when solid surfaces slide over each other, the kind of friction that occurs is _ friction

Answer:

d) 0.0962 L

Explanation:

The problem describes a dilution process, meaning that we can solve it by using the following equation:

Where subscript 1 stands for the volume and concentration of the concentrated solution, and 2 for those of the diluted solution. That means that in this case:

We input the data:

And solve for V₁:

Finally we convert 96.2 mL to L:

The answer is thus option d).

Answer: This reaction will not occur, therefore it cannot be balanced.

Only certain metals reactive enough are able to replace a hydrogen on an acid. This only occurs if the metal is higher on the activity series than hydrogen. In this case Copper is not higher than Hydrogen on the activity series, thus it cannot replace the hydrogen. Meaning No Reaction.

Answer:

C would be the right answer

Answer:

B

Explanation:

I have a similar question and it was correct try B

The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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Answer:

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

Explanation:

Crayon is paraffin wax. The specific heat of paraffin wax is 2.14 J/g°C

As we know

\(Q = m*c *\Delta T\)

Where

\(\Delta T\) is the change in temperature \(T_2- T_1\)

m is the mass of the object

c is the specific heat in J/g°C

Substituting the given values, we get -  

\(Q = 30 * 2.14 *(49-25)\\Q = 1540.8\)    Joules

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

Nuclear fusion: this is the joining of two small atomic nuclei into one nucleus. Nuclear fission: this is the splitting of one large atomic nucleus into smaller fragments.

In order to demonstrate that intramolecular forces are stronger than intermolecular forces, a block of ice will be heated in a sealed container until it turns into steam.

Because the forces holding together compounds are stronger than the forces holding together molecules, intramolecular forces are stronger than intermolecular forces.

Intermolecular forces exist between molecules, but intramolecular forces exist between atoms within a molecule. This is the primary distinction between intermolecular and intramolecular forces.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

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The pH of the base before the titration begins is 7.

To calculate the pH, we need to consider the concentration of the conjugate acid. Since propylamine is initially present in excess, the concentration of the conjugate acid will be negligible. Thus, the pH of the base before the titration begins will be determined by the dissociation of water.

Water undergoes autoionization to form hydronium (H3O+) and hydroxide (OH-) ions.

At 25°C, the concentration of both ions is 1.0 x 10^-7 M.

To find the pH, we can calculate the concentration of hydronium ions and take the negative logarithm

(pH = -log[H3O+]).

Therefore, the pH of the base before the titration begins is 7.

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Answer:

The answer is A  The energy released by heat in a chemical reaction

Explanation:

Answer:

I think its b part or none of above

Answer:

B

Explanation:

electron.elements of the same group have the same electrons

The half life is the time taken for only one of the half  of the radioactive substance to remain.

The half life is the time taken for only one of the half  of the radioactive substance to remain. We can see the half life by looking at the graph and observing the point at which the sample decreases to half its original number.

Since the half life of carbon-14 is 5700 years, after ten half lives, almost 60000 years has elapsed thus there is little or no carbon-14 left. As a result of this carbon-14 can not be used if the sample is over 60000 years old.

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The total binding energy for lithium is 39.25 Mev

The binding energy per nucleon for lithium is 5.61 Mev / nucleon

    Binding energy is the total energy required for the breakdown of a nucleus to its component nucleons

    Total binding energy is the amount of energy released when the atom is formed from its constituent electron, protons and neutrons.

The given mass are lithium is 7.016004 u  and hydrogen is 1.007825

There are 3 hydrogen and 4 neutrons

To calculate the Total binding energy

3 ( 1.0782) +  4 ( 1.008665 ) = 7.058135 u

Mass of neutron is 1.008665 u

1 atomic mass unit is 931.5 Mev

TBe = ( 7.058135 - 7.016004 ) × 931.5

       = 39.25 Mev

Total binding energy is 39.25 Mev

BE= 39.25 / 7

    = 5.61 Mev / neucleon

Hence, The total binding energy is 39.25 Mev.

             The binding energy is 5.61 Mev / neucleon.

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Answer: 2 The Proximity toward the ocean

Explanation:

May i plz have brainiest  

First, we have to know the rules to recognize significant numbers:

Zeros between two non-zero digits ARE significant.

are

All non-zero numbers are significant.

Trailing zeros to the right of the decimal are significant.

Leading zeros are not significant.

Trailing zeros in a whole number with the decimal shown are significant.

Trailing zeros in a whole number with no decimal shown are not significant.

After these rules, we can say that 890 has only 2 significant numbers.

Answer: 2 significant digits

From what we know we can confirm that currently, the primary source of sulfur dioxide of emissions into the atmosphere is coal and other fossil fuel burning in industry.

From what we know, this compound has proved to be quite toxic for humans to breathe. Increased concentrations of this in the atmosphere lead to increased rates of lung disease among other health complications.

Therefore, we can confirm that the primary source of sulfur dioxide of emissions into the atmosphere is coal and other fossil fuel burning in industry.

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The equilibria studied in the lab procedure include sodium chloride and potassium iodide.

Sodium chloride (NaCl) and potassium iodide (KI) are both ionic compounds that are soluble in water. When they are dissolved in water, they dissociate into their constituent ions.

NaCl dissociates into sodium ions (Na+) and chloride ions (Cl-), while KI dissociates into potassium ions (K+) and iodide ions (I-)

When solutions of NaCl and KI are mixed together, the following reaction takes place:

NaCl + KI → NaI + KCl

The products of this reaction are sodium iodide (NaI) and potassium chloride (KCl).

This reaction is a double displacement reaction, also known as a metathesis reaction, where the cations and anions of two different ionic compounds exchange places to form two new ionic compounds.

The reaction can also be represented using ionic equations:

Na+ (aq) + Cl- (aq) + K+ (aq) + I- (aq) → Na+ (aq) + I- (aq) + K+ (aq) + Cl- (aq)

Overall, the reaction is a neutralization reaction because Na+ and K+ cations from NaCl and KI, respectively, switch partners with the I- and Cl- anions from KI and NaCl, respectively.

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The equilibrium concentration of fluoride ion is 0.0000726 M (rounded to the fifth decimal place). To find the equilibrium concentration of the fluoride ion (F⁻) in the solution, we need to use the Ksp expression:

Ksp = [Pb²⁺][F⁻]²

We know the Ksp value for lead(II) fluoride is 3.3 x 10⁻⁸, and the concentration of Pb²⁺ in the solution is 0.18 M (since it is in excess).

Let's assume that x is the equilibrium concentration of F⁻. Then, we can set up an ICE table:

Initial: [Pb²⁺] = 0.18 M, [F⁻] = 0 M
Change: -x, +2x, +x
Equilibrium: 0.18 - x, 2x, x

Now, we can substitute the equilibrium concentrations into the Ksp expression:

3.3 x 10⁻⁸ = (0.18 - x)(2x)²

Simplifying and solving for x:

3.3 x 10⁻⁸ = 4x³ - 7.2 x 10⁻²x² + 3.24 x 10⁻⁴x
x = 7.26 x 10⁻⁵ M

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Answer:

1: X and Y

2: A

Explanation:

Answer:

the last picture is showing a Change in motion about to occur

Baby oil is primarily composed of mineral oil, which is a mixture of hydrocarbons. The Lewis structure of hydrocarbons consists of carbon and hydrogen atoms connected by single, double, or triple bonds.

Baby oil is not a single compound but a mixture of hydrocarbons, which are organic compounds composed of carbon and hydrogen atoms. These hydrocarbons are obtained from the distillation of petroleum or mineral oil. The Lewis structure represents the arrangement of atoms and their bonds in a molecule.

For hydrocarbons, carbon atoms usually form four bonds, while hydrogen atoms form one bond. The bonds between carbon and hydrogen atoms can be single, double, or triple, depending on the specific hydrocarbon. In the case of mineral oil, the hydrocarbons are predominantly alkanes, which have single bonds between the carbon and hydrogen atoms.

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As molecules move through glycolysis, the carbons from glucose generally become more phosphorylated.

What is glycolysis?

Glycolysis is the process that breaks down glucose into pyruvate and releases ATP.

It is the first stage of cellular respiration, which generates energy for cells to use in the form of ATP.

Glycolysis can occur in both aerobic and anaerobic conditions, and it takes place in the cytoplasm of the cell.

Phosphorylation refers to the addition of a phosphate group to a molecule. In glycolysis, glucose is phosphorylated twice to form fructose-1,6-bisphosphate.

This step requires the input of two ATP molecules to proceed. Then, fructose-1,6-bisphosphate is broken down into two three-carbon molecules, which are further phosphorylated to form two molecules of pyruvate.

Overall, four ATP molecules are generated during glycolysis, but two are used up in the initial phosphorylation steps. Hence, the net yield of ATP from glycolysis is two molecules.

So, as molecules move through glycolysis, the carbons from glucose generally become more phosphorylated.

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The earth’s magnetic poles are in the general direction of the planet’s geographic poles. the phrase "general direction" mean  different and complete opposite way.

A bar magnet that is suspended freely will always point north-south. This is a result of the bar magnet's south pole being drawn to the Earth's magnetic north pole (geographic south).

Geographic and magnetic poles on Earth are generated by various sources, thus they are not perfectly aligned. The outer core's swirling currents of liquid iron are what generate the Earth's magnetic field.

Thus, Option D is correct.

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Chapter One of the book "The Disappearing Spoon" by Sam Kean is titled "Ruthenium, Rhodium, and Palladium." This chapter explores the fascinating history, properties, and uses of these three elements from the periodic table.

The chapter begins with the story of a chemical spill in the town of Norilsk, Russia, which is home to the world's largest nickel mine. The spill caused massive environmental damage and raised concerns about the toxic effects of metals.

This incident sets the stage for the exploration of elements that possess unique properties and have played significant roles in scientific and industrial advancements.

The author then introduces the readers to the periodic table and its significance in understanding the behavior and characteristics of elements. He explains the arrangement of elements and how they are grouped based on their chemical properties.

Moving on, Kean delves into the history and properties of ruthenium, rhodium, and palladium. He shares interesting anecdotes about their discoveries, including the challenges faced by scientists in isolating and identifying these elements. The author highlights the rarity and value of these metals and their importance in various fields, such as catalysis, electronics, and jewelry making.

Furthermore, Kean discusses the cultural and societal impact of these elements, including their use in the automotive industry, where palladium plays a crucial role in catalytic converters. He also explores the darker side of these elements, such as their involvement in illegal activities, including theft and smuggling.

Overall, Chapter One of "The Disappearing Spoon" provides an engaging introduction to the world of elements and sets the stage for further exploration of the periodic table and its fascinating stories.

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3.3256 Liters

See the image I have shared to you above

Answer:

B. 7.2k

Explanation:

took the test ;)

Answer:

The correct option is;

Scientists can drill deep into the ice to collect ice cores which contain trapped atmospheric gases

Explanation:

The study of past climates also known as paleoclimatology, is accomplished by acquiring information from proxy data sources which are physical environment characteristics that are preserved through time to remake the conditions of past climate

Past physical environmental characteristics, from which information about ancient climate can be gained are stored in nature's climate variability records including, ice cores, rings in tree stems, fossil pollen, sediments found in the waters of the ocean

The proxy sources provide a means of understanding the conditions of ancient climate before advent of climate measurement.

Therefore, one way that analyzing ice benefits scientists who study ancient climates is that scientists can drill deep into the ice to collect ice cores which contain trapped atmospheric gases from past climates.

Answer: B: Scientists can study the layers of ice cores to gather information about past atmospheric composition.

Explanation: Got it right on a test!

Answer:

Element X is Cs or cesium

Answer:

A

Explanation: