The solar system is the collective name for the sun, eight planets, and their moons. The
blank is the center of the solar system, and everything orbits around it.

Answer: 4.30 moles of CO2

Explanation:

4.30 moles of carbon dioxide gas occupy a volume of 93.3 L at 162 kPa and a temperature of 100°C.

Answer:

closely related

Explanation:

If ammonia is added to the system, the reaction will shift to the right, in favour of the forward direction.

A reaction is said to be at equilibrium when the concentration of reactants is equal to the concentration of the products. This means that the rate at which reactants are forming products is equal to the rate at which products are changed back to reactants.

All reactions at equilibrium follow Le Chatelier's principle, which states that if a chemical system in equilibrium is disturbed by changing the conditions (such as concentration, temperature and pressure changes), the position of equilibrium shifts to the left or to the right in order to counteract the change and to re-establish an equilibrium.

This means that if certain factors in a chemical reaction at equilibrium is changed, the reaction will shift either to the left or to the right. If it shifts to the left, the backward reaction is favoured and more reactants are produces, but if it shifts to the right, the forward reaction is favoured, and more products are produced.

In the question above, ammonia (2NH₃) is added to the chemical system. This will cause an increase in the concentration of ammonia; hence, more ammonia will be converted to nitrogen and hydrogen in order to decrease the concentration of ammonia and re-establish equilibrium. This causes the reaction to shift to the right.

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The expression relating the concentration of a gas in \(\mu g/m^-^3 (X)\) with the concentration expressed in ppm (Y) is \(Y = (X/MW) * 10^6 / V\)

To derive an expression relating the concentration of a gas in \(\mu g/m^3 (X)\) with the concentration expressed in ppm (Y), we can use the ideal gas law. The ideal gas law states that \(PV = nRT\), where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. Rearranging the equation, we have \(n = PV/RT\)

To convert the concentration from \(\mu g/m^-^3 (X)\) to moles (n), we divide X by the molecular weight (MW) of the gas. Thus, \(n = X/MW\)

Combining the two equations, we have \(X/MW = PV/RT\)

Since the concentration expressed in ppm (Y) is the same as the number of moles per million parts of air, we can write \(Y = n * 10^6 / V\)

Substituting \(n = X/MW\), we get \(Y = (X/MW) * 10^6 / V\)

Therefore, the expression relating the concentration of a gas in \(\mu g/m^3 (X)\) with the concentration expressed in ppm (Y) is:

\(Y = (X/MW) * 10^6 / V\)

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Complete question is:

Using the ideal Gas Law, derive an expression relating the concentration of a gas \(\mu_g^-^3 (X)\) with the concentration expressed in ppm (Y). (10 pts) Hint:- Ideal gas law \(PV= nRt -R = 0.0821 atm mol^-^1\)  −MW=X= molecular weight

I think there are a bond??

Answer:

it is covalent

hope this helps!

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The volume that is occupied by the gas is obtained as  56 L.

We know that from the Avogadro's law, the volume that can be occupied by one mole of a gas is obtained as 22.4 L. This implies that we have to find the number of moles in the 70 g of the CO and then obtain the corresponding volume by simple proportion.

Number of moles of CO = 70.0 g/28 g/mol

= 2.5 moles

If 1 mole of the gas occupies 22.4 L

2.5 moles of the gas occupies 2.5 * 22.4/1 mole

= 56 L

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Answer:

Acids are sour in taste while bases have bitter taste for example Soap

Acids turn Blue litmus to Red While Bases turn Red litmus to Blue

Acids are Corrosive in concentrated form while bases Are non corrosive except concentrated form of NaOH and KOH

Answer:

1 . acid

a) acid are proton donors / electrons pair acceptors .

b) it have pH value < 7.

c) acids taste sour .

2 . base alkali

a) bases are proton acceptors/ electron pair donors .

b) it have pH value < 7 .

c) bases taste soupy .

Explanation:

may it helps you ....

Answer:

The boiling point of iodine is 363.7°F / 184.3°C

Answer:

Household cleaners, antiseptics and battery juice are examples of toxic chemicals that you cannot consume because they have high acids concentrations. However some are very healthy such as critic acids found in oranges. :) Hope this helped.

No, the rates are not equivalent. Simplifying the first rate, we can say that 1 kilometer is covered in every 40 minutes. In the second rate, we can say that 1 kilometer is covered in every 2 minutes.

To determine if two rates are equivalent, we need to simplify the rates and compare the time it takes to cover one unit of distance. In the first rate, 0.75 kilometers are covered in 30 minutes. To simplify, we can divide both the numerator and denominator by 0.75, resulting in 1 kilometer covered in 40 minutes.

In the second rate, 25 kilometers are covered in 50 minutes. Simplifying by dividing both numerator and denominator by 25, we get 1 kilometer covered in 2 minutes.

Comparing the simplified rates, we see that it takes 40 minutes to cover 1 kilometer in the first rate, while it only takes 2 minutes in the second rate. Since the time required to cover the same distance differs, the rates are not equivalent.

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Answer:

Approximately \(1.7\; {\rm L}\).

Explanation:

Nitrogen \({\rm N_{2}}\, (g)\) reacts with hydrogen \({\rm H_{2}}\, (g)\) at a \(1:3\) ratio to produce ammonia \({\rm NH_3}\, (g)\):

\({\rm N_{2}}\, (g) + 3\; {\rm H_{2}}\, (g) \to 2\; {\rm NH_{3}}\, (g)\).

The ratio between the coefficient of \({\rm N_{2}}\, (g)\) and the coefficient of \({\rm H_{2}}\, (g)\) is:

\(\begin{aligned}\frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}\).

Under the ideal gas assumptions, the same ratio would apply to the volume of \({\rm N_{2}}\, (g)\) and \({\rm H_{2}}\, (g)\) in this reaction:

\(\begin{aligned}\frac{V({\rm N_{2}})}{V({\rm H_{2}})} = \frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}\).

\(\begin{aligned}V({\rm N_{2}})= \frac{1}{3}\, V({\rm H_{2}})\end{aligned}\).

Given that \(V({\rm H_{2}}) = 5.0\; {\rm L}\):

\(\begin{aligned}V({\rm N_{2}}) &= \frac{1}{3}\, V({\rm H_{2}}) \\ &= \frac{1}{3}\times 5.0\; {\rm L} \\ &\approx 1.7\; {\rm L}\end{aligned}\).

(Rounded to \(2\) significant figures.)

The compounds which have higher entropy is, CH₃CH₂OH, CH₄ and NH₄Cl(aq).

CH₃CH₂OH should have a higher entropy value compared to CH₃OH. This is because CH₃CH₂OH has a larger molecular size and more degrees of freedom, leading to a larger number of microstates available to the system at the same temperature.

CH₄ should have a higher entropy value compared to CH₃Br. This is because CH₄ is a gas at room temperature and has a larger number of microstates available to the system compared to CH₃Br, which is a liquid at room temperature.

NH₄Cl(aq) should have a higher entropy value compared to NH₄Cl(s). This is because NH₄Cl(aq) is a solution and has more degrees of freedom, leading to more microstates available to the system than NH₄Cl(s), which is a solid.

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--The complete question is, Which of the compounds in each pair should have the higher entropy value at the same temperature? Why?
a) CH3OH or CH3CHzOH
b) CH3Br or CH4
c) NH4CI (aq) or NH4Cl(s)--

The element with the lowest melting point is Ga.
Hence, Option (C) is correct answer.

Melting point is usually defined as the temperature at which solid changes to liquid.

The melting point order of B, Al, Ga, Tl is B > Al> Tl > Ga due to structural changes, melting point increases from Ga to Tl. Hence Ga has the lowest melting point among all these.

Thus from the above conclusion we can say that The element with the lowest melting point is Ga.
Hence, Option (C) is correct answer.

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Answer:

paper plate

Explanation:

A renuable source is a source that would replenish in ones lifetime. Trees make paper and grow in the span of a average human life.

Answer:

Enthalpy of solution is always Positive.

The high amount of moisture in the air traps heat causing extreme temperature differences.

A narrow range of temperatures allows organisms to survive. It varies between five degrees Celsius and thirty-five degrees Celsius. It best describes a desert climate with warm to hot temperatures year-round without a rainy season.

The desert environment is so dry that it supports only very sparse vegetation. There are few trees and shrubs or herbaceous plants that only form a very incomplete ground cover under normal climatic conditions. Deserts form when there is a lack of sunlight due to a lack of moisture. Evaporation is less due to the relatively low water content. There are also fewer clouds reflecting sunlight.

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Answer:

d

Explanation:

Answer:

Group B is the control group

Explanation:

In an experiment, a control group is the standard to which comparisons are made in an experiment.

Answer:

0

Explanation:

Given parameters:

Half-life  = 8.08days

Unknown:

What fraction is left unchanged after 16.16days = ?

Solution:

The half - life of a substance is the time taken for the half of a radioactive material to decay to half.

  Day 0           Day 8.08         Day 16.16

   100%                 50%                 0%        Parent

    0%                     50%                100%     Daughter

After 16.16 days, non of the original sample will remain unchanged.

