2 Points
Which separation technique involves heating the components of a solution to
their boiling points?
A. Separation by distillation
B. Separation by density
C. Separation by chromatography
D. Separation by melting point

The total mass of products obtained in the reaction; CaCO3→CO2​+CaO is  30 grams. Given the reaction; Fe+O2→Fe2O3​, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction.  Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.

According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.  

This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.

The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.

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Answer:

observations (2), (3), and (4) provide strong evidence that a chemical reaction occurred.

Explanation:

Observations (2), (3), and (4) are evidence of a chemical reaction because a precipitate formed, energy was released (the bottom of the beaker felt warm), and bubbles were formed in the water. Observation (1) indicates a physical change, not a chemical reaction.

Answer:

Explanation:

The mass of hydrogen is conserved during cellular respiration as it follows the Law of Conservation of Matter.

Answer:

the law of conservation of matter

Explanation:

The mass of hydrogen is conserved during cellular respiration as it follows the Law of Conservation of Matter.

The Law of Conservation of Matter states that the reactants must equal the products, which is demonstrated through the equation that demonstrates cellular respiration.

C6H12O6 + 6O2 -> 6CO2 + 6H20

This shows that hydrogen has been conserved throughout the entire process (H representing Hydrogen) as the product has the same amount of hydrogen as the reactants.

I think that A or C is the answer.

Answer:

At number 3 i would say it is It is rainfall that is not absorbed into the soil and travel to sea as surface runoff.

Explanation:

Need a Hint?: After precipation occurs, a cycle  known as surface runoff takes the water from the preciptation back into the ocean

(I have a feeling this is right, because I remember from my past education when my teacher talked about the water cycle. Hope this helped)

Answer:

Solid and gas

Explanation:

Answer:

mixture

Explanation:

Answer:

B

Explanation:

Answer:

the awnser is b

Explanation:

Answer:

technology

Explanation:

because people will go to placed with more technology

Answer:

2399.251384

Explanation:

10 moles Ca(ClO)2 to grams = 1429.828 grams

6 moles Ca(ClO)2 to grams = 857.8968 grams

Answer:

This question is so confusing, I'm sorry

Answer:

Helium

Explanation:

Answer:

B

Explanation:

The one step that geologists use to find the epicenter of an earthquake is; They measure the difference between arrival of P waves and S waves.

Discussion;

Scientists use triangulation to find the epicenter of an earthquake. Upon collection of seismic data from at least three different locations, it can be used to determine the epicenter by identifying where it intersects.

On this note, scientists measure the distance between the first P wave and the first S wave.

Read more on earthquakes:

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Answer:

A. Semi-amplitude is half the distance of the peak-to-peak amplitude

Explanation:

The correct answer is : The semi-amplitude is half the distance of the peak-to-peak amplitude (option A). The peak-to-peak amplitude is the total distance between the highest positive peak and the lowest negative peak in a waveform. It represents the full range of variation in the amplitude of the waveform.

The peak-to-peak amplitude of a waveform is the measurement of the total distance between the highest positive peak and the lowest negative peak. It provides information about the full range of variations in the amplitude of the waveform. Mathematically, it is calculated by subtracting the minimum value from the maximum value of the waveform.

Learn more about the amplitude here.

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Answer:

"Yes," a moving skateboard has energy.

When the skater seems to be in motion or throughout a movement, the potential energy converts itself into the kinetic form of energy, and then it becomes potential energy again.

Furthermore, somewhere after every movement, the same skateboarder was around a similar height, — in other words thus every time it is equally powerful.

The response is thus the right one.

Explanation:

Answer:

Ionic bonds can be important to protein structure because they are potent electrostatic attractions. In the hydrophobic interior of proteins, ionic bonds can even approach the strength of covalent bonds

Covalent bonds in amino acids are useful to stabilize the structure of the proteins and their interactions. The ionic bond formed as the atoms in amino acids with opposite charges accompanied strong electrostatic attractions.

Proteins are 3D structures of amino acids that are further made of an amine and a carboxyl group, and are arranged in specific structures in four levels to give rise to the complete protein molecule.

Proteins can be described as the polymers of polypeptides which are structured by arrangements of these chains in a three-dimensional structure. They are folded and are driven by special non-covalent interactions such as peptide bonds, ionic bonds, hydrogen bonds, Van der Waals interaction, and disulfide bridges.

The primary structure is the sequence of amino acids through peptide bonds to form a polypeptide chain. The secondary structure is a sub-structures made by hydrogen bonding between the main chain peptide groups on the polypeptide backbone chain.

Tertiary structure is the 3D arrangement of protein in which α and β helices are folded into a globular structure with the interactions such as hydrogen bonds, salt bridges, disulfide bonds, and tight packing of side chains.

Learn more about protein structure, here:

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Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

Answer: what kind of rocks are we talking about size type or weight?....

if your gonna ask a question make it more clear:

Answer: Must be a trick question.

Explanation: All of these are a function of the integumentary system.

Answer: (Q1) B.      (Q2)  D.    (Q3) B. I believe   (Q4) C.

Explanation: (Q3) B the medulla isn't playing a physical part in digestion as much as it controls the process this is a educated guess  

Answer:

nah its NOT

Explanation:

Answer:

yes a balanced chemical equation

it follows law of mass action that states mass can neither be created nor destroyed

Velocity vs. Time shows an objects acceleration because... in Position vs. Time the line does not go through the origin and it’s very uneven, But Velocitu vs. time goes through the origin and has straight lines.

Answer:

B.

Explanation:

Because the lines are vertical no so wormy like.

Answer:

A

A

A

T

G

C

G

G

T

A

C

T

Explanation:

A goes with T

T goes with A

G goes with C

C goes with G

Answer:hello friend!

Explanation:

IM not sure what your talking about but ima try the best i can

So lets go to newtons laws of motion, basically he said, more force, more movement. But it depends on how heavy the object is.

Sooo The more heavy the box of sand is, The more force he would have to use to move it. You can also relate this to how much he wnted to move it :)

Sorry if this didnt help :(

Answer/Explanation:

Passive Transport:

The movement of particles across a cell membrane without the use of energy by the cell is called passive transport. During passive transport, particles move from an area of high concentration to an area of low concentration. Diffusion and osmosis are examples of passive transport.

Diffusion- Particles travel from where they are crowded to where  they are less crowded. This movement from areas of high concentration (crowded) to areas of low concentration (less crowded) is called diffusion. An example is the diffusion of food coloring in water. The particles of food coloring start tightly packed together and then move to areas where there is less food coloring until the whole container of water has food coloring throughout. Diffusion also happens within and between living cells. Cells do not need to use energy for diffusion.

Osmosis-The cells of organisms re surrounded by and filled with fluids that are made mostly of water. The diffusion of water through cell membranes is so important to life processes that it has been given a special name-molecules. when you mic something, such as food coloring, sugar, or salt, with water, you lower the concentration of water molecules. Water molecules can move through a membrane that is semipermeable , which means that only certain substances can pass through. Over time, the water molecules move from the liquid with the high concentration of water molecules to the liquid with the lower concentration of water molecules. Osmosis is important to cell functions. If red blood cells were in pure water, water molecules would flood into the cell and cause them to burst. When red blood cells are put into a salt solution, the concentration of water molecules inside the cell is higher than the concentration of water outside. The difference makes water move out of the cell, and the cells shrivel up.

Active Transport:

A process of transporting particles that requires the cell to use energy is called active transport. Active Transport usually involves the movement of particles from an area of low concentration to an area of high concentration.

Endocytosis and Exocytosis: The active transport process by which a cell surrounds a large particle, such as a large protein, and encloses the particle in a vesicle to bring the particle into the cell is called endocytosis. Vesicles are sacs formed from pieces of cell membrane. when large particles, such as wastes, leave the cell, the cell uses an active transport process called exocytosis. During exocytosis, a vesicle forms around a large particles within the cell. The vesicles carries the particle to the cell membrane. The vesicles fuses with the cell membrane and releases the particle to the outside of the cell. Transport protein are some proteins in the cell membrane of cells that use energy to open and close to allow particles to move across the membrane. The particles are typically moving from an area of low concentration to an area of high concentration. ATP is what is used to open and close the transport protein.

[RevyBreeze]

Answer:

⬇️

Explanation:

A:

Subatomic particles that are carbon atoms, isotopes and ions have in common are protons. A regular carbon isotope like carbon 13 and carbon ion all have the same number of protons in the atomic nuclei.

B:

Isotope's are versions of a particular element that have a different number of neutrons, while ions are atoms (can be molecules too) that have lost or gained electrons that have an electrical charge. These two also have a different amount of neutrons.

Isotopes have neutrons

Ions involve electrons

Hope that helps! <3

Answer:Differences between atoms ions and isotopes

Isotopes are versions of a particular element that have different numbers of neutrons. Ions are atoms (or molecules) that have lost or gained electrons and have an electrical charge. Isotopes involve neutrons. Ions involve electrons.

Explanation:Differences between atoms ions and isotopes

Isotopes are versions of a particular element that have different numbers of neutrons. Ions are atoms (or molecules) that have lost or gained electrons and have an electrical charge. Isotopes involve neutrons. Ions involve electrons.