How many grams of sodium sulfate will be formed if you start with 175. 0 grams of sodium hydroxide and you have an excess of sulfuric acid?

After 0.75 s, the reactant's final concentration was 0.0672 mol/L.

Log [Initial concentration] = - rate constant time + log [Initial concentration] has been supplied as the rate reaction for the first-order reaction. [Last-ditch effort]

The reaction described has:

0.27 M for the first concentration

0.75 s/rate constant

Time = 0.75 s

One can provide the ultimate concentration by:

log [0.27] = - 0.75 *0.75 + log [Final concentration]

log [0.27]=-0.5625+log [Final concentration]

log [0.27] + 0.5625 = log [Final concentration]

log [Final Concentration]=1.31+0.5625

log [Final concentration] = 1.8725

Final concentration: 0.0672 mol/L

After 0.75s, the reactant's final concentration was 0.0672 mol/L.

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Answer:

Inert gases or noble gases

Explanation:

These gases have 8 outer shells meaning their full so they won't allow chemical reactions therefore providing an inert environment hence the name inert gas.

Answer:

it can be done using the method of lithium paper

Answer:

64.25

Explanation:

Average atomic mass = percentage × mass of all isotopes/ 100

Relative atomic mass = 80*64+15*65+5*66/100

=5120+975+330/100

=6425/100

64.25

Answer:

el ejercicio físico ayuda a gente a perder peso y reduce el riesgo de desarrollar algunas enfermedades. el ejercicio físico regular el reducen los riesgos de ciertas enfermedades como obesidad, diabetes tipo 2 e hipertensión el ejercicio físico puede ayudar a mantener el cuerpo en un peso saludable pero a veces algunos tienen enfermedades al corazón o asma y les afecta a ser demasiado práctica esa actividad

The group of elements found as diatomic molecules at standard conditions (room temperature and pressure) is known as the diatomic elements. These elements exist naturally as diatomic molecules, meaning they form stable molecules by bonding two atoms of the same element together.

The diatomic elements are:

1. Hydrogen (H₂)

2. Nitrogen (N₂)

3. Oxygen (O₂)

4. Fluorine (F₂)

5. Chlorine (Cl₂)

6. Bromine (Br₂)

7. Iodine (I₂)

These elements are all found in Group 17 (Group VIIA) of the periodic table, except for hydrogen which is in Group 1 (Group IA). Diatomic molecules are formed due to the sharing of electrons through covalent bonding between the atoms of the same element.

It's important to note that under certain conditions, some elements can exist as diatomic molecules temporarily, but not under standard conditions. For example, elements such as sulfur (S₈) and phosphorus (P₄) can form diatomic molecules under specific temperature and pressure conditions.

The diatomic nature of these elements has important implications for their reactivity and chemical properties.

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The mass of anhydrous copper(II) sulfate in 55 cm³ of a 0.20 mol/dm³ solution is approximately 1.76 grams.

To calculate the mass of anhydrous copper(II) sulfate in a given solution, we need to consider the molar concentration of the solution and the volume of the solution.

Given:

Molar concentration of the solution (c) = 0.20 mol/dm³

Volume of the solution (V) = 55 cm³

First, we need to convert the volume from cm³ to dm³:

1 dm³ = 1000 cm³

55 cm³ = 55/1000 dm³ = 0.055 dm³

Next, we can use the formula:

Mass = Molar concentration × Volume × Molar mass

The molar mass of anhydrous copper(II) sulfate (CuSO₄) is:

Atomic mass of Cu = 63.55 g/mol

Atomic mass of S = 32.07 g/mol

4 × Atomic mass of O = 4 × 16.00 g/mol = 64.00 g/mol

Total molar mass = 63.55 + 32.07 + 64.00 = 159.62 g/mol

Now we can calculate the mass:

Mass = 0.20 mol/dm³ × 0.055 dm³ × 159.62 g/mol

Mass ≈ 1.76 grams

Therefore, the mass of anhydrous copper(II) sulfate in 55 cm³ of a 0.20 mol/dm³ solution is approximately 1.76 grams.

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Answer:

Sometimes they are and sometimes they are not

Answer:

The specific heat of water is more specific than the heat of sand, therefore, it will take more energy to raise the same amount of water with the same temperature.

Explanation:

The temp is 89 F so, 31.67° C

The specific heat of  the water is 4.184 J/g° C

The specific heat of the sand is 0.290 J/ g° C

The heat is the amount  of energy that is needed to raise the temp. of the substance

You will need a lot more energy to raise the temp of the water then of the same amount of sand, therefore, because of the specific lower heat of the sand it will raise it's temperature quicker compared to water.

