I have a question. Does anyone have a crush on their classmates? I do!

The tire would not burst (352.75 < 800)

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

\(\rm \dfrac{P1}{T1}=\dfrac{P2}{T2}\)

P1= 220 psi

T1=22+273 = 295 K

T2=200 + 273 = 473 K

\(\tt \dfrac{220}{295}=\dfrac{P_2}{473}\\\\P_2=\dfrac{220\times 473}{295}=352.75~psi\)

Answer: A pencil

Explanation: The pencil has the least strength than the other objects.

They start with the planet furthest from us then go down the line of how many miles from us it is. Mars and Venus are the closest to us.

A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk. Planets grow in this disk by the gradual accumulation of material driven by gravity, a process called accretion. The Solar System has at least eight planets: the terrestrial planets Mercury, Venus, Earth and Mars, and the giant planets Jupiter, Saturn, Uranus and Neptune.

These planets each rotate around an axis tilted with respect to its orbital pole. All of them possess an atmosphere, although that of Mercury is tenuous, and some share such features as ice caps, seasons, volcanism, hurricanes, tectonics, and even hydrology. Apart from Venus and Mars, the Solar System planets generate magnetic fields, and all except Venus and Mercury have natural satellites. The giant planets bear planetary rings, the most prominent being those of Saturn.

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Answer:

The answer is "The First choice".

Explanation:

The whole question can be found in the file attached.

The water vapor inside the air freezes thru the entrance of its nitrogen. This is because liquid nitrogen has a very low temperature and seems to be sufficiently cold to condensed and freeze the steam of water. At air pressure, it has a boiling temperature of -196°C. Freezing the skin producing freeze or cold burns can be associated with direct contact.

(a)The value of Eo = 0.624

(b) delta G = -361.3KJ/mole

(c) Equilibrium constant K = 2.55*1063

An oxidation-reduction reaction, often known as a redox reaction, is a kind of chemical reaction in which two species exchange electrons. Any chemical process that modifies a molecule, atom, or ion's oxidation number by acquiring or losing an electron is known as an oxidation-reduction reaction.

The reactions are O3(g)+ H2O(l) +2e- --àO2(g)+2OH-(aq)   Eo= 1.246V,

Multiplying the equation by 3 gives

3O3(g)+ 3H2O(l) +6e-----à3O2+6OH--, Eo= 1.246V  (1)

ClO3-(aq)+3H2O(l) +6e- --àCl- + 6OH-   , Eo= 0.622V   (2)

Reversin the reaction gives  Cl- + 6OH- -àClO3 (aq)+ 3H2O(l) Eo=-0.622 (2A)

Eq. 1+Eq.2A gives

3O3 +3H2O+Cl- + 6OH- --à3O2+6OH- +ClO3-(aq)+3H2O(l), Eo= 1.246-0.622 =0.624Vo

3O3+ Cl- -----à3O2+ClO3- Eo=0.624V

deltaGo=-nFE, n= no of electrons, F= 96500 coulombs, E= 0.624V

deltaGo=-6*0.624*96500=-361296 Joules/mole= -361.3 KJ/mole

since deltaGo= -RTlnK

lnK= 361296/(8.314*298)= 146, K= 2.55*1063

Therefore Eo = 0.624 delta G = -361.3KJ/mole and equilibrium constant K = 2.55*1063

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\(2H_2 + O_2\rightarrow 2H_2O\)

From the balanced chemical equation, we know that 2 moles of H2 is required to react with 1 mole of O2:

⇒ \(\dfrac{n_{H_2}}{2}=\dfrac{n_{O_2}}{1}\)

We're also given that we have 0.37 moles of O2:

⇒ \(\dfrac{n_{H_2}}{2}=\dfrac{0.37}{1}\)

Solve for moles of H2:

⇒ \(n_{H_2}=\dfrac{0.37}{1}*2\\\\n_{H_2}=0.74\)

0.74 moles of hydrogen react with 0.37 moles of oxygen.

The reaction of -COOH and -NH₂ creates a peptide bond.

Peptide bond is defined as a type of amide type covalent chemical bond which is formed between the two simultaneous molecules of amino acid in such a way that carboxyl group of one molecule of amino acid get attached to the NH₂ group of another molecules of Amino acid.

Peptide bond is formed by the elimination of water molecules.

The hydroxyl group from the carboxyl and proton hydrogen cation from NH₂ group.

Thus, we concluded that the reaction of -COOH and -NH₂ creates a peptide bond by losing—OH from the -COOH and H+ from the -NH₂.

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The mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.

The mass of a substance can be calculated by using the stoichiometry approach.

The balanced equation of the complete combustion of hexane is as follows:

2C6H14(g) + 19O2(g) → 12CO2(g) + 14H2O(g)

48g of hexane to moles is calculated as:

48g ÷ 86g/mol = 0.56 mol

2 moles of hexane produces 12 moles of CO2

0.56 mol of hexane will produce 0.56 × 12/2 = 3.35 mol

Next, we convert 3.35 moles of CO2 to mass as follows:

3.35 moles × 44g/mol = 147.35g

Therefore, the mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.

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Answer:

question 6. answer is Metals are considered to be electropositive in nature due to their ability to donate electrons. Whereas non-metals are electronegative as they generally accept electrons

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

B) Al because the large difference between the third and forth ionization energies.

What is ionization energy?

Ionization energy (also called ionization potential) is the amount of energy required to remove an electron from an isolated atom or molecule in chemistry and physics. There is an ionization energy for each successively removed electron. However, the ionization energy associated with the removal of the first (most loosely held) electron is most commonly used.

The ionization energy of a chemical element, expressed in joules or electron volts, is usually measured in a discharge tube in which rapidly moving electrons produced by an electric current collide with gas atoms of the element, releasing one of them will be electronic.

B) Al because the large difference between the third and forth ionization energies.

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Answer:

The atomic size decreases with an increase in atomic number when we move from left to right.

Explanation: Hope it helps you:))))))

                      Have a great day.

A tiny filament becomes hot when you pass an electric current across it. The bulb lights because hot things give off light.

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Answer: 0.803

Explanation: i got it right on acellus goodluck yall

Heat is most accurately described as "the energy transferred between objects at different temperatures" (C). Until they reach thermal equilibrium, or the same temperature, heat is a type of energy that flows freely from a hotter to a colder item.

Heat can be transferred through conduction, convection, or radiation. The temperature differential between the items and the thermal conductivity of the materials involved determine how much heat is transported.

Temperature,  a measurement of the average kinetic energy of the particles in an item, is not the same as heat. Internal energy is the entire amount of energy held by an object's particles, which includes both their kinetic and potential energies.

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Answer: The density of the liquid is \(1.10g/cm^3\)

Explanation:

Density is defined as the mass contained per unit volume.

\(Density=\frac{mass}{Volume}\)

Given : Mass of the unknown liquid  = 938 grams

Volume of the unknown liquid = \(0.852L=852cm^3\)  \((1L=1000cm^3\)

Putting in the values we get:

\(Density=\frac{938g}{852cm^3}\)

\(Density=1.10g/cm^3\)

Thus the density of the liquid is \(1.10g/cm^3\) and the liquid is dimethyl sulfoxide.

Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.

An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.

However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.

Thus, the correct option is A.

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Exoplanets are usually gigantic, fireballs that are close to the sun. Therefore, the correct option is option B.

Any planet outside of our solar system is an exoplanet. The majority of exoplanets orbit other stars, while rogue planets—free-floating exoplanets that are unattached to any star—orbit the galactic centre.

The majority of the exoplanets found so far are in the Milky Way, which is a rather tiny area of our galaxy. The Kepler Space Telescope of NASA has revealed that the galaxy has more planets than stars. Exoplanets are usually gigantic, fireballs that are close to the sun.

Therefore, the correct option is option B.

