Which one of the following would not be affected by boiling with aqueous sodium hydroxide?
A: ethyl ethanoate
B: glycerol
C: olive oil
D: propanoic acid

what is the answer and why? thanks!

Answer:

A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.

Explanation:

Brainlist

Answer: The oxidation number P in Ca3(PO4)2 is +1

Explanation:

To find the oxidation number of P in Ca3(PO4)2, we need to use the following rules:

The oxidation number of an atom in its elemental form is always 0.

The oxidation number of a monatomic ion is equal to its charge.

The sum of the oxidation numbers of all atoms in a neutral compound is 0.

The sum of the oxidation numbers of all atoms in a polyatomic ion is equal to the charge of the ion.

Let's start with Ca3(PO4)2:

The oxidation number of Ca is +2. This is because Ca is an alkaline earth metal and tends to lose 2 electrons to form a 2+ ion.

The oxidation number of O is -2. This is a common rule for oxygen in most compounds.

We don't know the oxidation number of P yet, so let's call it x.

Now we can use rule 3 to set up an equation:

3(2+) + 2x + 4(-2) = 0

Simplifying, we get:

6 + 2x - 8 = 0

2x - 2 = 0

2x = 2

x = +1

Therefore, the oxidation number of P in Ca3(PO4)2 is +1.

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There are approximately 4.86 grams of Kr in the cylinder.

To calculate the number of grams of Kr in a cylinder, we need to use the ideal gas law:

PV = nRT

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

First, we need to convert the volume from liters to cubic meters:

7.24 L = 0.00724 m³

Next, we can use the two pressures and volumes to calculate the number of moles of Kr:

n₁ = (14.7 atm × 0.00724 m³) ÷ (8.31 J/(molK) × 298 K)

n₁ = 0.038 mol

n₂ = (7.77 atm × 0.00724 m³) ÷ (8.31 J/(molK) × 298 K)

n₂ = 0.020 mol

The total number of moles of Kr in the cylinder is:

n = n₁ + n₂

n = 0.038 mol + 0.020 mol

n = 0.058 mol

Finally, we can use the molar mass of Kr (83.80 g/mol) to convert the number of moles to grams:

m = n × M

m = 0.058 mol × 83.80 g/mol

m = 4.86 g

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26.8L is the volume, in liters, of 1.20 mol of C[tex]_3[/tex]H[tex]_8[/tex] gas at STP. A measurement of three-dimensional space is volume.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.

The volume of an envelope is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

Volume = 1.20×22.4

              =26.8L

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If a beaker contains 15.6 moles of water, H[tex]_2[/tex]O, 9.3×10²⁴ are the number of molecules this represent.

The smallest recognisable unit into that a pure substance may be divided while retaining its composition & chemical properties is a molecule, which is a collection of more than one atom.

Until parts made up of individual molecules are reached, splitting of a sample of an item smaller progressively smaller parts does not result in a change regarding its composition as well as its chemical properties.

5.number of molecules= 15.6 ×  6.022×10²³

                                    =9.3×10²⁴  

6. .number of molecules=0.317  ×  6.022×10²³

                                       =1.89×10²³

7. number of moles =6.01 x 10 25/ 6.022×10²³

                               = 100 moles

8.  number of moles =3.54 x 10²¹/ 6.022×10²³

                                 = 0.005moles

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The vapor pressure for SiCl₄ in the mmHg at the temperature of 33.0 °C is the 271.8 mmHg.

The Clausius - Clapeyron equation is as :

ln ( P₂ / P₁ ) = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

P₂ = P₁eˣ

Where,

The temperature, T₁  = 5.4 °C = 278.55 K

The temperature, T₂  = 33.0 °C= 306 K

The pressure, P₁ = 100 mmHg

The heat of the vaporization,  ΔHvap = 30.2 kJ /mol = 30200 J/mol

The gas constant, R = 8.314 J / mol K

x = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

x = 30200 / 8.314 ( 1/ 278.55 - 1/ 306)

x = 1

P₂ = 100e¹

P₂ = 271.8 mmHg

The vapor pressure of the SiCl₄ is 312 mmHg.

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The correct notation for the electron configuration of Cobalt is [Co]4s²3d⁷ (option D).

Electron configurations are the summary of where the electrons are around a nucleus. It describes how electrons are distributed in its atomic orbitals.

Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence.

The electron configuration for cobalt is 1s²2s²2p⁶3s²3p⁶3d⁷4s², which is best represented in noble gas notation as [Ar] 3d⁷ 4s².

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The hydrogen is produced by reacting methane (CH4) with water. If you have 249 grams of methane, 45gram is the mass of hydrogen will be produced.

A body's mass is an inherent quality. Prior to the discoveries of the atom & particle physics, it was widely considered to be tied to the amount of matter within a physical body. It was discovered that, despite having a comparable amount of matter in theory, different atoms and elementary particles have varied masses.

There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to deceleration (change of velocity) whenever a net force is applied can be measured experimentally as mass.

CH[tex]_2[/tex] + H[tex]_2[/tex]O →CO + 3H[tex]_2[/tex]

moles of methane = 249/16.043= 15.5moles

moles of hydrogen = 15.5×3 = 45moles

mass of hydrogen =45×1=45gram

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There are 0.2107 moles of KBr are dissolved in 60.2 mL of a 3.50 M solution.

The molarity of a substance is defined as the number of moles of solute present in 1 litre of a solution.

According to the given data, the molarity of the solution tells us that there are 3.50 moles of KBr in 1000mL of solution. But we only have 60.2mL of solution, so with a mathematical rule of three we can calculate the amount of moles in 60.2mL:

1000 ml - 3.50 moles

60.2 ml -x = 60.2 ml× 3.50 moles/1000 ml

x= 60.2 ml -0.2107 moles

So, there are 0.2107 moles of KBr.

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The concept Avogadro's law is used here to determine the moles of gas present in the sample. Avogadro's law is also known as the Avogadro's principle or Avogadro's hypothesis. It is closely related to the ideal gas equation.

According to Avogadro's law, equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules. It follows that the volume of the gas is directly proportional to the number of molecules.

The equation is:

V₁n₁ = V₂n₂

n₂ = V₁n₁ / V₂

3.80 × 1.70 / 1.45 = 4.45

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The number of nitrogen atoms in a container of volume 0.50 dm³ at 0 °C. The pressure of the gas is 101 Pa. is  approximately 1.47 x 10^19 nitrogen atoms in the given container.

PV = nRT

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

0.50 dm³ = 0.50 x [tex]10^-^3[/tex] m³

0 °C = 273 K

n = PV/RT

n = (101 Pa)(0.50 x [tex]10^-^3[/tex] m³) / [(8.31 J/mol K)(273 K)]

n = 0.0000244 mol

n = (0.0000244 mol)(6.02 x [tex]10^2^3[/tex]atoms/mol)

n = 1.47 x [tex]10^1^9[/tex] nitrogen atoms

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The electrolysis of water has the following balanced equation:

[tex]O_2(g) = 2H_2O(l) + 2H_2(g)[/tex]

According to the equation, it takes 2 moles of electrons to generate 1 mole O2.

The Faraday constant, F, which represents the charge carried by 1 mole of electrons, must be used to calculate the amount of charge needed to produce a specific amount of O2. The value of F is 96500 C/mol.

Using the Ideal Gas Law, we must first determine how many moles of O2 are formed from 1.50 L of O2 gas at 25.0 °C and 1.00 atm pressure:

PV = NRT

n = (PV)/(RT) = 1.00 atm/1.50 L/[(0.0821 lat/(molK)](298 K)]

= 0.0607 mol

Therefore, 0.0607 moles of O2 are formed.

We need 2 moles of electrons, or 2 x 0.0607, or 0.1214 moles, because 1 mole of oxygen requires 2 moles of electrons.

Finally, we can use the Faraday constant to determine the required charge:

Q = Nf = 0.1214 mol, 96500 C/mol, or 11700 C

Therefore, 11700 coulombs of charge are needed to produce 1.50 L of oxygen at 25.0 °C and 1.00 atm pressure.

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8.63 grams of KBr are dissolved in 72.7 mL of a 0.998 M solution.

To answer first we need to calculate the molar mass of this molecule (KBr):

For this we go to the periodic table and check the molar weight of potassium and bromine:

K: 39.098 g/mol

Br: 79.904 g/mol

So the molar mass of KBr is

= 39.098 g/mol + 79.904 g/mol

=119 g/mol

Now, we know that the solution is 0.998 M, this means that in 1000 ml there are 0.998 moles of KBr. So we calculate the number of moles in 72.7ml:

number of moles of KBr

= 72.7 ml × 0.998 molL⁻¹/ 1000 mlL⁻¹

=0.0725 moles

Now we use the molar mass to calculate the mass in grams in the sample:

mass of KBr

= 0.0725 moles ₓ 119 g/mol

=8.6275 g

≈8.63 g

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The molarity of a solution containing 180.16 g of sugar dissolved in 1 liter of hydrogen hydroxide would be approximately 0.5265 M.

To calculate the molarity of a solution, we need to know the number of moles of solute and the volume of the solution in liters.

Given;  Mass of sugar (solute) = 180.16 g

Volume of solution = 1 L

To find the molarity, we first need to convert the mass of sugar to moles using its molar mass. The molar mass of sugar, which is also known as sucrose, is 342.30 g/mol.

Molar mass of sugar = 342.30 g/mol

Number of moles of sugar = Mass of sugar / Molar mass of sugar

Number of moles of sugar = 180.16 g / 342.30 g/mol ≈ 0.5265 mol

Now that we have the number of moles of sugar, we can plug it into the formula for molarity;

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

Molarity (M) = 0.5265 mol / 1 L = 0.5265 M

Therefore, the molarity of the solution is 0.5265 M

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Alkene is an unsaturated hydrocarbon which contain at least one carbon-carbon double bond. Here butene is an alkene with the chemical formula C₄H₈. The functional group present in alkenes is the double bond.

The structural isomers are those isomers in which the atoms are completely arranged in a different order but have the same molecular formulas. It is also called the constitutional isomers.

Geometric isomers are two or more compounds with the same number and types of atoms and bonds but have different geometries for the atoms.

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At critical temperatures,  B. The substance changes its state if it continues gaining or losing thermal energy.

The critical temperature of a given substance or material refers to the temperature above which vapor cannot be liquefied, which is also known as the critical point of the material.

Therefore, with this data, we can see that the critical temperature of a given substance or material is a given temperature above the critical point of such material and it is related to its vapor state.

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The main difference between water at 100°C and steam at 100°C is that the particles in steam have more space between them and are moving faster than the particles in water. Option C is correct.

The particles in steam at 100°C will have more space between them and be moving faster than the particles in water at 100°C.  When water is heated to its boiling point of 100°C, it undergoes a phase change from a liquid to a gas. In the gas phase, the water molecules have more space between them and are moving faster than they were in the liquid phase.

This is because the energy added during the heating process has broken the intermolecular bonds that held the water molecules close together in the liquid phase. As a result, the water molecules in the gas phase are free to move around more and have more kinetic energy than they did in the liquid phase. Option C is correct.

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Answer:

To determine the number of moles in 1.204 x 10^24 molecules of bromine, we first need to know the molar mass of bromine. The molar mass of bromine is 79.904 g/mol.

Next, we can use Avogadro's number, which tells us that there are 6.022 x 10^23 molecules in one mole of a substance, to convert the number of molecules to moles.

1.204 x 10^24 molecules of bromine ÷ 6.022 x 10^23 molecules/mol = 19.99 moles of bromine

Therefore, there are approximately 19.99 moles in 1.204 x 10^24 molecules of bromine.

The mass percent of the KBr in the solution will be 30.1%.

To calculate the mass percent, we need to know the mass of the solute (KBr) and the mass of the solution (KBr + water).

The molar mass of KBr is 119 g/mol (potassium has a molar mass of 39 g/mol, and bromine has a molar mass of 80 g/mol).

The mass of 3 moles of KBr is;

3 mol KBr x 119 g/mol KBr = 357 g KBr

The mass of 46 moles of water is;

46 mol H₂O x 18 g/mol H₂O = 828 g H₂O

The mass of the solution is;

357 g KBr + 828 g H₂O = 1185 g solution

The mass percent of KBr in the solution is;

(357 g KBr / 1185 g solution) x 100%

= 30.1%

Therefore, the mass percent is 30.1%.

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The molarity of the solution which contains 0.031 mol of K₂SO₄ in 622 mL of solution is approximately 0.0499 M.

Molarity is commonly used to describe the concentration of solutions in various chemical reactions, including reactions in the laboratory, industry, and everyday life. It is an important concept in chemistry for quantifying the amount of a substance present in a solution and for calculating the amount of reactants needed in chemical reactions.

To calculate the molarity of a solution, we use the formula:

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

Given; moles of K₂SO₄ = 0.031 mol

volume of solution = 622 mL = 622/1000 L = 0.622 L

Plugging these values into the formula;

Molarity (M) = 0.031 mol / 0.622 L ≈ 0.0499 M

Therefore, the molarity of the solution is 0.0499 M

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Answer: Gravity

Explanation:

A paper airplane in flight will experience an initial thrust forward which begins its flight and lift from air which will help push it upward. These forces are counteracted by drag that acts in the opposite direction as thrust and gravity which will constantly pull the plane toward the ground. Gravity will pull the paper airplane down before it travels to Orlando.

The value of K is 4.4 represents the equilibrium position of the reaction under the given conditions.

The equilibrium constant (K) for a reaction is a constant value that relates the concentrations of the reactants and products at equilibrium. For the given reaction, the equilibrium concentrations of SO₂, O₂, and SO₃ are given as [SO₂] = 1.50 M, [O₂] = 1.25 M, and [SO₃] = 3.50 M, respectively.

The equilibrium constant (K) for the reaction can be calculated using the equilibrium concentrations of the reactants and products.

K = [SO₃]²/([SO₂]²[O₂])

K = (3.50)²/[(1.50)²(1.25)]

K = 4.48

Therefore, the equilibrium constant (K) for the reaction is 4.48.

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A computer model will benefit a scientist while studying the blood cells for medical research because that would enable the scientist to see how the flow of the blood cells will look like when it is slowed down and the correct option is option B.

Our blood contains a number of blood cells which are suspended in a liquid which is known as plasma. Blood cells are the constituents of blood and are of different types like Red blood cells (RBCs), white blood cells (WBCs), Platelets etc. Plasma contains about 92% water and the most abundant solutes present in it are the plasma proteins and they include globulins, albumins etc.

Computer models help us to observe blood and its components and can provide us more insights and observation into the blood flow as we are able to slow it down as per our convenience.

Thus, the ideal selection is option B.

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The theoretical yield is the amount of copper that would be obtained if the reaction proceeded with 100% efficiency, based on the stoichiometry of the reaction and the amount of limiting reagent used.

The percentage yield of copper can be calculated using the formula:

Percentage yield = (actual yield / theoretical yield) x 100%

In this case, the actual yield is given as 0.872 g. The theoretical yield is the amount of copper that would be obtained if the reaction proceeded with 100% efficiency, based on the stoichiometry of the reaction and the amount of limiting reagent used.

In general, the percentage yield is a measure of how efficient a chemical reaction is in producing the desired product. It is calculated by comparing the actual yield obtained in the experiment to the theoretical yield that would be obtained under ideal conditions.

A high percentage yield indicates that the reaction is efficient and that the experimental setup is effective in producing the desired product. A low percentage yield indicates that there are inefficiencies or losses in the reaction, and that improvements may be needed in the experimental setup or reaction conditions.

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The statement that best described how the space program improved the culture in Florida is that the space program changed the education system, increased tourism, and created technology to help people.

Florida's culture and economy were significantly impacted by the space program. The impact on education was one of the most significant ways. Many young people were motivated to pursue STEM (science, technology, engineering, and mathematics) careers by the space program. This prompted the development of institutions and educational programs devoted to these fields, aiding in Florida's development of a highly skilled labor force.

The space program also increased tourism in Florida because people from all over the world traveled to Florida to see space launches and to visit the Kennedy Space Center. This increased employment opportunities and state revenue.

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The balanced thermochemical equation for the reaction of pentane (C5H12) with oxygen gas (O2) to produce water (H2O) and carbon dioxide (CO2) is:

C5H12 (l) + 8 O2 (g) → 5 CO2 (g) + 6 H2O (l) ΔH = -3,510 kJ

The equation is balanced by making sure there are equal numbers of atoms of each element on both the reactant and product sides of the equation. The states of matter are included in the equation to show the physical state of each substance, with (l) indicating a liquid and (g) indicating a gas.

The negative value of enthalpy (ΔH) indicates that this reaction is exothermic, meaning that it releases heat to the surroundings. In other words, the products of the reaction have a lower enthalpy than the reactants. This can be explained by the fact that the bonds formed between carbon and oxygen in CO2 and between hydrogen and oxygen in H2O are stronger than the bonds broken between carbon and hydrogen in C5H12 and between oxygen atoms in O2. The excess energy is released in the form of heat, resulting in a negative value for ΔH.

He could improve the model if he place Earth between the moon and the sun.

We know that the solar system is composed of the sun and the planets and we can have a model of the solar system when we get together the sun and the other parts of the solar system as has been done in the model that was put together by Dwight .

Since the model was intended to show the eclipse of the moon then the model can be improved if he place Earth between the moon and the sun in the image of the  model

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The following steps can be used to make a sugar 342g/mol. 0.45 solution in 50ml: 1. Determine the amount of sugar necessary. This may be accomplished by applying the formula mass = molarity x volume.

In this situation, the needed sugar mass is 0.45 x 50 = 22.5 g. 2. Dissolve 50 mL of water in the estimated quantity of sugar. To achieve this, add the sugar to the water in a beaker and swirl until it is completely dissolved.

3. Make sure the solution is exactly 50 ml in volume. This can be accomplished by adding extra water to the solution as needed. 4. The sugar 342g/mol 0.45 solution in 50 ml is now ready for use.

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