The NaOH solution was made from 142. 1 g NaOH, dissolved in water and diluted to 1000. 0 +/- 0. 6 mL



What is the molarity of the NaOH solution prepared to react with the pennies?



What was the pH of the solution?

Answer:

where the wind is going

Explanation:

direction is where something is going hope it helps

Answer: number 4 Where the wind is going

Explanation:hope this helps u

The chiral compounds are those that have a non-superimposable mirror image.

1,3-dibromopropane, 2-methylheptane, 4-methylheptane, and 3-methylheptane do not have chiral centers and are not chiral.

1,1-dibromopropane and 1,2-dibromopropane both have chiral centers and can be chiral if they have different groups attached to each of the carbon atoms bonded to the bromine atoms. So, without information about the groups attached to these carbon atoms, it is impossible to determine if they are chiral or not.

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If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

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Answer:

The correct answer is B. Line Graphs

Explanation:

An experiment that could prove all cells come from preexisting cells would involve observing the process of cell division under a microscope.

To prove all cells come from preexisting cells, we can do the following steps. First, obtain a sample of living cells, such as a slice of the onion root tip. Place the sample on a microscope slide and add a stain to make the cells more visible. Next, use a microscope to observe the sample at high magnification. Look for cells that are in the process of dividing, which can be identified by the presence of a structure called the mitotic spindle.
Observe the process of cell division over time, noting how the parent cell divides into two daughter cells. Repeat this process with multiple samples to ensure that the results are consistent.

This experiment demonstrates that all cells come from preexisting cells, as new cells are created through the process of cell division. Without a parent cell, new cells cannot be formed.

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The decreasing order of ionization energy will be Mg >Al >P>K.

Ionization energy sometimes referred to as ionization potential, would be the amount of energy it takes to eliminate an electron from a single, isolated atom or molecule.

On moving top to bottom in the periodic table, ionization energy will decrease rapidly.

Al =13 (group 3)

P =15 (group 5)

Mg =12 (group 2)

K =19 (group 1)

The decreasing order of ionization energy will be Mg >Al >P>K.

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- The atmospheric pressure in Denver, Colorado, is approximately 0.829 atm.

- The atmospheric pressure in Denver, Colorado, is approximately 627.522 torr.

The atmospheric pressure in Denver, Colorado, is usually about 84.0 kPa. To convert this pressure to atm and torr units, we can use the following conversion factors:

1 atm = 101.325 kPa

1 atm = 760 torr

First, let's convert 84.0 kPa to atm:

Pressure in atm = 84.0 kPa × (1 atm / 101.325 kPa) ≈ 0.829 atm

Therefore, the atmospheric pressure in Denver, Colorado, is approximately 0.829 atm.

Next, let's convert 84.0 kPa to torr:

Pressure in torr = 84.0 kPa × (760 torr / 101.325 kPa) ≈ 627.522 torr

Therefore, the atmospheric pressure in Denver, Colorado, is approximately 627.522 torr.

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The spectator ions that remain in solution are potassium ion and nitrate ion.

The spectator ions are the ions that remain in solution after reaction. They are those ions that are unchanged at the end of the reaction. For the reaction of Cu(NO3)2 and K2S, teh products are CuS and KNO3.

As such the spectator ions that remain in solution are potassium ion and nitrate ion.

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Answer:

Erlenmeyer flasks have a narrow neck over a conical base, while beakers are basically large open-mouthed glass jars with a lip and spout for pouring. Graduated cylinders are tall cylinders with a spout to pour liquids; they have hash marks on the side to measure the volume of their contents.

Explanation:

hope it helps you alot

Answer:

Potassium Sulfide

Explanation:

K is more reactive than Fe which means K displaces Fe from the equation

Therefore, the molarity of HCl in the solution is 0.176 M.

To determine the molarity of HCl in the solution, we can use the balanced chemical equation and the stoichiometry of the reaction.

The balanced chemical equation is:

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

From the equation, we can see that the mole ratio between HCl and NaOH is 1:1. This means that for every 1 mole of NaOH used, 1 mole of HCl reacts.

Given that 35.23 mL of 0.250 M NaOH was used, we can calculate the number of moles of NaOH used:

moles of NaOH = volume (L) × concentration (M)

moles of NaOH = 0.03523 L × 0.250 mol/L

moles of NaOH = 0.0088075 mol

Since the mole ratio between HCl and NaOH is 1:1, the number of moles of HCl in the solution is also 0.0088075 mol.

Now, we can calculate the molarity of HCl:

molarity of HCl = moles of HCl / volume of HCl (L)

molarity of HCl = 0.0088075 mol / 0.05000 L

molarity of HCl = 0.176 M

Therefore, the molarity of HCl in the solution is 0.176 M.

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Answer:

C. reproduction​

Explanation:

Answer:

The phenotypic percentage of having yellow or green seeds is 50% for having either of the two colours

Explanation:

The crossing to determine the offsprings is shown in the image attached where we have two green (Yy) seeds and two yellow (yy) seeds as offsprings.

Thus, the phenotypic percentage of having yellow or green seeds is 50% for having either of the two colours.

Note, the dominant allele is "Y" while the recessive allele is "y". Thus, Yy would produce a yellow colour while yy would produce a green colour (as both mentioned in the question).

Also note that phenotype describes the outward properties/characteristics of an individual.

Velocity increased as mass grew is the proper explanation for the variations in the distances that the balls travelled.

The average kinetic energy of the particles in a substance is measured by its temperature. A substance's thermal energy can be used to calculate the total kinetic energy of its constituent particles. With increased particle mobility, a substance's temperature and thermal energy rise.

Energy is transmitted to the object once the work is accomplished, at which point it moves at a new, constant speed. Kinetic energy is a form of transferable energy that depends on the mass and speed attained.

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About 4/5.

Hope this helps.

Answer:  c

Explanation:

Answer:

Try quizlet, they have everything on there

Explanation:

The outmost free electron which is present in the outer shell is called valency. The number of elements joining together to form the compound also depends on the valency.

Each electron has revolved around the nucleus and that path is considered as orbit. The orbit is as follows:-

The free electrons are usually lie in the outmost shell.

Hence according to the question, the correct option is S and P orbit.

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Answer:

sog-20g=30g

Explanation:

Based on Lana's diagram, the correct statement that explains the results of asexual reproduction is C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes.

In the diagram, the parent cell divides into two identical daughter cells, each of which contains a complete copy of the parent cell's genetic material.

This type of reproduction, where a single parent produces offspring that are genetically identical to itself, is called asexual reproduction. It is the process by which many unicellular organisms, such as bacteria and some protists, reproduce.

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So, at STP, there are around 891 grammes of nitrogen gas in every 759 litres.

The two stable isotopes of naturally occurring nitrogen (7N) are nitrogen-14 and nitrogen-15, with nitrogen-14 constituting 99.6% of all naturally existing nitrogen. Along with one nuclear isomer, 11mN, fourteen radioisotopes with atomic masses ranging from 10 to 25 are also known.

Assuming "ST" refers to standard temperature and pressure (0°C and 1 atm), we can use the ideal gas law to calculate the mass of nitrogen gas:

PV = nRT

where n is the number of moles, P is the pressure, V is the volume, and T is the temperature, and R is the gas constant.

The temperature and pressure are 273.15 K and 1 atm, respectively, at STP.

To solve for n, the number of moles, we can rearrange the ideal gas law equation as follows:

n = PV / RT = (1 atm) * (759 L) / (0.0821 L·atm/(mol·K) * 273.15 K) = 31.8 mol

Now we can calculate the mass of nitrogen gas:

mass = n * molar mass = 31.8 mol * 28.01 g/mol ≈ 891 g.

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The functional group that the molecule below contain is: c. Hydroxyl.

The hydroxyl group , which is a distinctive functional group of alcohols and phenols, is composed of an oxygen atom bound to a hydrogen atom. The provided molecule is an alcohol since the hydroxyl group is joined to a carbon atom.

A carbon atom is doubly bound to an oxygen atom in the carbonyl functional group (>C=O), whereas an oxygen atom is coupled to two carbon atoms in the ether functional group (-O-). A distinctive functional group of amines is the amino functional group (-NH2), which consists of a nitrogen atom bound to two hydrogen atoms.

Therefore the correct option is C.

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Answer: its B)

Explanation:

it got the other answer wrong

The synthesis of glycogen in the liver is an example of anabolism.

Anabolism refers to the metabolic processes in which larger molecules are built from smaller molecules, requiring energy input. In the case of glycogen synthesis in the liver, glucose molecules are joined together to form long chains of glycogen. This process requires energy in the form of ATP, which is supplied by the breakdown of glucose through the process of glycolysis.

In contrast, catabolism refers to the metabolic processes in which larger molecules are broken down into smaller molecules, releasing energy. This process is involved in the breakdown of glycogen to release glucose when the body needs energy.

The electron transport chain is a series of electron transporters located in the inner mitochondrial membrane that plays a key role in the production of ATP through oxidative phosphorylation. It is involved in both catabolic and anabolic processes, depending on the energy needs of the cell.

What is anabolism?

Anabolism is the set of metabolic processes in which larger and more complex molecules are synthesized from smaller molecules.

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The mass of calcium sulfide produced is approximately 17.1 grams.  To determine the mass of calcium sulfide produced,.

We need to compare the stoichiometry of the balanced chemical equation for the reaction between calcium and sulfur:

Ca + S -> CaS

First, we need to convert the masses of calcium and sulfur into moles. We can use their molar masses to do this.

Molar mass of calcium (Ca) = 40.08 g/mol

Molar mass of sulfur (S) = 32.07 g/mol

Moles of calcium = mass / molar mass = 12.6 g / 40.08 g/mol ≈ 0.314 mol

Moles of sulfur = mass / molar mass = 7.6 g / 32.07 g/mol ≈ 0.237 mol

According to the balanced equation, the stoichiometric ratio between calcium and sulfur is 1:1. Therefore, the limiting reactant is sulfur since there are fewer moles of sulfur than calcium.

To determine the mass of calcium sulfide produced, we can use the mole ratio between calcium sulfide and sulfur, which is also 1:1.

Mass of calcium sulfide = moles of sulfur × molar mass of CaS

                      = 0.237 mol × (40.08 g/mol + 32.07 g/mol)

                      = 0.237 mol × 72.15 g/mol

                      ≈ 17.10 g

Rounding to the tenths place, the mass of calcium sulfide produced is approximately 17.1 grams.

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The concentration of the aqueous solution of Ca(OH)2 with a pH of 11.31 is approximately 0.00126 M.

To calculate the concentration of Ca(OH)2, we first determine the pOH of the solution by subtracting the pH from 14: pOH = 14 - 11.31 = 2.69. The pOH represents the negative logarithm (base 10) of the hydroxide ion concentration.

Using the pOH value, we can find the concentration of OH- ions: [OH-] = 10^(-pOH) = 10^(-2.69) ≈ 0.00126 M.

Since each formula unit of Ca(OH)2 dissociates into two OH- ions, the concentration of Ca(OH)2 is twice the concentration of OH- ions. Therefore, the concentration of the Ca(OH)2 solution is approximately 2 * 0.00126 M, which is 0.00252 M.

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The attraction between positive and negative ions is known as an ionic bond.

The attraction between positive and negative ions is known as an ionic bond or electrostatic attraction. Ionic bonds form when one or more electrons are transferred from one atom to another, resulting in the formation of positively charged cations and negatively charged anions. An ionic bond is a type of chemical bond that occurs between atoms when there is a large difference in electronegativity, resulting in the transfer of electrons from one atom to another.

It typically forms between a metal cation (positively charged ion) and a non-metal anion (negatively charged ion).These oppositely charged ions are then attracted to each other by electrostatic forces, forming an ionic bond. Ionic bonds are typically found in compounds composed of a metal cation and a non-metal anion, such as sodium chloride (NaCl).

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The partial pressure of ne 1.1 atm, hence the Correct Option is a).

Solution:

partial pressure of Ne = mole fraction x total pressure

10/20 / 10/20+ 10/40 = 0.6875

partial pressure of Ne = 1.6 x 0.6875 = 1.1 atm

or

Moles of Ne = 10/20 = .5 moles

Moles of Ar = 10/40 = .25 moles

Partial pressure of Ne = .5*1.6/.75 = 1.06 nearly equal to = 1.1 atm

The partial pressure of a gas is a measure of thermodynamic activity of the gas's molecules.

In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature. The total pressure of an ideal gas mixture is the sum of the partial pressures of the gases in the mixture (Dalton's Law).

The partial pressure of a gas is a measure of thermodynamic activity of the gas's molecules. Gases dissolve, diffuse, and react according to their partial pressures but not according to their concentrations in gas mixtures or liquids. This general property of gases is also true in chemical reactions of gases in biology. For example, the necessary amount of oxygen for human respiration, and the amount that is toxic, is set by the partial pressure of oxygen alone.

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The final equilibrium temperature of the system when 22.0 kg of ice at 0.00 °C is combined with 4.60 kg of water vapor at 100.0 °C is 37.8 °C.

Here, correct answer will be

This is because when a substance is cooled or heated, its temperature will eventually reach a state of equilibrium, meaning that the temperature of the substance will become uniform throughout.

To calculate the final equilibrium temperature, we use the equation for conserving energy, which states that the heat lost by the warm substance must be equal to the heat gained by the cold substance.

The heat lost by the water vapor is equal to the heat gained by the ice, and the total heat of the system is then equal to the sum of the heats of the two substances. We can then use this total heat to calculate the final equilibrium temperature of the system. The result is 37.8 °C, meaning that the temperature of the system will eventually reach equilibrium at 37.8 °C.

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The change in entropy of the 979 piece of granite is approximately 1.53 J/K.

To calculate the change in entropy, we need to use the formula:

ΔS = Cln(T2/T1)

where ΔS is the change in entropy, C is the heat capacity of the material, T1 is the initial temperature, and T2 is the final temperature.

Since the material in question is granite, we can assume that its heat capacity is approximately constant over the given temperature range. We can use the specific heat capacity of granite (0.79 J/g*K) to calculate the entropy change:

ΔS = (0.79 J/g*K) * ln(59°C/15.8°C)

≈ 1.53 J/K

Therefore, the change in entropy of the 979 piece of granite is approximately 1.53 J/K.

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The energy change for the reaction (per formula unit of CsBr) is approximately -6.22 x 10^14 kJ.

Ionization Energy (I1) of Cs: 0.624 aJ

Electron Affinity (EA1) of Br: -0.540 aJ

Cation (Cs+) Ionic Radius: 167 pm

Anion (Br-) Ionic Radius: 196 pm

1. Calculate the lattice energy using Coulomb's law:

Lattice energy = (k * |Q1 * Q2|) / r

Where k is the electrostatic constant (8.99 x 10^9 N·m^2/C^2), Q1 and Q2 are the charges of the ions, and r is the distance between the ions.

Q1 = +1 (charge of Cs+)

Q2 = -1 (charge of Br-)

r = sum of the ionic radii = 167 pm + 196 pm = 363 pm = 3.63 x 10^-10 m

Lattice energy = (8.99 x 10^9 N·m^2/C^2) * |(1.602 x 10^-19 C * 1) * (1.602 x 10^-19 C * -1)| / (3.63 x 10^-10 m)

Lattice energy = (8.99 x 10^9 N·m^2/C^2) * (2.571 x 10^-38 C^2) / (3.63 x 10^-10 m)

Lattice energy ≈ 6.34 x 10^-19 J

2. Convert the energy change to kilojoules:

Energy change = (0.624 aJ + (-0.540 aJ) - 6.34 x 10^-19 J) * (1 x 10^-3 kJ / 1 J)

Energy change ≈ (0.624 - 0.540 - 6.34 x 10^-19) x 10^-3 kJ

                         ≈ -6.22 x 10^14 kJ.

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