Answer:
mixture is created when two or more different substances are physically combined and can be separated back into its original substances. A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.
PLEASE HELP ME WITH THESE!!
pls help me its science
Answer: solids were liquds the form changes but it is still the same thing
Explanation:
PLEASE HELP THIS IS DUE AT MIDNIGHT!! UH HELP
Answer:
lolololololololololololol
Explanation:
A sturdy plant is placed in an airtight, transparent container. The entire experiment is then weighed. For 10 days, the plant grows inside the container. After 10 days, the container is weighed again. The air inside the container is pumped out and carefully analyzed.
What is true about the air inside the container and the mass of the experiment?
-The air is richer in carbon dioxide. The mass of the experiment has not changed.
-The air is richer in oxygen. The mass of the experiment has changed.
-The air is richer in carbon dioxide. The mass of the experiment has changed.
-The air is richer in oxygen. The mass of the experiment has not changed.
PLEASE HELPPPPP
Plants release oxygen by photosynthesis and consume carbon dioxide for it. Thus the air after the experiment will be rich in oxygen but the mass of the container dose not change.
What is photosynthesis?Photosynthesis is a biochemical process by which green plants produce glucose and oxygen with the aid of light energy. Combination of water and carbon dioxide results in the formation of glucose and molecular oxygen.
By photosynthetic reaction, the air will be rich in oxygen and some fraction of carbon dioxide in the atmosphere will be consumed by plants. That's why this process is said to be an event in carbon cycle.
The mass of the container in the experiment does not change, whereas, the air collected will contain more oxygen than before which is released by the plants.
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Why are the muscles that move food through your digestive track called involuntary muscles?
Answer:
because you cannot control them voluntarily
Explanation:
sorry if wrong
True or False
Low, gray, layered clouds that cover the sky and bring steady rain are nimbostratus clouds.
Answer:
true
Explanation:
it indicates a steady rain therefore true
based on the following chart,which statement
below is not true
Answer:
D) The particles in lead are more spread out than those in corn oil.
Explanation:
The higher density an object has, the less spread out the particles in the object is. SInce lead's density is 11.35 and corn oil's density is 0.90, corn oil's particles would be more spread out.
what is the physical state of the products in MgCl2(aq)+2Na(s) -> 2NaCl(aq)+Mg(s)
Answer:
In your example, sodium reacts with magnesium chloride in a single displacement reaction.
When a substance melts it is said to go through all of the following except:
A. phase change
B. physical change
C. chemical change
D. temperature change
Melting is not a chemical change. It is a physical change involving the transition from solid to liquid without altering the chemical composition of the substance. The correct option is C.
Melting is indeed a phase change, as the substance transitions from a solid phase to a liquid phase.
Melting is a physical change because the substance's molecular arrangement changes from the ordered structure of a solid to the less ordered structure of a liquid, but the chemical composition remains the same.
Melting is not a chemical change. In a chemical change, the substance undergoes a transformation at the molecular or atomic level, resulting in the formation of new substances with different chemical properties. Melting involves a change in physical state.
Melting involves a temperature change. The temperature remains constant during the melting process, as the heat energy is used to break the intermolecular forces holding the solid together rather than increasing the temperature of the substance.
Therefore, melting is a physical change involving the transition from solid to liquid without altering the chemical composition of the substance. The correct option is C.
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Help someone pls and thank u
Answer:
The cell membrane is semi-permeable - it controls what can enter and leave the cellRibosomes make proteinsHope this helps!
Is the Sun a mixture, solution, compound, or none?
how do atoms combine to form extended structure?
Answer:
lose or share electrons in such a way that the outer shells become chemically complete
Explanation:
Most interactions among atoms take place in the outermost shell of each atom. The number of each electron in this shell determines how an atom combines with other atoms to form compounds. When atoms combine they gain, lose or share electrons in such a way that the outer shells become chemically complete.
The molecules of a liquid are weakly bonded.
True False
Answer:
True. because molecules are chemical combinations of 2 or more atoms. And atoms combine by sharing electrons.
Answer:
True
Explanation:
Hope this helps!
someone please help I'm full of assignments.
What rule of magnetism is illustrated by the lines of the iron filings in Step 12?
What rule of magnetism is illustrated by the lines of the iron filings in Step 15?
Why was glass or plastic used to separate the filings from the magnets in the experiments?
Did the glass or plastic stop the passage of the magnetic lines of force?
Did the iron filings almost or completely bridge the open end of the horseshoe magnet?
So, here are the steps:
These supplies are needed:
two bar magnets
one horseshoe magnet
iron filings
sheet of glass or plastic
several sheets of paper
Bar Magnet
1. Place the bar magnet on a table.
2. Put a sheet of glass or plastic over the magnet.
3. Sprinkle the iron filings over the sheet evenly.
4. On a separate paper, sketch the magnet. Show the lines made by the iron filings.
Horseshoe Magnet
5. Place a horseshoe magnet on the table.
6. Put a sheet of glass or plastic over the magnet.
7. Sprinkle the iron filings over the sheet.
8. On a separate paper, sketch the magnet. Show the lines made by the iron filings.
N Pole to N Pole
9. Place two bar magnets N pole to N pole with an inch between them.
10. Put a piece of glass or plastic over the magnets.
11. Sprinkle the iron filings over the glass or plastic.
12. On a separate paper sketch the magnets. Show the lines made by the iron filings.
N Pole to S Pole
13. Turn one of the bar magnets around so the magnets are N pole to S pole with an inch between.
14. Sprinkle the iron filings over the glass or plastic.
15. On a separate paper sketch the magnets. Show the lines made by the iron filings.
Answer:
The most basic law of magnetism is that like poles repel one another and unlike poles attract each other; this can easily be seen by attempting to place like poles of two magnets together
How is mass conserved during photosynthesis?
-The mass of the reactants (carbon dioxide and water) is the same as the mass of the products (oxygen and sugar).
-The mass of the reactants (carbon dioxide and water) is different from the mass of the products (oxygen and sugar).
-The mass of the reactants (carbon dioxide and oxygen) is the same as the mass of the products (water and sugar).
-The mass of the reactant (carbon dioxide) is different from the mass of the products (water, oxygen, and sugar).
HELP PLEASE
Answer:
-The mass of the reactants (carbon dioxide and oxygen) is the same as the mass of the products (water and sugar).
Explanation:
Certified Educator The law of conservation of mass states that in a chemical reaction, mass is neither created nor destroyed. That means, the total mass for the reactants needs to equal the total mass of the products. The reactants for photosynthesis are 6 carbon dioxide, 6 water and sunlight.
Answer:
Pizza is great
Explanation:
I think this because pizza toppings are also packed with a compound called glutamate, which can be found in the tomatoes, cheese, pepperoni and sausage. When glutamate hits our tongues, it tells our brains to get excited and to crave more of it. This compound actually causes our mouths to water in anticipation of the next bite.
