A gas sample having an initial temperature of 80℃ and an initial volume of 135 l is cooled to a final temperature of 12℃ and a final volume of 103 l. if the final pressure of the gas is 1.50 atm, what was the initial pressure?

Over time, the atomic size shrinks because as number of shells stays constant but more electrons are added, increasing the nuclear charge.

The distance between an atom's central nucleus and also its outermost shell is known just like its atomic size. The smallest distance here between atom's nucleus and its outermost shell is known as the atomic radius within basic chemistry.

The orbitals from higher primary energy levels have greater sizes than the orbitals form lower principal energy levels. Atomic radius grows down a group as a result of the stronger impact of the major energy levels outweighing a increase overall nuclear charge.

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The volume of 5.0 grams of gasoline which has a density of 0.70 g/ml is 7.14m3

Petroleum-derived clear flammable liquid known as gasoline or petrol is the main fuel for the majority of spark-ignited internal combustion engines. It mostly comprises of organic compounds made from petroleum fractional distillation that have been improved with various additions.

Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume.

Acc. to the given data

mass of gasoline = 5.0 g

density of gasoline=0.70g/ml

now to find the volume we use the following formula

V=m/p

V= 5.0/0.70

V=7.14m3

Hence, the volume of 5.0 grams of gasoline which has a density of 0.70 g/ml is 7.14m3

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Explanation:

99 is not a prime number because it can be multiplied by itself and by other numbers

99*1

9*11

Answer:

A prime number is a number that can only be divisible by ±itself and ±1

but 99 can  be divisible by  ±3; ±11 => 99 isnt a prime number

Explanation:

When synthesizing fuming nitric acid from concentrated sulfuric acid and potassium nitrate, the steps that can be made to reduce nitrogen dioxide are:

The formation of fuming nitric acid can be performed by the reaction of concentrated sulfuric acid and potassium nitrate.

The equation of the reaction is given below:

The formation of nitrogen dioxide occurs as a result of the decomposition of nitric acid.

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Answer:

(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.

(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.

Here:

- C is the redemption amount,

- g is the modified coupon rate per period,

- j is the yield rate per period, and

- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.

This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).

The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.

(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.

Explanation:

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

Sex

Explanation:

Answer:

Its the thin lining around the cell the moniters what gets in and out of the cell.

Explanation:

Answer:

Size and Temperature or E & B

Explanation:

Answer:

it is E and b I hope this helps you

They are very energetic.

The particles are in continual straight-line motion. They are much farther apart and move freely of each other.

The overall reaction for the oxidation of SO2 by O2 to give SO3 is:

SO2(g) + O2(g) ⟶ 2SO3(g)

The two given reactions are:

NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)

2NO(g) + O2(g) ⟶ 2NO2(g)

Adding these reactions, we get:

NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)

2NO(g) + O2(g) ⟶ 2NO2(g)

2NO2(g) + SO2(g) + O2(g) ⟶ 2NO(g) + 2SO3(g)

Therefore, the overall reaction for the oxidation of SO2 by O2 to give SO3 is:

SO2(g) + O2(g) ⟶ 2SO3(g)

where the catalyst NO2 is not explicitly shown. All the reactants and products are in the gas phase.

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Answer: Why exacly am i a rat

Explanation:

,....

but thanks

Answer:

what!!!??????

The addition of salt to solid ice affect the transition from liquid to gas by increasing the boiling point of water.

When salt is added in ice, it lower the freezing point of the ice. So, if ice added into the solid ice it does not let it to freeze rather than the temperature of water when salt is added into water.

There are some properties of solutions on which vapour pressure depends. These are,

(i) Depression of freezing point of the solvent.

(ii) Relative lowering of the vapour pressure of the solvent

(iii) Elevation of the boiling point of the solvent

(iv) Osmotic pressure

When a non-volatile solute such as salt is added into water, the pure solvent is higher than that of the resulting solution. Thus, a large amount of heat is required for water to boil.

In the same way, non-volatile solute lower the freezing point of water.

Thus, the addition of salt to solid ice affect the boiling transition from liquid to gas by increasing the boiling point of water.

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Answer:

c

Explanation:

Jackson noticed that the music from his cell phone sounds louder when laid on his desk than when he held it up in the air. Sound waves move faster through solids because the molecules are closely packed together. Therefore, option D is correct.

When energy moves through a medium and propagates away from the sound source, it creates a pattern of disruption known as a sound wave. Pressure waves are generated by the vibration of objects and are known as sound waves.

When energy forces air molecules to shift in and out of one another, sound is produced. The sound's amplitude increases as the particles approach closer or farther apart. A sound's volume and intensity are determined by its amplitude. The sound gets louder and more intense the larger the amplitude.

The results of the testing demonstrated that Solid was the best medium out of the three for sound to travel loudest. The liquid medium came in second. The least effective medium was air.

Thus, option D is correct.

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Answer:

2pounds

Explanation:

Given parameters:

Weight of Pedro's book  = \(\frac{19}{4}\) pounds

Weight of Blanca's book  = \(\frac{17}{7}\) pounds

Unknown:

How much more does Pedro's book weigh more than Bianca's book ?

Solution:

To Solve this problem, let us convert the fractions to decimal;

   Weight of Pedro's book  = 4.75 pounds

   Weight of Bianca's book  = 2.43 pounds

Differences  = 4.75pounds - 2.43 pounds

                     = 2.32 pounds

Estimating gives 2pounds

2.70 grammes of N₂ must dissolve in 30.5 litres of water at 25 degrees Celsius and 4.46 atm of pressure.

The solubility of N₂ in water depends on the temperature and pressure. To determine the volume of water needed to dissolve 2.70 grams of N₂ at 25 °C and 4.46 atm, we need to use the Henry's law equation, which relates the solubility of a gas in a liquid to its partial pressure:

C = kH x P

where C is the concentration of the gas in the liquid, kH is the Henry's law constant for the gas, and P is the partial pressure of the gas above the liquid.

The Henry's law constant for N₂ in water at 25 °C is 7.07 x 10⁻⁴ M/atm.

First, we need to convert the mass of N₂ to moles using its molar mass:

moles of N₂ = 2.70 g / 28.02 g/mol = 0.0963 moles

Next, we can use Henry's law equation to find the concentration of N₂ in water:

C = kH x P = (7.07 x 10⁻⁴ M/atm) x (4.46 atm) = 3.16 x 10⁻³ M

Finally, we can use the definition of concentration (C = moles of solute / volume of solvent) to solve for the volume of water needed:

Volume of water = moles of solute / concentration = 0.0963 moles / 3.16 x 10⁻³ M = 30.5 L

Therefore, 30.5 liters of water are needed to dissolve 2.70 grams of N₂ at 25 °C under a pressure of 4.46 atm.

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AB is a covalent compound with a polar covalent bond between A and B. AC is an ionic compound with an ionic bond between A (cation) and C (anion). BC is a covalent compound with a polar covalent bond between B and C.

AB is likely to be a covalent compound, with a polar covalent bond between A and B. This is because the electronegativity difference between A and B (2.1) is between 0.5 and 2.0, which is the range for polar covalent bonds.

AC is likely to be an ionic compound, with an ionic bond between A and C. This is because the electronegativity difference between A and C (2.6) is greater than 2.0, which is the range for ionic bonds. In this compound, A is the cation and C is the anion.

BC is likely to be a covalent compound, with a polar covalent bond between B and C. This is because the electronegativity difference between B and C (0.5) is between 0.5 and 2.0, which is the range for polar covalent bonds.

The classification of a substance as covalent or ionic is not always clear-cut and depends on the difference in electronegativity between the atoms involved in the bonding. There are cases where the electronegativity difference is borderline and the bond can be considered partially ionic and partially covalent, giving rise to intermediate bond types such as polar covalent or coordinate covalent bonds.

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The compounds that would end in  "-ide" are;

1) Na₂S

2) CO2

3) AIP

We know that chemical compounds can be identified by the name of the compound. Also, the name of the compound reflects the kind of species that we have in the compound. The task that we have here is that we need to find out the three compounds that would have the ending  "-ide" in their names.

We have to know that the names of chemical compounds are often chosen by the International Union of Pure and Applied Chemistry (IUPAC). These rules are revised from time to time and are thus updated in order to help us to identify compounds.

It is important to note that the compounds whose names are most likely to end in the term  "-ide" would be the binary compounds that are composed of the metals and the non metals.

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Oxygen always has an oxidation number of -2 when bonded in a compound. Here -2 represents that oxygen atom has gained two electrons.

The Oxidation Number can be defined as the number that is allocated to elements in a chemical combination. The oxidation number is basically the count of electrons that atoms in a molecule can share, lose or gain while forming chemical bonds with other atoms of a different element.

A positive oxidation number shows loss of electrons, and a negative oxidation number shows gain of electrons.

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Answer:

true

Explanation:

Answer:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.

In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by chemical means

Answer:

box a=240, box b= 6, box c=50

Explanation:

The bonding is nature's way of lowering the energy of the system to attain stability. The covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the transfer of electrons from one atom to another. The correct option is A.

The attractive force that holds the constituent atoms or ions of a molecular species together is called the bond. An ionic bond is formed by the complete transfer of electrons from one atom to another. This transfer results in the formation of positive and negative ions.

In the formation of a covalent bond, there occurs a sharing of an electron pair between two atoms.

Thus the correct option is A.

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The amount of carbon flux in the atmosphere will be 3.3 GtC/yr

The carbon flux in the atmosphere can be calculated by:

1. Removing the amount of carbon that leaves the atmosphere from the amount that enters the atmosphere.

2. Adding the amount of carbon released by fossil fuel burning.

Thus,

Carbon flux = 211.6 - 213.8 + 5.5 = 3.3 GtC/yr

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The specific heat of the metallic element rhodium is 0. 240 j/g-k at 25°c. If 586 j of heat is added to an 80. 0 g block of rhodium metal that is initially at 25. 0°c,  the expected final temperature of the block 55.5 °C.

As we know

Q= mcΔT

Given values:

M= 80 g

C = 0.240 J/g K

Q= 586 J

To find final temperature

ΔT = 586 / 80 x 0.240 = 30.5 °C

Final temperature =25 + 30.5 = 55.5 °C

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Answer:

Blue dye spreads out quicker

Explanation:

This is because the dye gets spread out by water molecules. Warm water has faster moving water molecules than cold water.

Maximum number of electrons in nth energy level

\(\\ \sf\longmapsto 2n^2\)

Now

Max electrons

\(\\ \sf\longmapsto 2(1)^2\)

\(\\ \sf\longmapsto 2e^-\)