Over the past week, Anna has been very curt with shondra, and when she ask if she has done something to offend her, Anna tersely replies, "no, everything is fine" what should shondra do

you would need 4 liters of the 70% alcohol solution and 2 liters of the 40% alcohol solution to obtain 6 liters of a 60% alcohol solution.

Let's assume x liters of the 70% alcohol solution and (6 - x) liters of the 40% alcohol solution are mixed. The amount of alcohol in the 70% solution is 0.70x liters, and the amount of alcohol in the 40% solution is 0.40(6 - x) liters. These amounts must add up to the amount of alcohol in the final mixture, which is 0.60 * 6 liters. Setting up the equation: 0.70x + 0.40(6 - x) = 0.60 * 6 ,Simplifying and solving for x: x = 4. Therefore, you would need 4 liters of the 70% alcohol solution and 2 liters of the 40% alcohol solution to obtain 6 liters of a 60% alcohol solution.

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Fertilization occurs in the fallopian tubes, while implantation occurs in the uterus.

Fertilization: Fertilization is the process by which a sperm cell from a male and an egg cell (ovum) from a female combine to form a zygote, which is the first stage of a new individual. Fertilization typically occurs in the fallopian tubes, also known as the uterine tubes or oviducts. When a woman ovulates, an egg is released from one of her ovaries and travels through the fallopian tube toward the uterus. If intercourse occurs during this time and sperm are present in the reproductive tract, they can swim through the cervix, enter the uterus, and reach the fallopian tubes. Fertilization most commonly occurs in the ampulla, which is the widest part of the fallopian tube. Once inside the fallopian tube, the sperm must navigate through the tubal environment and reach the egg. The sperm cells undergo a process called capacitation, which involves changes that enable them to penetrate the egg's outer layer. Eventually, one sperm cell successfully penetrates the egg, and their genetic material combines, forming a zygote.

Implantation:After fertilization, the zygote begins to divide and develop   a multicellular structure called a blastocyst. The blastocyst then travels through the fallopian tube and reaches the uterus, where it needs to implant for further development. Implantation refers to the process in which the blastocyst attaches itself to the lining of the uterus, known as the endometrium. The endometrium undergoes changes during the menstrual cycle to prepare for potential implantation. If the blastocyst successfully implants into the endometrium, it establishes a connection with the maternal blood vessels, allowing it to receive oxygen and nutrients from the mother's body.

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Answer:

B.) It will decrease from top to bottom

Explanation:

just got the answer right and looked on khan academy XD

The electronegativity of elements in the periodic table decreases from top to bottom. Details about periodic table can be found below.

Periodic table refers to a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group or column.

Electronegativity of elements is the tendency or a measure of the ability of an atom or molecule to attract electrons and thus form bonds.

In accordance to the arrangement of elements on the periodic table, the electronegativity of elements in the periodic table decreases from top to bottom.

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Answer:

 310.1 J/mol * K

Explanation:

since entropy increases with increasing molecular complexity The Value of s ( entropy ) for Butane, C4H10 will be

= 310.1 J/mol * K

Given that :

Methane ( CH4 ) = 186.3 J/mol*K

Ethane ( C2H6 ) = 229.6 J/mol*K

propane ( C3H8 ) = 270.3 J/mol*k

Answer:

chalk bubbles with vinegar

The answer is Mg3 glad I helped

The mass of PCl3 is 206 g

The limiting reactant is Cl2

We have the reaction equation as;

P4 + 6Cl2 ----> 4PCl3

Number of moles of P4 = 102.5 g/124 g/mol

= 0.83 moles

I mole of Cl2 occupies 22.4 L

x moles of Cl2 occupies 50.5 L

x = 2.25 moles

Now;

1 mole of P4 reacts with  6 moles of Cl2

x moles of P4 reacts with 2.25 moles of Cl2

x = 0.375 moles

Thus Cl2 is the limiting reactant

Mass of the PCl3 formed =

6 moles of Cl2 produces 4 moles of PCl3

2.25 moles of Cl2 produces x moles of PCl3

x = 1.5 moles of PCl3

Mass of PCl3 = 1.5 moles * 137 g/mol

= 206 g

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Answer:

459.11 g.

Explanation:

hope this helps

Answer:

I’m not for sure

Explanation:

Answer: 5 moles of NaF would be produced when 550 grams of Sodium bromide are used.

Explanation:

From the question, the balanced chemical formula is illustrated below:

2NaBr + CaF2 → 2NaF + CaBr2

From the equation above;

Molecular mass of NaBr = 23 + 80 = 103g/ mol

Molecular mass of CaF2= 40+ (19×2)= 78g/ mol

Molecular mass of NaF = 23+19 = 42g/ mol

From the balanced chemical equation;

2 moles of NaBr reacted with 1mole of CaF to give 2 moles of NaF.

