the force that one surface exerts on another when the two rub against each other is called _

Answer:

DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

Answer:

Line 3 is incorrect

Explanation:

In line 3, the statements should be switched. Chemical reactions involve small amounts of energy and nuclear reactions involve enourmous amounts of energy. Lines 1 and 2 are correct.

VOTE ME FOR BRAINLIEST!!

Answer:

Line 3 is incorrect

Explanation:

i took the test and got it right

Answer:

14kg

Explanation:

your equation is wrong ?

it is meant to be c+o=co

we have the mass of c so we calculate the mole and mole =mass\molar mass

molar mass(M) of carbon is 12 so our mole is

6/12=0.5 mol

note the unit of mole is mol

so since from the equation 1c+1o=1co we see that there is an invincible 1 there fore c and co is 1:1 so therefore o.5 mol of c will produce o.5 mol of Co

if the ratio was 1:2 it would have been therefore 0.5 mol of c will make 0.5/2 mol of Co.

but that is not the case so back to what we were saying. note(just saying and example,not part of answer )

to find mass of Co it will be mole = mass/ M

so mass= mole × molar mass and the molar mass of Co is (12)+(16)=28 kg/mol so our mass will be 0.5×28= 14kg

therefore the mass of Co is 14kg

Answer:

Some physical properties of water:

Of course, there are many more but these are some common ones.

Answer:

The new temperature is 213.33 K

Explanation:

Charles's law indicates that the volume of gas at constant pressure is directly proportional to its temperature. This law indicates that if the temperature increases the volume increases and if the temperature decreases the volume decreases.

So, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

\(\frac{V}{T}=k\)

When you want to study two different states, an initial and a final one of a gas, the expression can be applied:

\(\frac{V1}{T1} =\frac{V2}{T2}\)

In this case, you know:

Replacing:

\(\frac{15 L}{640 K} =\frac{5 L}{T2}\)

Solving:

\(T2=\frac{5 L}{\frac{15 L}{640 K} }=\frac{5 L*640 K}{15 L}\)

T2= 213.33 K

The new temperature is 213.33 K

To carry out a boiling point determination accurately, there are certain factors that must be considered.

The factors that can influence the accuracy of a boiling point measurement include:

1. Purity of the substance: The presence of impurities in the substance can cause the boiling point to be higher or lower than the actual boiling point of the pure substance. To ensure accuracy, use a pure sample.

2. Atmospheric pressure: The boiling point of a substance depends on the atmospheric pressure. At higher altitudes, the pressure is lower, and the boiling point is lower. To ensure accuracy, measure and consider the atmospheric pressure during the boiling point determination.

3. Heating rate: If the heating rate is too fast, the temperature may not stabilize, causing inaccurate measurements. To ensure accuracy, heat the substance at a steady and moderate rate.

4. Thermometer calibration: A poorly calibrated thermometer can give inaccurate temperature readings. To ensure accuracy, calibrate your thermometer before use.

5. Heat source stability: A fluctuating heat source can cause the temperature to change rapidly and affect the boiling point determination. To ensure accuracy, use a stable heat source.

In summary, to ensure the accuracy of a boiling point measurement, you should use a pure sample, consider atmospheric pressure, maintain a steady heating rate, calibrate your thermometer, and use a stable heat source.

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The percentage by mass of 0.428 g of K₂CO₃ in 8.58 g of H₂O​ is 4.8%

We'll begin by obtaining the mass of the solution. This is given below:

Mass of solution = Mass of K₂CO₃ + mass of H₂O

Mass of solution =  0.428 + 8.58

Mass of solution = 9.008 grams

Finally, we shall determine the percentage of K₂CO₃ in the solution. Details below:

Percentage = (mass of K₂CO₃ / mass of solution) × 100

Percentage of K₂CO₃ = (0.428 / 9.008) × 100

Percentage of K₂CO₃ = 4.8%

Thus, the percentage of the K₂CO₃ is 4.8%

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Answer:

13.75

Explanation:

Density is equal to mass divided by volume. 110/8 = 13.75

Answer:

Explanation:

Option D is the correct answer

Answer:

okokokokokokookkokkkok

Explanation:

E) The mass number does not change and the atomic number decreases by 1.

In beta decay, a neutron is converted into a proton and a high-energy electron (beta particle), which is emitted from the nucleus.

What is Proton?

A proton is a subatomic particle with a positive electric charge, found in the nucleus of every atom. It is a type of hadron and is composed of two up quarks and one down quark, held together by the strong nuclear force. The number of protons in the nucleus of an atom determines the element it is, and is referred to as the atomic number. The mass of a proton is approximately 1 atomic mass unit (amu), or 1.007276 amu to be more precise.

The number of protons in the nucleus increases by one, while the number of neutrons decreases by one. Therefore, the atomic number increases by 1, while the mass number remains the same.

The electron is emitted from the nucleus, and the atomic number increases by 1 because a new proton is formed. The mass number does not change because the total number of nucleons (protons and neutrons) is conserved. Therefore, the correct answer is E) The mass number does not change and the atomic number decreases by 1 in beta minus decay. In beta plus decay, a proton in the nucleus is converted into a neutron, a positron, and a neutrino. The positron is emitted from the nucleus, and the atomic number decreases by 1 because a proton is converted into a neutron.

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Answer:

2 g/mL

Explanation:

d = m/v

d= 8/4

d=2

hope that helps!

3 moles of NaOH reacts with 1 mole of phosphoric acid.

The moles ratio of the reaction between NaOH and Phosphoric acid is given by the equation of the reaction below:

\(3\:NaOH + H_{3}PO_{4} \rightarrow Na_{3}PO_{4} + 3\:H_{2}O \\ \)

Based on the equation of the reaction, 3 moles of NaOH reacts with 1 mole of phosphoric acid.

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Answer:

Thermal energy refers to the energy contained within a system that is responsible for its temperature.

Answer:

ask a question

research the question

make a hypothesis

do the experiment

collect and record data

arrive at a conclusion

Explanation:

After considering the given  data we conclude that the  statement "The possible energies that electrons in an atom can have are called energy levels" is true. This is verified by many sources such as research articled and study materials.

Energy levels are the fixed energies that electrons in an atom can have. Electrons can move between energy levels by absorbing or emitting energy in the form of photons. The energy levels are located at fixed distances from the nucleus of the atom and are designated by quantum numbers. The lowest energy level is called the ground state, while higher energy levels are called excited states.
Therefore, the statement "The possible energies that electrons in an atom can have are called energy levels" is true.
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The complete question is
The possible energies that electrons in an atom can have are called energy levels. Is the statement true?

The mixture contains a concentration of monoprotic acetic acid of

(8.36 M). (0.0083592 mol/1000 mL = 8.36 M) = 0.258 M x 32.40 mL/1000 L.

Monoprotic acids include benzoic acid (C6H5CO2H), acetic acid (CH3CO2H or HOAc), nitric acid (HNO3), and hydrochloric acid (HCl).

H2SO4 and H3PO4 are examples of polyprotic acids that contain two or three hydrogen ions. Although it is alluring to believe that polyprotic acids are more powerful than monoprotic acids since they include several hydrogen ions, this is not the case.

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The 4.189g of  molecules of o2 are produced when 40.1 g of kclo3 decomposes as shown in the reaction.

What is molecule?

The number of atoms that make up a molecule might vary. Pillows, sheets, and mattress toppers are now part of Molecule's growing line of sleep essentials. To give sleepers a cool, supportive surface, the Molecule AirTEC Mattress Topper blends three layers of open-cell memory foam, AirTEC foam, and polyfoam.

What is reaction ?

A chemical reaction is the transformation of one or more chemicals, known as reactants, into one or more new compounds, known as products. The change in concentration of any of the reactants or products per unit of time can be used to determine the rate or speed of a reaction. It is determined by the equation rate=time + concentration.

Therefore, 4.189g of  molecules of o2 are produced when 40.1 g of kclo3 decomposes as shown in the reaction.

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Answer:

1.iron lead zinc

2)calcium barium magnesium

Answer:

1.5 m/s

Explanation:

105 / 70 = 1.5

Answer:

b. a meadow replacing a pond in it's flood plain

Explanation:

I'ts a secondary succession.

The 20 percent carbon monoxide level is approximately five times more effective for oxygen transport than the 60 percent carbon monoxide level.

Carbon monoxide (CO) is an odorless, colorless and tasteless gas that is toxic to humans and animals. It is produced when fossil fuels such as gasoline, wood, coal, or natural gas are burned. Carbon monoxide is a product of incomplete combustion, when there is not enough oxygen to produce carbon dioxide. In the presence of oxygen, carbon monoxide can be converted to carbon dioxide. In the environment, carbon monoxide is created by the burning of fossil fuels and by natural processes such as forest fires. In the home, carbon monoxide is produced by fuel-burning appliances, such as furnaces, stoves, water heaters, and fireplaces. Inadequate ventilation can allow carbon monoxide to accumulate to dangerous levels. Exposure to high levels of carbon monoxide can cause serious health problems, including death. Symptoms of carbon monoxide poisoning include headache, dizziness, nausea, and difficulty breathing.

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Answer:

Yes, I can see the light traveling through the room before it hits the paper.

Explanation:

edmentum

Since light rays travels in a straight line, the light traveling through the dark room can be seen before it hits the paper.

Light rays refers to a straight line path through which light waves travel.

Light rays travel in a straight line and this phenomenon is known as the rectilinear propagation of light.

In a dark room, the path of light rays travelling in a straight can be seen.

Therefore, the light rays traveling through the room can be seen before it hits the paper.

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Answer:

Nucleus: Choice C

Electron: Choice E

Proton: Choice A

Neutron: Choice B

Energy Level: Choice D

Explanation:

1. Nucleus contains the protons and neutrons.

2. Electrons surround the nucleus and have a negative charge.

3. Protons are positively charged and found in the nucleus.

4. Neutrons have a neutral charge and are found in the nucleus.

5. The energy level refers to the electron orbital.

The RMS speed of a N2 molecule in a gas sample is directly proportional to the square root of temperature. Options a) and b).

Therefore, increasing the temperature of the gas sample will increase the RMS speed of N2 molecules. Similarly, increasing the volume of the container will decrease the density of the gas sample, leading to an increase in the RMS speed of N2 molecules.

However, adding Ar gas to the container while maintaining the same temperature will not have any effect on the RMS speed of N2 molecules as Ar and N2 molecules are different and they do not interact with each other. The RMS speed of N2 molecules depends only on temperature and mass of the molecule, and it remains the same as long as the temperature and mass of the molecule do not change. Answers are Options a) and b).

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Answer:

2

Explanation:

There is a up spin and a down spin electron. They come together to make the net spin 0.

Answer:

Precipitation

Explanation:

Precipitation is when water falls from the clouds back to earth as rain, snow, or hail. The water returns to the rivers to continue the water cycle. So, the answer is D, precipitation.

I hope this helps :)

Answer:

Vapor Information

Explanation:

Atmospheric rivers are relatively long, narrow regions in the atmosphere like rivers in the sky that transport most of the water vapor outside of the tropics. Not all atmospheric rivers cause damage, and most are weak systems that often provide beneficial rain or snow that is crucial to the water supply.

(You're welcome and have a nice day/night Ma'am/Sir.)