what is the ph of a solution prepared by adding 66.0 ml of 0.100 m hno3 to 89.2 ml of 0.26 m naoh?

The solubility of Mg(OH)2 in g/L in an aqueous solution buffered at pH = 8.60, we can use the Ksp expression for the compound and the relationship is 3.26*10^7 g/L..

Ksp (Mg(OH)2) = [Mg2+][OH-]^2 = 5.61 * 10^-12 M3

At pH = 8.60, the concentration of hydroxide ions can be calculated using the following equation:

pH = -log[OH-]

so [OH-] = 10^-8.60

We can then use the Ksp expression and the concentration of hydroxide ions to find the solubility of Mg(OH)2:

5.61 * 10^-12 = [Mg2+][OH-]^2

= Mg2+^2

= [Mg2+] (10^-17.2)

The solubility of Mg(OH)2 in molarity is [Mg2+] = Ksp/[OH-]^2

so [Mg2+] = 5.6110^-12 / (10^-17.2) = 5.6110^5 M

To convert the solubility from molarity to g/L, we can use the formula

g/L = molarity * molar mass

The molar mass of Mg(OH)2 = 58.32 g/mol

so the solubility of Mg(OH)2 in g/L is:

solubility = 5.61 * 10^5 * 58.32 = 3.26 * 10^7 g/L

So the solubility of Mg(OH)2 in an aqueous solution buffered at pH = 8.60 is approximately 3.26*10^7 g/L.

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Answer:

A. The equilibrium will shift towards the right, towards the formation of products

B. The concentration of hydrogen gas will decrease as more of it is used in the formation of products

C. Increasing the temperature at which the reaction is performed will increase the concentration of C2H4, the product of the reaction.

Explanation:

The given reaction is an exothermic reaction as it requires the addition of extra energy of about 52.4KJ in the form of heat for the reaction to proceed towards product formation.

According to L' Chtler principle, when an external constraint is applied to A given system in equilibrium, equilibrium position will shift so as to annul the effect ofnthe constraint imposed on the system.

Therefore, the answers tonthe questions above are given below as follows :

A. The equilibrium will shift towards the right, towards the formation of products in order to remove the effect of the additional heat since the forward reaction is endothermic.

B. The concentration of hydrogen gas will decrease as more of it is used in the formation of products .

C. Increasing the temperature at which the reaction is performed will increase the concentration of C2H4, the product of the reaction as the equilibrium will shift towards the right; formation of products.

Given :

An ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2 atm.

To Find :

What will be pressure of the gas if it is heated at 1000k and the volume becomes 50L.

Solution :

We know, by ideal gas equation :

\(Pv = nRT\)

Now, in the given question only their are two state and also their is no leakage so amount of gas is also constant.

So,

\(\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}\\\\\dfrac{2\times 34.4}{667} = \dfrac{P_2 \times 50}{1000}\\\\P_2 = \dfrac{2\times 34.4 \times 1000}{667 \times 50}\ atm\\\\P_2 = 2.06 \ atm\)

Therefore, the pressure of gas is 2.06 atm.

Answer:

Applied science is a discipline that is used to apply existing scientific knowledge to develop more practical applications, for example: technology or inventions. In natural science, basic science (or pure science) is used to develop information to explain phenomena in the natural world.

Answer:

• Because engineers apply science and its theories into practical situation

Take an example of;

→ A generator: When creating a generator, electromagnetic induction theorem is applied. [ self and mutual inductance ]

→ A plane: The wings are made in considerance of Bernoulli principle and viscous drag

\(.\)

C) You would expect to have 270 mL of lemonade.

The total volume is the sum of 20 mL of flavor crystals and 250 mL of water.

When you dissolve the flavor crystals into the water, the volume of the water does not change. The flavor crystals mix with the water and occupy the same space. Therefore, the total volume of the lemonade will be the sum of the volume of the flavor crystals (20 mL) and the volume of the water (250 mL), resulting in 270 mL of lemonade.

It's important to note that when substances dissolve in a solvent, they typically do not change the overall volume of the solution. The dissolved particles become dispersed throughout the solvent, occupying the same volume as the solvent itself.

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Magnesium carbonate breaks down into solid magnesium (MgO) & gaseous carbon dioxide in the aforementioned mechanism, which is a chemical property (CO2).

In these equations, chemical reactions are represented by chemical formulae and symbols. Chemical equations have two sides: the reactants are on the left, and the products are on the right.

Chemical equations represent the transformation of reactants into products in this process. Take the combination of iron (Fe) with sulfur (S) to create iron sulfide as an example. Fe(s) = S(s) + FeS (s) Iron and sulfur react, as indicated by the plus symbol.

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Answer:

alkalic sodium hydroxide (caustic soda) and hydrogen gas

Explanation:

Answer:

positively charged nucleons are 24

Explanation:

Given element:

           ₂₄⁵⁰ Cr

The superscript before the symbol of the atoms is mass number

The subscript before the symbol is the atomic number

  Cr is the symbol of the atom

Now,

Atomic number is the number of protons in an atom.

The protons are the positively charged particles in an atom.

For this specie, the positively charged nucleons are 24

Answer:

Atomic mass of Boron: 10.8 amu

Explanation:

Boron-10: (0.198)(10.013) = 1.98 amu

Boron-11: (0.802)(11.009) =  8.83 amu

Add them up: 1.98+8.83= 10.8 amu

The type of intermolecular forces would you expect to find in a pure liquid sample of carbon tetrachloride is London forces.

Although these attractive forces vary widely in strength, the intermolecular forces between small molecules are usually weaker than the intramolecular forces that bind atoms within molecules. All intermolecular forces that hold liquids together are called cohesive forces.

Molecules in solids are closer together than in liquids so the intermolecular attraction is less in liquids than in solids. Hydrogen bonds are caused by strongly electronegative atoms. They occur only between hydrogen and oxygen, fluorine or nitrogen, and are the strongest intermolecular forces. Acetone has no hydrogen bonding because there are no hydrogens directly bonded to oxygen to give it the necessary dipole strength.

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The molarity of Kristen's NaOH solution is approximately 2.50 M to two decimal places.

To calculate the molarity of Kristen's solution, we need to use the formula:

Molarity (M) = mole of solute / volume of solution in liters

First, we find the moles of NaOH dissolved in the solution. We can do this by dividing the given mass of NaOH by its molar mass. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H), which are approximately 22.99 g/mol, 16.00 g/mol, and 1.01 g/mol.

Molar mass of NaOH = 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 40.00 g/mol

Moles of NaOH = mass of NaOH / molar mass of NaOH = 39.53 g / 40.00 g/mol = 0.98825 mol

Next, we need to convert the volume of the solution from milliliters (ml) to liters (L). Since 1 L corresponds to 1000 ml, we can divide the given volume by 1000.

Volume of solution in liters = 395 ml / 1000 = 0.395 l

Now we can plug the values ​​into the molarity formula:

Molarity = 0.98825 mol / 0.395 L ≈ 2.50 M

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Answer:

1. Insulin

2. Keratin

Explanation:

Proteins are one of the four biological molecules found in living systems. They are polymeric molecules made up of monomeric units called AMINO ACIDS. Proteins perform a wide variety of functions in the body ranging from enzymatic functions to structural roles.

Two examples of proteins found in the body are keratin, insulin. Keratin is a structural protein located in the skin, hair and nails while insulin is an enzymatic protein that aids in digestion.

In this situation, wash the separating funnel with soap and water once more before using it for the subsequent experiment and rinse the funnel with acetone into a waste container.

Separating funnels are employed in the extraction process and must be free of contaminants that could reduce the yield of the extraction. The funnel could be placed in a desiccation after being cleaned and rinsed to allow the water on the body to dry before being used for the following extraction procedure. Washing laboratory equipment before use irrespective of its state (whether it is clean or not) contributes to standard laboratory practices.

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The jumper's potential energy at a height of 1524 meters above the ground is equal to 836,371.2Joules.

Given the following data:

Mathematically, potential energy is given by this formula:

\(P.E = mgh\)

Where:

Substituting the given parameters into the formula, we have;

\(P.E = 56 \times 9.8 \times 1524\)

P.E = 836,371.2Joules.

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Answer:

Liquids

Explanation:

They have a certain volume but they take the shape of their container

Lead is more ductile than iron. The correct option is A. Lead is more ductile than iron

From the question, we are to determine the statement which is true

First, we will define the term Young's modulus

Young's modulus is a measure of the stiffness of an elastic material. It is also given as the ratio of stress to strain. That is,

\(Young's\ modulus = \frac{Tensile\ stress}{Tensile\ strain}\)

The greater the modulus, the stiffer the material.

Materials with low Young's modulus tend to be ductile and materials with high Young's modulus tend to be brittle

Since the Young's modulus value for iron is higher than that of lead, then iron is stiffer than lead.

Thus, lead is more ductile than iron. The correct option is A. Lead is more ductile than iron

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Answer:

Carbon monoxide (CO)—a colorless, odorless, tasteless, and toxic air pollutant—is produced in the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, oil, coal, and wood. The largest anthropogenic source of CO in the United States is vehicle emissions.

Explanation:

Hope this helps- good Luck! ^w

CsBr has a larger lattice energy than LiCl because Cs+ has a larger ionic radius and a greater charge than Li+.

The lattice energy of an ionic compound is determined by the strength of the electrostatic attraction between the ions in the solid crystal lattice. This attraction is influenced by the charges on the ions and the distance between them. The larger the charge on the ions, the greater the lattice energy, and the smaller the distance between them, the greater the lattice energy.

Br- also has a greater charge density than Cl-, making the electrostatic attraction between Cs+ and Br- stronger than that between Li+ and Cl-. Therefore, CsBr has a higher lattice energy than LiCl.

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Answer:

0.3M

Explanation:

Find the amount concentration of the anion in a 0.100 mol/L solution of Al(CIO3)3.

FOR EVERY MOLE OF Al(CIO3)3., THERE ARE 3 MOLES OF CIO3.

SO IN A 0.00m SOLUTION, THE CONCENTRATION OF THE ANION

ClO3 IS 3X0.1M = 0.3M

.

D: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease.​



The use of fossil fuels and nuclear fuels are used in the extraction of pure water from seawater as it helps to desalinate the water using different types of techniques.

This is referred to as a material which is used in nuclear power stations to produce heat to power turbines.

Small and medium sized nuclear reactors are mostly used during the process of desalination. This is done by the cogeneration of electricity using low-pressure steam from the turbine and hot seawater feed from the final cooling system in this scenario.

The fossil fuel also ensures that electricity is used to power the turbine which is used in the process thereby making it an important aspect in the extraction of pure water from seawater and is the correct choice.

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The Earth's atmospheric CO2 concentration was around 280ppm before human activities, but since the Industrial Revolution, burning fossil fuels has increased it to above 400ppm, well outside the range.

The concentration of CO2 in the Earth's atmosphere prior to significant human influences was 280ppm.

Before human activities, such as burning fossil fuels, deforestation, and industrial processes, the concentration of carbon dioxide in the atmosphere was relatively stable for thousands of years. This pre-industrial concentration of CO2 was around 280 parts per million (ppm).

To put it into perspective, 280ppm means that for every million molecules of air, around 280 of them were CO2 molecules. This level was maintained through a balance between natural sources of CO2, like volcanic activity and respiration, and natural sinks, such as photosynthesis and ocean absorption.

Since the Industrial Revolution, the burning of fossil fuels has significantly increased the concentration of CO2 in the atmosphere. Currently, the concentration is above 400ppm, which is considered to be well outside the range seen in the past 800,000 years.

In summary, the concentration of CO2 in the Earth's atmosphere prior to significant human influences was approximately 280ppm.

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The marginal density function of X and Y is 1 and thus they are probability density functions and the probability of the conditions in (c) and (d) is 0.2 and 0.8 respectively.

A probability is a number that expresses the likelihood or chance that a given event will occur. Probabilities can be stated as proportions ranging from 0 to 1, as well as percentages ranging from 0% to 100%.

A probability density function, also known as the density of a continuous random variable in probability theory, is a function whose value at each given sample in the sample space may be read as offering a relative likelihood that the random variable's value will be near to that sample. Probability density functions are statistical measures that are used to predict the outcome of a discrete value. The probability density function is nonnegative all the way through, and the area under the entire curve is equal to one.

a) The marginal density of X is

\(f_X (x) = \int\limits^x_0 {f_{X,Y} (x,y)} \, dx = \int\limits^x_0 {2} \, dx = 2x\)

If it is a pdf, then

\(\int\limits^1_0 {f_X(x)} \, dx = 1\)

\(\int\limits^1_0 {2x} \, dx = x^2 |_0^1 = 1\)

Since integral is 1, marginal density function of X is pdf.

b) The marginal density of Y is

\(f_Y (y) = \int\limits^y0 {f_{X,Y} (x,y)} \, dy = \int\limits^y_0 {2} \, dy = 2y\)

If it is a pdf, then

\(\int\limits^1_0 {f_Y(y)} \, dy = 1\)

\(\int\limits^1_0 {2y} \, dy = y^2 |_0^1 = 1\)

Since integral is 1, marginal density function of Y is pdf.

c)

       \(P (x < 0.2,y > 0.5) = \int\limits^1_{0.5}\int\limits^{0.2}_0 {f_{X,Y} (x,y) \, dx \, dy = \int\limits^1_{0.5}\int\limits^{0.2}_0 2dxdy\)

       \(= \int\limits^1_{0.5} [2x]_0^{0.2}dy = 0.4[y]_{0.5}^1 = 0.4 (1 - 0.5) = 0.2\)

d)

      \(P (x < 0.8,y > 0.5) = \int\limits^1_{0.5}\int\limits^{0.8}_0 {f_{X,Y} (x,y) \, dx \, dy = \int\limits^1_{0.5}\int\limits^{0.8}_0 2dxdy\)

      \(= \int\limits^1_{0.5} [2x]_0^{0.8}dy = 1.6[y]_{0.5}^1 = 1.6 (1 - 0.5) = 0.8\)

The complete question is:

A chemical system that results from a chemical reaction has two important components in a blend among others. The joint distribution that describes the proportion X and Y of these two components is given by f(x,y) = 2 for 0 < x < y < 1 and f(x,y) = 0 otherwise. (a) Find the marginal density function of X and verify if it is a pdf. (b) Find the marginal density function of Y and verify if it is a pdf. (c) Find the probability that the component proportions produce results X < 0.2, Y > 0.5. (d) Find the probability that the component proportions produce results X < 0.8, Y > 0.5.

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The vapor pressure of the solution will be less than 22.4 mm Hg.

When a non-volatile solute such as urea is dissolved in a solvent like water, the vapor pressure of the resulting solution decreases. This is due to the fact that the solute molecules occupy space at the surface of the solvent, thus reducing the number of solvent molecules that can escape into the vapor phase. The vapor pressure of the solution can be calculated using Raoult's law, which states that the vapor pressure of a solution is equal to the mole fraction of the solvent multiplied by the vapor pressure of the pure solvent. Using this law and the given values, we can find that the mole fraction of water in the solution is 0.994, and hence the vapor pressure of the solution will be 22.2 mm Hg.

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Answer:

you will get 17.983 g of lithium for every 100 g of lithium phosphate.

Explanation:

69.7%  is the percent by mass of Lithium in  Li\(_3\)PO\(_3\). A percent is obtained by multiplying the result by 100.

One approach to show the concentration for an element within a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total weight of the combination by the mass of each component and multiplying the result by 100%. The mass percent is calculated by dividing the mass that contains the compound and solute by the mass for the element or solute.

99.795g/mol = molar mass of  Li\(_3\)PO\(_3\)

6.94g/mol = molar mass of Li

mass percentage of Li=(molar mass of Li/molar mass of Li\(_3\)PO\(_3\))×  100

=(6.94/99.7)×  100

=69.7%

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Answer:

Explanation:

XO3

X + 3x16 = 80

x= 32  atomic mass for sulfur

SO3

Answer:

it is a infectiousr bacterial disease characterized by the growth of nodules(tubercles) in tissues especially the lungs

The Case of the Putrid Pond Problem Statement:

1. Brainstorming generated solutions: debris collection nets, manual cleaning, water jets, filtration upgrades, waste management improvements, and regular maintenance.

2. Fishbone diagram: categorizes causes (inflow system, waste management, pond maintenance, environmental factors) and solutions (screening mechanisms, enhanced cleaning schedules).

(a) Devise ways to solve the above-mentioned problem through all the FOUR (4) brainstorming methods and describe it in detail:

1. Brainwriting: In this method, each team member writes down their ideas on sticky notes or a shared document without discussing them with others. The ideas can then be compiled and analyzed collectively. Some possible solutions through brainwriting could include:

  - Deploying a large floating debris collection net or barrier around the perimeter of the pond to capture and remove floating objects.

  - Implementing regular manual cleaning by workers using long-handled nets or other specialized tools.

  - Introducing a system of water jets or pumps to create a flow within the pond, pushing floating objects towards a collection area for easy removal.

2. Reverse Brainstorming: In reverse brainstorming, instead of generating solutions, the focus is on identifying potential causes or factors that contribute to the problem. These causes can then be addressed to find solutions. Possible causes identified through reverse brainstorming might include:

  - Inadequate filtration or screening mechanisms in the inflow system, allowing unwanted objects to enter the pond.

  - Lack of proper waste management practices upstream, leading to the accumulation of debris in the pond.

  - Inefficient or infrequent monitoring and maintenance of the pond, allowing the problem to persist.

3. Starbursting: This technique involves asking specific questions about the problem to prompt idea generation. Questions related to the Putrid Pond problem could be:

  - How can we prevent unwanted floating objects from entering the pond in the first place?

  - What alternative methods can be used to remove floating objects without covering the pond?

  - Are there any environmentally friendly solutions that can be implemented?

4. Mind Mapping: Mind mapping is a visual brainstorming technique that involves creating a diagram with the main problem in the center and branching out ideas around it. Some ideas for solving the problem of the Putrid Pond could include:

  - Installing automatic skimmers or surface vacuum systems to continuously remove floating debris.

  - Implementing regular maintenance schedules for inspecting and cleaning the pond to prevent accumulation.

  - Introducing biological treatment methods that can break down organic matter and prevent foul odors.

(b) A fishbone diagram, also known as a cause-and-effect or Ishikawa diagram, can help organize the potential causes and solutions identified through brainstorming. Here is a description of the fishbone diagram for the Putrid Pond problem:

The main problem, "Unwanted Floating Objects in the Pond," is written in the center of the diagram. The diagram branches out into different categories representing possible causes, such as "Inflow System," "Waste Management Practices," "Pond Maintenance," and "Environmental Factors." Each category contains the specific causes identified through brainstorming. For example, under "Inflow System," causes could include "Inadequate Filtration" and "Lack of Screening Mechanisms." Similarly, under "Pond Maintenance," causes could include "Insufficient Cleaning Procedures" and "Lack of Monitoring."

From the identified causes, further branches are created to suggest possible solutions. These solutions can be linked to the specific causes they address. For instance, under "Inflow System," a solution could be "Upgrading Filtration Systems" or "Implementing Effective Screening Mechanisms." Under "Pond Maintenance," solutions might include "Establishing Regular Cleaning Schedules" or "Enhancing Monitoring Practices."

The fishbone diagram visually represents the cause-and-effect relationships between the problem, its causes, and potential solutions, providing a structured overview of the brainstormed ideas.

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The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure.

Answer:

The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure

Explanation:

The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure