Andy filled four glasses with water at different temperatures as shown under each glass. Water vapor will condense, turn into a liquid, first on the outside surface of Glass _______. A) Glass 1 B) Glass 2 C) Glass 3 D) Glass 4 The first glass is 85 C, Second is 56 C, 3rd is 30 C, 4th is 5 C. (hint C is Celsius)

1320 N Is Correct Hope this helps

Noble gases, including helium, neon, and argon, exhibit evidence supporting the atomic model's claim of stability when outer energy shells are filled. Their unreactive nature and stable configurations are due to having a full valence shell, providing concrete evidence within this atomic model.

According to the current model of the atom, atoms are most stable when their outer energy levels, or valence shells, are filled. This aligns perfectly with the properties exhibited by noble gases. Noble gases, which include helium, neon, and argon, to name a few, all have a full outer valence shell. This configuration makes them extremely stable, as the full valence shell of each noble gas atom results in a large ionization energy, denoting their resistance to giving up an electron. In addition, the introduction of an extra electron would place it in a higher energy level that is loosely bound, which is undesirable.

The properties of noble gases provide evidence for the atomic model's claim of stability. Their lack of reactivity is tied directly to their filled outer energy shells, demonstrating that atoms with a completed outer shell are most stable. This evidence supports the principle of the atomic model that by filling each energy level from the shell closest to the nucleus to the outermost shell, atoms achieve their most stable state. This model also explains why other elements engage in bond formation with other atoms to achieve full electron capacity and stability.

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Mass is the term that refers to the amount of matter an object has. It is a constant property of an object and doesn't change with location. It can be measured using units like grams or kilograms.

The amount of matter that makes up something is known as its mass. It displays the volume of matter that an object holds. This doesn't change, regardless of where the object is located. For example, whether a particular rock is on Earth or on the Moon, its mass - the amount of matter it is composed of - remains consistent. To measure mass, we generally use units such as grams (g) or kilograms (kg) in the metric system, or ounces (oz) and pounds (lb) in the imperial system.

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Answer:

your correct

Explanation:

Values we get are:

[[tex]H_3O^+[/tex]] = 2.51 × [tex]10^{-5[/tex] M

[[tex]OH^-[/tex]] = 3.98 × [tex]10^{-10[/tex] M

To calculate the concentrations of [tex]\(H_3O^+\)[/tex] and [tex]\(OH^-\)[/tex] ions in the urine sample with a pH of 4.60, we'll use the relationship between pH, [tex]\(H_3O^+\)[/tex] concentration, and [tex]\(OH^-\)[/tex] concentration in water.

The pH of a solution is defined as the negative logarithm (base 10) of the [tex]\(H_3O^+\)[/tex] concentration:

[tex]\[ \text{pH} = -\log[H_3O^+] \][/tex]

Given that the pH of the urine sample is 4.60, we can rearrange the equation to solve for [tex]\(H_3O^+\)[/tex] concentration:

[tex]\[ [H_3O^+] = 10^{-\text{pH}} \][/tex]

Substitute the pH value:

[tex]\[ [H_3O^+] = 10^{-4.60} \][/tex]

Calculate [tex]\(H_3O^+\)[/tex] concentration:

[tex]\[ [H_3O^+] = 2.51 \times 10^{-5} \, \text{M} \][/tex]

Now, since water at 25°C is neutral, the product of [tex]\(H_3O^+\)[/tex] and [tex]\(OH^-\)[/tex] concentrations is [tex]\(1.0 \times 10^{-14}\)[/tex] M². Using this relationship, we can find the [tex]\(OH^-\)[/tex] concentration:

[tex]\[ [OH^-] = \frac{1.0 \times 10^{-14}}{[H_3O^+]} \][/tex]

Substitute the value of [tex]\(H_3O^+\)[/tex] concentration:

[tex]\[ [OH^-] = \frac{1.0 \times 10^{-14}}{2.51 \times 10^{-5}} \][/tex]

Calculate [tex]\(OH^-\)[/tex] concentration:

[tex]\[ [OH^-] = 3.98 \times 10^{-10} \, \text{M} \][/tex]

Therefore, the concentrations of [tex]\(H_3O^+\)[/tex] and [tex]\(OH^-\)[/tex] in the urine sample are [tex]\(2.51 \times 10^{-5}\)[/tex] M and [tex]\(3.98 \times 10^{-10}\)[/tex] M, respectively.

Question:-

If a urine sample has a pH of 4.60, calculate the concentrations of [tex]H_3O^+[/tex] and OH in the sample.

The ribosomes make proteins, and the nucleus stores genetic information. Hence option B is correct.

Ribosomes are defined as a protein- and RNA-based intercellular structure that serves as the cell's location for protein synthesis. Protein synthesis is always carried out by the ribosome, which converts the genetic code produced in mRNA into an amino acid sequence.

Protein synthesis takes place at the ribosome, whereas respiration is carried out by the mitochondria, water and other nutrients are stored in the vacuole, and the cell is controlled by the nucleus. A ribosome is a sophisticated macromolecular component of the organism that aids in translation. All live cells must do this vital action in order to produce proteins and a variety of other biological components.

Thus, the ribosomes make proteins, and the nucleus stores genetic information. Hence option B is correct.

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Answer:

1.- Oldest rock in the Earth

2.- Rocks of the moon

3.- Rocks of the meteorites

Explanation:

1.- In our Earth, there has been different studies that show the age of different layers in our planet by radiation, in this way, we can imagine how has been changing the surface trough this millions of years.

2.- By sonic sounds, the rocks of the moon can be analyze to calculate it relative age, and how this is corresponding to the age of our planet.

3.- Finally, another evidence of our Earth age, is by comparing the mass of different space bodies with our planet.

Hope this info is useful.

Answer:

The study of rocks, especially sedimentary rocks that formed underwater but are no longer underwater, is the primary source of information about the earth's age. The second line of geological evidence that the earth might be very old came from fossils. And finally, examining radioactive elements and estimating the age of rocks using certain rates of radioactive element decay is a third line of geological evidence for the age of the Earth.

Explanation:

Geothermal energy has advantages such as being renewable, producing no greenhouse gas emissions, and being reliable. Biomass energy is advantageous because it is renewable and provides a constant energy supply, but it also has disadvantages such as competition with food production, low energy efficiency, and the emission of smoke and pollutants.

Geothermal energy has several advantages, including:

Biomass energy also has advantages and disadvantages:

Answer:

Frequency

Explanation:

The hot plate continually adds heat energy to the water, increasing the kinetic energy of water molecules. This results in accelerated molecular motion, often leading to a state change if sufficient energy is added.

The hot plate is an example of an external source of energy that continually adds heat energy into the water system. This additional energy causes the water molecules to increase their motion. Essentially, the water molecules absorb the heat energy, which increases their kinetic energy. The result is a state of accelerated molecular motion, often leading to a phase change from liquid to gas, assuming sufficient energy is added. This scenario essentially demonstrates the concept of thermal energy transfer and the effect of heat on molecular motion.

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Intrusive rocks have large mineral crystals

Most igneous rocks that formed from magma have small mineral crystals but intrusive rocks have comparatively larger crystals. Intrusive igneous rocks cool from magma slowly because they are buried beneath the surface, so they have large crystals. A common example is the granite which is an igneous rock that is composed of four minerals. These minerals are quartz, feldspar, mica, and usually hornblende and its crystals are big in size.

Answer: C. high melting point

Explanation:

Physical property is defined as the property of a substance which becomes evident during physical changes. Example: melting point

Chemical property is defined as the property of a substance which becomes evident during chemical changes. Example: Reactivity with other substances , acidity, basicity , chemical composition

Acidity is the number of [tex]OH^-[/tex] ions a substance releases on dissolving in water.

Basicity is the number of [tex]H^+[/tex] ions a substance releases on dissolving in water.

Thus high melting point is the physical property of halite.

Answer: The object will move in the South direction.

Explanation: We are given an object of 400 N and force acting on it is 420 N from the north direction, it means the force is acting towards south.

The object will move in the direction of the net force, which is south direction.

Hence, the correct option is A.

Final answer:

Explanation of how to balance the chemical equation C₆H₅Cl + O₂ → CO + 2H₂O + HCl in a detailed manner.

Explanation:

The balanced equation:

C₆H₅Cl + 5O₂ → 6CO + 2H₂O + 2HCl

In this balanced chemical equation, each type of atom is balanced on both sides of the reaction by adjusting the coefficients of the compounds. For example, to balance the carbons, 6CO is needed on the product side. Also, 5 oxygen molecules are needed to balance the oxygen atoms.

The described crumbly, weak, red-brown metal is likely to be copper or copper(II) oxide if in a degraded state. Metals like copper are generally shiny, ductile, malleable, and conduct electricity and heat well due to the sea of delocalized electrons in their structure.

The solid described as crumbly, weak, red-brown, and probably a metal as found on the periodic table is likely to be copper. Copper is a metal that is malleable and ductile and is known for its red-brown color. However, if the metal is weak and crumbly, it may have oxidized to form copper(II) oxide (CuO), which is not as strong as metallic copper. This could happen due to exposure to elements like air or moisture over time.

Overall, metals are generally hard, opaque, shiny, and have good electrical and thermal conductivity. They are most often found on the left side and towards the middle of the periodic table. The properties of metallic solids like copper can include a high degree of malleability and good electrical conductivity due to the sea of delocalized electrons within their structure.

The correct term to describe neon is B) element.

Neon is a gas that's made up of one type of atom, making it an element. This noble gas is found in the air and is used in neon signs, where it emits a red-orange glow when electrified. Each neon atom has a total of 10 electrons, with 8 in the outer shell, and exists as a monatomic gas in its physical state rather than as a molecule, which generally comprises two or more atoms bonded together. Thus, the term that best describes neon is element.

A stationary front is when a warm air mass and a cold air mass meet and push against each other without movement, often causing prolonged periods of clouds and precipitation.

When a warm air mass and a cold air mass meet and neither moves the other out of the way, it is called a stationary front. In this scenario, the two air masses are equally matched in strength, creating a boundary where they both push against each other without significant movement. This often leads to an extended period of cloudiness and precipitation over a region, with the weather condition persisting until one air mass finally gives way to the other.

When the net force acting on a body is not equal to zero, then the body will be in a state of motion in the direction of the greater magnitude of force. Hence, diagrams B and D indicate motion. Hence, option D is correct.

Calculating the net force in each scenario :

Diagram A :

Fgrav - Fnorm = 3 - 3 = 0

Ffric - Fapp = 5 - 5 = 0

Net force = 0 (No motion)

Diagram B :

Fgrav - Fnorm = 3 - 3 = 0

Ffric - Fapp = 5 - 0 = 5

Net force = 5N (in the direction of the frictional force)

Diagram C:

Fgrav - Fnorm = 20 - 20 = 0

Ffric - Fapp = 0

Net force = 0 (No motion)

Diagram D:

Fair - Fgrav = 40 - 25 = 15N

Ffric - Fapp = 0

Net force = 15 N (in the upward direction)

Therefore, the diagrams B and D exhibits motion.

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Chemical equations are symbolic depictions of chemical reactions where the reactants and products are stated in terms of their respective chemical formulae.

The correct answer is B. Put a "2" in front of the KOH.

K2O + H2O → KOH

K2O + H2O → KOH

K2O + H2O → 2KOH.

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Answer:

This question appears incomplete

Explanation:

Filtration is a physical process that is used to separate a mixture of solid solute from a liquid solvent. It requires the use of a filter paper which allows the passage of the liquid component of the mixture while the solid solute remains on the filter paper.

The liquid solvent that passes through the filter paper is called filtrate while the solid solute that remains on the filter paper is called filtride.

Filtration is can only be used to separate mixtures but not compounds.

A mixture is substance containing two or more constituents that are physically combined while a compound is a substance containing two or more atoms that chemically combined.

A common example of filtration process is the separation of a mixture of water and stone.  This mixture is poured over a filter paper, the water passes through the filter paper while the stone remains on a filter paper

Final answer:

The identity of an element is determined by its atomic number, the number of protons in the nucleus, which differentiates it from other elements and defines its chemical properties.

Explanation:

The identity of an element is determined by its atomic number (Z), which is the number of protons in the nucleus of an atom of that element. Each element has a unique atomic number, making it distinct from others. The elements are arranged on the periodic table in order of increasing atomic number. In electrically neutral atoms, the number of electrons is equal to the number of protons, providing the element with its unique chemical properties. Isotopes of an element have the same atomic number but different numbers of neutrons. The mass number, which is the sum of protons and neutrons, helps further characterize different isotopes of an element.

Final answer:

Fireworks are made through a chemical reaction triggered by activation energy, provided by lighting the fuse, leading to a colorful display of atoms emitting energy. The discovery of gunpowder was a critical step in the ability to create such displays, involving the precise mix of chemicals for different effects.

Explanation:

How Fireworks Are Made:

Fireworks, a spectacle of light and sound, celebrate joyous occasions through the controlled use of explosive materials. Their brilliant, colored lights are the result of atoms emitting energy when their electrons transition between energy levels. Activation energy is essential for the chemicals inside a firework to react, which happens when the fuse is ignited, providing heat to the system.

Upon reaching the correct altitude, a fireworks rocket explodes, releasing thousands of glowing fragments in a display of conservation of momentum and center of mass. Each fragment takes part in the beautiful, cascading display, which is carefully timed and choreographed for maximum effect.

The art of creating fireworks has a long history, with the discovery of gunpowder being a fundamental step. This mixture of saltpetre, sulphur, and charcoal, when ignited, produces the explosive force that propels fireworks into the sky. Once airborne, precise compositions of various chemicals within the firework determine the colors and patterns observed.