A 15-cm-diameter CD has a mass of 23 gA) What is the CD's moment of inertia for rotation about a perpendicular axis through its center? Need units as wellB) What is the CD's moment of inertia for rotation about a perpendicular axis through the edge of the disk? Need units as well

Answer

50 N

Explanation

Step 1

The reaction:

Ca(OH)2 (aq) + 2 HBr (aq) => CaBr2 (aq) + 2 H2O (l) (compelted and balanced)

----------------

Step 2

Information provided:

0.0105 M HBr

125 mL of 0.0100 M Ca(OH)2

----------------

Step 3

The number of moles of Ca(OH)2:

Molarity (mol/L) = moles of Ca(OH)2/volume of the solution (L)

Volume = 125 mL x (1 L/1000 mL) = 0.125 L

Therefore,

Molarity x volume (L) = moles

0.0100 mol/L x 0.125 L = 1.25x10^-3 moles of Ca(OH)2

-----------------

Step 4

The number of moles of HBr, by stoichiometry:

Ca(OH)2 (aq) + 2 HBr (aq) => CaBr2 (aq) + 2 H2O (l)

1 mol Ca(OH)2 ------ 2 moles HBr

1.25x10^-3 moles ------ X

X = 1.25x10^-3 moles x 2 moles HBr/1 mol Ca(OH)2

X = 2.5x10^-3 moles HBr

----------------

Step 5

The volume of HBr needed:

Molarity = moles of HBr/volume of solution (L)

Volume = moles of HBr/molarity

Volume = 2.5x10^-3 moles HBr/0.0105 mol/L

Volume = 0.238 L

Volume = 0.238 L x (1000 mL/1 L) = 238 mL

Answer: 238 mL or 0.238 L (there are no matches)

The conditions that will increase the rate of a chemical reaction are:(4) Increased temperature and increased concentration of reactants. The correct answer is (4) Increased temperature and increased concentration of reactants.

Explanation: The rate of a chemical reaction depends on various factors. Some of the factors that increase the rate of a chemical reaction include the presence of catalysts, surface area, concentration, temperature, and pressure. Among these factors, temperature and concentration are the most significant factors.

Temperature: Temperature is a significant factor that influences the rate of a chemical reaction. It is observed that if the temperature is increased, the rate of reaction also increases. This is because an increase in temperature leads to an increase in kinetic energy. As the kinetic energy increases, the molecules move faster and collide more frequently. This, in turn, increases the rate of reaction.

Concentration: Another significant factor that affects the rate of a chemical reaction is concentration. When the concentration of reactants is increased, the rate of reaction also increases. This is because when the concentration of reactants is high, the number of molecules per unit volume is high, which leads to more frequent collisions between the reactant molecules.

Thus, increasing the concentration of reactants can increase the rate of a chemical reaction.

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Answer:

B condensation ............

Hydrolysis of sucrose can occur in the presence of an enzyme called sucrase, which catalyzes the breakdown of sucrose into glucose and fructose.

Sucrose is a disaccharide composed of glucose and fructose molecules linked together by a glycosidic bond. When sucrase is present, it breaks this bond by adding a molecule of water (H₂O), causing the sucrose molecule to split into its constituent parts, glucose and fructose.

This process of hydrolysis is important for the body's digestion and metabolism of sucrose, as glucose and fructose are more readily absorbed and utilized by the body than sucrose itself. Hydrolysis of sucrose can also occur in certain food processing methods, such as cooking or fermentation, which can lead to the formation of invert sugar.

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--The complete question is, Under what conditions did you see hydrolysis of sucrose?--

Sex cells, also known as gametes, transmit genetic information for determining traits to their offspring through a process called meiosis.

During meiosis, the diploid parent cell undergoes two rounds of cell division, resulting in four haploid daughter cells, each containing half the genetic information of the parent cell.

In humans, the male sex cell, or sperm cell, and the female sex cell, or egg cell, each contains 23 chromosomes, which combine during fertilization to form a diploid zygote with 46 chromosomes. The genetic information carried by these chromosomes determines various traits such as eye color, height, and susceptibility to certain diseases.

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The correct positions of the different molecular sizes within the column chromatography are as follows: Small molecules: Start,    Intermediate molecules: Middle, and    Large molecules: End

Chromatography is based on the principle where molecules in mixture applied onto the surface or into the solid, and fluid stationary phase (stable phase) is separating from each other while moving with the aid of a mobile phase.

During the process of column chromatography, the different molecular sizes will settle at different positions. The small molecules are going to travel through the column at a much slower pace than the larger molecules. The three molecular sizes involved in the process of column chromatography are the following:

i) Small molecules

ii) Intermediate molecules

iii) Large molecules

Now, we have to place these molecules in their respective positions. The following is a drag and drop table which shows the positions of each molecule within the chromatography process:

Molecule size                      Position

Small molecule                         Start

Intermediate molecule           Middle

Large molecule                         End

Therefore, the correct positions of the different molecular sizes within the column chromatography are as follows:

Small molecules: Start      Intermediate molecules: Middle      Large molecules: End

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Answer: 5 all of the above

Explanation:

A mutation can be a blessing or a curse. It can also have no effect on the person at all.

Hope this helps

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what is difference about scientist thinking and common peoples thinking and what is logical thinking

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\( \orange{\underline{\huge{\bold{\textit{\green{\bf{DIFFERENCE}}}}}}} \)

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SCIENTIST THINKING and COMMON PEOPLES THINKING:-

\(\blue{SCIENTIST\: \: \: THINKING-> }\)

They believe in asking questions to themselves and try to find there answers by themselves with help of there observation with large number of observation sometimes they also provide a hypothesis.

They use always use critical thinking which helps one to think and solve one situation beyond its memory. this helps to find new ideas

They use inductive reasoning or deductive reasoning to develop a hypothesis deriving most logically from available data.

\( \orange{COMMON \: \: PEOPLES \: \: THINKING-> }\)

They believe easily on what other told them to believe. common people relay on the answer of the experts or scientists then researching on the topic themselves

Critical thinking is rare in Common public thinking bez in our daily routine we believe on what we read and hear.

logical thinking is found rare in common public as they didn't think about the logic of what is happening in day to day life .

\(\bold{\green{Part 2:- What \: Is \: Logical \: Thinking}}\)

It the way of thinking in which we check about the logic of the what is happening around u

In this type of Thinking a person finds reasons and causes of each and every observation

This helps in new law formation and helps in finding the solution of each and every problem.

With the logical thinking one uses feedback in positive way and try to solve that.

This type of thinking our lines become short and clear . this helps us to give perfect answer for each and everything.

At a temperature of 150 °C and a pressure of 1 atm, the maximum volume that 5 moles of gas produced by the full breakdown of 1 mole of Ca(NO3)2 would occupy are 17.1 L.

Would occupy at a temperature of 150 °C and 1 atm pressure. Using the ideal gas formula, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, it is possible to determine the maximum volume of the gas created. The volume of 5 moles of gas at 150 °C (423 K) and 1 atm pressure can be computed as follows:

V = (nRT)/P = (5 mol x 0.0821 L/atm/mol/K/423) K / 1 atm = 17.1 L

The balanced equation predicts that 2 moles of Ca(NO3)2 will result in 4 moles of NO2 and 1 mole of O2. As a result, 1 mole of Ca(NO3)2 completely decomposes into 4 moles of gas and 1 mole of solid.

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The first one appear to be a pan with some liquid heating up.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The second one seems to be a ice cube melting.

Its beginning phase is solid, the phase change type is fusion, and its ending state is liquid.

The third one is water, or other liquid, making clouds.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The fourth illustration seems to be an aluminium can. There aren't really a phase change happening, but when we open the aluminium can containing gaseous drink, there are molecules of gas diluted into the liquid and some of it encouter each other to make a bubble of the gas and is released. It is not an actually phase change, it is the reverse process of diluting gas into liquid. Initially it is diluted gas, it gets released and in the end it is in gas phase.

Answer:

C

Explanation:

Answer:

if its 5X 10^3 mm=5m and if its 5X 10^-3 mm=5X 10^-6m

Explanation:

we know,

1m= 1000mm

as given 5X 10^3 mm we have to convert to meter

now  5X 10^3 mm= 5X 10^3/1000=5m

but if its  5X 10^-3 mm= 5X 10^-3/1000= 5X 10^-6m

thank u,

Answer:

mercury and bromine are the only two elements

Answer:

Mouth

Explanation:

Answer:

A - mouth

Explanation:

edge

Answer:The atoms in gases are far apart from each other, so they are much more disordered than either liquids or solids.

Explanation:

198 ml To create 4% NaOH, you will need 7.92 grammes of sodium hydroxide, or (4 x 198)/100. So, 7.92 grammes of sodium hydroxide are dissolved in 198 ml of water.

The molarity of a solution is decreased by dilution. An aqueous solution's volume grows with the addition of more water, while the solute's moles remain constant. As a result, the solution's concentration and molarity are reduced.

Dilution happens as the solution's volume increases. As just a result, conductivity decreases and ions per millilitre increase. The molar conductivity is calculated using one mole of ions. The molar conductivity of the solution rises as a result of increased ion separation and mobility.

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Answer:

It causes more creases and wrinkles making it hard to get a clean cut.

Explanation:

After ripping off sheets of aluminum foil from a roll, you may need to cut various shapes for your project. Aluminum foil easily creases and wrinkles, making it difficult to cut into smaller or more designs.

This is my opinion of this question please feel free to alter to yours.

Answer:

H2S

Explanation:

The gas with the smallest molar mass diffuses the fastest (assuming that the holes are the same size and that gasses act ideally).
Find the molar mass of each of the gasses, and then compare.
CO2 = 12 + 16 + 16 = 32 + 12 = 44
HCl = 35.45 + 1 = 36.45
H2S = 1 + 1 + 32 = 34
NO2 = 14 + 16 + 16 =  32 + 14 = 46
Therefor, H2S diffuses the fastest, then HCl, then CO2, and finally NO2

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The neutralization reaction between aluminum hydroxide (Al(OH)₃) and sulfuric acid (H₂SO₄) can be represented by the following balanced equation:

2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O

In this reaction, two moles of aluminum hydroxide react with three moles of sulfuric acid to form one mole of aluminum sulfate (Al₂(SO₄)₃) and six moles of water (H₂O). The aluminum hydroxide acts as a base, and the sulfuric acid acts as an acid. The hydrogen ions (H⁺) from the sulfuric acid react with the hydroxide ions (OH⁻) from the aluminum hydroxide, resulting in the formation of water. Meanwhile, the aluminum and sulfate ions combine to form aluminum sulfate. This balanced equation accurately represents the neutralization of aluminum hydroxide by sulfuric acid.

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70.6 litres of bromine trifluoride is required to produce 106 liters of fluorine gas according to the following reaction provided that all gases are at the same temperature and pressure.

Since, 2BrF3 (g) gives Br2 (g) + 3 F2 (g)

Here 2 mole BrF3 produces 3 mole F2

If volume produced of F2 is 106 litres

Therefore, volume of BrF3 =?

Since, v1 is directly proportional to n1

Therefore, v1/n1 = v2/n2

v1/2moles = 106 litres/3 moles

v1= 212/3 = 70.6 litres

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Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.

Answer:

Br2, CBr4, AsBr3, CaBr2. this is the increasing order of boiling point

The arrangement of given compound in the increasing order of normal boiling point is Br₂ < CBr₄ < AsBr₃ < CaBr₂.

Norma boiling point of any liquid is that point where the vapor pressure is equal to the standard sea level atmospheric pressure.

And boiling point is directly proportional to the strength of bond which is present between the atoms of any compound.

So, correct order will be Br₂ < CBr₄ < AsBr₃ < CaBr₂.

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CuSO4 + 2 NaOH = Na2SO4 + Cu(OH)2 is well balanced

Answer:

Concept of chemi-fluorescence

Explanation:

A glow stick usually consists of two chemicals in a larger plastic tube: , a base catalyst (mostly sodium salicylate), and a suitable dye (sensitizer, or fluorophor). This creates an exergonic reaction when mixed together.

When a glow stick is bent, the flurophor which is a chemical that easily re-emits light upon excitation in smaller capsules is released into the other substance, there by causing it to emit radiation/light in the uv-visible region. The brightness and longevity of the glow stick is determined by varying the concentration of these chemicals.

I hope this explanation clarifies things.

Answer:

HOCH₂CH₂OH

Explanation:

You generally assume that polar dissolves polar and nonpolar dissolves nonpolar.  Since water is polar, we are looking for a polar molecular.  

This cancels out CH₃(CH₂)₉CH and CCl₄.

You are left with CHCl₃, CH₃(CH₂)₈CH₂OH, and HOCH₂CH₂OH.  You would pick the third option since it is the most polar.

The compound HOCH2CH2OH having two O - H groups is more likely to interact with water.

A substance is soluble in water if it is capable of interacting in an electrostatic interaction. Water can form hydrogen bonds with other molecules that posses polar O - H bonds.

Hence, looking at the options provided in the question, we will observe that the compound HOCH2CH2OH having two O - H groups is more likely to interact with water.

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Answer:

c. 32.0 mL

Explanation:

Buret can measure upto one tenth of a mL . That means it can measure upto one decimal point of a mL . Out of given measurement 32.0 mL reads upto one decimal point of mL so this reading seems to be the reading taken of a liquid in a buret.