The reaction that is occurring in this question is:

H2 + I2 -> 2 HI

As we can see, the molar ratio for H2 and I2 is 1:1, one mole of H2 for each mole of I2, and the molar ratio between any reactant and HI is 1:2, which means the number of moles of product will be two times more than the number of moles of the reactants

We have:

3.0 moles of H2

2.0 moles of I2

1.0 moles of HI

According to the molar ratio, we should have the name number of moles of I2 and H2, which means that H2 is in excess and I2 is the limiting reactant with 2 moles

If we have 2 moles of I2, and the molar ratio of I2 and HI is 1:2, we should have 4 moles of HI being produced

Therefore the theoretical number of moles is 4.0 moles of HI from 2.0 moles of I2

The 1.5 moles of water represent the actual yield of the chemical reaction.

The theoretical yield of the reaction can be described as the amount of product determined from stoichiometric calculations. The actual yield can be described as the amount of the product which is experimentally obtained.

The given chemical equation of the reaction of Hydrogen and oxygen.

\(2H_2(g) +O_2(g)\longrightarrow 2H_2O (g)\)

Given the 2 moles of hydrogen with 1 mole of oxygen to produce 2 moles of water. Therefore, 2 moles of water is the theoretical yield.

After the reaction 1.5 moles of water is actually obtained, therefore 1.5 moles of water is representing the actual yield.

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Answer:

950 neutrons were released during the fusion reaction.

Explanation:

To determine the number of protons released during nuclear fusion, we need to find the difference in the number of protons before and after the fusion reaction.

Let's denote the number of protons in the original element as P, and the number of neutrons as N. We are given that the total number of protons and neutrons (mass number) in the original element is 1500, so we can write the equation:

P + N = 1500 (Equation 1)

After the fusion reaction, two new elements are created. Let's denote the number of protons in the first new element as P1 and the number of neutrons as N1, and the number of protons in the second new element as P2 and the number of neutrons as N2.

We are given that the first new element has a mass number of 1000, so we can write the equation:

P1 + N1 = 1000 (Equation 2)

Similarly, the second new element has a mass number of 475, so we can write the equation:

P2 + N2 = 475 (Equation 3)

During the fusion reaction, excess neutrons are released. The total number of neutrons in the original element is N. After the fusion reaction, the number of neutrons in the first new element is N1, and the number of neutrons in the second new element is N2. Therefore, the number of neutrons released can be expressed as:

N - (N1 + N2) = Excess neutrons (Equation 4)

Now, we need to solve these equations to find the values of P, P1, P2, N1, N2, and the excess neutrons.

From Equation 1, we can express N in terms of P:

N = 1500 - P

Substituting this into Equations 2 and 3, we get:

P1 + (1500 - P1) = 1000

P2 + (1500 - P2) = 475

Simplifying these equations, we find:

P1 = 500

P2 = 425

Now, we can substitute the values of P1 and P2 into Equations 2 and 3 to find N1 and N2:

N1 = 1000 - P1 = 1000 - 500 = 500

N2 = 475 - P2 = 475 - 425 = 50

Finally, we can substitute the values of P1, P2, N1, and N2 into Equation 4 to find the excess neutrons:

N - (N1 + N2) = Excess neutrons

1500 - (500 + 50) = Excess neutrons

1500 - 550 = Excess neutrons

950 = Excess neutrons

Answer:

Explanation:

A solid, at a given temperature, has a definite volume  

and shape which may be affected by changes in  

temperature. Solids usually increase slightly in size  

when heated (expansion)  and usually  

decrease in size if cooled (contraction).A liquid, at a given temperature, has a  

fixed volume and will take up the shape of any  

container into which it is poured. Like a solid, a  

liquid’s volume is slightly affected by changes in  

temperature.

A gas, at a given temperature, has neither a definite  

shape nor a definite volume. It will take up the shape  

of any container into which it is placed and will  

spread out evenly within it. Unlike those of solids  

and liquids, the volumes of gases are affected quite  

markedly by changes in temperature.

Answer:

hi im just trying to get points lol hope u got ur answer

Explanation:

Answer:

Anything that has less density than water will float on water.

Explanation:

Come on! It's basic knowledge!

1. The number of mole in 0.293 Kg of Pb is 1.42 mole

2. The number of atom in 0.293 Kg of Pb is 8.55×10²³ atoms

1. How to determine the number of mole

The numbe of mole in the 0.293 Kg of Pb can be obtained as follow:

Mole = mass / molar mass

Number of mole of = 293 / 207

Number of mole = 1.42 mole

Thus, the number of mole is 1.42 mole

2. How to determine the number of atoms

The number of atoms can be obtained as follow:

From Avogadro's hypothesis,

1 mole of Pb = 6.02×10²³ atoms

Therefore,

1.42 mole of Pb = (1.42 mole × 6.02×10²³ atoms) / 1 mole

1.42 mole of Pb = 8.55×10²³ atoms

Thus, the number of atoms is 8.55×10²³ atoms

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To prepare a fractionating column from a standard distillation column, the correct answer is to pack metal mesh or glass beads into the distillation column.

A fractionating column is used in distillation to separate the components of a mixture based on their boiling points.

It contains a packed section where the vapor can condense and revaporize multiple times before exiting the column. By doing so, components with higher boiling points condense more readily and revaporize less, resulting in a separation of the mixture.

The packing material in the fractionating column provides a larger surface area for condensation and revaporization, which is essential to achieve effective separation. Therefore, packing metal mesh or glass beads into a standard distillation column can effectively convert it into a fractionating column.

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Answer:

The correct option is d. a and c are correct.

Explanation:

First, we will write a balanced equation for the reaction between methane (CH₄) and oxygen (O₂).

The reaction between methane (CH₄) and oxygen (O₂) gives carbon dioxide (CO₂) and water (H₂O). The balanced equation for the reaction is shown below

CH₄ + 2O₂ → CO₂ + 2H₂O

The number beside each molecule on the reactant side indicates the number of the individual molecules required for complete reaction and also the number beside each molecule on the product side indicates the number of the individual molecules produces in the reaction.

This means,

One molecule of methane will react with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. Hence, option a is correct.

From,

Number of molecules = Number of moles × Avogadro's number

Since Avogadro's number is constant, hence, the equation also means,

One mole of methane will react with two moles of oxygen to produce one mole of carbon dioxide and two moles of water. Hence, option c is correct.

For the mass relationship,

Mass = Number of moles × Molar mass

Molar mass of methane = 12 + 1(4) = 16 g/mol;

∴1g of methane = 0.0625 mole

Molar mass of oxygen = 16 g/mol;

∴2g of oxygen = 0.125 mole

Molar mass of carbon dioxide = 12 + 16(2) = 44 g/mol;

∴1g of CO₂ = 0.02272 mole

Molar mass of water = 1(2) + 16 = 18 g/mol;

∴2g of water = 0.11111 mole

From the equation 0.0625 mole of methane reacts with 0.125 mole of oxygen to produce 0.0625 mole of carbon dioxide and 0.125 moles of water.

Hence, option b is not correct.

A sample 0. 100 moles of a gas is collected at at STP . 2.24 is the volume of the gas in liters.

The STP means standard temperature and pressure.

At STP,

Temperature = 0 °C =273 K

Pressure = 1 atm

We get value of volume by using ideal gas equation,

PV = nRT

Calculation,

Since, one mole of a gas occupy 22.4 L volume at STP

So, for 0.1 mole volume occupy = 22.4L × 0.1 mole/1 mole =  2.24L

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The statement "Chlorine atoms from CFC molecules speed the breakdown of stratospheric O3 in a process that is affected by both homogeneous and heterogeneous catalysis" is TRUE because these atoms are created by the photodissociation of CFCs, which occurs when CFCs are exposed to ultraviolet radiation in the stratosphere.

CFCs, or chlorofluorocarbons, are a category of manufactured substances that are mainly used as refrigerants and solvents. CFCs are well-known contributors to stratospheric ozone depletion, and their emissions have been banned in many nations across the world.

Stratospheric ozone depletion- Chlorine atoms and bromine atoms are primarily responsible for stratospheric ozone depletion. These atoms are created by the photodissociation of CFCs, which occurs when CFCs are exposed to ultraviolet radiation in the stratosphere. Once formed, these atoms catalyze the decomposition of ozone by a mechanism known as the catalytic cycle of ozone depletion.

Heterogeneous and homogeneous catalysis- Chlorine atoms are involved in both homogeneous and heterogeneous catalysis in the stratosphere. Homogeneous catalysis occurs when chlorine atoms react directly with ozone to produce chlorine monoxide and oxygen. Chlorine monoxide then reacts with other ozone molecules, catalyzing their decomposition, which generates more chlorine atoms, thus perpetuating the catalytic cycle.

Heterogeneous catalysis, on the other hand, occurs when chlorine atoms react with other molecules, such as water vapor, to form highly reactive intermediates. These intermediates then react with ozone molecules, catalyzing their decomposition, just like in the homogeneous catalytic cycle.

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