Consider two samples of water of equal mass; one that is at 20. 0 °c and the other is at 30. 0 °c. Please compare the volume of these two water samples, and explain how you determined this conclusion.

Pentane would be more soluble in benzene than in ethanol.

Pentane is an organic compound that consists of five carbon atoms and twelve hydrogen atoms. It is an alkane that is highly non-polar, making it hydrophobic in nature. It does not dissolve well in water, which is a polar solvent. It has a relatively low boiling point and is highly volatile, making it an excellent solvent for organic compounds. Ethanol is a polar solvent that has the ability to dissolve both polar and non-polar substances.

Benzene is also an organic compound that consists of six carbon atoms and six hydrogen atoms. It is a highly non-polar substance, which is why it does not dissolve well in water. Benzene is an aromatic hydrocarbon, which means it contains a conjugated ring of atoms. It is an excellent solvent for non-polar substances, including pentane.Therefore, pentane would be more soluble in benzene than in ethanol.

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Answer:

A. Actual Yield

Since all of the others are calculated not measured outright.

Answer:B

Explanation: got it right on test

Test to see whether your material is strong and works well  should be the next step in your process. Therefore, the correct option is option B.

Space science and technology are used in space exploration to learn more about the universe. While astronomers use telescopes to explore the universe, both unmanned robotic space missions and human spaceflight also participate in the physical exploration of space.

When planning space exploration, scientists face many challenges. One issue is the weight of the items being transported. They can use the engineering design process to help minimize the weight of materials on board a spacecraft.  You have designed a prototype of a new, lighter material. Test to see whether your material is strong and works well  should be the next step in your process.

Therefore, the correct option is option B.

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Answer: it’s the bottom 2

Explanation: I just took the test and was able to see the answer. :)

Answer:

Chemistry makes no sense. See below for answer.

Explanation:

Answer:

Earth is built around compounds that contain elements such as carbon, nitrogen, hydrogen and oxygen

Explanation:

We multiply an angle by 180°/ to translate it from radians to degrees. We multiply an inclination by /180 to change it from degrees to radians.

Radian Formula

Firstly, One degree equals PI/180 radians, and one unit of measure equals 180/PI degrees. Decide how many degrees you want to transform to radians by multiplying the number of degrees by PI/180 (for instance, 90 degrees = 90 x PI/180 radians = PI/2).

By how much we cocked our heads, we may measure angles in degrees. Radians use the distance covered to calculate angles. The angle (s) multiplied by radius yields an angle in trigonometric functions (theta) (r). A circular has 360 degrees, or 2 pi radians, and it takes 2 * pi * r / r to round it entirely.

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Answer:

I'm assuming you meant frosted glass, not forested glass, so your answer would be frosted glass

Explanation:

translucent is similar to being see through, and the only option out all of the ones provided that's see through is frosted glass.

Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination. HOPE it helps

Water and Magnesium chloride is formed when (hcl) is neutralized by an antacid like mg(oh)2.

2 HCl (aq) + Mg (oh) 2 (aq) → Mg Cl2 (aq) 2H2O (l)

A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.

A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth. It allows plants and a few microbes to transform water and carbon dioxide gas into storable sugar and oxygen.

Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.

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Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.

To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:

moles = concentration × volume

Given:

Concentration of AgNO3 solution = 0.500 M

Volume of AgNO3 solution = 150 mL

First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).

1 L = 1000 mL

Therefore, the volume of the AgNO3 solution in liters is:

150 mL × (1 L / 1000 mL) = 0.150 L

Now we can calculate the moles of AgNO3 using the formula:

moles = concentration × volume

moles = 0.500 M × 0.150 L

moles = 0.075 mol

So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.

Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).

From the balanced chemical equation:

2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)

We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.

Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:

moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol

To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:

Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol

mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4

mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g

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Answer:

its C

Explanation:

just took the quiz

Since the melting point of Germanium is higher than Tin, the metallic bonding in Germanium is stronger than that of Tin.

Metallic bonding is the bonding that exists between the atoms of the elements in a metal.

Metallic bonding occurs as a result of the electrostatic attraction between an electron cloud of delocalized electrons and the positively charged metal ions.

The stronger the electrostatic forces of attraction between the electron cloud of delocalized electrons and the positively charged metal ions, the stronger will be the metal and the higher will be the melting point of the metallic atom.

The melting point of a solid is the temperature at which the solid is converted to heat on the addition of heat without an increase in the temperature of the solid.

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A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. according to the law of conservation of mass, potassium iodide should be formed after the reaction is complete is 16.70 g.

According to the law of conservation mass, in a chemical reaction mass can neither be created nor destroyed.

According to the law, mass of the reactant is always equal to the mass of product, because in a chemical reaction, mass can neither be created nor destroyed.

The balanced chemical reaction is -

2 K      +       I₂    →      2 KI

3.90 g  +   12.7 g   =   16.70 g

16.70 g                  =   16.70 g

Therefore, when the reaction proceeds to completion, 16.70 g product is obtained as the sum of reactants is 16.70 g and according to law of conservation of mass, mass is neither created nor destroyed but it only converts from one form to another form.

Hence, potassium iodide formed is 16.70 g.

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Answer:

Sodium And Chlorine

Explanation:

Sodium is highly reactive and dangerous metal

Chlorine is poisonous to humans

Together, They make NaCl, Common Salt

Sodium and chlorine are the two dangerous substances on the periodic table that would give a harmless product for humans to use.

A material is considered an element if it cannot be divided into two or even more simpler compounds by any kind of chemical process, including the use of heat or light. For instance, when a piece of gold is melted, the gold element still melts and is there.

These substances are monoatomic, meaning they are made up of just one kind of atom. The fundamental components of matter are thought to be the elements. There are currently 118 known elements, 94 of which are found in nature while the remaining 24 are created artificially. Sodium and chlorine are the two dangerous substances on the periodic table that would give a harmless product for humans to use.

Therefore, sodium and chlorine are the two dangerous substances on the periodic table that would give a harmless product for humans to use.

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Answer:

the method is fractional distillation

1) a) The apparatus that can be used to separate a mixture of ethanol and water is called a fractional distillation apparatus. It consists of the following components:

b) The method of separation used in this apparatus is called fractional distillation.

2) In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revalorize.

Distillation flask: This is a round-bottomed flask where the mixture of ethanol and water is initially placed.

Fractionating column: A long column with several glass beads or plates. It provides a large surface area for the vaporized components to condense and revalorize, aiding in the separation process.

Thermometer: It is placed at the top of the fractionating column to monitor the temperature during the distillation process.

Condenser: It is a coiled glass tube connected to the fractionating column. Cold water flows through the condenser, causing the vaporized components to condense back into liquid form.

Receiver flask: This is where the separated components are collected. The receiver flask is placed at the end of the condenser.

b) The method of separation used in this apparatus is called fractional distillation. Fractional distillation is employed when the components of a mixture have similar boiling points. In the case of ethanol and water, they form an azeotropic mixture with a boiling point of around 78.2°C. Simple distillation would not effectively separate these two components because they would boil together and vaporize simultaneously.

In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revaporize. This repeated condensation and revalorization process allows for more efficient separation. The higher surface area in the fractionating column helps to achieve better separation of the ethanol and water, resulting in a more concentrated sample of ethanol in the distillate collected in the receiver flask.

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1. Water flows through the penstock

2. The water then spins the blades in a turbine which, in turn, spins a generator that ultimately produces electrical energy

Hydropower, or hydroelectric power, is one of the oldest and largest sources of renewable energy, which uses the natural flow of moving water to generate electrical energy. The moving water is passed through a pipe also known as penstock, it then turns the blade of the turbine. which then rolls or spin a generator thereby electricity is produced.

The work of the turbine is to convert the kinetic energy of the running water into useable energy.

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Answer:

chemical synthesis or chemical property

Explanation:

The pH of a 0.15 M NH3 (ammonia) solution can be determined using the Kb value for NH3. However, when NH4Cl is added to the solution, it forms NH4+ and Cl- ions, which affect the pH. To determine the pH of a solution containing 0.15 M NH3 and 0.35 M NH4Cl, the concentrations of NH3 and NH4+ need to be taken into account along with the Kb value. we can find the pH using the equation pH = 14 - pOH, which gives pH = 11.86. This can be done by calculating the concentration of NH4+ ions reacting with water and subtracting it from the initial concentration of NH4+ ions (0.35 M).

(a) The pH of a 0.15 M NH3 solution can be determined using the Kb value for NH3, which is 1.8 × 10^−5. NH3 is a weak base that reacts with water to form OH− ions. To find the concentration of OH− ions, we can use the Kb expression:

Kb = [NH4+][OH−] / [NH3]

Since the initial concentration of NH4+ is negligible, we can assume that the concentration of OH− is equal to [NH4+]. Let's denote the concentration of OH− as x. Thus, the equation becomes:

1.8 × 10^−5 = x^2 / 0.15

Solving this quadratic equation gives x = 7.32 × 10^−3 M. To find the pOH, we can use the formula pOH = -log10[OH−]. Thus, pOH = -log10(7.32 × 10^−3) = 2.14. Finally, we can find the pH using the equation pH = 14 - pOH, which gives pH = 11.86.

(b) In a solution containing 0.15 M NH3 and 0.35 M NH4Cl, NH4Cl dissociates into NH4+ and Cl− ions. The NH4+ ions can react with water to form NH3 and H3O+ ions. This affects the concentration of NH3 and, consequently, the pH of the solution. The NH4Cl concentration is greater than the NH3 concentration, indicating an excess of NH4+ ions. The excess NH4+ ions will react with water to form H3O+ ions, making the solution acidic. To determine the pH, we need to find the concentration of H3O+ ions. This can be done by calculating the concentration of NH4+ ions reacting with water and subtracting it from the initial concentration of NH4+ ions (0.35 M). The pH can then be calculated based on the concentration of H3O+ ions.

In summary, the pH of a 0.15 M NH3 solution can be calculated using the Kb value for NH3. When NH4Cl is added, the pH calculation becomes more complex as the concentrations of NH3 and NH4+ need to be considered along with the Kb value.

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Answer:

To find the number of neutrons in an atom simply calculate the difference between the atomic mass of the atom and the number of protons in the atom. You can find the number of protons in an atom by looking at it's atomic number. The reason this works is because atomic mass is the amount of protons and neutrons. Subtracting the protons from that amount leaves us with the neutrons.

Example: Let's look at Arsenic (my favorite element lol) which has an atomic number of 33 and atomic mass of about 75 (always round to nearest whole number) which means that the number of neutrons is 75 - 33 = 34.

Answer:

2 bonds

Explanation:

because carbon dioxides is CO2

the carbon bond to the oxygen

then the same carbon to another oxygen making CO2

If 4.00 mL of vinegar needs 43.5 mL of 0.150 m NaOH  to reach the equivalence point in a titration, The grams of the acetic acid is 119.9 g.

Given that :

The molarity of NaOH = 0.150 M

The volume of NaOH = 43.5 mL = 0.0435 L

The moles = molarity × volume

                 = 0.150 × 0.0435

                 = 0.0065 mol

At equivalence point ,

Moles of CH₃COOH = moles of NaOH

The molarity of the CH₃COOH = moles / volume

                                                   = 0.0065 / 0.004

                                                   = 1.625 mol

Volume of  CH₃COOH = 1.50 × 0.946353

                                     = 1.230 L

The mass of the Acetic acid = 1.625 × 1.230 × 60

                                               = 119.9 g

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mmmmmmmmmmhhhhhhhhhhhhhhhhhhhh

Answer:

a difference in attitude

Explanation:

It's just not science. ... The big difference Popper identifies between science and pseudo-science is a difference in attitude. While a pseudo-science is set up to look for evidence that supports its claims, Popper says, a science is set up to challenge its claims and look for evidence that might prove it false.

The compound whose carbonyl stretch occurs at the lowest wavenumber is C) CH3CH2CONH2.

The wavenumber of the carbonyl stretch is determined by the strength of the carbonyl bond. The stronger the bond, the higher the wavenumber. The strength of the carbonyl bond is affected by the groups attached to it. Electron-donating groups, such as alkyl groups, decrease the strength of the carbonyl bond and lower the wavenumber. Electron-withdrawing groups, such as nitrogen and oxygen atoms, increase the strength of the carbonyl bond and raise the wavenumber.

In the given compounds, CH3CH2CONH2 has an electron-withdrawing nitrogen atom attached to the carbonyl group, which increases the strength of the carbonyl bond and results in a lower wavenumber for the carbonyl stretch. The other compounds have alkyl groups attached to the carbonyl group, which decrease the strength of the carbonyl bond and result in a higher wavenumber for the carbonyl stretch. Therefore, the compound whose carbonyl stretch occurs at the lowest wavenumber is C) CH3CH2CONH2.

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The leadership theory most closely matches bryans argument is participative theory. The correct option is b.

A leadership approach known as participatory leadership theory solicits feedback from every employee in the organization.

Before making choices or developing new processes and procedures, the team leader typically solicits feedback and suggestions from their team members.

One of the first conceptual approaches to leadership was provided by the trait theory (also known as the great man hypothesis).

Therefore, the correct option is b. participative theory.

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When an electron absorbs photons it moves to a higher energy level.

Absorption of photons occurs when electrons in a given state absorb photons which causes them to gain energy and jump to higher energy levels.

The electrons will move to higher energy level because they have acquired more energy.

Thus, when an electron absorbs photons it moves to a higher energy level.

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Answer:

c

Explanation:

c is correct i believe

ANSWER

The volume of SO2 is 147.89L

STEP-BY-STEP EXPLANATION:

Given information

Step 1: Find the mole of SO2 using the below formula

Recall, the molar mass of SO2 is 64.066 g/mol

Recall that, 1 mole of gas is equivalent to 22.4L at STP

Let x represents the volume of SO2

Hence, the volume of SO2 is 147.89L

The structure of the molecule is CH₃-CH₂-CH₂-C(=O)-CH-(CH₃)₂. The IUPAC name of the molecule is propan-2-yl butanoate.

The formula provided is C₇H₁₄O₂. An alkene consisting of 7 carbon atoms has the formula C₇H₁₆. Since there are two hydrogen atoms missing from the given formula, we can estimate that there exists a double bond in the structure.

Since a strong signal is received at 1720 cm⁻¹, it is conclusive proof of a carbonyl group (C=O) being present.

The peaks and tentative assignments for the 1H NMR has been attached in the document below.

The typical patterns that can be deciphered from the analysis are:

1H:6H doublet-septet = -CH(CH₃)₂

3H doublet = CH₃CH₂-

2H doublet = -CH₂CH₂

Then, on analyzing the spectrum accounts for the available seven carbon atoms (table attached in document below),

We can confirm that the compound is isopropyl butyrate or as its IUPAC name is propan-2-yl butanoate.

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Complete question: A compound with molecular formula C7H14O2 displays the following 1H NMR and 13C NMR spectra. An ir of this same compound shows a strong signal at 1720 cm-1. based on this information, determine the structure of this molecule. what is the iupac name of the molecule? The image is attached below.