To find the molar mass of the given compound, we have use the molar masses of each element present in the molecule and multiply them by the number of atoms of each element in the molecule. Once we have these values, add them.

It means that we have to multiply the molar mass of Cr times 1, the molar mas of N times 2 and the molar mass of O times 6:

It means that the molar mass of Cr(NO3)2 is 176g/mol.

The ball would experience a net force of 0 N and would not move in either direction.

When the boy kicks the ball with a force of 40 N, he applies a force in one direction. At the same moment, a gust of wind blows in the opposite direction of the kick with a force of 40 N. These two forces act in opposite directions, and therefore cancel each other out.

According to Newton's first law of motion, an object at rest will remain at rest, and an object in motion will continue in motion in a straight line at a constant speed, unless acted upon by a net external force. In this case, the net force on the ball is 0 N, which means that the ball will not move in either direction.

This scenario highlights the importance of understanding net forces when analyzing the motion of objects. In the absence of a net force, the ball will not accelerate, and its velocity will remain constant.

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The hydronium ion concentration is \(3.85 \times10-13M\). The formula for the conjugate acid of Cl− is HCl, and the formula for the conjugate base of NH4+ is NH3.

The hydroxide ion concentration in an aqueous solution at 25 ∘C is 0.026M.

The pOH is 1.

Since \(pH + pOH = 14,\)

therefore,

\(pH = 14 - pOH\)

\(pH = 14 - 1\)

\(pH = 13.\)

Therefore, the pH of this solution is 13.

Now, we will calculate the hydronium ion concentration, using the relation;

\(Kw = [H+][OH-]\)

Where

\(Kw = 1.0 \times 10-14[H+][OH-]\)

\(Kw = 1.0 \times10-14[H+][0.026]\)

\(Kw = 1.0 \times10-14[H+]\)

\(Kw = \frac{ (1.0 \times 10-14)}{[0.026][H+]}\)

\(Kw = 3.85 \times 10-13M\)

Therefore, the hydronium ion concentration is \(3.85 \times10-13M.\)

The formula for the conjugate acid of Cl− is HCl, and the formula for the conjugate base of NH4+ is NH3.

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The GroEL/ES system, a type of chaperonin, functions in an ATP-dependent fashion. It is not limited to thermophilic proteins, low pH conditions, or in vitro environments. Moreover, chaperonins like GroEL/ES operate in an aqueous environment, not a non-aqueous one.

Chaperonins, such as the GroEL/ES system, play a crucial role in protein folding and assembly. They assist in the folding of newly synthesized or denatured proteins, ensuring proper conformation and preventing aggregation. The GroEL/ES system functions through an ATP-dependent mechanism. ATP binding and hydrolysis provide the energy necessary for conformational changes and the release of folded proteins. Unlike some other chaperones that may be specific to thermophilic proteins, the GroEL/ES system is not limited to such proteins. It can assist in the folding of a wide range of substrates. Similarly, chaperonins like GroEL/ES are not confined to low pH conditions. While changes in pH can influence protein stability and folding, chaperonins operate efficiently across a broad pH range. Furthermore, chaperonins function in vivo within the cellular environment, ensuring proper protein folding and preventing misfolding or aggregation. While they can also be studied in vitro, their primary role is to assist in protein folding in living cells. Additionally, chaperonins like GroEL/ES operate in an aqueous environment, as proteins require water for their proper folding and function. Non-aqueous environments are generally unsuitable for protein folding and can disrupt the folding process. In summary, the GroEL/ES system functions in an ATP-dependent manner, assisting in the folding of a diverse range of proteins within the aqueous environment of living cells. It is not limited to thermophilic proteins, low pH conditions, or in vitro studies.

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Answer:

the reactants and products have have exactly the same molecules

The reactants and products have exactly the same atoms, therefore the concept of conservation of mass applies to chemical reactions. Therefore,  option (b) is correct.

According to this law, matter can neither be created nor destroyed, but can be converted from one form to another. So the same number and type of atoms in a chemical reaction before and after the chemical change are present.

The initial substances or reactants change into different substances or products in any chemical change. Both the reactants and products are made up of atoms as all matter is made up of atoms.

The matter is conserved as the equal number of atoms of each element in the reactants and products, and the total mass of the reactants must equal the total mass of the products.

The law of conservation of mass can be only followed in a chemical reaction if the reactants and products have exactly the same atoms.

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2.62J of energy will be required to warm a silver metal from a temperature of 25°C to 27.5°C.

The energy required in a calorimetry can be calculated using the following formula:

Q = m × c × ∆T

Where;

According to this question, 4.37 g of silver should be heated from 25°C to 27.5°C. The heat required is as follows:

Q = 4.37 × 0.24 × (27.5 - 25)

Q = 1.0488 × 2.5

Q = 2.62J

Therefore, 2.62J of energy will be required to warm a silver metal from a temperature of 25°C to 27.5°C.

