please help this is due today

If the temperature is raised to 402 K, the pressure (in atm) of this given sample of gas will be 4.5.

Given,

Pressure P1 = 3.4 atm

Temperature T1 = 300 K

       ⇒            T2 = 402 K

   ⇒                P2 = ?

    ⇒          P1/T1 = P2/T2

 ⇒         3.4/300 = P2/402

    ⇒              P2 = 4.5

   ⇒     Pressure = 4.5 atm

An atmosphere (atm) is a measuring unit that corresponds to the average air sea level pressure at 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere consists of 1,013 millibars of pressure, or 760 millimetres (29.92 inches) of mercury.

Pressure is defined as the force exerted by one material on another per unit area. The force also that gas exerts on the container limits is defined as gas pressure. Gas molecules travel at random over the specified volume. They clash with the surface as well as each other during this movement.

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Answer:

The effect of adding a solute to a solvent has the opposite effect on the freezing point of a solution as it does on the boiling point. A solution will have a lower freezing point than a pure solvent. The freezing point is the temperature at which the liquid changes to a solid.

Explanation:

Hope this helps :3

The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.

The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.

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Ni(OH)₂ is base but this is not strong base this is very weak base and this cannot gives OH⁻ after dissolving in H₂​​​O . this is only dissolve in acidic solution.

A solution is said to be acidic if it contains more positively charged hydrogen ions (H⁺) than negatively charged hydroxide ions (OH⁻). Lemon juice and vinegar are typical examples of acids. The amount of OH ions is greater in bases. Baking soda and regular ammonia are common examples.

Acidic substances can typically be distinguished by their sour flavor. A basic definition of an acid is a molecule that can donate an H⁺ ion and can continue to be energetically favorable even after losing H⁺. Blue litmus paper has a reputation for turning red when exposed to acids. Bases, on the other hand, are distinguished by their bitter flavor and slick consistency.

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The component missing from the process of photosynthesis is carbon dioxide. Carbon dioxide is an essential component of photosynthesis as it is used by plants to create glucose, which is the primary energy source for plants.

Carbon dioxide (CO2) is a colorless, odorless gas that is produced when carbon-containing compounds are burned. It is one of the most abundant trace gases that make up the Earth’s atmosphere. Carbon dioxide is important in the Earth’s natural cycle of life as plants use it to produce food through photosynthesis, while animals and humans exhale it as a waste product. In the atmosphere, carbon dioxide acts as a greenhouse gas and helps regulate the Earth’s temperature.

Carbon dioxide is taken in by the leaves of the plant and then combined with water and energy from sunlight to form glucose. Without carbon dioxide, photosynthesis would not be possible.

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Answer: The Correct Answer is A. Sunlight

Carbon Dioxide + Water + Sunlight → Glucose + Oxygen

Explanation: I took the test and got it right.

Have a Great Day.

Answer:

The temperature will be 189.70 K.

Explanation:

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

In this case:

Replacing:

2 atm* 35 L= 4.5 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * T

Solving:

[tex]T=\frac{2 atm* 35 L}{4.5 moles* 0.082\frac{atm*L}{mol*K} }[/tex]

T= 189.70 K

The temperature will be 189.70 K.

Answer:

8.3 × 10⁴kg

Explanation:

Solution in the diagram

Answer:

the answer is true

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If we need 18.9 grams of HCl for a reaction, and we have a 1.5 M solution of HCl, the mL of this solution should we use is 345.3 mL.

Given that :

mass of the HCl =  18.9 grams.

molar mass of the HCl = 36.45 g/mol

moles of the HCl = mass / molar mass

                             = 18.9 / 36.45

                             = 0.518 mol

the molarity of the HCl = 1.5 M

The molarity is given as:

molarity = moles / volumes

volume in L = moles / molarity

                    = 0.518 / 1.5

                    = 0.3453 L

                    = 345.3 mL

Thus, the volume is 345.3 mL.

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Thus, Option (C) Glucose has a maximum of 72 C-atoms per gram. The components of fossil fuels are decaying plants and animals.

These fuels may be burned to provide energy and can be found in the crust of the Earth. An example of a fossil fuel is coal, as well as oil and natural gas. Due to the hydrocarbons and other carbon-based compounds they contain, fossil fuels are valuable as energy sources. Any of a class of organic molecules made solely of carbon and hydrogen are known as hydrocarbons. The hydrogen atoms adhere to the carbon atoms, which serve as the "skeleton" or framework. Because they were generated from the petrified, buried remains of plants and animals that once lived millions of years ago, coal, crude oil, and natural gas are all referred to as fossil fuels.

The complete question is- Petroleum is a fossil fuel containing many different carbon compounds. If the carbon atoms in petroleum have been in the ground for 875 million years, what fraction of the initial 14C atoms is still there?

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All of the elements in group 18 are relatively un-reactive whereas those in group 17 are very reactive because group 18 elements have complete outer shell and group 17 needs only one electron to complete octet.

In the periodic table , the group 18 elements are called as the noble gases. the group 18 elements have the complete octet that mean the complete valence shell and they are stable due to which they are un reactive and also called as inert gases.

In the group 17 , the elements are called as halogens. the group 17 elements have the incomplete outer shell and they only need one electron to complete their octet due to which they are very reactive.

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Answer:

If a reaction takes place using all oxygen available and leaving hydrogen available, then oxygen is the limiting reactant.

Explanation:

The reaction used up all the oxygen and left over some hydrogen, so oxygen is the liting reactant.

Answer:

answer is D. safety shower, in case a chemical is spilled on the student’s body on edge 2020

Explanation:

have a great day peeps :)

It is important for student's to know the location of safety shower, in case a chemical is spilled on the student’s body which can be avoided by wearing proper personal protective equipments.

Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.

It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.

It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.

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Answer:

powdered sugar

Explanation:

The higher is the exposed area of sugar, the faster is the dissolution process. Thus, to choose between the different types of sugar, we have to look at the volume occupied by the sugar.

In sugar cubes, the particles of sugar as compacted in a cube, so the particles inside the cube are not exposed to the solvent (water). So, sugar cubes have the slowest dissolution process. Then, in granulated sugar, the particles have more area exposed, so this type of sugar will dissolve faster than sugar cubes. Finally, powdered sugar is composed of tiny particles with more are exposed, so powdered sugar has the fastest dissolution process.

Therefore, powdered sugar will dissolve the fastest.

Explanation:

conduction because it has succession

The mass of 4.86 × 10²⁴ Au atoms is equal to  1589.6 g.

Avogadro’s number can be used to express the number of entities such as molecules, atoms, ions, electrons, or protons in one mole of any substance.

The value of Avogadro’s constant is equal to 6.022 × 10²³ per mole.

Given, the number of atoms of the Au =  4.86 × 10²⁴

The atomic mass of the Au = 197 g/mol

So 6.022 × 10²³ atoms of Au have mass = 197 g

Then 4.86 × 10²⁴ Au atoms will have mass =  1589.6 g

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Answer:

can you show us question 3 pls

Explanation:

Four water molecules are created for every ten oxygen atoms that are reacting.

A three carbon alkane, propane has the chemical formula C3H8. At room temperature and pressure, it is a gas, but it can be compressed into a liquid for transportation.

Its primary applications include home and water heating, food preparation and storage, clothing drying, and the powering of industrial and farm machinery. The production of plastics and other chemicals in the chemical sector also uses propane as a raw ingredient.

Cons of propane heating

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Compared to safety standards, that would be too little chlorine:

10,000 gallons is five times as much water as 2,000.

Therefore, Park's pool needs five times as much chlorine as is required for 2,000 gallons to meet safety regulations.

5 times 3 pills of chlorine equals 15 tablets. For Mark to meet safety standards, 15 chlorine tablets would be required. Use one three-inch tablet for every 10,000 gallons of pool water rather than stuffing your chlorinator or floater to the brim with tablets. This quantity of pills should be sufficient to maintain a good chlorine level if you shock your water once a week.

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The plausible electron dot structures of I₂, OF₂, H₂S, NI₃ substances are attached below.

Lewis dot structures, also known as electron dot structures, are diagrams that show how atoms in a molecule are chemically bonded to one another. They also show how many lone pairs there are in total among all the atoms that make up the molecule.

An electron configuration writing guide. The shell number (n) comes first in the symbols used to represent the electron configuration, followed by the type of orbital and, finally, a superscript that represents the number of electrons in the orbital. Examples include As you can see from the periodic table, oxygen has 8 electrons.

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The composition of each compound as the mass percent of its elements is as follows:

Concentration is expressed as mass percent. Additionally, the ingredients in a particular mixture are described. Solution composition can be understood in terms of mass percent. It indicates the mass of solute present in a solution of a given mass. The amount of solute is expressed in mass or moles.

Mass Percent = (Component Mass ÷ Total Mass) x 100% or

(mass of solute ÷ mass of solution) x 100%

a. Sucrose (C₁₂H₂₂O₁₁) with molecular mass of 342.296 u composed of:

Carbon: (12 x 12.01) / 342.296 = 42.18%

Hydrogen: (22 x 1.01) / 342.296 = 6.44%

Oxygen: (11 x 16) / 342.296 = 51.38%

b. Aluminum sulfate (Al₂(SO₄)₃) with molecular mass of 342.14 u is composed of:

Aluminum: (2 x 26.98) / 342.14 = 3.99%

Sulfur: (3 x 32.06) / 342.14 = 4.57%

Oxygen: (18 x 16) / 342.14 = 87.44%

c. Magnetite (Fe₃O₄) with molecular mass of 231.534 u is composed of:

Iron: (3 x 55.85) / 231.534 = 71.83%

Oxygen: (4 x 16) / 231.534 = 28.17%

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The process of dissolution of KBr in water occurs because the final solution has a lower energy state than the two components separately.

What do you mean by endothermic?

Endothermic reactions are chemical reactions that absorb energy from their surroundings in order to proceed. This energy is usually in the form of heat and is absorbed from the surroundings in order to drive the reaction forward.

Even though the dissolution process is endothermic, it occurs because the enthalpy of solution is less than the sum of the enthalpies of the two components separately. The enthalpy of solution is the energy required to break the strong ionic bonds between the KBr molecules, allowing them to dissolve into the solution. The energy released from the formation of new hydrogen bonds between the KBr molecules and the water molecules is greater than the energy needed to break the ionic bonds, resulting in a net release of energy. This release of energy causes the overall process to be exothermic, even though the dissolution of KBr into water is endothermic.

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For average speed, we divide the total distance covered by the total time taken.

After doing that, you will see that Jane has the lowest average speed.

Answer:

O Neutron

Explanation:

Answer:

the anwser is

At room temperature I₂(s) is a molecular solid. the correct explanation is : (C)It is not a good conductor of electricity because its valence electrons are localize in bonding and nonbonding pairs.

The Iodine ,  I₂ is the example of the molecular solid. the iodine is the good conductor of the electricity due to the valence electrons that are localized in the bonding pairs and the non bonding pairs. the iodine is the element in the periodic table with the atomic number 53. the iodine is the non metallic solid at the room temperature.

The iodine exists as the diatomic form. the each iodine molecules present as the two iodine as  I₂ . this is the reason it is called as molecular solid.

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The diagrams of the arrangement of the electrons in calcium and magnesium have been shown in the image attached to this answer. There are two electrons in the valence shell of calcium.

We know that the electrons are the subatomic particles that we can be able to see in the shells of the atom. It is important that we ought to know that the electrons are the particles that are known to be responsible for the reactivity of the atom.

The number of the electrons that we can find in the atom would depend on the number of the protons that we have in the nucleus of the atom and this is because for the atom to be electrically neutral then we would have to have the same number of electrons and protons being in the atom as we know.

It is clear that calcium is a member of group two of the periodic table and that magnesium is also a member of group two of the periodic table.

The structures for calcium would have Ca and two dots while that of magnesium would have Mg and two dots.

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Answer: 2Na+2H2O------>2NaOH+H2

b) From the equation two moles of sodium gave one mole of hydrogen.

At stp the volume of hydrogen is 22400cm3.

The molar mass of sodium is 23

So we have

2molesNa--->1moleH2

5.76moles--->? mole H2

Meaning

2(23)Na----> 22400cm3 ofH2

5.67Na---->?H2

22400×5.67÷ 2(23)

127008÷46=2761.04cm3

Sorry I can't do the last one.

The solid does not consist of that particle which can not be compressed and have a definite shape.

One of matter's four basic states is solid. A solid's molecules are tightly packed and carry the minimum amount of kinetic energy. A solid's structural stiffness and resistance to a force applied to its surface define it. Although they are locked in fixed locations, they do vibrate. Solids have a defined structure and volume and cannot flow since the particles do not move. Solids are difficult to crush because the particles are often so close together.

A particle is a small, localized object to which numerous physical or chemical qualities, like volume, density, or mass, can be assigned.

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Answer:

Calcium nitride (Ca3N2)

148.25 g/mol is the molar mass