That is, 2 moles of NaBr= 2× 103 = 206g

2moles of NaF = 2×42= 84g

If 206g of NaBr yielded 84g of NaF

Therefore 550g of NaBr will yield Xg of NaF

X= 550×84/206

X= 224.27g of NaF

But 42g = 1 mole of NaF

Therefore 224.27g = X mole of NaF

X= 224.27 ×1/42

X is approximately 5moles.

No, matter never disappears as it follows the law of conservation and matter changes it form from one shape to another.

Matter is something which has both mass and shape  . There are generally considered three states of matter which are solid , gas and liquid . The matter is consists of small particles known as atoms  .

Matter can never disappear as it follows the law of conservation in which the chemical and physical alterations cause the matter to change in any other form but it is conserved which states that before and after the change has occurred the quantity of matter is always exactly the same .

Variations in temperature or pressure can cause all three forms of matter to change into one another as matter can change its shape .

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Answer:

FeBr2

it is what it is indeed

Answer:

\(\large \boxed{\text{183 g}}\)  

Explanation:

\(\begin{array}{rcl}\text{Density} & = & \dfrac{\text{Mass}}{\text{Volume}}\\\\\rho & = &\dfrac{m}{V}\\\\1.83 \text{ g$\cdot$ cm}^{-3} & = & \dfrac{m}{\text{100 cm}^{3}}\\\\m & = & \text{183 g}\\\end{array}\\\text{There are $\large \boxed{\textbf{183 g}}$ of sulfuric acid.}\)

Answer:36

Explanation:

Therefore, the estimated energies of a proton in a 5.0 fm long box are approximately:

E1 = 1.808 x 10^-13 J

E2 = 7.234 x 10^-13 J

E3 = 1.631 x 10^-12 J

The allowed energies of a particle in a one-dimensional box are given by:

E = (n^2 * h^2) / (8 * m * L^2)

Where:

E is the energy of the particle

n is the quantum number (1, 2, 3, ...)

h is the Planck's constant (approximately 6.626 x 10^-34 J*s)

m is the mass of the particle (mass of a proton = 1.673 x 10^-27 kg)

L is the length of the box (5.0 fm = 5.0 x 10^-15 m)

For n = 1:

E1 = (1^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

For n = 2:

E2 = (2^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

For n = 3:

E3 = (3^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

Now we can calculate the values:

E1 ≈ 1.808 x 10^-13 J

E2 ≈ 7.234 x 10^-13 J

E3 ≈ 1.631 x 10^-12 J

Therefore, the estimated energies of a proton in a 5.0 fm long box are approximately:

E1 = 1.808 x 10^-13 J

E2 = 7.234 x 10^-13 J

E3 = 1.631 x 10^-12 J

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Answer: the longest a virus that can be kept on a plastic bag is a few hours to a couple of days.

Explanation: hope that helped!(:

Answer:

tae hahahah joke lang hindi ko alam ehh

Answer:

The edge of boiling over of the substance relies upon the strength of holding between the particles, unequivocally the intermolecular powers between the atoms. The intermolecular powers that exist between the particles relies upon the idea of the atoms like extremity, sub-atomic weight, design of the atom, and so forth In testing the edge of boiling over of the two given fluids, the expansion in edge of boiling over can be noticed for the compound with higher limit. This demonstrates that there is lower intermolecular power in the compound with lower atomic weight.

Explanation:

Hope this helps

Three other pairs of liquids having different molecular masses can be tested to see if the pattern of boiling points will continue.

The boiling point of a liquid refers to the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure. Usually, the boiling point is affected by the nature of intermolecular forces in the compound.

In order to confirm whether or not the pattern of boiling point is correct, We have to get about three more pairs of compounds in which one has a lower molecular mass than the other and observe if the pattern in the values of boiling point will continue as predicted.

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As we travel down in the group, the halogens' boiling points rise. The resultant molecules may have a single carbon atom or as many as a million.

The attractive force grows as the number of electrons decreases in the group, and more energy is needed to counteract these forces, raising the boiling point.

Fluorine's boiling point of -188°C, Chlorine's of -34.6°C, Bromine's of 58.8°C, and iodine's of 184°C, as well as the trend in melting temperatures, are explained by the strengthening intermolecular interactions that bind the halogen molecules together.

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Answer:

Unbalanced

Explanation:

\(\text{Fe}(\text{NO}_3)}_3+ \text{NaOH} \rightarrow \text{Fe(OH)}_3 + \text{NaNO}_3\\\\\text{Balanced reaction:}\\\\\text{Fe}(\text{NO}_3)}_3+ 3\text{NaOH} \rightarrow \text{Fe(OH)}_3 + 3\text{NaNO}_3\)

The ranking of the given organic compounds according to the decreasing order of viscosity is CH₃CH(CH₂)₁₁CH₂CH₃ > CH₃CH₂(CH₂)₆CH₂CH₃ > CH₃CH₂CH₂CH₂CH₃, and the increasing order of viscosity is CH₃CH₂CH₂CH₂CH₃ < CH₃CH₂(CH₂)₆CH₂CH₃ < CH₃CH(CH₂)₁₁CH₂CH₃.

Viscosity is a property of material which describes the resistance of a fluid to shearing flows. Viscosity corresponds roughly to the intuitive notion of a fluid's thickness. For example, honey has a much higher viscosity than water.

Viscosity is measured by using a device known as viscometer. Measured values of viscosity span several orders of magnitude. Among all the fluids, gases have the lowest viscosities, and thick liquids have the highest.

The above mentioned hydrocarbon has different viscosity and hence they are arranged in order of their viscosity.

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Answer:

Nitrogen has 7 protons and 7 electrons and 7 neutrons.

Explanation:

The atomic number of an element is the number of electrons and protons they have. The atomic mass - the atomic number of an element equals the number of nuetrons. The atomic mass of nitrogen is 14 and the atomic number is 7 therefore we have to subract, 14-7=7.

Answer: The percent composition of oxygen is 54.5%

Explanation:

Below I have attached my work through, but essentially the percent composition relies on finding the mass of the oxygens and dividing it by the mass of the whole compound. The masses of the elements can be found on the periodic table and added together to get a mass of the whole compound- ascorbic acid. Then, you turn this proportion into a percent by multiplying by 100%.

Answer:

54.5% is the correct answer

Answer:

frequency

Explanation:

because a wave is equally a frequency

The relationship regarding the quantities of reactants and products associated with the decomposition of hydrogen peroxide that is not correct is: D) 68.0g of hydrogen peroxide does not decompose to produce 36.0g of water and 32.0g of oxygen.

In the given chemical equation for the decomposition of hydrogen peroxide, the stoichiometry indicates that for every 2 moles of hydrogen peroxide, we obtain 2 moles of water and 1 mole of oxygen. This implies a 2:2:1 ratio in terms of moles.

Option D states that 68.0g of hydrogen peroxide decomposes to produce 36.0g of water and 32.0g of oxygen. However, this relationship is incorrect based on the molar masses of hydrogen peroxide, water, and oxygen. The molar mass of hydrogen peroxide (H₂O₂) is approximately 34.0g/mol, while the molar mass of water (H₂O) is approximately 18.0g/mol and the molar mass of oxygen (O₂) is approximately 32.0g/mol.

Therefore, 68.0g of hydrogen peroxide would correspond to approximately 2 moles of hydrogen peroxide, and according to the stoichiometry, this would produce 2 moles of water (approximately 36.0g) and 1 mole of oxygen (approximately 32.0g). Option D does not correctly reflect this relationship, making it the incorrect statement regarding the quantities of reactants and products associated with the reaction.

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The complete question is:

Hydrogen peroxide decomposes to produce water and oxygen. Which relationship regarding the quantities of reactants and products associated with this reaction is not correct?

2H₂O₂ --> 2H₂O + O₂

Answer:

The symbol is the right answer.

Explanation:

The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.

The letters of the alphabet are used by chemists as symbols in chemistry.

The “ Symbol” is the correct answer because the chemist uses the letters of the alphabet to denote the element. For instance, the element sulfur is denoted by the letter of the alphabet “S”, the hydrogen is denoted by the letter of the alphabet “H”. Other elements that use more than 1 letter as the symbol. For example, Chlorine is represented by the Cl.

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Answer:

Explanation:

The Tacoma Narrows Bridge is the historical name given to the twin suspension bridge—originally built in 1940—that spanned the Tacoma Narrows strait. It collapsed just four months later due to aeroelastic flutter. Since then, this topic has become popular, with several case studies discussing the failure phenomenon of suspension cable bridges.

In the state of Washington, the construction of the Tacoma Narrows Bridge was completed and opened to the traffic on July 1st, 1940. It was the very first bridge to incorporate a series of plate girders as roadbed support, and the first bridge of its type (cable suspension). It was also the third largest suspension bridge of its time, with a 2800-foot central span and two side spans of 1100 feet each.

A west-side approach had a continuous steel girder of 450ft, while the east side had a long reinforced concrete frame of 210ft.  It had two cable anchorages of 26ft. along roadways, two 5ft. sidewalks and two 8ft. deep stiffening girders. Among several other structural details, the suspension cable anchorages to which the cables were connected were made of 20,000 cubic yards of concrete, 6 lakh pounds of structural steel, and 2.7 lakh pounds of reinforcing steel. Because of its extremely long length, it was considered a ‘narrow bridge’. The overall construction cost was estimated to be a whopping $6 Million in 1940. Considering inflation, this is equivalent to almost $1 Billion, and all of this for something that lasted just four months and seven days. Yet, this remains a great engineering feature for civil engineers to ponder over.

Answer:

Pull with less force, Add an apple to the basket, and Roughen the surface of the table to increase friction

Explanation: