Which solution will have the higher boiling point?

(1) 200.0 g glucose dissolved in 1.00 kg of water (mm = 180 g/mol)

(2) 200.0 g sucrose dissolved in 1.00 kg of water (mm = 342 g/mol)

Answer: yes but im not 100 percent sure

Explanation:

Answer:

The original volume of the gas is 0.001 mL

Explanation:

This easy excersise can be solved by the law for gases, about pressure and volume; the volume of a gas is inversely proportional to the pressure it exerts.

We can propose the rule by this formula:

P₁  / V₁ = P₂ / V₂

We replace data given: 1.50 atm / V₁ = 0.50 atm / 750 mL

As the rule says, that volume is inversely proportional, and the pressure was decreased, volume must be lower than 750 mL.

1.5atm / (0.5 atm / 750mL) = V₁

V₁ = 0.001 mL

Answer:

11. A)outward

12. B) inward

13. B) opaque

14. I really don't know (sorry)

Explanation:

Answer:

can be used in fireworks, flares and sparklers

Explanation:

as it burns in air it ignites with bright light

Answer:

The vinegar is not enough to neutralize the pool.

Explanation:

The [OH⁻] in the pool is 1.0x10⁻¹mol / L. To know how many moles of OH⁻ are in the solution, you must calculate volume of the pool thus:

V(pool) = πr²h

Where radius is d/2 = 12m/2 = 6m

and h is deep of the pool = 10m

V(pool) = π(6m)²*10

V(pool) = 1131m³

As 1m³ = 1000L:

1131000L in the pool. And moles of OH⁻ are:

1.0x10⁻¹mol / L ₓ 1131000L = 131100 moles of OH⁻ are in the pool

The neutralization of OH⁻ with H⁺ is:

OH⁻ + H⁺ → H₂O

To neutralize the pool you must add 131100 moles of H⁺.

The H⁺ concentration in a vinegar pH = 2 is:

pH = -log [H⁺]

2 = -log [H⁺]

1x10⁻²M = [H⁺]

4L are just 4x10⁻² moles of [H⁺]. That means:

The formula for calculating the concentration of a solution in mg/L is as follows:Concentration in mg/L = (weight of solute in mg / volume of solution in L). Concentration in mg/L = (0.5 g × 1000 mg/g) / 0.5 L. Concentration in mg/L = 1000 mg/L.

(b) The formula for calculating the concentration of a solution in ppm is as follows:

Concentration in ppm = (weight of solute in mg / volume of solution in ml) × 10³.

Concentration in ppm = (0.5 g × 1000 mg/g) / 500 ml × 10³.

Concentration in ppm = 1000 ppm.

(c)The formula for calculating the concentration of a solution in ppb is as follows:

Concentration in ppb = (weight of solute in mg / volume of solution in ml) × 10⁶.

Concentration in ppb = (0.5 g × 1000 mg/g) / 500 ml × 10⁶.

Concentration in ppb = 1000000 ppb.

(d) Moles/lThe molecular weight of KCl is 74.55 g/mol.

To calculate the concentration of KCl in moles/liter, we must first convert 0.5 g to moles.

Number of moles = weight / molecular weight.

Number of moles of KCl = 0.5 g / 74.55 g/mol.

Number of moles of KCl = 0.0067 moles.

Concentration in moles/liter = number of moles / volume in L.

Concentration in moles/liter = 0.0067 moles / 0.5 L.

Concentration in moles/liter = 0.013 M (M = moles/L).

Therefore, the concentration of KCl is (a) 1000 mg/L, (b) 1000 ppm, (c) 1000000 ppb, and (d) 0.013 M.

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Answer:

Below

Explanation:

Balanced form;

\(2C_6H_6 +15O_2 -> 12CO_2+6H_2O\\\\ Ca_3(PO_4)_2 +8C -> Ca_3P_2 +8CO\\\\2HNO_2+O_2 -> 2HNO_3\\\\Ca(OH)_2 + CO_2 -> CaC0_3+H_2O\\\\2K +Br_2 ->2KBr\\\\2NaOH+FeSO_4 -. Na_2SO_4 +Fe(OH)_2\)

1.Benzene + Dioxygen = Carbon Dioxide + Water

2.Tricalcium phosphate +Carbon = Calcium phosphide + carbon monoxide

3.Nitrous acid react with oxygen to produce nitric acid.

4.This means that the carbon dioxide and limewater react to produce calcium carbonate and water.

5.Potassium react with bromine to produce potassium bromide

6. An aqueous solution of ferrous sulphate reacts with aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in the solution.

Answer:

Because it is the same element but has different atomic mass

The process of heating a solid fuel so that it liberates gaseous fuel vapors is called B. Pyrolysis.

Pyrolysis is a chemical process in which a substance is decomposed by heat in the absence of oxygen or with limited oxygen. This process involves the thermal decomposition of organic material at elevated temperatures in the absence of oxygen.

Pyrolysis is used to convert solid fuels, such as coal, into gaseous fuels, such as methane and hydrogen. The resulting gaseous fuels can then be used for energy production or other industrial processes.

Therefore, the correct answer is option B. Pyrolysis.

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Among common fluids, gases generally have the lowest viscosity compared to liquids.

Viscosity is a measure of a fluid's resistance to flow or its internal friction. In gases, the molecules have greater separation and move more freely, resulting in lower intermolecular forces and thus lower viscosity.

Among gases, lighter gases with smaller molecular sizes tend to have lower viscosities. For example, helium (He) is one of the lightest gases and has a very low viscosity. Other gases like hydrogen (H2) and neon (Ne) also exhibit low viscosities.

It's important to note that the viscosity of a fluid can be influenced by various factors, such as temperature and pressure. However, in general, gases have lower viscosities compared to liquids.

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The scientific question that can be answered through investigation will be:

"Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

A scientific question is a question that may lead to a hypothesis and help us in. answering (or figuring out) the reason for some observation.

A scientific question simply means a question where a researcher designs a question in order to get an answer to a particular investigation.

According to this question,

Since the researcher wants to know the person responsible for the classroom good mess by determining which macromolecules are present in the mystery food sample, then the question will be "Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

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Answer:

This question lacks options. The options are:

A. The two substances underwent a physical change

B. The two substances were melting

C. A new substance was forming

D. A change in the mass of the two substances

The answer is C

Explanation:

Changes in chemistry can either be physical or chemical. A physical change as the name implies does not alter the chemical content of the susbtances involved. However, chemical changes affect the chemical composition of the substances, hence, new substances are produced.

A chemical change is also characterized with a color change, temperature change, gas evolution etc. In this question, Mia mixed two substances in a test tube and noticed that the test tube became warm, gas came out from the test tube. This implies a CHEMICAL CHANGE, LEADING TO THE FORMATION OF NEW SUBSTANCES.

Answer:

density is a ratio of mass to volume

Explanation:

density=mass/volume

1=mass/125

mass=1 x 125

mass=125g

pardon my not typing units during solution

The structure of the 4-ethyl-2-methyl-3-propyl heptanoic acid is shown in the image attached

The arrangement and connectivity of the atoms within a molecule are referred to as the structure of an organic substance. Along with other elements including oxygen, nitrogen, sulfur, and halogens, organic molecules are largely made of carbon atoms bound to hydrogen atoms.

It is crucial to remember that organic compounds can exist in several isomeric forms, where the same chemical formula leads to various structural configurations. The connection of atoms or the spatial arrangement of atoms in three-dimensional space might vary between isomers.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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INFORMATION:

We know that:

- sodium and oxygen react to produce Sodium Oxide

-

Answer: The heat capacity of a bomb calorimeter is 500 J°C.

Answer:

The answer is: The Earth rotates on its axis.

The order of precipitation with increasing pH for hyrdroxide salts with metal ions at a concentration of 0.10 M is as follows: Al(OH)3, Zn(OH)2, Pb(OH)2, Fe(OH)3, Cu(OH)2.

When a hydroxide salt dissolves in water, it forms metal cations (M+) and hydroxide anions (OH-) in the solution. The solubility of a hydroxide salt depends on the equilibrium between the dissolved ions and the solid salt. As the pH of the solution increases, the concentration of hydroxide ions (OH-) also increases. This affects the equilibrium and causes the precipitation of hydroxide salts.

The order of precipitation is determined by the solubility product constant (Ksp) of each hydroxide salt. Ksp is the equilibrium constant for the dissolution of a slightly soluble salt. The lower the Ksp value, the less soluble the salt is, and the earlier it will precipitate as the pH increases.

In this case, Al(OH)3 precipitates first because it has the lowest Ksp value among the given salts. Zn(OH)2 follows with a slightly higher Ksp value, followed by Pb(OH)2, Fe(OH)3, and Cu(OH)2, which has the highest Ksp value. As the pH increases, the solubility of these salts decreases, and they precipitate in the order determined by their Ksp values.

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Thickening the material involved is a way in which the rate of thermal energy transfer into the pie can be maximized.

This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy. It is usually measured with the use of a thermometer and the S.I unit of this type of measurement is Kelvin.

The way in which the rate of thermal energy transfer can be maximized is by thickening the material as it will ensure that the atoms are tightly packed together which permits the flow of electrons or heat between them in this scenario.

The arrangement of the atoms ensures that the thermal energy is easily absorbed and also has a relative high specific heat capacity thereby making it the correct choice.

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Answer:

1 atmosphere pressureAlso, dry ice placed on a warm surface will not melt, because carbon dioxide cannot be liquefied unless subjected to pressures greater than 5.1 atm (Figure 1). Rather, a piece of dry ice will go directly from the solid to the gaseous phase (it will sublime) when it warms at 1 atmosphere pressure (Figure 1, red arrow

Explanation:

It is hypothesized that as the temperature of the air inside the plastic bottle decreases, the volume of the air will decrease as well, in accordance with Charles's Law and the contraction of the plastic bottle.

Hypothesis:

Based on the ideal gas law and the behavior of gases, it is hypothesized that when the temperature of the air inside a plastic bottle is decreased, the volume of the air will decrease as well. This hypothesis is rooted in the understanding that gases tend to contract and occupy less space when their temperature decreases.

According to Charles's Law, which states that the volume of a gas is directly proportional to its temperature when pressure is held constant, it is expected that as the temperature of the air in the plastic bottle decreases, the gas molecules will lose kinetic energy, resulting in a decrease in their average speed. This decrease in speed will lead to a decrease in collisions between the gas molecules and the walls of the container, causing the air to occupy less volume.

Furthermore, since the air is trapped inside a plastic bottle, the decrease in temperature is expected to cause the plastic to contract slightly, exerting additional external pressure on the gas molecules and further reducing the volume they occupy.

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the answer is B. Parasite.

Answer: A

Explanation: I got it right on mine

Answer:

O by revising the theory that explained atoms to include this new information

by designing new technology that would prove the new information was wrong

Answer:

O by revising the theory that explained atoms to include this new information

by designing new technology that would prove the new information was wrong

Explanation:

The cell potential is 0.78 V

The redox reaction occurring is as follows;

Mn^2+2e⇒Mn(s) E0=-1.18 V

Cd^2+ +2e⇒Cd(s0 E0=-0.40 V

Reversing the first reaction and adding the half cell reaction, we get

Mn→Mn^2+ + 2e

Cd^2+ (aq) +2e→Cd(s)

Adding the reaction, we get

Mn(s)+ Cd^2+⇒Mn^2+ +Cd(s)

E0 (cell)=-0.40 V-(-1.18V)

E0(cell)=0.78 V

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