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Explanation:

It is given that,

The electron in a hydrogen atom, originally in level n = 8, undergoes a transition to a lower level by emitting a photon of wavelength 3745 nm. It means that,

\(n_i=8\)

\(\lambda=3745\ nm\)

The amount of energy change during the transition is given by :

\(\Delta E=R_H[\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2}]\)

And

\(\dfrac{hc}{\lambda}=R_H[\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2}]\)

Plugging all the values we get :

\(\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{3745\times 10^{-9}}=2.179\times 10^{-18}[\dfrac{1}{n_f^2}-\dfrac{1}{8^2}]\\\\\dfrac{5.31\times 10^{-20}}{2.179\times 10^{-18}}=[\dfrac{1}{n_f^2}-\dfrac{1}{8^2}]\\\\0.0243=[\dfrac{1}{n_f^2}-\dfrac{1}{64}]\\\\0.0243+\dfrac{1}{64}=\dfrac{1}{n_f^2}\\\\0.039925=\dfrac{1}{n_f^2}\\\\n_f^2=25\\\\n_f=5\)

So, the final level of the electron is 5.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

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1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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Answer:

Energy cannot be converted from one form to another.

Answer:

false

Explanation:

Fossils fuels are actually polluting the atmosphere therefore, it can not be a clean-burning fuel.

Temperature is mostly responsible for the form of matter. For instance, when raising the temperature you're adding energy. This energy gives the individual molecules and atoms the ability to overcome the forces that hold them together. This can be seen when a solid turns into a liquid or a liquid turns into a gas. However, when you're lowering the temperature you're removing energy. The lack of energy results in less movement from the atoms. Gases condense into liquid because the atoms don't have enough energy to stay away from each other. Liquids solidify because the atoms don't have enough energy to slide past each other and they get stuck in place. So in conclusion, temperature determines how how much energy atoms have that allow them to move at different speeds which determines the state of matter.

Answer:

C. Matter

Explanation:

Using process of elimination

Rock and glass are non living things

Animals and plants Living things        

these cancel each other out I excluded wood be because this depends on whether or not the tree was harvested.

While atoms are in every thing, Matter is in any thing thing that takes up space whether it be air or a rock making it the best answer.

Answer:

D e

Explanation:

Answer:

Below

Explanation:

Number of seconds in one year

  3600 s/hr * 24hr/day * 365.25 day/yr = 31 557 600 s/yr

1.10 s / 31 557 600 s/yr = 3.49 x 10^-8  yr

Answer:

1.90 M

Explanation:

Step 1: Given data

Step 2: Calculate the moles corresponding to 181 g of MgCl₂

The molar mass of MgCl₂ is 95.21 g/mol.

181 g × 1 mol/95.21 g = 1.90 mol

Step 3: Calculate the molarity of the solution

Molarity is equal to the moles of solute divided by the liters of solution.

M = 1.90 mol/1.00 L = 1.90 M

The volume of methanol is 54.72 ml, m/m% of solution is 29% and mass of NaCl present is 73.76g

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

1. v/v% = 17.1 %

This means that 17.1 ml of methanol is present in 100 ml of water.

so, 320 ml of water has 0.171 × 320 = 54.72 ml

2. Mass of NaCl = 8.5 lbs

Mass of water = 29.3 lbs

mass of NaCl in 1 lbs = 8.5 / 29.3 = 0.29 lbs

m/m% = 29%

3. Volume of NaCl = 194 ml

Concentration of NaCl = 6.5 M

Moles of NaCl = 0.194 × 6.5 = 1.261 moles

Mass of NaCl = 1.261 × 58.5 = 73.76g

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Since this compound has Aluminum and Hydroxide in its composition, when we name it, we will need to use the cation (positively charged ion) before the anion (negatively charged ion), therefore the name will be:

Aluminum hydroxide

77.78 kJ of energy is released when 1 mol of glucose is burned, 2802.5 kJ of energy is released.

A mole is defined as 6.02214076 ×\(10^{23}\) of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Calculate the moles of 5.00g of glucose.

Given mass = 5.00g

The molar mass of glucose = 180.156 g/mol

\(Moles = \frac{mass}{molar \;mass}\)

\(Moles = \frac{5.00g}{180.156 g/mol}\)

Moles =0.02775372455

The quantity of energy released to a person by eating 5.00g of glucose in a candy.

0.02775372455 x 2802.5 kJ

77.77981305 kJ =77.78 kJ

Hence, 777.78 kJ of energy is released.

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