Help me please
…. Thank you

Answer 1 :

\(\green{\sf{D \: and \: E}}\)

Step-by-step explanation:

As per graph, the highest lines are D and E. They are increasing.

Answer 2:-

\(\sf{\blue{B \: and \: C}}\)

Step-by-step Explanation:

It is because the line between B and C is straight, indicating that it is steady.

Answer 3:-

\(\sf{\pink{2 \: m/s}}\)

Step-by-step Explanation:

Its because the interval between line CD can be taken as-

\(\sf{40-50 = 1 m/s} \\ \sf{50-60 = 2 m/s}\)

Hence, 2 m/s.

Answer 4:

\(\sf{\red{A \: and \: E}}\)

Step-by-step Explanation:

We can see from the graph that the change in lines us occurring between initial and final points, i.e., between A and E.

Answer 5:

\(\sf{\purple{1m/s}}\)

Step-by-step Explanation:

This is because, we can consider the interval between points D and E as :-

\(\sf{60-70=1m/s}\)

Compared to air or water, steel has the fastest sound propagation speed.

Vibrations known as sound waves travel through a medium like air, water, or solid things. As an object vibrates, the surrounding medium's molecules follow suit, causing a disturbance that travels across the medium as a wave of pressure changes. The human ear interprets these pressure changes as sound.

Solids, especially those with densely packed molecules and high densities, allow sound waves to travel the fastest. In contrast to air or water, sound waves move through steel the fastest.

In comparison to the speeds of sound in air and water, which are respectively 343 and 1,484 meters per second, respectively, in steel, the speed of sound is approximately 5,960 meters per second.

To know more about sound waves, visit:

https://brainly.com/question/11797560

#SPJ1

Hydrophobic colloids option b- can be stabilized by adsorption of ions.

Hydrophobic colloids are colloidal particles that repel water molecules and tend to aggregate or coagulate in aqueous solutions. To stabilize hydrophobic colloids, surfactants or stabilizing agents are added to the system.

These surfactants have hydrophobic and hydrophilic regions that can adsorb onto the surface of the colloidal particles, forming a protective layer that prevents their aggregation. This adsorption of surfactant molecules on the particle surface is commonly referred to as "stabilization by adsorption of ions".

The surfactant molecules adsorb onto the particle surface with their hydrophobic tails pointing inward towards the particle surface and their hydrophilic heads pointing outward towards the solvent, creating a stable colloidal dispersion. This stabilization mechanism is commonly used in the formulation of emulsions, suspensions, and other colloidal systems.

learn more about colloidal particles here:

https://brainly.com/question/11640006

#SPJ4

Answer:

They then put a balloon on top of the bottle immediately after adding them together. The student observed that the balloon inflated and got larger.

Explanation:

Btw brainliest me plss

Answer:

The student's prediction is wrong.  Mass cannot be spontaneously created.

Explanation:

Sorry, but all the other answers are wrong. They didn't even come close to answering your question. This question concerns ourselves with the law of mass conservation. This states that, in a reaction, the total mass of the reactants must equal the total mass of products formed after the reaction. For instance, if the mass of the reactants both weighed 5 grams, then the products, if you measured their weight afterwards, would be 5 grams. The reaction does not generate new mass at the end of the reaction, this cannot be done for any reaction, let alone this one. Thank you!

Decanting the sample onto the center of a filter paper after assembling the filtering device for an organic combination to start the separation process.

To transfer (a water, like wine) from one container into another by drawing out the liquid without upsetting the sediment or perhaps the lower layers before the meal, the wine was decanted. to move, unload, or pour out something.

Oil and Water: On water, oil floats. After allowing an oil / water mixture to settle for a while, the oil can be poured off of the water. A separatory funnel can be used to separate the water and oil. Cleansing murky water with decantation is one method.

To know more about decanting visit:

https://brainly.com/question/29328624

#SPJ4

Answer:

D. Thermal conduction is blocked by the flip-flops.

Explanation:

Convection is a process of heat transfer which involves fluids( liquid or gas). This however rules convection out of the answer.

Radiation involves heat transfer from the sun to bodies on earth.

Conduction involves heat transfer between two solid bodies. Hot beach sand and flip-flops are solid bodies which validates thermal(heat) conduction.

Answer:

250 ml

Explanation: I got it right on the lab.

The size of the volumetric flask that would you use to create a 1.25 M solution using 29.75 g of MgCl₂ is 250mL.

How do we calculate volume of the solution?

Volume (V) in liter of the solution will be calculated by using the molarity (M) formula as:

M = n/V, where

n is the moles of the solute and it will be calculated by using mass as:

n = W/M, where

W = given mass

M = molar mass

Moles of 29.75g of MgCl₂ = 29.75g / 95g/mol = 0.313 mol

Given that molarity of solution = 1.25M

On putting values on the equation of molarity we will get the value of volume as:

V = 0.313 / 1.25 =  0.2504 L = 250mL

For the preparation of 250 mL of MgCl₂ solution we required the volumetric flask of 250 mL.

Hence volumetric flask of 250mL is required.

To know more about volumetric flask, visit the below link:
https://brainly.com/question/24196698

#SPJ2

(1a) 3-Chlorophenol is more acidic than cyclopentanol (chlorine atom electron-withdrawal). (1b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol (stronger carboxylic acid group).

(2a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol (hydrogen bonding ability). (2b) Cyclohexanol is more soluble in water than chlorocyclohexane (hydroxyl group enables hydrogen bonding).

Part 1: Comparing Acidic Strength

a) 3-chlorophenol is more acidic than cyclopentanol. This is because the presence of a chlorine atom in 3-chlorophenol can stabilize the negative charge on the phenoxide ion through inductive and resonance effects, making it more stable and easier to form.

b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

c) 2,2-dichlorobutan-1-ol is more acidic than butan-1-ol. The presence of the electron-withdrawing chlorine atoms in 2,2-dichlorobutan-1-ol enhances the acidity by stabilizing the negative charge on the alkoxide ion formed upon deprotonation.

d) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

Part 2: Comparing Solubility in Water

a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol. Propan-2-ol has a hydroxyl group (-OH) that can form hydrogen bonds with water molecules, increasing its solubility.

b) Cyclohexanol is more soluble in water than chlorocyclohexane. The presence of the hydroxyl group in cyclohexanol allows for hydrogen bonding with water molecules, enhancing its solubility. Chlorocyclohexane, on the other hand, is nonpolar and lacks the ability to form significant hydrogen bonds with water.

c) Cyclohexanol is more soluble in water than phenol and 4-methylcyclohexanol. Both cyclohexanol and phenol can form hydrogen bonds with water, but phenol's aromatic ring reduces its solubility. 4-methylcyclohexanol is also less soluble than cyclohexanol due to the steric hindrance from the methyl group, which disrupts hydrogen bonding.

To know more about the aromatic ring refer here,

https://brainly.com/question/32170261#

#SPJ11

The mole ratio of PbO2 to water in the given chemical reaction is 1:2.

According to the balanced chemical equation, for every 1 mole of PbO2 (lead dioxide), 2 moles of H2O (water) are produced. This can be seen from the coefficients in the equation, where the stoichiometric ratio is 1:2 between PbO2 and H2O.

The balanced equation represents a redox reaction that occurs within a car battery. In this reaction, lead (Pb) and lead dioxide (PbO2) react with sulfuric acid (H2SO4) to produce lead sulfate (PbSO4) and water (H2O). The mole ratio of reactants and products is determined by the coefficients in the balanced equation.

In this case, the coefficient of PbO2 is 1, indicating that 1 mole of PbO2 is consumed. The coefficient of H2O is 2, indicating that 2 moles of H2O are produced. Therefore, the mole ratio of PbO2 to water is 1:2, meaning that for every mole of PbO2, 2 moles of water are produced as a result of the chemical reaction.

for such more questions on reaction

https://brainly.com/question/25769000

#SPJ8

The compound that was added to the Miller-Urey experiment to allow pre-cell enclosures to form was ammonia.

In the Miller-Urey experiment, Stanley Miller and Harold Urey aimed to simulate the conditions of the early Earth's atmosphere to investigate the origins of life. They created an apparatus that contained a mixture of gases, including methane, ammonia, hydrogen, and water vapor. The mixture was then exposed to an electric spark to simulate lightning, and the resulting products were analyzed.

Ammonia played a crucial role in the formation of pre-cell enclosures, such as lipid bilayers, which are essential components of cell membranes. The ammonia in the mixture reacted with the other gases and water vapor to produce a variety of organic compounds, including amino acids, which are the building blocks of proteins. The amino acids then polymerized to form long chains, which eventually led to the formation of lipids. These lipids could then self-assemble into enclosed structures, such as vesicles, that are similar to the cell membranes of modern cells.

Overall, the addition of ammonia to the Miller-Urey experiment played a significant role in creating the conditions that allowed for the formation of pre-cell enclosures, which are critical steps in the origins of life.

To learn more about lipid bilayers click here : brainly.com/question/26652408

#SPJ11

=> 0.25 M

The question is asking us to find the molarity/concentration of the acid (HCl).

We have been provided with;

12.50 mL of 0.20 M NaOH

10.0 mL of HCl

We know that molarity (M) of a solution is contained in 1 L or 1000 mL or 1000 cm³.

This means that;

0.20 M is contained in 1000 mL.

X mol is contained in 12.50 mL

\( x \: mol \: = \frac{12.50 \times 0.20}{1000} \\ = 0.0025 \: moles\)

= 0.0025 moles

These 0.0025 moles is contained in 10 mL of HCl.

To find the molarity of the acid;

0.0025 moles is contained in 10 mL

x mol is contained in 1000 mL

\(x \: mol \: = \frac{0.0025 \times 1000}{10} \\ = 0.25 \: mol\)

= 0.25 M

Therefore the Concentration of the acid (HCl) is 0.25 M

Fe2S3 is The Empirical Formula Of A Compound Containing 53.70% Iron And 46.30% Sulfur.

Fe = 0.961 mol and S = 1.44 mol, Now divide them to get lowest empirical formula. When the subscripts in a chemical formula represent the simplest ratio of the kinds of atoms in the compound, the formula is called an empirical formula.

Most ionic compounds are described with empirical formulas. A molecular formula describes the actual numbers of atoms of each element in a molecule. A compound that contains ions and is held together by ionic bonds is called an ionic compound. The periodic table can help us recognize many of the compounds that are ionic:

When a metal is combined with one or more nonmetals, the compound is usually ionic. This guideline works well for predicting ionic compound formation for most of the compounds typically encountered in an introductory chemistry course. However, it is not always true (for example, aluminum chloride, AlCl3, is not ionic).

To know more about empirical formula here

https://brainly.com/question/1439914

#SPJ4

Samantha can separate the mixture of titanium dioxide from the liquid by the method of filtration using a filter paper.

Mixtures are substances consisting of two or more substances physically mixed together.

Mixtures can be separated by physical methods.

Titanium dioxide and water is a mixture.

Since titanium dioxide is insoluble in water, it can be easily separated by filtration.

Therefore, Samantha can separate the titanium dioxide from the liquid by the method of filtration using a filter paper.

Learn more about filtration at: https://brainly.com/question/552187

#SPJ1

The total number of carbon atoms on the right-hand side of the chemical equation is 6.

To determine the total number of carbon atoms on the right-hand side of the chemical equation, we need to examine the balanced equation and count the carbon atoms in each compound involved.

The balanced chemical equation is:

6 CO2(g) + 6 H2O(l) → C6H12O6(s) + 6 O2(g)

On the left-hand side, we have 6 CO2 molecules. Each CO2 molecule consists of one carbon atom (C) and two oxygen atoms (O). So, on the left-hand side, we have a total of 6 carbon atoms.

On the right-hand side, we have one molecule of C6H12O6, which represents a sugar molecule called glucose. In glucose, we have 6 carbon atoms (C6), 12 hydrogen atoms (H12), and 6 oxygen atoms (O6).

Therefore, on the right-hand side, we have a total of 6 carbon atoms.

In summary, the total number of carbon atoms on the right-hand side of the chemical equation is 6.

Learn more about carbon atoms here:

https://brainly.com/question/917705

#SPJ11

Answer:i think it is 350°F

Explanation:

Biomass is a fuel source made from the byproducts of the agricultural industry such as leftover straw from fields of grain, vines from pumpkin farms, or wood chips from lumber processing.

Explanation: Fuel is a substance or material that undergoes a combustion reaction to release energy. It is commonly used to power various forms of machinery, vehicles, and heating systems. The energy released during the combustion of fuel is typically harnessed in the form of heat, light, or mechanical work.

The choice of fuel depends on various factors such as availability, cost, energy content, efficiency, and environmental considerations. As concerns about climate change and environmental impact grow, there is a shift towards exploring and adopting cleaner and more sustainable fuel alternatives, including renewable and low-carbon options.

It is worth noting that the combustion of fuels can release byproducts and emissions, such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter, which can have environmental and health implications. Efforts are being made to develop technologies and practices to minimize the negative impacts associated with fuel consumption and combustion processes.

Biomass is a fuel source made from the byproducts of the agricultural industry such as leftover straw from fields of grain, vines from pumpkin farms, or wood chips from lumber processing.

To know more about combustion visit:

https://brainly.com/question/8242764

#SPJ11

Answer:

fe3o4+4h2 - 3fe + 4h2o

therefore coefficient is 4

Answer:

true

Explanation:

osmosis is a special case of diffusion. diffusion occurs across a semipermeable membrane and only the water or other solvent moves. Diffusion and osmosis are both passive transport processes that act to equalize the concentration of a solution.

Osmosis is one of the special type of diffusion. Only the water or other solvent moves when a semipermeable membrane is in use for diffusion.

Diffusion is defined as the migration of molecules down a concentration gradient from an area of higher concentration to a region of lower concentration.

There are two types of diffusion.

Osmosis is defined as the transfer of solvent via a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

There are two types of osmosis.

Thus, osmosis is one of the special type of diffusion. Only the water or other solvent moves when a semipermeable membrane is in use for diffusion.

To learn more about diffusion, refer to the link below:

https://brainly.com/question/24746577

#SPJ12

Answer:

Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity

Explanation:

Answer:

yes this above answer is right

A mutagen is a chemical or physical agent capable of inducing changes in DNA, leading to mutations.

Mutagens can alter the genetic material by causing changes in the DNA sequence, such as substitutions, deletions, insertions, or rearrangements. These changes can result in the formation of new alleles or the disruption of normal gene function.

Examples of mutagens include certain chemicals, such as certain pesticides, tobacco smoke, and certain chemotherapy drugs. Physical agents like ionizing radiation (e.g., X-rays, gamma rays) and ultraviolet (UV) radiation from the sun or tanning beds can also induce DNA mutations.

It is important to note that not all mutagens are harmful. Some mutations can be beneficial, leading to genetic variation and adaptation in populations, while others may have detrimental effects, such as contributing to the development of diseases like cancer.

To know more about mutagen refer here :    

https://brainly.com/question/13960165#

#SPJ11                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

Answer:

The defect of vision suffered by the person is Myopia

Explanation:

The person can't see farther objects but is able to read a book which is placed closely to the eyes, using these observations the person is suffering from MYOPIA(nearsightedness) in which observer see close objects clearly but farther objects appear blurred.

The light entering the eye isn't correctly bent, the eyeball becomes big , or the eye lens become too converging, which converges the light ray in front of the cornea

This defect can be cured by using concave lenses.

Matter and energy are conserved in nature through their use by biological systems, which is dedicated by the Law of conservation.

Matter and energy conservation indicate that organisms can not create or destroy these elements in nature.

Matter and energy conservation are fundamental for maintaining the state of equilibrium (homeostasis) of biological systems.

In conclusion, matter and energy are conserved in nature through their use by biological systems, which is dedicated by the Law of conservation.

Learn more about matter and energy here:

https://brainly.com/question/23490755

#SPJ1

Answer:

Butane

Explanation:

the name is butane and if u need longterm help in Organic Chemistry u can add me

CH3–CH2–CH2–CH3

It can help us identify a molecule based on its formula to draw it out. (See the image below.)

Now, we can identify any functional groups present in the molecule. As you can see, there are no outstanding features in this molecule. It is comprise of 4 carbons single bonded to each other and also bonded to hydrogen atoms.

This type of organic molecule is called an alkane. They end in the suffix -ane.

The root of the word can be determined based on the number of carbons in the carbon chain: 4 in this case. It would be "but".

Therefore, this compound is called butane.

1. If you change the surface area of an alka-seltzer tablet, then the reaction rate will be fastest for the whole tablet of alka-seltzer.

2. If you change the temperature of water, then the reaction rate will be fastest for the tablet of alka-seltzer in the hot water.

3. If you change the volume of water, then the reaction rate will be fastest for the tablet of alka-seltzer in the least amount of water.

1. Changing the surface area of an alka-seltzer tablet will result to a faster reaction rate. This is because the greater the surface area, the more contact the tablet will have with the water, and therefore, the faster the reaction will occur.

2. This is because increasing the temperature of the water increases the kinetic energy of the molecules, which in turn increases the speed of the reaction.

3. This is because the less water there is, the more concentrated the solution is, which allows for more contact between the tablet and the water, resulting in a faster reaction.

Learn more about reaction rate here: https://brainly.com/question/24795637

#SPJ11

Answer:

A

Explanation:

The carrot itself was made up of the same chemical bonds and chemicals even when it was cut but it was cut affecting the form/shape

In chemical changes, the object undergoes a change where the chemicals themselves undergo a change

The medication can treat people who have the disease described. According to the commercial, the drug has FDA approval to treat a condition whose symptoms are listed.

Additionally, the narrator notes that the medication only comes with a prescription and has 1% of the active substance. We can deduce from this information that the drug can effectively treat persons who have the condition generating these symptoms, but obtaining it requires a prescription. The commercial provides no support for the other possibilities.

Therefore, the correct option is D.

Learn more about Medication, here:

https://brainly.com/question/11098559

#SPJ1

1 day = 1440 minutes

2 days = 2880 minutes

2 days = 62 words per minute× 2880 minutes

2 days = 178560 words

Therefore she can type 178560 words in 2 days if she can type at 62 words per minutes

Answer: 0.9398 Liters

Explanation:

Charles' Law

V1/ T1 = V2/T2

0.75/35 = ?/113

0.75/35 = 0.9398/113

Your answer is option b

i.e. Red

because refractive index of red is more as compared to green, yellow and violet...

Answer:

D: but see below.

Explanation:

There are two main disadvantages to a pneumatic  system

1. They require a compressor of some sort.

2. They can be slow to respond.

That makes car brakes the choice of engineers to be the hydraulic system a far superior choice for automobiles.

A car usually has to stop quickly and efficiently.

A: hydraulic systems generally do not provide a cushioning effect. I would say A is not what you want.

C. Hydraulic systems are quick to respond. The answer is not C

D. Work well at all Temperature ranges. They better do this. A few days ago the outside temperature where I live reached - 40. The summer can reach plus 30 C. That's a range of 70 degrees. They better work over this range.

Unfortunately B is also true. I think you are intended to pick B, but D is also true. Perhaps the    question means a greater range than 70 degrees. If that is so, B is really your better answer.