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In response to a rapid increase of organic acid in the body, you would expect to observe acidosis.

An increase in organic acid levels in the body can lead to a condition called acidosis. Acidosis occurs when there is an excess accumulation of acid or a decrease in the body's ability to remove acid effectively. This disrupts the normal pH balance in the body, shifting it towards the acidic side. The main indicators of acidosis include a decrease in blood pH and an increase in hydrogen ion concentration.

The body maintains a delicate acid-base balance, and any disruption to this balance can have adverse effects on various physiological processes. Acidosis can have several causes, such as metabolic disorders, kidney dysfunction, or respiratory conditions. The symptoms of acidosis can vary depending on the severity and underlying cause but may include fatigue, confusion, shortness of breath, increased heart rate, and potentially more severe complications if left untreated. Prompt medical attention is necessary to identify the cause of acidosis and restore the acid-base balance in the body to prevent further complications.

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The value of ΔG at 1000 K is approximately 123643.2 kJ·mol\(^(-1)\).

To calculate the value of ΔG at 1000 K, we can use the equation:

ΔG2 = ΔG1 + ΔH(T2 - T1)

Where:

ΔG2 is the change in Gibbs free energy at the desired temperature (1000 K)

ΔG1 is the change in Gibbs free energy at the initial temperature (298 K)

ΔH is the change in enthalpy (heat) of the reaction

T2 and T1 are the desired and initial temperatures, respectively.

Given:

ΔH0 = 176 kJ·mol\(^(-1)\)

ΔG0 = 91.2 kJ·mol\(^(-1)\)

T1 = 298 K

T2 = 1000 K

Substituting the values into the equation:

ΔG2 = ΔG1 + ΔH(T2 - T1)

ΔG2 = 91.2 kJ·mol\(^(-1)\) + 176 kJ·mol\(^(-1)\)(1000 K - 298 K)

Now, let's calculate ΔG2:

ΔG2 = 91.2 kJ·mol\(^(-1)\)+ 176 kJ·mol\(^(-1)\)(702 K)

ΔG2 = 91.2 kJ·mol\(^(-1)\) + 123552 kJ·mol\(^(-1)\)

ΔG2 = 123643.2 kJ·mol\(^(-1)\)

Therefore, the value of ΔG at 1000 K is approximately 123643.2 kJ·mol\(^(-1)\).

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Answer:

MAIN IDEA
What the authors meant is not to judge people by their looks.

_____________________________________________________________

THE UGLY DUCKLING

The ugly duckling doesn't fit with the other ducklings and grows up, to be a fabulous bird. In the beginning, he is teased because of his looks, in a quote, "As the ugly duckling grew, many animals in the pond criticized him. His feathers were too dark, his neck was too long, and his body was too big. His fellow ducklings refused to recognize that underneath the feathers, the ugly duckling was kind, good, and gentle. The ugly duckling shed many tears because none of the other animals would play with him."

Near the end, however, it states, "He believed that the swans would never be his friends and looked down into the pond in despair. Then, his eyes opened wide, for he saw his reflection. To his great astonishment, the ugly duckling discovered that he was a beautiful, royal swan! The swans welcomed their new friend, whose lovely appearance was matched only by his kind heart. He now felt like he belonged." Throughout the course of the story, the other birds' views change since now they realize how awful they felt for mistreating the ugly duckling.

_____________________________________________________________

THE PRINCESS AND THE PEA

The king and queen didn't believe that she was a princess, so they had her endure the trial of sleeping on twenty mattresses with a pea under the very bottom one. Near the beginning of the story, it states, "The disheveled maiden looked at the king in disbelief. "I am a princess, come to see the prince," she explained, all the while shivering. The king summoned his wife, the queen, for advice. The queen looked at the hideous creature in disbelief, thinking that no princess would ever allow herself to be found in such a state. She thought quickly and came up with a clever plan. The queen put a small pea at the bottom of a bed and piled twenty mattresses on top of it. When the girl arrived at the room, she had to climb a ladder to reach the top of the bed, where she collapsed in exhaustion." This is when the king and queen were in doubt that she was a princess.

However later on it stated, "Bright and early the next morning, the king and queen arrived at the girl's bed-chamber. The queen asked the girl how she had slept the night before. "Absolutely terribly!" bemoaned the maiden. "I have spent the entire night tossing and turning. I don't know whether there is something hard in the bed, or your mattresses are rocks, but my body is black and blue." The queen and the king stared at the maiden in astonishment. Only a real princess would have such delicate skin that she could feel a pea under twenty mattresses. The queen and king brought her to the prince, who was thrilled to meet a real princess with such an independent spirit." As you can see the king and queen believed that she was a princess now because they stated, "Only a real princess would have such delicate skin that she could feel a pea under twenty mattresses."

_____________________________________________________________

CONCLUSION
Both stories focus on how the main character is doubted or mistreated because of how they look, but throughout the stories, the main character proves them wrong.

Explanation:

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Answer:

A dam like structure used to capture energy from masses of water moving in or out of a bay of rivers due to tidal force is called tidal barrage.

Explanation:

It may help you to solve question.

Given :

An atom of a certain element has 12 protons, 14 neutrons, and 2 valence electrons.

To Find :

The name of this element.

Solution :

We know, element with atomic number ( number of protons ) 12 and valance electrons is Magnesium.

Now, isotope of magnesium of proton with 14 neutrons is Mg-16 .

Therefore, name of element is Mg-16 .

Hence, this is the required solution.

1. B, the energy associated with the motion of an object

2. C, 12.4 g/mL

3. C, 5

1) B) Kinetic energy is energy associated with the motion of an object.

2) B) Density equals mass divided by volume: 1.38 g/mL

3) C) There are 5 significant figures in 20.300

4) A) 80 is the atomic number for mercury on the periodic table.

5) E) The formula for copper (II) sulfate pentahydrate is CuSO4•5H2O

So in summary:

• Kinetic energy is the energy of a moving object due to its motion.

• Density is calculated by dividing an object's mass by its volume.

• Significant figures refer to the known precision of a measurement based on the digits reported.

• Atomic symbols represent elements on the periodic table.

• Chemical formulas use symbols of the elements to show the proportions of atoms in a compound.

Answer:

So what you want to do is to place sulfur on top with the two fluorine's  on the bottom left and right hand side at slight angles. You don't want to make it look interconnected as one whole bond. Draw a single line from each "F" to the "S" to model two fluorine atoms bond to one sulfur atom (Single bond, only one electron is being shared between each).

Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

answer

yes

Explanation:

Taking into account the reaction stoichiometry, 17.61 moles of O₂ is required to react with 155 grams of C₃H₈.

In first place, the balanced reaction is:

C₃H₈ + 5 O₂  → 3 CO₂ + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 44 grams of C₃H₈ react with 5 moles of O₂, 155 grams of C₃H₈ react with how many moles of O₂?

\(moles of O_{2} =\frac{155 grams of C_{3} H_{8}x5 moles of O_{2} }{44 grams of C_{3} H_{8}}\)

moles of O₂= 17.61 moles

Finally, 17.61 moles of O₂ is required to react with 155 grams of C₃H₈.

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The expected heterozygosity for the population with four alleles at the given locus, based on the provided allele frequencies, is approximately 0.74.

To calculate the expected heterozygosity (He) for a population with four alleles at a given locus, we can use the formula:

He = 1 - Σ(pi2), where pi represents the frequency of each allele in the population.

Zygosity is the degree to which both copies of a chromosome or gene have the same genetic sequence. In other words, it is the degree of similarity of the alleles in an organism. Given the allele frequencies:

P1 = 0.3

P2 = 0.2

D3 = 0.2

P4 = 0.3

We can substitute these values into the formula:

He = 1 - [(0.3^2) + (0.2^2) + (0.2^2) + (0.3^2)]

He = 1 - [0.09 + 0.04 + 0.04 + 0.09]

He = 1 - 0.26

He ≈ 0.74

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No, it does not pass the "fat pencil" test. Therefore, a normal distribution is not a reasonable model. Option B is the correct answer.

The "fat pencil" test is a quick visual check to determine if a dataset can be reasonably approximated by a normal distribution. In this case, the pH readings of wastewater show a significant deviation from a normal distribution. The presence of several low pH values (1.0) and a few high pH values (10.0, 10.5, 11.4) indicate a non-normal distribution with skewness and potential outliers. Therefore, it is not reasonable to model these data using a normal distribution.

Option B is the correct answer.

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Answer: Wrote the answers below

Explanation:

The balanced equation for Number 1 is:

Fe2O3(s) + 3H2(g) --> Fe(s) + 3H2O(l)

Step 1:

moles ratio of iron (III) oxide and hydrogen is 1:3

step 2:

work out mr (molar mass) of fe2o3: 111.68+ 48 = 159.68

moles of  iron (III) oxide: 33.5g  divided by 159.68 = 0.21 mol

Step 3:

1:3 ratio so 0.21 times 3 = 0.63 mol of hydrogen

Step 4:

mass of hydrogen = mol times mr

0.63 times 2 = 1.26g

mass of hydrogen = 1.26g or 1.27g depending on whether you used 1.00 or 1.01 for the mr of hydrogen