Classify each of these as a heterogeneous or homogeneous mixture

Answer:

No

Explanation:

The stronger the intermolecular forces the molecules tend to stay in the liquid phase. Compounds with weak intermolecular forces are more volatile and more molecules overcome those forces to pass to the gas phase.

A substance that accelerates the rate of a chemical reaction is known as a catalyst.

Catalysts work by lowering the activation energy required for the reaction to occur, thereby increasing the reaction rate. They do not undergo any permanent changes during the reaction and can be used repeatedly.

Catalysts can be used in various chemical reactions, including industrial processes, biological systems, and laboratory experiments.

Examples of catalysts include enzymes in biological systems, transition metals like platinum in industrial processes, and acids or bases in chemical reactions.

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1. solute is the substance that is being dissolve,while solvent is dissolving medium

2.saturated is solution that contain maximum amount of solut that capable of being dissolve and supersaturated is solution that contain less amount or medium of solut that capable being dissolve : example vinger

3. is a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. For example, two molecules of hydrogen would be written as 2 H2, and two molecules of water would be written 2 H2O . yes it's can be change only in caseWhen you balance an equation you can only change the coefficients

Answer:

They can use man made materials or they can also have designed areas that people can’t go into

Explanation:

Answer:

D

Explanation:

there are 5 electrons in the outer shell of the first picture

According to electronic configuration, model 1 shows 5 electrons in the outer shell of the atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

uhm

Explanation:

Answer:

i hope this helped

They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid. Prokaryotic organisms have varying cell shapes.

Explanation:

Answer:

Explanation:

The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.

The mass of a substance is the product of its density and volume. Thus, the   mass of the dissolved solids with a density of 125 mg/dm³ with a volume of 250 cm³ is 31.25 mg.

Density of a substance is the measure of its mass per unit volume. Thus it describes how much denser the substance is in a given volume. Mathematically it is the ratio of mass to the volume.

Density of a substance depends on the mass, volume, bond type, temperature and pressure. The ratio of density of a substance with the density of water is called its specific gravity.

It is given that the density of the dissolved solids is 125 mg/dm³ and the volume is 250 cm³ or 0.25  dm³. Thus the mass can be calculated as follows:

density = mass/volume

 mass   = density × volume

             = 0.25  dm³  ×  125 mg/dm³

             = 31.25 mg

Hence, the mass of the dissolved solids in the river wayer is 31.25 M=mg.

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The brass is becoming hotter while the water is becoming colder as a result of the energy transfer from the water to the brass. Because of thermal equilibrium.

Heat is the energy transfer from a temperature that is high to one that is low. The system is said to be in thermal equilibrium when these temperatures equalize and heat no longer flows through it. The absence of substance flowing into or out of the system is another implication of thermal equilibrium.

According to the particle hypothesis, when two substances collide, energy is transferred until both reach the same temperature because warmer substances have particles with higher kinetic energy. An energy transfer from the water to the brass occurs in this instance when the higher kinetic energy brass particles collide with the lower kinetic energy water particles.

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Answer: A) years on Earth are regular periods of three hundred sixty five days each

The criticism of the given idea is that there are  four seasons on Earth only because Earth is tilted at its axis and it goes around the sun.

A season is a division of the year based on changes in weather, ecology, and the number of daylight hours in a given region. On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to undergo hibernation or to migrate, and plants to be dormant.

The Northern Hemisphere experiences most direct sunlight during May, June, and July, as the hemisphere faces the Sun. The same is true of the Southern Hemisphere in November, December, and January. It is Earth's axial tilt that causes the Sun to be higher in the sky during the summer months, which increases the solar flux.

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The absorbance of the  214 mm solution of nickel(ii) chloride can be obtained by fitting it into the regression line of the calibration curve.

During measurements of the concentration of a solution using a spectrophotometer, it is conventional to first calibrate the instrument. The calibration is done by measuring the absorbance of various concentrations of the test solution after measuring the absorbance of the sample blank.

After the instrument has been calibrated, the absorbance of any test solution can now be obtained by fitting it into the regression line of the calibration curve.

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Answer:

Liquid to Gas

Explanation:

The drink in the soda is a liquid and when you open the can, the CO2 leaves the container.

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A student bends a paperclip rapidly back and forth when he touches the point where he was bending the paperclip, he finds that its temperature has increased because temprature goes up at the point of the bending

Temprature is the degree of hotness and coldness and here when student  bends a paperclip rapidly back and forth he touches the point where he was bending the paperclip then the temprature is increases because of temprature goes up at the point of the bending and molecule of clip start moving slower

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Answer:high pressure system and cold fronts

Explanation:

High pressure develops in areas where air cools and sinks. This usually causes fair weather with cool temperatures and few clouds.

Cold fronts occur when warm air is pushed up into the atmosphere by colder air at the ground. These fronts tend to move faster than the other types of fronts and are associated with the most violent types of weather such as severe and super cell thunderstorms, although any type of front can produce these same storms. After a cold front passes it is common to have clear skies and a dramatic change in wind direction on top of the cooler air associated with the front itself.

The law implies that the volume of a gas is directly proportional to the number of moles of the gas is the Avogadro's law.

According to the Avogadro’s law, at the constant temperature and the pressure, the volume of all gases constitutes the equal number of the molecules. This means that in the unchanged conditions of the temperature and the pressure the volume of the gas is directly proportional to the number of the molecules of that gas.

Thus, the Avogadro's law states that the volume of the gas is directly proportional to the number of the moles of the gas.

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a. dinitrogen oxide (N2O)

O=16.00g

N=14.00g * 2 = 28.00g

So NO2 = 44.00g

You have 100g of NO2, you need moles.

So:

100g of NO2 x 1 mol NO2/44g of NO2 = your answer

b. All right. So let's go ahead and convert our 100 grams of stuff. Two moles. So starting with, we have 100 grams, uh, and 20 times we know we're gonna have one more on the top. We need the molar mass. So if we look at our periodic table, nitrogen has a molar mass of 14 point. Oh, sevens will multiply that by two. Since we have two nitrogen in our compound plus 15.999 your period table might be slightly different. That's okay. Just stay consistent with your numbers. If we add those together, we should get 44 point no. 13 grams for everyone. Mole. That's why it's ah conversion factor of the inner calculator and get 2.27 moles into right. And then, um, we have 100 grams of other substance teach your each times we know our one mole from the conversion factor will be on the tops. Wouldn't do that now and then. Carbon 12.1 Um, options. 15.99 and then hydrogen is one point 08 So I had all those together multiply by our sub scripts and get 32 point go for two calculate. That would be 3.12 moles of C H 30 H for the same mass. What this means is that CH. 30 H husband It contains more moles than in 20

Answer:

when CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate which formula is CaCO3.

Ca(OH)2+ CO2------ CaCO3

when excess of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and solution become colourless.

CaCO3+CO2------ Ca(HCO3)

 Example, when sulfur is burned in the air (one of my favorite chemical reactions) it combines with oxygen in the air to form an oxide. We consider this reaction in the form of a chemical equation: S (sulfur) + O2 (oxygen) |> SO2 (sulfur dioxide)

Answer:

One word for this is, raconteur - it means a person skilled in telling anecdotes. anecdotist. narrator,  or storyteller

Explanation:

\(3.4 \times {10}^{ - 12} \)

Multiply first and then divide

Answer:

The physical properties of minerals are related to their chemical composition and bonding. Some characteristics, such as a mineral's hardness, are more useful for mineral identification.

Explanation:

Answer:

Explanation:

mineral properties are what it is made if the characteristics are what it looks like. Like is it shiny, hard, smooth. those are characteristics.

The use of fossil fuels and nuclear fuels are used in the extraction of pure water from seawater as it helps to desalinate the water using different types of techniques.

This is referred to as a material which is used in nuclear power stations to produce heat to power turbines.

Small and medium sized nuclear reactors are mostly used during the process of desalination. This is done by the cogeneration of electricity using low-pressure steam from the turbine and hot seawater feed from the final cooling system in this scenario.

The fossil fuel also ensures that electricity is used to power the turbine which is used in the process thereby making it an important aspect in the extraction of pure water from seawater and is the correct choice.

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Answer: Tendons.

Explanation: A tendon is a fibrous connective tissue which attaches muscle to bone.

Answer:

Myelinated, acetylcholine (ACh)

Explanation:

The theoretical yield is obtained from the limiting reactant in the reaction.

The question is incomplete but I will do my best to help. In a reaction, the theoretical yield is calculated from the limiting reactant in the reaction. Therefore, in order to obtain the limiting reactant, we must first obtain which of the reactants is the limiting reactant.

When that is done, the stoichiometry of the reaction can now be used to calculate the value of the theoretical yield from the number of moles of the limiting reactant.

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Answer:

360

Explanation: