Sam believes the rock is more denser than the pencil. He measured the mass of the rock to be 8.5 grams and volume to be 4.5mL. He measured the mass of the pencil to be 2.4 grams and volume to be 4.5mL. Density is the mass per unit volume of an object. When he put the rock and pencil into the water, the pencil floated and the rock sank. Which is more denser? Give your reasoning using actual density values.

Answer:

A picture .There is high reactions in progression still the energy reaction reduced to indicate complete reaction.

Answer:

pic 3

Explanation:

(A) ON EDG2021

The following statement is true about the given reaction:The statement that is true about the given reaction is:"51g of water is produced for every mole of Na3C6H5O7.

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Answer:

Explanation:

1 )  D)5,000,000

Compared to the chemical oxidation of one atom of carbon, a nuclear fission reaction using one atom of uranium can yield about 5000000____ times the energy output.

Energy in fission reaction comes from the conversion of mass into energy . This process results into creation of enormous amount of energy . But in the oxidation reaction of carbon , bonds are broken and new bonds are formed in which energy is used and released . The net energy released is difference of energy evolved minus energy used up . This difference is not much . Hence in such chemical reaction , energy released is not much .

2 ) B)The mass number is just an estimated mass measurement that is not precise.

In such calculation , the mass number used is just an estimated mass number and not the precise mass of particles involved . Hence , due to lack of precision in calculation , mass number appears to be constant . But actually there is decrease in mass in both fission and fusion reaction .

3 )  D

In fission reaction , large atomic nuclei splits into smaller nuclei to attain stability .

Answer:

true

Explanation:

The mass of 2.23 × \(10^{23}\) atoms of sulfur will be approximately equal to 11.9 grams.

One Sulphur atom has a mass of about 32.06 atomic mass units (u). As a result, the mass of 2.23 × \(10^{23}\) Sulphur atoms can be estimated as follows:

Mass is determined by multiplying the number of atoms by the mass of one atom.

mass = 7.15 × \(10^{24}\) u

We can use the following conversion factor to change the mass from atomic mass units to grammes:

1 u = 1.66054 × \(10^{24}\) g

Mass = 1.19 x 101 g mass = 7.15 × \(10^{24}\) u x 1.66054 x 10-24 g/u mass = 11.9 grams

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The statements about diels alder reaction which are true are given in the explanation part.

The following statements about the Diels-Alder reaction are true:

- True: It is a reaction involving pi-electrons.
- True: It is a concerted reaction, meaning that it occurs in a single step without the formation of reaction intermediates.
- False: It is not necessarily favored by entropy considerations, as the reaction can be endothermic and enthalpy-driven.
- True: It is a [4+2] cycloaddition, meaning that it involves the formation of a 6-membered ring from a 4-carbon diene and a 2-carbon dienophile.
- False: While some Diels-Alder reactions can be thermal, others require specific conditions such as high pressure or the use of a catalyst to occur.
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simple molecules contain two atom bonded together

Answer:  Simple Molecule

Explanation:  Ambigous question.  What is the scientific definition of "simple molecule?"  More by process of elimination than actual difinition, this is a simple molecule.  It takes a minum of two atoms to make a molecule (by definition).  A crystal is a collection of molecules, a polymer is a chain of molecules, and a complex molecule is, er  . ., complex.  The only reasonable, and best, answer is "simple molecule."

In the given reaction, if chlorine is the more electronegative element, the formation of the compound SCl2 (sulfur dichloride) would occur.

Electronegativity is a measure of an element's ability to attract electrons towards itself in a chemical bond. Chlorine is more electronegative than sulfur, which means it has a stronger pull on electrons. In the reaction, the chlorine molecule (Cl2) would react with sulfur (S) to form sulfur dichloride (SCl2). The more electronegative chlorine atoms would attract the bonding electrons closer to themselves, resulting in a polar covalent bond. This means that there would be partial positive charge on the sulfur atom and partial negative charges on the chlorine atoms in the SCl2 molecule. The reaction can be represented as:S + Cl2 → SCl2. Overall, when chlorine is the more electronegative element, sulfur dichloride (SCl2) would form as a result of the reaction between sulfur and chlorine.

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Answer:

5.12x10¹¹ millimeters

Explanation:

Milli is a prefix used in science and engineering to decribe the number as the exponent x10⁻³. In the prefix kilo, the number is at the exponent x10³.

5.12x10⁵ kilometers are:

5.12x10⁵ kilometers * (1000m / 1km) = 5.12x10⁸ meters

5.12x10² meters * (1m / 1000millimeters) = 5.12x10¹¹ millimeters

Most of the atom is empty space is true about the structure of the atom. Option B is correct.

Atomic structure will refers to the structure of an atom which is comprising a nucleus (centre) in which the protons (positively charged) as well as neutrons (neutral) are present. The negatively charged particles known as electrons which revolve around the centre of the nucleus.

The majority of the mass of an atom is concentrated in its nucleus, which is comprised of protons and neutrons. Electrons occupy the space around the nucleus, forming a cloud-like electron cloud that takes up much more space than the nucleus. Neutrons are found inside the nucleus, along with protons.

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--The given question is incorrect, the correct question is

"which is true about the structure of the atom? select the correct answer below: A) most of the mass is outside the nucleus. B) most of the atom is empty space. C) electrons are found inside the nucleus. D) neutrons are found outside the nucleus."--

Answer:

Earnings based on how much they sell

Explanation:

A sales presentation can be defined as series of talk given by a salesperson with the attempt to persuade someone or a potential customer to buy a particular product, by giving information it. Some salespersons resort to the use of dramatics so as to initiate and close the sale of a particular product by engaging in series of theatrical actions.

In sales and marketing, the term closing with respect to a sales can be defined as the process of making a business sale successful such as through the exchange of money for a particular product or goods.

For a salesperson to be able to close a sales, he or she require abilities such as courage, negotiation skills, listening ears and interpersonal skills to do so or achieve a successful sales. After a successful sales, they're entitled to a percentage of the amount made from selling a particular product or closing a deal based on what is stated in the contract. These amount of money earned with respect to each sales is generally referred to as commissions.

Commission can be defined as an amount of money earned based on how much a salesperson sell.

The percent sugar concentration in orange soda is approximately 13.24%.

The volume of orange soda is given as 355 mL and its density is given as 1.043 g/mL. According to the nutrition label, there are 49 g of sugar in a 355 mL serving of orange soda.Using the density, we can convert the 355 mL volume into grams as follows:Volume = 355 mL; Density = 1.043 g/mL; Mass = ?To convert mL to g we need to multiply the volume with the density. Thus,Mass = Volume x Density= 355 x 1.043= 369.965 gThus, the mass of a 355 mL serving of orange soda is approximately 369.965 g.Next, we can calculate the percentage of sugar in the beverage as follows:Percent sugar concentration = (Mass of sugar / Total mass of beverage) x 100%Percent sugar concentration = (49 g / 369.965 g) x 100%Percent sugar concentration = 0.1324 x 100%Percent sugar concentration = 13.24%Therefore, the percent sugar concentration in orange soda is approximately 13.24%.

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Answer:

False, it's not an example of a resonance structure.

Answer:

you did not add a question so I cannot help you out sorry

Explanation:

Answer:

Static electricity is the result of an imbalance between negative and positive charges in an object. ... When two materials are in contact, electrons may move from one material to the other, which leaves an excess of positive charge on one material, and an equal negative charge on the other.

Answer: 1) Contact between two substances.

Explanation:

#1 When fuel is running through pipes, there is a lot of contact between the fuel and the pipe.

#2 Before, people thought that Static at first was caused by friction, meaning the rubbing (of an object, pause) had something to do with static.

End note: Your welcome. My apologies if I was late, I was trying to find the answer to this question, too, until I got all this information while taking notes from my Physical Science lesson.

Answer:

noble gases from what i learnt

Because NaCl takes more energy to break it's bigger.

For NaCl, the structure or lattice formation enthalpy is -787 kJ mol-1. Therefore, the lattice dissolution enthalpy is always positive and the lattice formation enthalpy is always negative. The reason that NaCl has the highest lattice enthalpy is that for similar anions, cations with smaller radii have higher lattice enthalpies.

If we want to talk about the amount of energy released when a lattice forms from scattered gas ions we should use the lattice formation enthalpy. MgO has a higher lattice energy because each ion carries two unit charges compared to one in NaCl. NaCl is a compound with higher lattice energy. Description Lattice energy is defined as the energy released when the combination of its constituent ions forms one mole of an ionic compound.

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Easier and pollutuion are correct answer of this question . Click oil basics and use the information to complete this passage that discusses how plastic production affects society.

What is Pollution?

Pollution, also known as environmental pollution, is the addition of any material (solid, liquid, or gas) or energy (such as heat, sound, or radioactivity) to the environment at a rate greater than it can be dispersed, diluted, decomposed, recycled, or stored in an innocuous form. The three basic sources of pollution—air, water, and land—are frequently categorised according to their effects on the ecosystem. Modern society is also concerned about certain types of pollution, such as plastic, light, and noise pollution. The environment, wildlife, and human health are all routinely negatively impacted by pollution of many forms.

Therefore, pollution can be defined simply as something that contaminates the environment. Pollution is the presence of dangerous compounds in the air, land, and water that can harm both living things and the environment. referring to dangerous substances that are released or brought into the environment, such as hazardous gases, liquids, or other poisonous materials. Pollutants, contaminants, or dangerous chemicals are other factors that contribute to the environment's unsuitability or safety, as are poisonous materials that contaminate the soil and the air. Pollution is another unavoidable side consequence of actions that disturb the ecosystem's biodiversity. Additionally, it jeopardises the environment's ability to endure.

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The points on the y-intercepts are (0,y) whereas the point on the x-intercept are (x,0). Here the y-intercept of the function f(x) = -x + 2 is 2.

When the line touches the y-axis, we can say that these are y-intercepts. The y-intercept can be found out when x = 0. This represents the point at which the graph crosses through the y-axis. The y-intercept can also be referred as y-value.

In order to find the intercepts of any function, we must find the coordinates of the point where the function intersects the x and y axis. This can also be done by equating the independent or dependent variable value as 0 and then finding out the other value.

Here the given function is:

f(x) = -x + 2

When we put x = 0, then

f(x) = -0 + 2 = 2

Thus the y-intercept is 2.

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Answer:

Explanation:

It's 112-100÷100*100= so 112-100 it's 12÷100 its 0.12 and *100 it's 12%

The given statement " William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms" is false.

The mass spectrograph was not invented by William Aston. It was actually invented by J.J. Thomson in the early 20th century.

J.J. Thomson's work with the mass spectrograph led to the discovery of isotopes, which are different forms of an element with the same number of protons but different numbers of neutrons. Isotopes have different masses, and the mass spectrograph allowed scientists to separate and analyze them based on their mass-to-charge ratio.

The process of using a mass spectrograph to determine the mass and percent abundance of isotopes is known as mass spectrometry. It involves ionizing a sample, separating the ions based on their mass-to-charge ratio, and detecting the ions to determine their abundance.

The completed question is given as,

State true or false

William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms.

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The pH at the endpoint recorded in the datasheet should be compared to this calculated pH value. If they are similar, it indicates that the endpoint of the titration was reached accurately and precisely.

OH- (aq) + HT (aq) ⇌ T2- (aq) + H2O (l)

I 0.1 M 0 0

C -x -x +x

E 0.1-x -x +x

Ks = [T2-][H+]/[HT][OH-] = 2.2 x 10^-10

Substituting the concentrations into the expression:

2.2 x \(10^{-10}\) = x²/(0.1-x)²

x = 1.48 x \(10^{-6}\)

Since [OH-] = 1.48 x \(10^{-6}\)M and [H+] = [OH-], the pH of the solution at the endpoint is:

pH = -log[H+] = -log[OH-] = -log(1.48 x \(10^{-6}\)) = 5.83

pH is a measure of the acidity or basicity of a solution, with pH values ranging from 0 to 14. It is defined as the negative logarithm of the concentration of hydrogen ions in the solution. A solution with a pH of 7 is considered neutral, indicating an equal concentration of hydrogen ions and hydroxide ions.

Solutions with a pH less than 7 are considered acidic, indicating a higher concentration of hydrogen ions, while solutions with a pH greater than 7 are considered basic or alkaline, indicating a higher concentration of hydroxide ions. The pH scale is logarithmic, meaning that a change in one pH unit represents a tenfold change in the concentration of hydrogen ions. For example, a solution with a pH of 4 is ten times more acidic than a solution with a pH of 5.

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Answer:

2 Na atoms

Explanation:

Answer:

Models 1 and 2 would be in the same group.

Explanation:

They have the same amount of valence electrons. Valence electrons are electrons in the outermost electron cloud. This means they have the same properties, therefore are in the same Group on the periodic table.

The solutes in an aqueous solution of KF in order of increasing concentration are : Lowest concentration: K+ (aq),H+ (aq),OH- (aq),F- (aq),Highest concentration: HF (aq)

In an aqueous solution of KF, K+ ions come from the dissociation of KF, but KF is a strong electrolyte and dissociates almost completely, so the concentration of K+ ions is relatively high. H+ ions are present in water due to the self-ionization of water, but their concentration is relatively low. OH- ions are also present due to the self-ionization of water, but their concentration is lower than that of H+ ions. F- ions come from the dissociation of KF, so their concentration is higher than that of OH- ions. HF is a weak acid that partially dissociates in water, resulting in a higher concentration of HF compared to the other ions in the solution.

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(C) "when the products have less enthalpy than the reactants, the reaction tends to be spontaneous" is true about the spontaneity of a reaction.

Free energy is released during spontaneous reactions, hence the sign of delta G must be negative. There are 4 distinct possible combinations because both delta H and delta S can be positive or negative depending on the specific reaction's properties.

in simple words, when a reaction's enthalpy change is negative, which means the product has less enthalpy than the reactants, the reaction will be spontaneous. So the correct option is (C) when the products have less enthalpy than the reactants, the reaction tends to be spontaneous.

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