What is the relationship between pH and pOH?

Answer:

i think the answer is D)

but u should ask the another person too:)

Answer:

partial pressure of gas D Pd = 15.5 kPa

Explanation:

As per the Dalton's law of partial pressure, in a mixture, pressure exerted by each gas when summed gives the total partial pressure exerted by mixture.

P(Total) = P1+P2+P3.....

Given P(Total) = 35.7 kPa

Partial pressure of gas A Pa = 7.8 kPa

Partial pressure of gas B Pb = 3.7 kPa

Partial pressure of gas C Pc =  8.7 kPa

There, Partial pressure of gas D Pd = P(Total) -(Pa+Pb+Pc)

Pd = 35.7-(7.8+3.7+8.7) = 35.7-20.2 kPa = 15.5 kPa

Therefore, partial pressure of gas D Pd = 15.5 kPa

Answer:

See below!

Explanation:

Chlorine is very electronegative, meaning that it will pull electrons, or negativity toward itself.  When it pulls the negativity towards itself, the chlorine becomes partially negative and the carbon becomes partially positive.  Because of this, the compound is polar.

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

The expression to be rearranged K = [CO][Cl₂] [COCI₂]  are x = 0.327 or x = 339.

The expression to be rearranged K = [CO][Cl₂] [COCI₂] is:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²

We will expand and simplify the expression:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²(0.156)² + (0.156)(x) - (x)(0.156) - (x)² (0.263 + x)

= 5.00 × 10⁻²(0.156)² - (0.263)(0.156)(x) - (0.156)(x) + (0.263)(0.156)(x) + x²(0.263 + x) - 5.00 × 10⁻² = 0

After simplifying:

-0.0132302 x² - 0.001002 x + 0.0014256 = 0

This is in the form ax² + bx + c = 0 where a = -0.0132302, b = -0.001002 and c = 0.0014256

Using the quadratic formula, we have:

\(\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]\)

Substituting values, we get:

\(\[x = \frac{-(-0.001002) \pm \sqrt{(-0.001002)^2-4(-0.0132302)(0.0014256)}}{2(-0.0132302)}\]\)

Solving, we get:x = 0.327 or 3.39 × 10²

Therefore, the solutions are x = 0.327 or x = 339.

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Answer:

24 oral syringes

Explanation:

Answer:

Color. I thinkkk.

Phyiscal properties are defined as properties that can be measured or observed without changing the chemical nature of the substance.

Some examples of phsyical properties are:

- Color

- Density

- Volume

- Mass

- Boiling or Melting Points

When the surface water is warm, the storm sucks up heat energy from the water, just like a straw sucks up a liquid. This creates moisture in the air. ... And the warmer the water, the more moisture is in the air. And that could mean bigger and stronger hurricanes.

In some ocean basins, the intensification of hurricanes over time has been linked to rising ocean temperatures. Since 1970, sea surface temperatures worldwide have warmed by about an average of 0.1°C per decade. This warming is especially pronounced in the North Atlantic basin.

Stay seggsy.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Yes, radioactive decay will change the identity of an atom.

Explanation:

This is because the radioactive decay involves the emission of particles that change the number of protons in the nucleus. The number of protons is what determines the identity of the atom.

Answer:

in most instances, the atom changes its identity to become a new element

Explanation:

when mtbe (shown) is reacted with hbr, carbons a and b will undergo nucleophilic substitution to yield two alkyl halides then by SN2 mechanism each c-o bonds will be cleaved.

When MTBE (methyl tert-butyl ether) is reacted with hydrogen bromide (HBr), the two C-O bonds in the molecule are expected to undergo an S N 2 substitution mechanism. This is because the reaction conditions are favorable for a bimolecular, concerted mechanism, where the nucleophilic (HBr) and substrate (MTBE) interact with each other to produce the products.

In the S N 2 mechanism, the C-O bonds in MTBE are cleaved via backside attack by the nucleophile, HBr. This involves the simultaneous formation of a new C-Br bond and breaking of the existing C-O bond. The attack takes place in a stereospecific manner, so that the orientation of the substrate and nucleophile determines the stereochemistry of the products. The S N 2 mechanism is typically favored under conditions where the substrate is a good leaving group and the nucleophile is a strong base.

In summary, both of the C-O bonds in MTBE are expected to be cleaved via an S N 2 mechanism when reacting with HBr.

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Answer:

the answer is the third figure from left

The empirical formula of the compound, given it contains 19.3% Na, 26.9% S, and 53.8% O is NaSO₄

The following paameters were obtained from the question:

The empirical formula of the compound can be obtained as follow:

Divide by their molar mass

Na = 19.3 / 23 = 0.839

S = 26.9 / 32 = 0.840

O = 53.8 / 16 = 3.3625

Divide by the smallest

Na = 0.839 / 0.839 = 1

S = 0.840 / 0.839 = 1

O = 3.3625 / 0.839 = 4

Thus, the empirical formula of the compound is NaSO₄

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Complete question:

A compound is 19.3% Na, 26.9% S, and 53.8% O. Its formula mass is 238 g/mol. What is the empirical formula? Show your work in a neat and logical manner.

The orange line on the graph to the right best represents the data table, as it closely aligns with the given data points in the 2-column table with 6 rows. The table indicates the relationship between temperature in Kelvin (column 1) and volume in cubic centimeters (column 2).

The orange line starts at a temperature of 275 Kelvin and a volume of 0.73 cubic centimeters and extends through the other data points.

As the temperature increases, the volume also increases. This relationship is reflected in the data table, whereas the temperature increases from 276 Kelvin to 371 Kelvin, the volume increases from 0.72 cubic centimeters to 0.98 cubic centimeters.

Therefore, the orange line is the best fit for the data in the 2-column table.

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At the end of the experiment you will be assessing the purity of your aspirin by measuring its absorbance at 525 nm. If the absorbance measurement is found to be 0. 040 then the % salicylic acid impurity in your aspirin will be 7.8 percent.

The sample solution's absorbance (A), as specified in the question, is 1.07. Beer's law is applied to determine the aspirin concentration, which is A = ebc.

Here, e is the extinction coefficient, which, according to the standard value for salicylic acid, is equal to 139.322 M-1cm-1, and b is the path length, which is equal to 1 cm. Now that we have our values,

A = ebc

c = A / (eb)

c = 1.07 / (139.322 × 1)

c = 0.00768 M

It is now necessary to compare the value of concentration determined with the concentration of aspirin previously given in order to calculate the percent salicylic acid in the sample.

Aspirin's initial concentration, which is specified in the query, is 0.02 grammes. Aspirin has a molar mass of 240 g/mol.

Consequently, the aspirin molecules will be,

0.02 / 240 = 8.33 × 10^-5 moles  

The final volume of the diluted solution given is 10 ml or 0.01 liters.  

The molarity of aspirin in the diluted solution will be,  

c1 = 8.33 × 10^-5 / 0.01 = 8.33 × 10^-3 M or 0.00833 M

Now, the percent of salicylic acid in the product will be,  

c1 - c / c1 × 100

(0.00833 - 0.00768) / 0.00833 × 100 = 7.8 %

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Answer:

Explanation:

The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

The balanced equation is SnO₂ + 5/2 H₂ → Sn + 3/2 H₂O.

To balance the equation: SnO₂ + H₂ → Sn + H₂O, we need to ensure that the number of atoms on both sides of the equation is equal.

Start by balancing the atoms of elements that appear in only one compound on each side. In this case, we have tin (Sn) and oxygen (O). We have one Sn on the right side, so we need to balance it with a coefficient of 1 on the left side.

Next, balance the oxygen atoms. We have two O atoms in SnO₂ and one O atom in H₂O, giving us a total of three O atoms on the left side. To balance this, we place a coefficient of 3/2 in front of H₂O, resulting in 3/2 H₂O.

Now, balance the hydrogen (H) atoms. We have four H atoms in H₂ and one H atom in 3/2 H₂O, giving us a total of 5/2 H atoms on the left side. To balance this, we place a coefficient of 5/2 in front of H₂, resulting in 5/2 H₂.

The balanced equation is: SnO₂ + 5/2 H₂ → Sn + 3/2 H₂O.

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Answer:

In a solution, the solute particles that are in the solvent are evenly mixed and so small that you can't see them. In a suspension, the pieces of solute are large and can be seen floating throughout the solvent. For example, dust floating through the air is a suspension.

The compound that will not be soluble in water is BaSO₄ (barium sulfate). Option B is correct.

BaSO₄ (barium sulfate) is the compound that is not soluble in water. Solubility in water depends on the nature of the compound and the interactions between its constituent ions and water molecules. In the case of BaSO₄, the strong electrostatic forces of attraction between the barium (Ba²⁺) and sulfate (SO₄²⁻) ions result in a very low solubility in water. The solubility rules dictate that most sulfates are soluble in water, but barium sulfate is an exception.

It forms a solid precipitate when barium ions and sulfate ions come into contact in an aqueous solution. On the other hand, K₂S (potassium sulfide), NaNO₃ (sodium nitrate), and LiOH (lithium hydroxide) are all soluble in water and will dissociate into their constituent ions when dissolved, resulting in a homogeneous solution. Option B is correct.

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The correct answer to the question is: A) increase, decrease

The first ionization energies of the elements increase as you go from left to right across a period of the periodic table, and decrease as you go from the bottom to the top of a group in the table.

1. Going from left to right across a period, the atomic number increases, which means there are more protons in the nucleus. This results in a stronger attraction between the positively charged nucleus and the negatively charged electrons. As a result, it becomes harder to remove an electron, requiring more energy, and therefore the first ionization energy increases.

2. Going from the bottom to the top of a group, the atomic size decreases. This is because the number of energy levels or shells decreases, and the electrons are closer to the nucleus. As the distance between the nucleus and the outermost electrons decreases, the attractive force between them increases. Consequently, it becomes easier to remove an electron, requiring less energy, and therefore the first ionization energy decreases.

Therefore, the correct answer to the question is:

A) increase, decrease

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1. Constellations are group of stars that form pattems in the night sky

2. Ursa Major, Cassiopeia, and Orion are some common constellations.

3. Stars are used to tell directions and time, predict weather, and to serve as birth sign.

Lattice energy refers to the energy released when ions join together to form a solid compound. The amount of lattice energy produced determines the strength of the ionic bond.

The greater the lattice energy, the stronger the bond, and the harder it will be to separate the atoms. Lattice energy can be influenced by many factors, including the charge on the ions, the size of the ions, and the arrangement of the ions.

The order of increasing magnitude of lattice energy is CaO < MgO < SrS.

The reason for this order can be explained by considering the size and charge of the ions. The smaller the ions, the closer they can be packed together, and the greater the lattice energy. Similarly, the greater the charge on the ions, the stronger the attraction between them, and the greater the lattice energy.

Calcium oxide (CaO) has the smallest ions, which are also the most highly charged (+2 and -2), so it has the highest lattice energy. Magnesium oxide (MgO) has slightly larger ions, but they are still highly charged (+2 and -2), so it has the second-highest lattice energy. Strontium sulfide (SrS) has the largest ions, and they are also the least highly charged (+2 and -2), so it has the lowest lattice energy.

Therefore, the correct order of increasing magnitude of lattice energy is CaO < MgO < SrS.

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Answer:

molarity

Explanation:

If one does not observe any difference in the TLC after 20 minutes, it shows that the reaction was not carried out or did not take place.  In such a case, one should repeat the reaction under optimal conditions.

In such a case, you should consider rechecking the reaction or the analytical technique used. This situation suggests that the reaction may be unsuccessful due to a technical issue such as failure to provide necessary conditions for the reaction to occur. It may also imply that the reaction being analyzed did not undergo any significant transformation, hence no difference was observed.

One can solve this problem by changing the solvent and considering the pH of the solution to provide optimal conditions for the reaction to occur. A more sensitive analytical method could also be employed to detect small changes or differences. The primary cause of the orange color is impurities present in the product, which are subsequently reduced to form the final product through sodium bisulfite treatment. When cooled, if no crystals form, it indicates that the product did not form, and the reaction did not take place.

This can result from an incorrect ratio of reactants, the purity of reagents, or incorrect reaction conditions. In such a case, one should repeat the reaction under optimal conditions.

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Answer:

160 g

Explanation:

1 mole of oxygen atom = 16 g

Number of moles of oxygen given = 5 mole

Molecular weight of oxygen molecule = 32 g/ mole

Weight of oxygen in gram = 5 mol x 32 g/mol= 160 g

Therefore, 160 g of oxygen is present in 5 moles.

Tiana is developing a chemical additive to be used in swimming pools.

Chemical additives are substances added to products to alter or improve their performance. They are used in a wide range of consumer products and industrial processes for a variety of purposes including improving shelf-life, enhancing flavor, or increasing the efficiency of a process. Common examples of chemical additives are preservatives, colorants, emulsifiers, antioxidants, stabilizers, and thickeners.

This additive is designed to help keep the pool clean and sanitary, by removing bacteria and other contaminants from the water. The additive is also designed to help balance the pH of the pool water, to ensure that it is safe for swimming and does not irritate swimmers' skin or eyes. The chemical additive must also be safe to use, and must not cause any adverse reactions in swimmers. Tiana's work involves testing different chemical compounds to find the most effective and safe additive for pool water.

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The final volume of the reconstituted cefazolin solution is 4 mL.  The volume of the cefazolin powder is 0.6 mL. The final volume of the 100 mg/mL cefazolin solution is 10 mL.

The packaging insert instructs to add 3.4 mL of sterile water without bacteriostat to the 1-g vial of cefazolin. This results in a reconstituted solution with a concentration of 250 mg/mL.

To find the final volume, we can set up the equation:

Concentration of reconstituted solution = Amount of drug / Final volume

Using the given concentration (250 mg/mL) and the amount of drug (1 g = 1000 mg), we can rearrange the equation to find the final volume:

250 mg/mL = 1000 mg / Final volume

Solving for the final volume:

Final volume = 1000 mg / 250 mg/mL = 4 mL

Therefore, the final volume of the reconstituted cefazolin solution is 4 mL.

To find the volume of the cefazolin powder, we need to subtract the volume of sterile water added from the final volume of the reconstituted solution.

Given that 3.4 mL of sterile water is added to the vial, and the final volume of the reconstituted solution is 4 mL, we can calculate the volume of the cefazolin powder as follows:

Volume of cefazolin powder = Final volume - Volume of sterile water added

Volume of cefazolin powder = 4 mL - 3.4 mL = 0.6 mL

Therefore, the volume of the cefazolin powder is 0.6 mL.

To determine the final volume of the 100 mg/mL cefazolin solution, we can use the concentration and the amount of drug.

We are given that the resulting concentration after reconstitution should be 100 mg/mL. Considering the amount of drug is 1 g (1000 mg), we can set up the following equation:

Concentration of reconstituted solution = Amount of drug / Final volume

Using the given concentration (100 mg/mL) and the amount of drug (1000 mg), we can rearrange the equation to find the final volume:

100 mg/mL = 1000 mg / Final volume

Solving for the final volume:

Final volume = 1000 mg / 100 mg/mL

Final volume = 10 mL

Therefore, the final volume of the 100 mg/mL cefazolin solution is 10 mL.

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I think it is

K2SO4?

Answer:

1 And 2 are soluble in water