the resultant pressure force acting on a body completely or partially submerged in a liquid is the ______________________________.

Answer:

.91 ng

Explanation:

So for the first one the conversion factor which is the first blank in your first question is (1/100) and the second blank which would be (74)(1/100) is 0.0174

The second one would have two conversion factors where the first blank would convert to grams, so the conversion factor for the first blank is (1000/1), then converting from grams to nano grams, whose conversion factor is (1,000,000,000/1).

So in general the second one is 9.1 x 10^-13 (1000/1) x (1,000,000,000/1) = .91 ng

Hope my explanation is easy to understand.- Ryan Brown indy

9.1 x 10-¹³ kg is equal to 0.91 nanograms (ng).

CONVERT MASS IN kg TO g

1000 grams = 1 kilogram

= 9.1 x 10^(-13+3)

= 9.1 × 10-¹⁰ grams.

CONVERT MASS IN g TO ng

1gram = 1000000000 (10⁹) nanograms

= 9.1 × 10^(-10 + 9)

= 9.1 × 10-¹

= 0.91 nanograms (ng).

Therefore, 9.1 x 10-¹³ kg is equal to 0.91 nanograms (ng).

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The question requires us to explain the differences in radii of neutral atoms, cations and anions.

To answer this question, we need to keep in mind that a neutral atom presents the same number of protons (positive particles) and electrons (negative particles). Another important information is that the protons are located in the nucleus of the atom, while the electrons are around the nucleus. Also, there is an electrostatic force between protons and electrons, which means that they the protons tend to attract the electrons to the nucleus.

While a neutral atom presents the same number of protons and electrons, a cation is an ion with positive charge, which means it has lost one or more electrons. In a cation, the balance between protons and electrons doesn't exist anymore: now, there is more positive than negative charge (more protons than electrons), and the overall attractive force that the protons have for the electrons is increased. As a result, the electrons stay closer to the nucleus and the radius of a cation is smaller than the neutral atom from which it was derived.

On the other side, anions present negative charge, which means they have received electrons. Similarly to cations, the balance between protons and electrons doesn't exist anymore, but in this case, there are more electrons than protons. In an anion, the overall attractive force that the protons have for the electrons is decreased. As a result, the electrons are "more free" to move and, as they are not so attracted to the nucleus, they tend to stay farther from the positive nucleus compared to the neutral atom - because of this, the radius of an anion is larger than the neutral atom from which it was derived.

Answer:

Cl⁻ Or A

Explanation:

The amount of heat absorbed in turning 3.00 grams of ethanol from a liquid to a vapor is approximately 7.86 kJ. This can be calculated using the molar heat of vaporization of ethanol, which is 38.6 kJ/mol.

To calculate the heat absorbed, we first need to convert grams of ethanol to moles. The molar mass of ethanol (C2H5OH) is approximately 46.07 g/mol, so 3.00 grams is approximately 0.065 moles.

Next, we use the molar heat of vaporization (ΔHvap) of ethanol, which is 38.6 kJ/mol. Multiplying ΔHvap by the number of moles gives us the heat absorbed:

Heat absorbed = ΔHvap * moles

= 38.6 kJ/mol * 0.065 moles

≈ 2.51 kJ

Therefore, approximately 7.86 kJ of heat is absorbed when 3.00 grams of ethanol is converted from a liquid to a vapor.

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The coefficients in front of Bro3-(aq) and Br-(aq) when the equation( BrO3 -(aq) + 5 Br-(aq) + 6H+(aq)→ 3Br2(aq) + 3H2O (l)) is balanced in an acidic solution is : 1, and  5 respectively.

A balanced equation is an equation for a chemical reaction in which number of atoms for each element in the reaction and the total charge are  same for both reactants and the products. Both the mass and charge are balanced on both sides of the reaction in a balanced equation.

A balanced equation is a chemical equation in which mass is conserved and there are equal number of atoms of each element on the both sides of the equation.

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The predominant chemical species affecting the pH is H₃O⁺, but the pH value of the resulting solution is actually 1.26.

To calculate the pH value of the resulting solution we need the number of moles of H⁺ ions (n) and the volume of the solution (V). The volume is easy - it is the sum of the volumes of the barium hydroxide solution (13.90 mL = 0.01390 L) and the hydrochloric acid solution (45.00 mL = 0.04500 L)

V(total) = V(Ba(OH)₂) + V(HCl)

V(total) = 0.01390 L + 0.04500 L = 0.05890 L

Now we need to calculate the number of moles of H⁺ (H₃O⁺) ions. The number of moles of H⁺ ions in the HCl solution is:

n(H⁺) = c(HCl) * V(HCl)

n(H⁺) = 0.300 M * 0.04500 L = 0.0135 mol

On the other hand, the number of moles of OH⁻ ions is double the number of moles of barium hydroxide, because 1 mol of barium hydroxide releases 2 moles of OH⁻ ions:

n(OH⁻) = 2 * c(Ba(OH)₂) * V(Ba(OH)₂)

n(OH⁻) = 2 * 0.370 M * 0.01390 L = 0.010286 mol

The number of moles of H⁺ ions is greater than the number of moles of OH⁻ ions, so after the neutralization, we will have an excess of H⁺ ions:

n(H₃O⁺) = n(H⁺) - n(OH⁻)

n(H₃O⁺) = 0.0135 mol - 0.010286 mol = 0.003214 mol

We can now finally calculate the concentration of H₃O⁺ ions in the final solution:

c(H₃O⁺) = n(H₃O⁺) / V(total)

c(H₃O⁺) = 0.003214 mol / 0.05890 L = 0.05457 M

From this, we can find the pH value of the solution:

pH = -log(c(H₃O⁺))

pH = -log(0.05457)

pH = 1.26

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Answer:

An equation is written in a correct way if the equation is balanced. If you want to find out if the equation is balanced, you have to count how many molecules of each element is present and then just balance the equation on the left side and the right side.

Answer:

The empirical and molecular formula because the ratio is 2:1 and there is 2 hydrogen atoms and 1 oxygen atom.

Hope this helps!

The compounds ranked based on their relative Bronsted acidities from strongest to weakest are as follows:

1. H-I (Hydrogen iodide)

2. H-CH3 (Methyl radical)

3. H-OH (Hydroxide ion)

4. H-NH2 (Ammonia)

5. H-F (Hydrogen fluoride)

Bronsted acidities can be determined by analyzing the stability of the corresponding conjugate bases. A stronger acid will have a more stable conjugate base. Here is the explanation for the ranking:

1. H-I: Hydrogen iodide (HI) is a strong acid because iodide ion (I-) is a stable conjugate base. Iodide ion is large and can effectively disperse negative charge, leading to stability.

2. H-CH3: Methyl radical (CH3) is weaker than HI but stronger than the remaining compounds. It is a stable radical and has resonance structures that stabilize its conjugate base.

3. H-OH: Hydroxide ion (OH-) is less acidic than HI and CH3. It forms a stable conjugate base, but it is not as stable as iodide ion or the methyl radical.

4. H-NH2: Ammonia (NH3) is weaker than the previous compounds. The lone pair on the nitrogen atom can be donated to accept a proton, making NH2- a relatively unstable conjugate base.

5. H-F: Hydrogen fluoride (HF) is the weakest acid among the given compounds. The fluoride ion (F-) is a relatively strong base, and its conjugate acid, HF, is a weaker acid compared to the others.

The ranking of the given compounds based on their relative Bronsted acidities, from strongest to weakest, is H-I, H-CH3, H-OH, H-NH2, and H-F. This ranking is determined by analyzing the stability of their respective conjugate bases, with stronger acids having more stable conjugate bases.

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Answer

b

Explanation:

because I took the test

Each hydrogen shares two electrons with nitrogen.

NH3 is a molecular compound. In molecular compounds, electrons are shared between the bonding atoms in a covalent bond. The number of electrons shared between atoms depends on the respective valencies of the combining atoms.

Nitrogen has a valency of three and hydrogen has a valency of one. Therefore, in NH3, each hydrogen shares two electrons with nitrogen.

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The influence of a cerium additive on ultrafine diesel particle emissions and kinetics of oxidation can be significant. Cerium additives, such as cerium oxide (CeO2), are often used in diesel fuel as combustion catalysts to improve fuel efficiency and reduce emissions.

When cerium additives are introduced into diesel fuel, they can enhance the oxidation process of diesel particles. The cerium particles act as catalysts, promoting the conversion of hydrocarbons and carbon monoxide into less harmful gases like carbon dioxide. This helps to reduce the emissions of ultrafine particles, which are known to have adverse health effects.

The addition of cerium can also influence the kinetics of oxidation. It can lower the activation energy required for the oxidation reaction to occur, thereby increasing the rate of oxidation. This means that the diesel particles can be oxidized more quickly, leading to a reduction in particle emissions.

Furthermore, cerium additives have been found to have regenerative properties. They can form a protective layer on the surface of diesel particles, preventing the aggregation and growth of particles. This can help to maintain the small size of ultrafine particles, which are less harmful to human health compared to larger particles.

In conclusion, the addition of a cerium additive to diesel fuel can have a positive impact on ultrafine diesel particle emissions and the kinetics of oxidation. It can enhance the oxidation process, reduce particle emissions, and prevent particle growth. However, it is important to note that the specific effects may vary depending on the concentration of the additive, engine conditions, and other factors.

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Answer:

Balanced Chemical Equation:

H3PO4 + 5HCl → PCl5 + 4H2O

Answer:

this is your answer (8358) answer

I think

The appropriate explanation for the non-metal is that the higher effective nuclear charge less will be the atomic radius.

Atomic radius typically decreases during a period from left to right. There are a few little outliers, such how the oxygen radius is a tiny bit bigger than the nitrogen radius. Protons are gradually added to the nucleus at the same time that electrons are gradually added to the main energy level. The enhanced positive charge of the nucleus gradually attracts these electrons closer to it. The size of the atoms shrinks as the strength of attraction between nuclei and electrons grows. Due to electron-electron repulsions that would otherwise result in the atom's size expanding, the effect becomes less pronounced as one proceeds further to the right in a period.

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This is incorrect because HNO3 (nitric acid) is a stronger acid than H2SO3 (sulfurous acid). The other options are accurate comparisons of acid strengths.

The incorrect indication of relative acid strengths is d) h2so3 > hno3. This is because hno3 is a stronger acid than h2so3. The correct order of acid strengths is hcl > hf, h2so4 > h2so3, hclo2 > hclo, and hno3 > h2so3. It's important to note that the strength of an acid is determined by its ability to donate a proton (H+) to a base. A stronger acid is able to donate its proton more easily than a weaker acid.

Based on the given options, the incorrect indication of relative acid strengths is: d) H2SO3 > HNO3

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Given :

The heat of  vaporization for water is 2330 J/g.

To Find :

How many grams of water can be vaporized with 6500 J of energy.

Solution :

It is given that heat of  vaporization for water is 2330 J/g.

Means 2300 J of heat is required to vaporize 1 g of water .

Let , n grams of water is produced by 6500 J of energy .

\(n=\dfrac{6500\ J}{2330\ J/g}\\\\n=2.79\ g\)

Therefore, 2.79 g of water will vaporize by 6500 J of energy .

Hence, this is the required solution .

Each blank is filled with the correct word from the given options as follows: 1: Surround the area with B: absorbent material, then cover the spill; 2: Scoop up the material and place in a A: plastic bag; 3: Place the bagged waste in a D: solid waste container; and 4: Wipe down the area with C: detergent and water.

A spill in the workplace can yield a variety of hazards and risks to workers so, in essence, it is essential that they understand how to clean up liquid spills that otherwise can be hazardous. So, such materials are needed to be appropriate disposed of. Following steps can  be followed to clean up liquid spills properly:

1: Surrounding the area with absorbent material, then covering the spill;

2: Scooping up the material and placing in a plastic bag;

3: Putting the bagged waste in a solid waste container;

4: Wiping down the area with detergent and water

"

Complete question is as follows:

Fill in the words to complete each step in liquid spill cleanup.

options:

A: plastic bag...

B: absorbent material...

C: detergent and water...

D: solid waste container...

1. Surround the area with _________, then cover the spill.

2. Scoop up the material and place in a ________

3. Place the bagged waste in a _________

4. Wipe down the area with _________

"

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The final temperature of the mixture is 218.1°C.

The Specific Heat of gold 0.0123 J.

Specific heat is known to be the amount of energy required to raise the temperature of a unit mass of a substance by 1 degree. It is a physical property of matter, usually expressed in units of Joules/Kilograms/Kelvin (J/kgK).

Mass of gold = 325 g

Heat absorbed by water = mass of gold x specific heat x temperature change

325 x 0.128 x 405

Heat absorbed by water = 154,400 J

Heat capacity of water = mass of water x specific heat

200 x 4.184

Heat capacity of water = 836.8 J/degree Celsius

Final temperature = (heat absorbed by water ÷ heat capacity of water) + Initial temperature

Final temperature = (154400 ÷ 836.8) + 22

Final temperature = 218.1°C

Q = mcΔT

836.8 J/°C = 325 × c × (427°C - 218.1°C)

836.8 J/°C = 325 × c × 208.9

c = 836.8/(325 × 208.9)

c = 836.8/67,892.5

c = 0.0123 J

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Answer:

The pH of the 3.03 x 10-5 m solution of hypochlorous acid is approximately 6.265.

Explanation:

The pH of a 3.03 x 10-5 m solution of hypochlorous acid (Ka 2.9 x 10-8) can be found using the equation for the dissociation of a weak acid:

Ka = [H+][OCl-]/[HOCl]

Since we are given the Ka value and the concentration of HOCl, we can solve for [H+] using the quadratic equation:

Ka = [H+]2/[HOCl]
[H+]2 = Ka x [HOCl]
[H+] = sqrt(Ka x [HOCl])
[H+] = sqrt(2.9 x 10-8 x 3.03 x 10-5)
[H+] = 5.43 x 10-7 M

Therefore, the pH of the solution can be found using the equation:

pH = -log[H+]
pH = -log(5.43 x 10-7)
pH = 6.265

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Prediction 1 best shows what the population could look like after many generations. Because, the long beak traits is having more life time.

Each characteristics in a living thing is created by a respective genetic coding in its body. The genetic code which is responsible for a particular behavior or appearance is called a genetic trait.

Here, the prediction 1 is best . It already saying that long-beak hummingbirds are more likely to survive, that baby survived long enough to pass on its mutation, so the long-beak trait became more common over generations.

Prediction 2 says abut a  genetic trait which is less fit to survive. Hence, cannot affect the next generation population. Therefore, prediction 1 is best.

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Your question is incomplete. But your complete question probably was:

Prediction 1 :Two hummingbirds with short or medium beaks had a baby with a mutation in its genes for the long-beak trait.

Prediction 2 is best. A hummingbird could have been born with a mutation in its genes for the long-beak trait and lived for a little while.

Answer:

\($AlH^-_4, SiH_4 \text{ and}\ PH^+_4$\)

Explanation:

The elements belonging to third period which corresponds to B,C and N are Al, Si and P. All these elements in the third period tries to combine with four of hydrogen atoms and form an analogous species.

The formulae of these species are given as \($AlH^-_4, SiH_4 \text{ and}\ PH^+_4$\)

All these species have a central atom which has four electron domain and the geometry of the electron domain is tetrahedral. The hybridization which corresponds to the geometry of tetrahedral electron domain is \($sp^3$\) .

So \($AlH^-_4, SiH_4 \text{ and}\ PH^+_4$\) have the same hybridization at the central atom such as \($BH^-_4, CH_4 \text{ and}\ NH^+_4$\) .

The formulas of the analogous species of the elements of period 3 are \(\rm AlH_4, SiH_4, and\; PH_4\). These elements have the same hybridization ate the central atom.

Analogous species are those that have similar functions.

In chemistry, the elements that are present in the same column have similar properties.

These elements with similar properties are called analogous species of the periodic table.

Thus, the formulas are \(\rm AlH_4, SiH_4, and\; PH_4\), and they have the same hybridization at the central atom.

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Answer:

3.77 moles of Fe contain 2.27 × 10, 24 as an exponent

Answer- im pretty sure it's 2

Answer: The answer is B 1,3

Answer:

Some important achievements of chemistry includes discovery of oxygen ;Atomic Theory; Atoms Combine Into Molecules ;Synthesis of Urea; Chemical Structure ; Periodic Table of the Elements; Electricity Transforms Chemicals ; The Electron etc.

Chemistry is a field of science which deals with the chemicals present in laboratory or in our environment o related to human body also.

There are main 3 branches of chemistry that is organic and inorganic and physical chemistry some others are too like analytical chemistry ,industrial chemistry , pharmaceutical chemistry.

Organic chemistry deals with the carbon compounds and hydrogen compound inorganic chemistry deals with the elements of periodic table and pharmaceutical makes medicines for human health care. The reasons  for people to pursue discoveries in chemistry because it is the most important part of  daily life and related to the human health too.

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The complete question

Mention some important achievements of chemistry

The Synthesis of Adipic Acid experiment meets three of the twelve Principles of Green Chemistry: (1) Prevention, (2) Atom Economy, and (3) Safer Solvents and Auxiliaries.

1. Prevention: This principle involves designing processes to prevent waste, rather than treating or cleaning up waste after it has been produced. In the Synthesis of Adipic Acid experiment, the waste generated is minimized by optimizing the reaction conditions and using the required amounts of reactants, thereby reducing the need for waste treatment or disposal.
2. Atom Economy: This principle focuses on designing syntheses in which the maximum amount of the starting materials is incorporated into the final product. In Adipic Acid synthesis, the reactants are chosen in such a way that they efficiently convert into the desired product, resulting in a high atom economy and reducing the generation of waste materials.
3. Safer Solvents and Auxiliaries: The Synthesis of Adipic Acid experiment employs greener solvents or reduces the use of harmful solvents in the reaction. By selecting safer alternatives, the potential hazards and environmental impacts associated with the solvents are minimized, ensuring a more sustainable and eco-friendly synthesis process.

In conclusion, the Synthesis of Adipic Acid experiment successfully adheres to three of the twelve Green Chemistry principles by minimizing waste, optimizing atom economy, and using safer solvents, contributing to a more sustainable and environmentally responsible chemical synthesis.

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