government is stronger than the states. The important development was the establishment of three departments. There are three departments of government that is legislative , executive and judicial.

Thus, The key differences between the Articles of Confederation and the U.S. Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

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Answer:

I KNOW

Explanation:

Answer:

(C)The concentration of NOBr after 6 seconds is 0.0363

Explanation:

 The second order equation is given by

\(\frac{1}{R} = KT+\frac{1}{Ro}\)

k= rate constant= 0.8\(M^-1s^-1\)

T= time = 6s

Ro= initial concentration = 0.044

\(\frac{1}{R}\) = 0.8*6+ \(\frac{1}{0.044}\)

\(\frac{1}{R}\) = 27.53

R= 1/27.53 = 0.0363

The process of hydrogenation removes double bonds from fatty acids, giving the fat a more solid consistency.

Hydrogenation is a chemical reaction in which hydrogen atoms are added to unsaturated fatty acids to produce a saturated fat. This technique produces a more stable and less susceptible to oxidation fat than naturally occurring unsaturated fat. In addition, hydrogenation produces a harder fat, which makes it a popular ingredient in food manufacturing. A common example of hydrogenation is the conversion of liquid vegetable oil into solid margarine or shortening. As a result, hydrogenation removes double bonds from fatty acids, giving the fat a more solid consistency.

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When 500.0 mL of 0.10 M Ca²⁺ is mixed with 500.0 mL of 0.10 M SO₄²⁻, 6.807 grams of calcium sulfate will precipitate.

To determine the mass of calcium sulfate that will precipitate when 500.0 mL of 0.10 M Ca²⁺ is mixed with 500.0 mL of 0.10 M SO₄²⁻, we need to calculate the limiting reagent and use stoichiometry to find the mass.

First, let's calculate the moles of Ca²⁺ and SO₄²⁻ in the given solutions:

Moles of Ca²⁺ = (0.10 mol/L) × (0.500 L) = 0.05 mol

Moles of SO₄²⁻ = (0.10 mol/L) × (0.500 L) = 0.05 mol

Since the stoichiometric ratio between Ca²⁺ and SO₄²⁻ in the balanced equation for the formation of calcium sulfate is 1:1, we can see that both ions are present in equal amounts. Therefore, neither Ca²⁺ nor SO₄²⁻ is in excess, and the reaction will proceed to completion without any leftover ions.

The molar mass of calcium sulfate (CaSO₄) will be 136.14 g/mol.

To find the mass of calcium sulfate, we multiply the moles of CaSO₄ formed by its molar mass;

Mass of CaSO₄ = (0.05 mol) × (136.14 g/mol) = 6.807 g

Therefore, the mass of calcium sulfate will precipitate 6.807 grams.

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Answer:Atomic radius gets bigger

Explanation:

Atomic radius bigger because not only do the atoms have more and more protons and neutrons, and thus more mass in general, there is also stronger shielding affect. Shielding affect is when electrons closer to the nucleus block the positive charge from reaching electrons farther from the nucleus, and thus those far electrons are not drawn towards the nucleus as strongly, and spread out more, increasing atomic radius.

Explanation:

Being made of charged particles can also do some things that gases can't do, such as conduct electricity. For instance, if you have gas in a liquid state, all of its particles will behave the same way once it's cool to room temperature.

Answer:

The answer is C

Explanation:

An atom is extremely small, but a device to make them look bigger, like a microscope, will help Xavier see it

Answer:

c Draw Ernest Rutherford atomic model

Explanation: