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Answer:

This is what we're given:

P (pressure), which is 1.95 atm

V(volume), which is 11.30 L.

n(number of moles), which is 0.554 moles of helium gas.

We have to find T, or temperature. To do this, we'll need to use the Ideal Gas Law, which is:

[tex]PV = nRT[/tex]

Rearranging this equation to get temperature on one side, we get:\\ [tex]T =\frac{PV}{nR}\\ \\

Pressure \: is \: in \: atm \: and \\ volume \: is \: in \: L . \: This \: tells \\ \: us \: that \: we'll \: need \: to \: \\ use \: the \: value \: of \: 0.08206 L atm/K \: mol \: for \: R \: the \: ideal \: gas \: constant.\\ \\ Plugging in all of the values, we can solve for temperature:

[tex]T =\frac{PV}{nR}\\ \\

T = (1.95 atm × 12.30 L) ÷

(0.654 mol × 0.0820575LatmK−1)

mol

[tex]T =\frac{PV}{nR} \\ \\

T =

\frac{ (1.95 atm × 12.30 L)}{(0.654 mol × 0.0820575LatmK−1)} [/tex]

[tex]T = 447 K [/tex]

Boyle’s Law (PV law)

a. Volume of a GIVEN MASS OF GAS (mass is fixed) is inversely proportional to the Absolute pressure of the gas at constant Temperature.

b. Absolute pressure means pressure that is measured relative to Vacuum. Vacuum = 0 pressure. Thus, absolute pressure is measured relative to absolute 0.

c. Another way : PV = Constant. Thus, if you measure the Pressure and Volume at 3 different times, then P1 V1 = P2 V2 = P3 V3. In order to keep the product as a constant, whenever Pressure increases, the Volume will decrease.

Charle’s Law (VT Law)

a. Volume of a GIVEN MASS OF GAS (mass is fixed) is directly proportional to the Absolute Temperature at constant pressure.

b. When you measure the Temperature of a body on a scale in which 0 corresponds to Absolute 0, then the measured temperature is Absolute Temperature. Put simply, this refers to the Kelvin scale.

c. Absolute 0 is the temperature at which objects are at their lowest possible energy (Since Temperature is a measurement of the Kinetic energy of the atoms).

Gay Lussac Law (PT Law)

a. Pressure of a GIVEN AMOUNT OF MASS (mass is fixed) at constant volume is directly proportional to the absolute Temperature (that is, Kelvin Temperature).

b. Another way : P / T = Constant. P1 / T1 = P2 / T2 = P3 / T3.

Avogadro’s law (Vn law)

a. All the above laws were talking about relationships at fixed mass. So we needed a law which would relate mass with other quantities. This is Avogadro’s law.

b. It is a very straight forward law, if the amount of gas in a Container increases (that is, if the amount of matter increases), then the Volume of the gas increases which is very straight forward.

c. Volume is directly proportional to n (number of moles) or V/n = Constant.

Considering the Ideal Gas Law, at 485.05 °K 0.554 moles of helium gas will occupy 11.30 liters at 1.95 atmospheres.

On the other side, the 4 gas laws are Gay Lussac's law, Boyle's law, Charles' Law and Avogadro's law.

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:

In this case, you know:

Replacing in the Ideal Gas Law:

1.95 atm×11.30 L = 0.554 moles× 0.082 [tex]\frac{atm L}{mol K}[/tex]× T

Solving:

T= (1.95 atm×11.30 L) ÷ (0.554 moles× 0.082 [tex]\frac{atm L}{mol K}[/tex])  

T= 485.05 K

Finally, at 485.05 °K 0.554 moles of helium gas will occupy 11.30 liters at 1.95 atmospheres.

Gay Lussac's law states that the pressure of the gas is directly proportional to its temperature: when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, gas pressure decreases.

Boyle's law says that volume is inversely proportional to pressure: if pressure increases, volume decreases; while if the pressure decreases, the volume increases.

Charles' Law that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases; while if the temperature of the gas decreases, the volume decreases.

Avogadro's law states that the volume is directly proportional to the amount of gas: if the amount of gas increases, the volume will increase, while if the amount of gas decreases, the volume will decrease.

In summary, the 4 gas laws are Gay Lussac's law, Boyle's law, Charles' Law and Avogadro's law.

Learn more about the gas laws:

Answer:

              Lithium-7

Explanation:

                    By carefully inspecting the diagram we can see three different sub-particles.

                   1)  Electrons (-vely charged, outside the nucleus)

                   2) Protons (+vely charged, Inside nucleus)

                   3) Neutrons (uncharged, Inside nucleus)

Mass Number:

                       Mass number is the number of protons and neutrons present in the nucleus of an atom.

                    Therefore, in our problem there are 4 neutrons and 3 protons.

So, the mass number is 7.

Atomic Number:

                      Atomic number is the number of protons present in the nucleus. This number shows the identity of an atom. If you go through the periodic table you will find that the atomic number 3 is for Lithium.

Result:

          Lithium-7

Answer:Freshwater marshes are the most diverse

Explanation:

Answer:

freshwater

i got it right on my test

Hope This Helps :D

Answer:

Melting- The process by which a substance changes from its solid state to its liquid state.

evaporation- turning liquid into vapor.

Freezing- The process by which a substance changes from its liquid state into its solid state.

condensation- water which collects as droplets on a cold surface when humid air is in contact with it

sublimation- a solid deposit of a substance which has sublimed.

Explanation:

Answer:

The linking together of silica tetrahedra into chains that do not easily move

Explanation:

Answer:

arranged and bonded

Explanation:

silicate minerals are subdivided into six groups based on the way silica tetrahedra are arranged and bonded

The concentration of the reactants equal the concentrations of the product.

In the chemical equilibrium, the system has no observable changes. It is the state of the equal concentration state of the reactant and the products.

It is the dynamic state of the reaction in which the concentration of the chemical reactants and the products of the reaction are in a constant state and the amount does not change.

The chemical reaction does not move forward or backwards unless a disturbing or stressed condition is given to the system.

Therefore, option d. the concentration of the reactants and the products are equal.

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Based on factors affecting bond length, the rank from shortest to longest bond length is SO42-, SO32- SO2.

The bond length of a bond is defined as the average distance between nuclei of two bonded atoms in a molecule.

The bond length is determined by the number of bonded electrons also known as bond order.

The higher the number of bonded electrons, the shorter the bond length and vice versa.

SO2 has the least number of bonded electrons, followed by S032- and then SO42-.

Therefore, the rank from shortest to longest bond length is SO42-, SO32- SO2.

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Answer:

the molar mass of mgo is 40.3

When soap is added then the paper clip will fall as soap is a surfactant and decreases the surface pressure. The surface strain of water holds the paper.

The paper clip is lighter in weight and floats on the water surface as the density and mass play a major role in floatation. Any addition of substances like soap will lead the clip to fall or sink.

The addition of the soap lessens the pressure of the water surface as it is a surfactant and will affect the surface strain of water.

Therefore,  when soap is added,  paper clips will fall.

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Answer:

1-The paperclip falls through the water to the bottom of the dish.

2-The soap acts as a surfactant.

4-The soap decreases the surface tension of the water.

Explanation:

edge 2022 :)

Considering the reaction stoichiometry, the mass of H₂O that is produced when 11.9 moles of HNO₃ react is 107.1 grams.

The balanced reaction is:

3 Cu + 8 HNO₃ → 3 Cu(NO₃)₂ + 2 NO + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:  

The molar mass of the compounds present in the reaction is:

Then, by reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of mass of each compound participate in the reaction:  

Cu: 3 moles ×63.54 g/mole= 190.62 grams

HNO₃: 8 moles ×63 g/mole= 504 grams

Cu(NO₃)₂: 3 moles ×187.54 g/mole= 562.62 grams

NO: 2 moles ×30 g/mole= 60 grams

H₂O: 4 moles ×18 g/mole= 72 grams

It is possible to determine the the amount of mass of H₂O produced by a rule of three: if by stoichiometry 8 moles of HNO₃ produce 72 grams of H₂O, if 11.9 moles of HNO₃ react how much mass of H₂O will be formed?

[tex]mass of H_{2}O=\frac{11.9 moles of HNO_{3} x72 grams of H_{2}O}{8 moles of HNO_{3}}[/tex]

mass of H₂O= 107.1 grams

In summary, the mass of H₂O that is produced when 11.9 moles of HNO₃ react is 107.1 grams.

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A combination of two or more elements or compound combine each other is called as molecules.

.

.

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Gud mrng sis

Answer:c

Explanation:

[tex]\\ \tt\hookrightarrow 4NH_3+3O_2\longrightarrow 2NO+6H_2O[/tex]

#1

We can solve through ammonia or oxygen .Lets go through ammonia

Moles of Ammonia

[tex]\\ \tt\hookrightarrow \dfrac{12}{17}=0.7mol[/tex]

Moles of NO

[tex]\\ \tt\hookrightarrow 0.7(0.5)=0.35mol[/tex]

Mass of NO

#2

NH_3 is excess reagent and O_2 is limiting reagent .

#3

We need ∆n

Answer:

A

Explanation:

A solid that dissolves in water produce alkaline solutions

ex. sodium reacts with water to form sodium hydroxide – caustic soda

Answer:

Three formula units, Two Ammonium radical and Sulphate radical

Explanation:

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The error source is metals were heated to 100 degrees celsius, they were cooled before water addition, a thermometer was not submerged properly, and the calorimeter was not sealed properly.

To raise the temperature by one degree of the one gram substance the heat required is called specific heat.  The heat given by the system gets absorbed by the surrounding environment.

As the calorimeter was not sealed properly the heat from the system got escaped to the outer environment and the metals of the experiment were not heated till the specific temperature required.

The heat got transferred from the hotter to the cooler environment even before water addition. While taking the readings for the experiment the thermometer was not completely dipped and the values of the specific heat differed.

Therefore, errors during the measuring and estimation vary the calculation.

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Answer:

1) synthesis MgI2

2) double replacement CuS + (HCl)2

3) double replacement, not sure ab the formula sorry

Answer:

no its moist

Explanation:

Answer:

I say yes but my friends tell me that it's not because it makes things wet henceforth is not able to be "wet"

Explanation:

it is definitely wet though.

Hope this helps! :)

Answer:

c

Explanation:

4fe and 6o2 in both sides of C but in other their isnot proper balancing

Answer:

C

4fe4

6O6 so iron and oxygen is balanced

Answer:

Explanation:

a mineral would have other elemts in its mixture where as a rock would be more simple, the mineral if were to have a metalic element in it would attract magnets to it making it magnetic

Answer:

Because its molecules aren't in direct contact with eachother.

[tex]\huge\fbox{Answer ☘}[/tex]

Chemists use the mole unit to represent 6.022 × 10 23 things, whether the things are atoms of elements or molecules of compounds. This number, called Avogadro's number, is important because this number of atoms or molecules has the same mass in grams as one atom or molecule has in atomic mass units.

hope helpful~

Answer:

Nitrogen = 17.07%

Explanation:

We are asked to calculate the percentage by mass of nitrogen in Ca(NO3)2.

The molar mass of calcium nitrate is 164,088 g/mol.

In this 164.088 g/mol there are 2 nitrogen atoms.

Molar mass of nitrogen = 14,0067 g/mol

% Nitrogen = molar mass of N/total molar mass of the compound

% Nitrogen =[(2 x 14.0067)/164.088]*100

% Nitrogen = 17.07%

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Answer:

We need the picture to answer the question

Explanation:

but i did do this test and number 4 was biotic and number 5 was abotic hope this helped

The movement of the ocean and sea waves in a direction is called the ocean currents. Ocean currents can bring cold water, which cools the land and atmosphere.

Ocean currents are the movement of the oceanic waves by the influence of the gravitational forces that can affect the atmosphere and the climate of the region.

Oceanic currents are capable of carrying cold water from polar areas to the regions of the equator resulting in a cooling atmosphere over the geosphere.

Therefore, option B. oceanic currents carry colder air to the warmer regions.

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Answer:

B

Explanation: