How do the concentrations of Pb2+ and 52-change when K S is added to a saturated solution of PbS? The added K S causes the concentration of S2 to increase and the concentration of Pb2+ to decrease via formation of more Pbs by the common ion effect. The added K S causes the concentrations of s2 and the concentration of Pb2 to decrease via formation of more Pbs by the common ion effect. The added K S causes the concentration of S2- and the concentration of Pb2 to increase via formation of more Pbs by the common ion effect. The added K S causes the concentration of S2 to decrease and the concentration of Pb2 to increase via formation of more Pbs by the common ion effect.

The molecular formula for the substance with a molar mass of 1644.28 g/mol and an empirical formula of Bg₂DGr₃ is Bg₁₀D₅Gr₁₅.

To determine the molecular formula, we need to calculate the molecular weight of the empirical formula, which can be done by adding up the molar masses of the atoms in the empirical formula.

The molar mass of Bg₂DGr₃ is:

(2 x 10.81 g/mol) + (3 x 2.01 g/mol) + (3 x 72.63 g/mol) = 328.50 g/mol

Next, we can divide the given molar mass by the empirical formula mass to get the ratio between the empirical formula and the molecular formula:

1644.28 g/mol ÷ 328.50 g/mol = 5

This tells us that the molecular formula contains 5 times as many atoms as the empirical formula. To find the molecular formula, we simply multiply the subscripts in the empirical formula by 5:

Bg₁₀D₅Gr₁₅

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Answer:

its a dawg sorry if im wrong

.ANSWER

STEP-BY-STEP EXPLANATION

From the question given, you were asked to name a compound

Cobalt (II) Bromide Heptahydrate

The heptahydrate in the compound means it has 7 molecules of water

Therefore, the chemical formula can be written below as

Answer and Explanation:

The lesson about the uniqueness of the earth allowed me to realize that the earth is the only planet that has drinking water and oxygen, thus allowing the existence of life on the planet and showing that we would not fully survive on another planet.

The lesson also shows that the earth is the only planet where rotation is capable of causing seasonal differences in different parts of the globe. This is important for several things, including food production and plant growth.

Another factor that shows the uniqueness of the land is its favorable temperature for life, allowing us to have water and to be able to live outdoors, for example. This factor is worrying, since the holes in the ozone layer have caused changes in this temperature.

I was also able to learn about the gravity of the earth, which is the only thing that allows us to do all the activities we do and allows us not to be launched into space. In addition, gravity has a strong influence on seas and agriculture.

Finally, I was able to learn about the tectonic plates, which provide the movement of our crust and influence in several geological processes.

Answer:

mabye C at least if its not right sorry .

The fluoride content in acidulated phosphate fluoride is approximately 1.23 percent.

Acidulated phosphate fluoride (APF) is a commonly used dental product for the prevention of tooth decay. It contains a specific concentration of fluoride, which is an essential component for its effectiveness.

The fluoride content in APF is approximately 1.23 percent. This means that for every 100 parts of APF, 1.23 parts are fluoride. This concentration is carefully formulated to provide optimal dental benefits while ensuring safety and effectiveness.

The fluoride in APF acts by remineralizing tooth enamel, making it more resistant to acid attacks from bacteria and acids in the mouth. It also inhibits the growth of bacteria that contribute to tooth decay.

It is important to note that the fluoride content in dental products may vary slightly depending on the specific brand or formulation. Therefore, it is always recommended to follow the instructions provided by the manufacturer and consult with dental professionals for proper use and dosage.

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The bond between the nitrogen and the amide group in distamycin would be cleaved by acid hydrolysis.

Distamycin is a peptide antibiotic that has demonstrated antiviral, antibiotic, and antitumor activity. It does this by binding to the minor groove of DNA.Acid hydrolysis is a process in which molecules are broken down in the presence of an acid. Acid hydrolysis is widely used to cleave certain types of chemical bonds.

When treated with acid hydrolysis, the bonds that hold the molecule of distamycin are broken, leading to the production of its derivatives.To identify the bonds that would be cleaved by acid hydrolysis in distamycin, we must first examine its chemical structure. Distamycin has two aromatic rings, a nitrogen-containing heterocycle, and an amide-containing tail. In the presence of acid, the amide bond is cleaved, leading to the production of two smaller peptides and an acid. To place a line through each bond that would be cleaved by acid hydrolysis, we can isolate the amide bond in the structure.

Thus, the amide bond is located between the nitrogen-containing heterocycle and the amide-containing tail. Therefore, the bond between the nitrogen and the amide group is the one that would be cleaved.

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Answer:  Time = Distance ÷ Speed

Your classmate's statement is not entirely correct. Both acids and bases can be dangerous depending on their concentration and strength.

Acids are substances that release hydrogen ions (H+) when dissolved in water. Bases, on the other hand, are substances that release hydroxide ions (OH-) when dissolved in water.
Both strong acids and strong bases can cause chemical burns, damage surfaces, and harm living tissues. It is essential to handle both types of substances with care and follow safety guidelines when working with them in a laboratory setting.

Acids can cause severe chemical burns, respiratory problems, and even death if ingested in high concentrations. Some common examples of strong acids that can be dangerous include sulfuric acid, hydrochloric acid, and nitric acid. However, even weak acids like acetic acid (found in vinegar) can cause harm if ingested in high concentrations.

Bases can also be dangerous if ingested or if they come into contact with the skin or eyes. Strong bases such as sodium hydroxide (lye) and potassium hydroxide can cause severe chemical burns and eye damage. Even household cleaning products that contain weaker bases like ammonia can be harmful if ingested or inhaled in large amounts.

It is important to handle both acids and bases with care and to follow appropriate safety procedures when using them. This includes wearing appropriate protective equipment, avoiding ingestion or inhalation, and handling them in well-ventilated areas.

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No, the classmate is not completely correct. Acids are substances that release hydrogen ions (H+) when dissolved in water. Bases, on the other hand, release hydroxide ions (OH-) when dissolved in water. Both strong acids and strong bases can be corrosive and cause chemical burns when they come into contact with skin or other materials.

While some acids can be dangerous and corrosive, not all acids are dangerous. For example, vinegar is a weak acid and is safe to use in cooking. Similarly, while many bases are not dangerous, some can still be harmful if not handled properly. For instance, bleach is a strong base and can cause skin irritation if it comes into contact with skin. Therefore, it is important to handle all chemicals with caution and follow proper safety protocols.
It's essential to handle both acids and bases with caution and use proper safety measures, such as wearing gloves and eye protection, when working with them.

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The answer for tha is D

By subjecting the two compounds to Jones reagent, you can observe the difference in their reactivity and determine the compound that undergoes oxidation (4-methyl-3-penten-1-ol) and the one that does not (1-methoxy-3-methyl-2-butene).

To distinguish between 1-methoxy-3-methyl-2-butene and 4-methyl-3-penten-1-ol, you can use an oxidizing agent that can react selectively with the alcohol group present in 4-methyl-3-penten-1-ol.

One suitable reagent for this purpose is Jones reagent (a mixture of chromic acid and sulfuric acid). Jones reagent is a strong oxidizing agent that can convert alcohols to their corresponding carbonyl compounds (aldehydes or ketones).

Here's what would happen with each compound:

Methoxy-3-methyl-2-butene does not have an alcohol group, so it would not react with Jones reagent.

4-Methyl-3-penten-1-ol has an alcohol group, and it can be oxidized by Jones reagent to form the corresponding aldehyde or ketone. The specific product obtained would depend on the reaction conditions.

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A partial pressure of a gases inside the reaction mixture depicted above reached the levels based on (a) more at a certain point because the forward reaction's rate was greater than its reverse reaction's rate.

A mixture is a substance created by mixing two or more distinct ingredients without causing a chemical reaction to take place. Usually, a combination may be broken down again into its constituent parts. When two or more substances come together physically rather than chemically, a mixture is created. Basic characteristics of a mixture: The components of a combination can be easily separated. The components each preserve their original properties. The components' relative weights vary.

A combination of organic substances known as crude oil (mainly hydrocarbons) Seawater is a combination of different salts and water. An amalgam of different gases, including oxygen, carbon dioxide, nitrogen, argon, neon, etc., is called air. A blend of colored dyes is called ink. Carbon, potassium nitrate, and sulfur are the main ingredients in gunpowder.

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Answer:

The answer is Ionization energy.

Explanation:

Ionization Energy. The ionization energy tends to increase as one moves from left to right across a given period or up a group in the periodic table.

Answer:

I dont know what that is I just need points lol sorry

Answer:

1. metaphase

2. prophase

3. telophase

4. interphase

5. interphase

6. interphase

7. anaphase

8. interphase

(4,5,6,8 I'm not sure)

Real gases behave most like ideal gases under conditions of high temperature and low pressure. Option 2 is correct.

This is because at high temperatures, the kinetic energy of gas molecules increases, causing them to move faster and collide more frequently, which reduces the intermolecular forces between the gas molecules. At low pressures, the gas molecules are farther apart and the intermolecular forces are weaker, allowing the gas molecules to move more freely and behave more like an ideal gas.

At high pressures and low temperatures, the gas molecules are closer together and the intermolecular forces are stronger, causing deviations from ideal gas behavior. Hence the correct option is 2.

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Potential energy portion for F₂ molecule must be more downwards, this is the error with the student's sketch for F₂(g).

ΔH is commonly used to represent the bond energy. Bond energy is measured in kcal/mol or kiloJoule/mol, abbreviated as kJ/mol. It should be observed that the bond energy is always positive. The positive indication is due to the fact that energy is given to break the chemical bonds.

When a chemical reaction happens, molecular bonds are broken and new bonds are created, resulting in the formation of new molecules. For example, two water molecules' bonds are broken to generate hydrogen and oxygen. Breaking a bond always requires energy, often known as bond energy.

As, it is shown in the graph that I-I bond energy than F-F bond energy, so here for I₂, more energy will be released. Thus, during the bond formation between two iodine atoms more energy will be released than F₂ molecules. So, there is an error in the sketch for F₂ molecule drawing, it's lower portion mean potential energy portion must be more downwards.

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The complete question is as follows:

While investigating the properties of other diatomic molecules, the student finds the diagram below, which shows the potential energy of two iodine atoms versus the distance between their nuclei. The student also finds that the I-I bond energy is slightly less than the F-F bond energy. The student incorrectly sketches the potential energy curve for two fluorine atoms, shown by the dotted line in the diagram. 200 100+ - - 600 Potential Energy (kJ/mol) 0 200 300 1100 1 400 500 700 800 100+ -200 Internuclear Distance (pm) (h) Explain the error with the student's sketch for F2(g).

Answer:125ml - volume of phosphoic acid

Explanation:

The equation of the reaction is

H3PO4 + 3 NaOH ---> Na3PO4 + 3H2O

Such that I mole of H3PO4 reacts with 3 moles of  NaOH to produce the products above.

Given that

M1= Molarity of phosphoric acid = 7.48x10^-2 M

n1= number of moles of phosphoric acid = 1

V1=? ml

M2= Molarity  of Sodium hydroxide =0.244 M

V2= volume of sodium hydroxide= 115ml

n2=number of moles of sodium hydroxide = 3

Using the Dilution equation formulae,

M1V1/n1 = M2V2/n2

7.48X10-2 x V1 /1= 0.244M x 115ml/3

V1=0.244Mx115mlx1/0.0748M X 3

V1= 28.06/0.2244= 125.04ml

V1=125.04ml rounded up to 125ml

Answer: the moon and sun

Explanation:

Answer:

Explanation:

SANA PO MAKATULONG PO YUNG SAGOT NA BINIGAY KO

Answer:

I just need points

Explanation:

whegehhwjwjwhehebebejeuhebehejejbebe

Answer:

hope it helps..

Explanation:

Number of protons

More information: The atomic number is used to identify an element, and the atomic number is the number of protons in the nuclei of an element. Every element has its own unique number of protons, and therefore, atomic number.

The relative amounts of products and reactants present during a reaction at a specific time are measured by the reaction quotient (Q). The numerical value for Q for this reaction is 0.096.

The reaction quotient is a quantity that, given a specific point in time, provides a relationship between the quantities of reactants and products. The ratio of the molar concentrations (or activities) of the products to those of the reactants provides the clearest definition of the reaction quotient.

The reaction is:

PCl₅ (g) + Cl₂ (g) → PCl₃ (g)

Q = (0.21 atm × 0.41 atm) / (0.89 atm)

Q = 0.096

Kp = 3.8

To determine whether the reaction mixture is at equilibrium, compare Q to the equilibrium constant (Kp) for the reaction at 450 K.

If Q = Kp, the reaction is at equilibrium.

If Q < Kp, the reaction will proceed to the right (toward products).

If Q > Kp, the reaction will proceed to the left (toward reactants).

Here Q < Kp, the reaction will proceed to the right.

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Answer:

Question 4 is 291.0346

Explanation:

Answer:

About 28.9 kJ.

Explanation:

Recall the formula for specific heat:
\(\displaystyle q = mC\Delta T\)

Where q is the amount of heat released, m is the mass of the substance, C is its specific heat, and ΔT is the change in temperature.

Therefore, by substitution, we have that:
\(\displaystyle \begin{aligned} q & = (625\text{ g})\left(\frac{0.900 \text{ J}}{\text{g-$^\circ$C}}\right)\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right) \left(82.1^\circ\text{C}-30.7^\circ \text{C}\right) \\ \\ & = (625\text{ g})\left(\frac{0.900 \text{ J}}{\text{g-$^\circ$C}}\right)\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right)(51.4^\circ\text{C}) \\ \\ & = 28.9\text{ kJ}\end{aligned}\)

In conclusion, about 28.9 kJ of energy is needed.

Answer:the number of electrons is equal to the number of protons in a neutral atom that is. In a cation or anion atom you either gain or lose electrons. Let’s say it’s a cation +3 you lose 3 electrons. Now let’s say it’s an Anion -3 you gain 3 electrons. Hope this helps.

Explanation:

The nurse teaches a client about the dangers of using sodium bicarbonate regularly. The effect of sodium bicarbonate is the nurse trying to prevent will be Sodium bicarbonate use over an extended period of time may result in sodium and water retention together with systemic alkalosis.

Feeling thirsty, experiencing stomach cramps, and experiencing gas are typical sodium bicarbonate side effects. You could be more vulnerable to adverse reactions that are more severe if you have certain medical conditions, such as high blood pressure, heart failure, and especially kidney disease.

An antacid was using to treat acid indigestion and heartburn is also sodium bicarbonate. In some circumstances, your doctor may also advise you to take sodium bicarbonate to reduce the acidity of your blood or urine. Ask your doctor as well as a pharmacist for more details if you're interested in using this drug for any other conditions.

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After assigning electrons based on the Electronegativity value, determine how many (if any) lone pair electrons are on that atom, and add two values together.

The electronegativity of an element increases with oxidation state of the element.

oxidation numbers for covalent bonds:

Although covalent bonds donot result in charges, oxidation states are still useful.

They label hypothetical transfer of electrons if substance were ionic.

Determining oxidation states of atoms in a covalent molecule is very important when analyzing "redox" reactions

To determine Oxidation Number for a non-metal in covalent compounds or polyatomic is the difference between the Group Number and total number of electrons assigned to that atom.

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Answer:

1. 254 milli

2. 5.3 centi

Explanation:

254 milli = 25.4 centi

53 milli = 5.3 centi

Answer:70%

Explanation:

Answer:

71%

Explanation:

71% of the earth is covered by water and oceans hold about 96 percent of the water