23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.

After reducing the starting volume, the gas has a resultant pressure of 3 atm.

Describe Boyle's Law.

Boyle's Law states that a gas's pressure is inversely proportionate to its volume at constant temperature:

P ∝ 1/V

The necessary equation for the posed question is:

P1V1 = P2V2, and

Initial pressure is P1 and is 1.5 atm.

Initial volume = 2 L for V1.

final pressure = P2 =?

Final volume = 1 L, or V2.

Using the aforementioned equation and all of these data, we obtain

P₂ = \(\frac{(1.5x2)}{1}\)= 3atm

Therefore, 3 atm of pressure is needed.

Learn more about Boyle's law here https://brainly.com/question/19491032

#SPJ10

The naturally occurring the element x exists in three isotopic forms. The average atomic weight of x 28.544 amu.

Given that :

x- 28, Abundance % = 67.14 % = 0.6714

The atomic mass = 27.343 amu

x-29, Abundance % = 10.50 % = 0.1050

The atomic mass = 28.889 amu

x- 32, Abundance %  = 22.36 % = 0.2236

The atomic mass = 31.993 amu

The average atomic weight = ( 27.343 × 0.6714 ) + ( 28.889 × 0.1050) +

                                                          ( 31.993 × 0.2236)

                                                 = 18.358 + 3.0333 + 7.153

                                                 = 28.544 amu

Thus, the average atomic weight of naturally occurring element x exists in three isotopic forms 28.544 amu.

To learn more about average atomic weight here

https://brainly.com/question/28013988

#SPJ4

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

To know more about chromatography, visit:

https://brainly.com/question/11960023

#SPJ11

To prepare a 0.500 M HCl solution with a volume of 0.250 L, you would need to measure 12.5 mL of the 5.00 M HCl solution. To reach the desired volume, no additional water needs to be added.

a. To calculate the volume of the 5.00 M HCl solution needed, you can use the equation:

M1V1 = M2V2

where M1 is the initial concentration, V1 is the initial volume, M2 is the desired concentration, and V2 is the desired volume.

Plugging in the values:

M1 = 5.00 M

V1 = ?

M2 = 0.500 M

V2 = 0.250 L

Rearranging the equation to solve for V1:

V1 = (M2 * V2) / M1

= (0.500 M * 0.250 L) / 5.00 M

= 0.0125 L

= 12.5 mL

Therefore, you would need to measure 12.5 mL of the 5.00 M HCl solution to prepare the desired 0.500 M HCl solution with a volume of 0.250 L.

b. Since the desired volume is already 0.250 L, no additional water needs to be added. The volume of the 5.00 M HCl solution calculated in part a is sufficient to prepare the desired solution.

To learn more about concentration click here:

brainly.com/question/30862855

#SPJ11

Answer:

A-battery

Explanation:

A battery has a positive and negative charge which can power a light bulb through the wires as long as the bulb is also connected to the other ends of the wires.

Answer:

1. 7 periods

2. 18 groups

3.Magnessium

4.Fluorine

5.Nickel

6.Radon

7.Francium

8.Lead

Explanation:

The process that converts straight-chain alkanes into branched hydrocarbons is called: B. cracking.

The process that converts straight-chain alkanes into branched hydrocarbons is called option B: cracking. Cracking is a chemical process widely used in the petroleum industry to break down larger hydrocarbon molecules into smaller ones. It involves the thermal decomposition of hydrocarbons under high temperatures and pressures, often in the presence of a catalyst.

During cracking, long-chain alkanes are subjected to heat and pressure, causing the carbon-carbon bonds to break. This results in the formation of shorter hydrocarbon chains, including branched hydrocarbons. The process can occur in various forms, such as thermal cracking, catalytic cracking, or hydrocracking, depending on the specific conditions and desired products.

By converting straight-chain alkanes into branched hydrocarbons, cracking enhances the volatility, stability, and reactivity of the resulting hydrocarbon products. It is an essential process in the production of gasoline, diesel fuel, and other valuable hydrocarbon derivatives, as branched hydrocarbons often exhibit improved combustion characteristics and higher octane ratings.

Overall, cracking plays a vital role in the petroleum refining industry, enabling the transformation of long-chain alkanes into a more diverse range of hydrocarbon products with desired properties and applications.

To know more about alkanes refer here:

https://brainly.com/question/24270289

#SPJ11

Answer:

is this a full question ????

Explanation:

21.0 g of hydrogen is mixed with 7.0 g of nitrogen then the maximum mass of ammonia that can be produced from this reaction is 8.51gram.

Limiting agent is reactant in a reaction which is in smallest amount, that is totally consumed when a chemical reaction is completed

The balanced reaction is

\(N_{2}+3H_{2}\rightleftharpoons 2NH_{3}\)

moles of nitrogen= 7.0÷28=0.25

moles of hydrogen=21.0÷2.016=10.41

To know the limiting reagent we have to divide moles by stoichiometry

0.25÷1=0.25

10.41÷3=3.47

0.25 is lesser than 3.47 so Nitrogen is limiting reagent so reaction will run according this only

1 Moles of nitrogen=2 mole of ammonia

0.25 mole of nitrogen = 2×0.25=0.5 mole of ammonia

mass of ammonia= 0.5mole×Molar mass of ammonia

                             = 0.5×17.031

                                =8.51g

Thus the mass of ammonia formed is 8.51g

TO know more about limiting reagent, here:

https://brainly.com/question/26905271

#SPJ1

The acidic cοmpοund that activates pepsinοgen is hydrοchlοric acid (HCl).

An acidic cοmpοund is a substance that can release hydrοgen iοns (H+) when dissοlved in water, resulting in an increase in the cοncentratiοn οf H+ iοns and a decrease in pH. Examples οf acidic cοmpοunds include hydrοchlοric acid (HCl), sulfuric acid (H₂SO₄), acetic acid (CH₃COOH), and citric acid (C₆H₈O₇).

Takes οff οne aminο acid frοm the -COOH side οf a peptide chain: Carbοxypeptidase

Takes οff οne aminο acid frοm the amine side οf a peptide chain: Aminοpeptidase

Brush-bοrder enzyme that is vital tο the digestiοn οf breast milk: Lactase

Salivary amylase: Enzyme fοund in saliva that breaks dοwn starch intο smaller sugars

Acidοphilic enzyme that cleaves all peptide bοnds between tyrοsine and phenylalanine: Pepsin

Deοxyribοnuclease: Enzyme that breaks dοwn DNA intο smaller fragments

Pepsinοgen: Inactive precursοr fοrm οf pepsin, which is activated by an acidic cοmpοund called hydrοchlοric acid (HCl) in the stοmach.

To know more about acidic compound, refer here:

https://brainly.com/question/30723218

#SPJ4

Answer: Counter-Clockwise.

Explanation: Please brainliest. I'm almost next tier.

Approximately 50 grams mass of \(KNO_{3}\) will dissolve in 50 mL of water at 60°C.

What is mass?

Mass is a fundamental physical quantity that refers to the amount of matter in an object. It is a scalar quantity that measures the inertia of an object.

The solubility of  \(KNO_{3}\) in water depends on temperature. At 60°C, the solubility of  \(KNO_{3}\) is approximately 100 g/100 mL of water.

To determine the mass of  \(KNO_{3}\) that will dissolve in 50 mL of water at 60°C, we can use the following equation:

mass of  \(KNO_{3}\)  = (solubility of \(KNO_{3}\)  at 60°C) × (volume of water)

mass of \(KNO_{3}\)  = (100 g/100 mL) × (50 mL)

mass of \(KNO_{3}\)  = 50 g

Therefore, approximately 50 grams of  \(KNO_{3}\) will dissolve in 50 mL of water at 60°C.

What is solubility?

Solubility is the ability of a substance, called the solute, to dissolve in a solvent to form a homogeneous solution. The solubility of a substance depends on the nature of the solute, the solvent, and the conditions under which the solution is formed, such as temperature, pressure, and concentration.

The amount of solute that can dissolve in a given amount of solvent at a particular temperature and pressure is known as the solubility of the solute. Solubility is typically expressed in units of mass per unit volume, such as grams per liter (g/L) or moles per liter (mol/L).

The solubility of a substance can vary widely depending on the solvent. For example, water is a good solvent for many ionic and polar compounds, while nonpolar solvents like benzene and hexane are better at dissolving nonpolar substances like oils and fats.

To know more about solubility, visit:

https://brainly.com/question/26766449

#SPJ1

Complete question is: 50 grams mass of \(KNO_{3}\) will dissolve in 50 mL of water at 60°C.

C. physical change

Explanation:

That's the answer

The pOH of a 3.6pH solution is 10.4. This indicates the alkalinity of a solution based on the hydroxide ion concentration.

pH is the negative logarithm of hydrogen ion concentration while pOH is the negative logarithm of hydroxide ion concentration. High value of pH indicates the alkalinity of the solution while high value of pOH indicates the acidity of the solution.

The sum of pH and pOH is equal to the dissociation constant of water, which is 14. pOH can be obtained using the value of pH given above.

pH + pOH = 14

3.6 + pOH = 14

pOH = 14- 3.6

pOH =  10.4

The 10.4 pOH value indicates that the solution is considered acidic since it is between the value of 8 to 14. Based on this pOH value, the hydroxide concentration is \(10^{-10.4}\) or 3.98x10-11 mol/L.

To learn more, please refer to the link https://brainly.com/question/17144456.

#SPJ4

Answer:

\(\large \boxed{\text{D.) 91 kPa}}\)

Explanation:

We can use the Ideal Gas Law — pV = nRT

Data:

V = 15.0 L

n = 0.55 mol

T = 300 K

Calculation:

\(\begin{array}{rcl}pV & =& nRT\\p \times \text{15.0 L} & = & \text{0.55 mol} \times \text{8.31 kPa$\cdot$ L$\cdot$K$^{-1}$mol$^{-1}\times$ 300 K}\\15.0p & = & \text{1370 kPa}\\p & = & \textbf{91 kPa}\end{array}\\\text{The pressure in the container is $\large \boxed{\textbf{91 kPa}}$}\)

The heat of formation of nitrogen (II) oxide : +91.3 kJ/mol

Given

Reaction

N2(g) + O2(g) + 182.6 kJ → 2 NO(g)

Required

The heat of formation

Solution

In the above reaction, the heat of the reaction is located on the reactant side which indicates that the formation of nitric oxide requires heat (endothermic reaction).

In the above reaction the heat required to form 2 moles of NO, so the heat required for each mole is:

+182.6 kJ : 2 = =+91.3 kJ/mol

The volume of the gas is obtained as 5.99 L.

The ideal gas equation is used to predict how ideal gases will behave in various scenarios and describes the relationship between the physical properties of gases. The equation takes the ideal behavior of gases as a given.

We know that the number of moles = mass/Molar mass

= 12.5 g/44 g/mol

= 0.28 moles

Using;

PV = nRT

V = nRT/P

V = 0.28 * 0.082 * 313/1.2

V = 5.99 L

Th new volume of the gas is 5.99 L

Learn more about ideal gas:https://brainly.com/question/14826347

#SPJ1

The major disadvantage is - Ozone decomposes quickly and does not provide long-term protection against possible contamination as the water is piped through a municipal distribution system.

The gas ozone (O3) is unstable. As a result, it breaks down quickly, oxidizing any organic impurities present in the water including bacteria, viruses, and germs, but because it is a gas, it leaves the water after the oxidation is complete. Therefore, when the ozone started to disintegrate at first, the water may have various additional contaminants that mix with it as it travels through the municipal distribution system. Water carries through the new pollutants from the pipes. Ozone therefore has no long-term effect.

Chlorination produces trihalomethane, not ozonation, hence the expansiveness of ozone is dependent on the impurity of the water. Trihalomethane is produced by chlorination, not ozonation. Although ozone as a gas has a faint odor, when it is combined with water, it oxidizes the pollutant and breaks down, leaving no ozone in the water. Therefore, water does not smell like ozone.

Learn more about ozonation:

brainly.com/question/27911475

#SPJ4

The presence of a common ion refers to a situation in which an ion that is already present in a solution is added to a reaction that involves the same ion. For example, if a solution already contains chloride ions and more chloride ions are added to a reaction that involves chloride ions, then the added chloride ions are considered a common ion.

In the case of the equilibrium involving HNO2, NH4+, and NO2-, the presence of a common ion (such as NH4+) would shift the equilibrium towards the reactant side because it would increase the concentration of NH4+ in the solution. This would cause a decrease in the concentration of HNO2 and NO2-. The Le Chatelier's principle predicts that the equilibrium would shift to counteract the increase in NH4+ concentration, and so the reaction would proceed in the direction that uses up NH4+.

Overall, the presence of a common ion affects the equilibrium by changing the concentration of one or more of the ions involved in the reaction, which can cause the equilibrium to shift towards one side or the other in order to maintain the equilibrium constant.

To know more about common ion visit:-

https://brainly.com/question/28202991

#SPJ11

Imagine a solution containing only water, sodium, and glucose. if a voltage is applied to the solution, there would be no net movement of glucose

The given declaration is wrong. Glucose answers aren't electrolytes and consequently do now no longer behavior power. Is sodium chloride an awesome conductor of power? Simply with the aid of using dissolving or dissolving it in water, it can not behavior power as a solid.

Saline includes Na+ and Cl- ions. If ions are gifted withinside the answer, those ions can pass thru the answer and convey an electric-powered current. Pure water and sugar answers do now no longer include widespread ions. glucose molecules do now no longer smash down into ions whilst dissolved.

When glucose is introduced to water, it dissolves without difficulty however now no longer dissociates into ions. Therefore, a glucose answer isn't an electrolyte and isn't a conductor of power.

Learn more about glucose here;

https://brainly.com/question/461228

#SPJ4

Answer:

They move at a rate of one to two inches (three to five centimeters) per year.

Explanation:

The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.

Answer:

4.2 gigagrams

Explanation:

kilo = 1,000

giga = 1,000,000,000

milli = .001

Answer:

.75 Tons

Explanation:

1 Ton is equal to 2,000 pounds

Answer:

Only reaction 1

Explanation:

C + O2 → CO

the charge of C in CO is +2 (oxidation)

from 0 to +2

the charge of O in CO is -2 (reduction)

from 0 fo -2

Hence it is a redox (reduction-oxidation) reaction

This is also valid for,

C + O2 → CO2

the charge of C in CO2 is +4 (oxidation)

charge increases from 0 to +4

the charge of O in CO2 is -2 (reduction)

charge decreases from 0 to -2

hence, it is a redox reaction

K2SO4 + CaCl → KCl + CaSO4

none of the charges changes in this reaction

please recheck, for this may not be the correct answer

Answer:

I would say A but I'm not sure

When tin metal is placed into a solution of nickel (II) iodide then nothing will occur.

Reactivity series of the metals tells about the increasing or decreasing orders of the reactivity of the metals.

According to the reactivity series, reactivity of nickel metal is more than the tin metal. So, if we add tin metal in the solution of nickel (II) iodide then no reaction occurs. Because the reactivity of tin is less as compare to nickel metal so it is not possible for tin to replace the nickel metal and get dissolve.

Hence, option (C) is correct i.e. nothing.

To know more about reactivity series, visit the below link:
https://brainly.com/question/17469010

Answer:

Dirty sand is piled on a sheet of fine mesh stretched between two long poles, the mesh collects the mircoplastic and other materials while allowing the sand to fall through.

Answer:

???what metal????????????

The increase in pressure when a basketball is pumped up is caused by the change in the number of molecules (optionC).

When air is pumped into a basketball, the air molecules are forced into a smaller space, which increases the number of molecules in that space. This increase in the number of molecules leads to an increase in the pressure of the gas within the ball.To better understand why this is the case, we can use the ideal gas law, which describes the behavior of gases under various conditions. The ideal gas law is expressed as PV = nRT, where P is pressure, V is volume, n is the number of molecules, R is the gas constant, and T is temperature.
When air is pumped into a basketball, the volume of the ball remains the same (assuming the ball is rigid and does not expand), and the temperature of the air inside the ball does not change significantly. Therefore, according to the ideal gas law, the only way the pressure can increase is if the number of molecules (n) increases.
This increase in pressure is what makes the ball bouncy and allows it to be used for games and activities. It is important to note that overinflating a basketball can lead to a rupture or bursting of the ball due to the excessive pressure created by the increased number of molecules.

for such more questions on pressure

https://brainly.com/question/24719118

#SPJ8

Answer:

\(\boxed {\boxed {\sf 2.62 \ mol \ N_2}}\)

Explanation:

The relationship between moles and gases is unique. Regardless of the type of gas, there will always be 22.4 liters of gas in 1 mole, as long as it's at STP (standard temperature and pressure).

We can make a ratio using this information.

\(\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}\)

Multiply by the given number of moles.

\(58.6 \ L \ N_2 *\frac {22.4 \ L \ N_2}{ 1 \ mol \ N_2}\)

Flip the fraction so the liters of nitrogen cancel.

\(58.6 \ L \ N_2 *\frac {1 \ mol \ N_2}{ 22.4 \ L \ N_2}\)

\(58.6 *\frac {1 \ mol \ N_2}{ 22.4 }\)

\(\frac {58.6 \ mol \ N_2}{ 22.4 }= 2.61607143 \ mol \ N_2\)

The original measurement of liters has 3 significant figures, so our answer must have the same.

For the number of moles calculated, 3 sig figs is the hundredth place. The 6 in the thousandth place tells us to round the 1 to a 2.

\(2.62 \ mol \ N_2\)

58.6 liters of N₂ gas at STP is equal to about 2.62 moles.

After the dillution of the solution, the wavelength of maximum absorption is decreased.

The wavelength of maximum absorption is the wavelength at which the solution absorbs the maximum amount of light. It is usually shown as a hump in the spectrum.

When the starting concentration of the  K2Cr2O7 is diluted, the wavelength of maxium absorption decreases.

Learn more about maximum absorption: https://brainly.com/question/26610701