How does the temperature change when a layer of glass is added?

The mass of \(SO_3\) produced by reacting 6.3g of \(SO_2\) with oxygen in the synthesis reaction is 7.875g.

Given the mass of \(SO_2\) reacted = 6.3g

\(2SO_2(g) + O_2(g) -- > 2SO_3(g)\)

We can see that 2 moles of \(SO_2\) produce 2 moles of \(SO_3\).

The mole ratio of \(SO_2\) : \(SO_3\) = 1 : 1

The molar mass of Sulfur dioxide = 64g/mol.

The number of moles of Sulfur dioxide reacted = 6.3/64 = 0.098mol

Since the mole ratio is 1 the moles of \(SO_3\) produced = 0.098

The molar mass of Sulfur trioxide = 80g/mol

The mass of \(SO_3\) produced = 0.098 * 80 = 7.875g

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Answer:

20

Explanation:

The average of the squared distance between the origin and points in the solid cylinder is equal to one-third of the height of the cylinder.

To find the average of the squared distance between the origin (0, 0, 0) and points in the solid cylinder, we can use the concept of integration. Let's assume the cylinder has a radius 'r' and height 'h'. We need to find the average value of the squared distance from the origin to any point within the cylinder.

The squared distance from the origin to a point (x, y, z) can be calculated as x²+ y² + z². Since the cylinder is symmetric about the z-axis, we can ignore the x and y components and only focus on the z component. The squared distance simplifies to z².

To find the average, we need to integrate z² over the volume of the cylinder and divide it by the volume of the cylinder. The volume of a cylinder is given by V = πr²h, where r is the radius and h is the height.

Integrating z²over the volume of the cylinder, we get:

∫[0 to h] ∫[0 to 2π] ∫[0 to r] z² r dz dθ dr

Solving this triple integral gives us (1/3)\(h^3\)πr².

Dividing this by the volume of the cylinder, we get:

(1/3)\(h^3\)πr² / (πr²h)

Simplifying further, the πr² terms cancel out, leaving us with:

(1/3)\(h^3\)/ h = (1/3)h²

Therefore, the average of the squared distance between the origin and points in the solid cylinder is equal to one-third of the height of the cylinder.

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Answer:

First shell is lower

Explanation:

The electron has to absorb energy to excite and go to higher energy levels/ shells and should release energy to go to lower energy levels/ shells. This means higher the shell , more energy is required and vice versa

Answer:

option d

Explanation:

isotope means atoms with different mass no. 17 and 18 written on the left represent mass number

this is because atoms can differ in mass no.

As a gas condenses to a liquid it releases the thermal energy it absorbed to become a gas. During this process the temperature of the substance does not change.

Energy changes  is the process of changing energy from one form to another.

Energy is used to break bonds in reactants and energy is released when new bonds form in products. Energy may change form during a chemical reaction but the same amount of energy remains after the reaction as before. The law of conservation of energy states that matter cannot be created or destroyed.

Therefore, the conversion of one form of energy into another is energy changes.

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Answer:

Presence of an Electrolyte

Metal Surface

Oxygen or Other Oxidizing Agent

Difference in Potential

Electrochemical Pathway

Explanation:

Answer:

Sr(C₂H₃O₂)₂(aq) ----------> Sr^2+(aq) + 2C₂H₃O₂^-(aq)

Explanation:

When an ionic compound is dissolved in water, ions are formed. The number of ions formed us proportional to the number of ions that combine to form the compound.

For Sr(C₂H₃O₂)₂, two ions make up the compound; Sr^2+ and C₂H₃O₂^-. The dissociation of the compound in water yields;

Sr(C₂H₃O₂)₂(aq) ----------> Sr^2+(aq) + 2C₂H₃O₂^-(aq)

Hence two ions are formed.

Answer:

6.64 x 10^-24  gm

Explanation:

One mole  ( 6.022 x 10^23 atoms)  of Helium = 4.00  gm

4.00 gm / 6.022 x 10^23 = .664 x 10^-23 gm = 6.64 x 10^-24 gm

The balanced chemical reaction coefficients are 1, 1, 1 in the breakdown reaction of heating magnesium hydroxide to create water vapor and magnesium oxide.

The definition of a balanced chemical equation is one in which the number of atoms in the reactants and the result are equal.

Mg(OH)₂———- MgO + H₂0

is the chemical equation for the reaction that occurs when magnesium hydroxide is heated.

Since there is only one Mg atom on the reactant side, there are two O atoms on the same side.

O atoms on the reactant side = 2

Mg atoms on the reactant side = 1

O atoms on the product side = 2

O atoms on the product side = 2

The chemical equation above is therefore balanced.

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Answer:

Balancing Chemical Equations

Balance the equations below:

1) __1__ N2 + __3__ H2      >       _2__ NH3

2) __2__ KClO3  >⮴ __2__ KCl + __3__ O2

3) __2__ NaCl + __1__ F2 ⮴ __2__ NaF + __1__ Cl2

4) __2__ H2 + __1__ O2 ⮴ __2__ H2O

5) __1__ Pb(OH)2 + __2__ HCl ⮴ __2__ H2O + __1__ PbCl2

6)__2__ AlBr3 + __3__ K2SO4 ⮴ __6__ KBr + __1__ Al2(SO4)3

7) __1__ CH4 + __2__ O2 ⮴ __1__ CO2 + __2__ H2O

8) _1___ C3H8 + _5___ O2 ⮴ __3__ CO2 + __4__ H2O

9) __2__ C8H18 + __25__ O2 ⮴ __16__ CO2 + __18__ H2O

10) __1__ FeCl3 + __3__ NaOH ⮴ __1__ Fe(OH)3 + __3__NaCl

11) __4__ P + __5__O2 ⮴ __2__P2O5

12) __2__ Na + __2__ H2O ⮴ __2__ NaOH + __1__H2

13) __2__ Ag2O ⮴ __4__ Ag + __1__O2

14) __1__ S8 + __12__O2 ⮴ __8__ SO3

15) _6___ CO2 + _6___ H2O ⮴ __1__ C6H12O6 + __6__O2

16) ___1_ K + __1__ MgBr ⮴ __1__ KBr + __1__ Mg

17) __2__ HCl + __1__ CaCO3 ⮴ __1__ CaCl2 + __1__H2O + __1__ CO2

18) __1__ HNO3 + __1__ NaHCO3 ⮴ __1__ NaNO3 + __1__ H2O + _1___ CO2

19) _2___ H2O + __1__ O2 ⮴ __2__ H2O2

20) __2__ NaBr + __1__ CaF2 ⮴ __2__ NaF + __1__ CaBr2

Explanation:

the answer is melting

Answer: melting :)

Explanation:

Answer:

3.44× 10²³ atoms

8.73× 10²⁵ molecules

37.64 × 10²³ molecules

0.014 × 10²³ molecules

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

a) 0.572 moles of Al:

1 mole = 6.022 × 10²³ atoms

0.572 mol  ×  6.022 × 10²³ atoms / 1 mol

3.44× 10²³ atoms

b) 1.45× 10² moles of SO₂:

1 mole = 6.022 × 10²³ molecules

1.45 mol × 10² ×  6.022 × 10²³ molecules / 1 mol

8.73× 10²⁵ molecules

c) 6.25 moles of Ca(OH)₂

1 mole = 6.022 × 10²³ molecules

6.25 mol  ×  6.022 × 10²³ molecules / 1 mol

37.64 × 10²³ molecules

d) 0.0024 moles of CO₂

1 mole = 6.022 × 10²³ molecules

0.0024 mol  ×  6.022 × 10²³ molecules / 1 mol

0.014 × 10²³ molecules

Explanation:

composite volcanoes are tall,steep cones that produce explosive eruption. Shield volcanoes form very large,gently sloped mounds from effusive eruptions.

The mole fraction of NH3 in the solution is 0.0502.


To find the mole fraction of NH3, we need to first calculate the total mass of the solution.

Mass of NH3 = 15.0 g
Mass of water = 250.0 g
Total mass of solution = 15.0 g + 250.0 g = 265.0 g

Next, we need to find the volume of the solution using the density given:

Density = mass/volume
Volume = mass/density

Volume of solution = 265.0 g / 0.974 g/mL = 272.11 mL

Now we can use the mole fraction formula:

Mole fraction of NH3 = moles of NH3 / total moles

To find the moles of NH3, we need to use the molar mass of NH3:

Molar mass of NH3 = 14.01 g/mol

Moles of NH3 = 15.0 g / 14.01 g/mol = 1.071 mol

To find the total moles, we need to use the volume and density:

Total moles = volume (in L) x density (in g/mL) / molar mass (in g/mol)

Total moles = 0.27211 L x 0.974 g/mL / 18.02 g/mol = 0.0150 mol

Now we can substitute these values into the mole fraction formula:

Mole fraction of NH3 = 1.071 mol / 0.0150 mol = 0.0502

Therefore, the mole fraction of NH3 in the solution is 0.0502.

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Using Boyle's law, As pressure is decreased, the volume will increase.

Boyle's Law describes how pressure and volume relate when the temperature is constant.

P1V1 = P2V2

When temperature is kept constant in this equation, pressure and volume have an inverse relationship.

When the volume is reduced, molecules have less room to move and collide more frequently, which raises the pressure. If the volume is increased, the molecules have more room to move, collisions occur less frequently, and the pressure is reduced.

The combined gas law, however, governs the connection between the three quantities when temperature is included.

As the gas volume decreases, the molecules hit the walls more frequently, raising the pressure; conversely, as the volume grows, the molecules must travel farther to contact the walls, reducing the frequency with which they do so and raising the pressure.

According to Boyle's law, a gas's pressure tends to decrease as its volume rises.

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Answer:

24.9mL of the stock solution are required

Explanation:

To solve this question we have to find, as first, the moles of HCl that we need to prepare the desire solution. These moles are taken from the stock solution as follows:

Moles diluted solution:

500.0mL = 0.5000L * (0.613mol / L) = 0.3065 moles HCl

As these moles comes from the 12.3M HCl solution, the volume that we need of the stock solution is:

Volume stock solution:

0.3065 moles HCl * (1L / 12.3moles) = 0.0249L 12.3M HCl =

Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

A disulfide bridge is an example of Covalent bond between R groups.

Disulfide bridges are also known as S-S bonds or disulfide bonds. These covalent bonds between two cysteine amino acids' sulfur atoms serve to stabilize proteins' tertiary and higher-order structures.

The linkage, which is also known as an SS-bond or occasionally a disulfide bridge, is typically created by joining two thiol groups. Disulfide bridges between thiol groups in two cysteine residues play a significant role in the secondary and tertiary structure of proteins in biology.

Disulfide bonds are a crucial structural component that stabilizes the 3D structure of mature proteins and/or causes them to display physiologically significant. They are primarily present in membrane proteins' extracellular domains and secretory proteins.

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Answer:

HCl

Explanation:

1 hydrogen 1 chlorine

Answer:

the narrator and the newsies

The language is decidable.

{〈g〉 : g is a CFG and there exists a string that is in L(G) and has at least one a terminal}.

algorithm to decide the language:

Given: Language is

{〈g〉 : g is a CFG and there exists a string that is in L(G) and has at least one a terminal}.

We need to show that the language is decidable. Let L be a context-free language generated by a CFG

G = (V, T, P, S).

We have to decide whether there exists at least one string in L which contains at least one 'a' terminal. Let S1 be a new start symbol with a production rule of the form S1 → S. We can add a new terminal symbol 'b' which is not present in the original grammar. We can also add new production rules as follows:

S1 → S|bS → a|b|Sa|SS|AS|BBSS → a|b|Sa|SS|AS|BBAS → a|b|Sa|SS|AS|BBBB → a|b|Sa|SS|AS|BB|ε

The following is the algorithm to decide the language.

1. Input: Context-free grammar G.

2. Construct a new grammar G' from G using the above production rules.

3. Construct the CYK table for all strings of length 1 to n, where n is the length of the longest string in the grammar.

4. If there exists a cell in the CYK table such that it contains S1 and a terminal 'a', then the language generated by G contains at least one string which has at least one 'a' terminal. Otherwise, the language generated by G does not contain any string which has at least one 'a' terminal.

5. Halt.

The language is decidable.

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In the experiment design in part I, the part that explains why the pattern changed to a constant relationship between the variables at higher values for mass of CuSO4 is the controlled variable.

The controlled variable is the variable that stays the same throughout the experiment. It is also known as a constant variable, and it is not allowed to change. This is done so that the effects of the independent variable on the dependent variable can be observed.

The other variables in the experiment are independent variables and dependent variables. The independent variable is the variable that is changed in the experiment. The dependent variable is the variable that is being measured. In the experiment, the independent variable is the mass of CuSO4. The dependent variable is the absorbance value. The controlled variable is the concentration of CuSO4, the volume of the CuSO4 solution, the type of the solution, the type of the cuvette, and the wavelength used.

By keeping the concentration, volume, solution type, cuvette type, and wavelength used constant, the effects of these variables on the absorbance value can be eliminated. Therefore, any changes in the absorbance value are only caused by the changes in the independent variable, which is the mass of CuSO4.

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Answer:

Air can be described as:  Mass and Mixture of Gases

Mass is defined as how much stuff an object contains - and by stuff, I mean matter, like atoms and molecules. And even though you can't see it, air has a lot of atoms and molecules. Air is a gas (as opposed to a liquid or a solid) and contains about 78% nitrogen, 21% oxygen, and 1% argon.

Explanation:

The correct answer is c. C₂H₂, which has the shortest carbon-carbon bond length.

The compound with the shortest carbon-carbon bond length is c. C₂H₂, which refers to ethyne or acetylene. Ethyne consists of a triple bond between the two carbon atoms, resulting in a shorter bond length compared to the other compounds listed.

In option a, CH₃CH₃ (ethane), the carbon-carbon bond is a single bond, which is longer than a triple bond.

In option b, CH₂CH₂ (ethylene), the carbon-carbon bond is a double bond, which is longer than a triple bond but shorter than a single bond.

Therefore, the correct answer is c. C₂H₂, which has the shortest carbon-carbon bond length due to the presence of a triple bond between the carbon atoms.

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The question is mostly solved. The definition of heat is used for this problem which tells us:

Where,

Q is the heat added to the system, 120 J

m is the mass of the metal, 5.0 g

Cp is the specific heat of the metal, 0.385J/g°C

dT is the change of temperature:

T2 is the final temperature, unknown

T1 is the initial temperature, 22°C

We clear the final temperature from the equation:

Now, we replace the known data:

Answer:

The final temperature of the metal will be 84°C

The change in the temperature will be 84°C-22°C=62°C

Answer:

Being flammable means it supports burning,e.g. Oxygen, but being combustible means burning itself too. e.g. Hydrogen.

Explanation:

Hope it helps!!

The non-metals are boron and carbon. The metal is aluminum and the metalloid is silicon.

Explanation:

non-metal = boron, carbon

metal = aluminum

metalloid = silicon

Non-metal = boron, carbon

Metal = aluminum

Metalloid = silicon

A solid material which is lustrous, hard, shiny, malleable, and sonorous with good electrical and thermal conductivity.

Metal is an element which is typically hard, shiny, fusible, malleable, and ductile, with good electrical and thermal conductivity.

A nonmetal is an element that does not have the properties of a metal.

A metalloid is an element having intermediate properties of both metals and nonmetals.

Hence,

Non-metal = boron, carbon

Metal = aluminum

Metalloid = silicon

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