Is mass conserved in chemical reactions?
Answer:
Mass is not conserved in chemical reactions. ... This means that the total mass and energy before a reaction in a closed system equals the total mass and energy after the reaction. According to Einstein's famous equation, E = mc2, mass can be transformed into energy and energy can be transformed into mass.
Explanation:
Answer:
Mass is not conserved in chemical reactions. The fundamental conservation law of the universe is the conservation of mass-energy. This means that the total mass and energy before a reaction in a closed system equals the total mass and energy after the reaction. According to Einstein's famous equation, E = mc2, mass can be transformed into energy and energy can be transformed into mass. This is not some exotic process, but in fact happens every time there is a reaction. Mass is therefore never conserved because a little of it turns into energy (or a little energy turns into mass) in every reaction.
discuss the problems which farmers face who cultivate crops on hilly or mountainous areas
Answer:
The soil getting washed away
Explanation:
How does the nervous system work together with the digestive system?
Explanation:
The autonomic nervous system controls the tone of the digestive tract. The brain controls drinking and feeding behavior. The brain controls muscles for eating and elimination. The digestive system sends sensory information to the brain.
Is this right? NEED HELP ASAP
Answer:
They all seem to be correct, good job!
Answer:
Correct
Explanation:
Which statement describes the movement of water when a cell swells up and bursts due to osmosis?
Group of answer choices
The cell membrane used energy to move water into the cell through passive transport.
The cell membrane used energy to move water out of the cell through passive transport.
Water went out of the cell because the concentration of water inside the cell was higher than the concentration outside the cell.
Water went into the cell because the concentration of water inside the cell was lower than the concentration outside the cell.
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Question 9
Answer:
water went into the cell because the concentration of water inside the cell was lower than the concentration outside the cell.
Answer:
D. Water went into the cell because the concentration of water inside the cell was lower than the concentration outside the cell
1. The least reactive elements on the periodic table are the _____________ (high number of valence electrons)
2. What makes a reactive metal reactive?
3. What makes a nonreactive noble gas nonreactive?
These are all the questions I need help with (plzzz help mee)
Explanation:
1. the noble gases because they have a full valence shell
2.the amount of valence electrons
3. they have a full valence shell and dont need any more electrons
Which of these organelles is responsible for protein synthesis?
Answer:
I would have to say either ribosomes or mitochondria.
Answer:
the ribosomes :)
Explanation:
easy apes question help pls
Answer:D
Explanation:
The asteroid would have caused sever heat in the atmosphere and elinate most of the water so i is severe climate change
Answer:
D : The asteroid would have caused sever heat in the atmosphere and elinate most of the water so i is severe climate change
Explanation:
The percentage of a hunter-gatherer society’s diet provided by hunting versus gathering was mostly determined by _______.
a.
the climate
b.
the types of prey
c.
hunting skill
d.
the size of the human population
Answer:
a. the climate
Explanation:
one factor in the formation of hurricanes and tornadoes that is the same?
Perhaps the only similarity between tornadoes and hurricanes is that they both contain strong rotating winds that can cause damage. There are many differences between tornadoes and hurricanes. The largest tornado every observed was 4 km (2.5 mi) wide, and most tornadoes are < 0.8 km (0.5 mi) wide.
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How could you test your hypothesis?
Find the total mass of the water and the dry
pasta, then cook the pasta and measure the
mass of the cooked pasta and the water in
which it is being cooked.
Find the mass of the dry pasta, then cook the
pasta, drain it, and find the mass of the
cooked pasta.
Answer:
Explanation:
Find the total mass of the water and the dry pasta, then cook the pasts and measure the mass of the cooked pasta and the water in which it is being cooked.
If plant has the same amount of sunlight but less water, then the process of glucose would A- increase, B-decrease, C- stay the same
A topographic map is a two-dimensional model that uses contour lines to represent points of equal
1
barometric pressure
2
temperature gradient
3.
elevation above sea level
4
magnetic force
Answer:
3. elevation
Explanation:
Which of the following is the distinguishing feature of prokaryotic cells?
Prokaryotic cells have a nucleus.
Prokaryotic cells do not have a cell wall.
Prokaryotic cells do not have a nucleus.
Prokaryotic cells have mitochondria.
Answer: The answer is C
A prokaryotic cell usually lack a well defined nucleus. The correct option is C.
What is a prokaryotic cell?A prokaryotic cell is one that lacks a true nucleus and membrane-bound organelles.
The prokaryotic cell is the foundation of organisms in the domains Bacteria and Archaea.
Thus, the correct option is C.
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Write the complementary RNA strand to the following DNA sequence: 5'ACGTAC 3'
To become a virus, you only need 2 parts. One is Genetic Material or Genome (DNA or RNA) to
replicate it and the
or Protein Coat which protects the genome from digestive
enzymes. (Answer in lowercase) *
Answer: true
Explanation:
Why does a siren have a lower pitch as it moves away from you? (hurry need answer quick and fast)
A.Diffraction causes the sound waves to bend.
B.Constructive interference causes the amplitude to decrease.
C.Wavelength increases at a very fast rate.
D.The Doppler effect causes a lower perceived pitch.
Answer:
D) the doppler effect
Explanation:
the sound waves are more spread out as it moves away resulting in a lower pitch
Is ATP used for long term storage?
Answer:
No
Explanation:
ATP is not used for long term storage.
What can be used to measure the rate of photosynthesis
Answer:
the answer it at the bottom
Explanation:
Uptake of CO2 by plants: Since CO2 is needed for photosynthesis, measuring how much of it is taken up by the plants gives us information on how much of photosynthesis is happening.
Release of O2: The amount of O2 produced during photosynthesis can be measured.
What two parts of a nucleotide do not change throughout the structure of DNA?
Answer:
The second portion of the nucleotide is the sugar. Regardless of the nucleotide, the sugar is always the same. The difference is between DNA and RNA.
Explanation:
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Five-carbon sugar (deoxyribose sugar) and phosphate moiety are the two parts of a nucleotide which do not change throughout the structure of DNA.
What are Nucleotides?Nucleotides are the organic molecules which are consisting of a nucleoside molecule and a phosphate moiety. They serve as the monomeric units of the nucleic acid polymers- deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are the essential biomolecules within all the different life-forms on the Earth.
Nucleosides are made up of nitrogenous bases and pentose sugar. There are changes at the nitrogenous bases in the different nucleoside molecules however, there are no changes in the pentose sugar and the phosphate moiety of the molecule.
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Which of the following correctly describes how epithelial tissues gets nourishment?
From blood vessels deep to the basal layer.
Epithelial tissue does not need nourishment, it is dead.
From blood vessels scattered throughout the cells.
From the air surrounding the apical surface.
From the air surrounding the apical surface.
Answer:
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How do scientists find the epicenter of an earthquake?
Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects.
Choose all the answers that apply.
Muscles in the small intestine are _____.
smooth
striated
involuntary
voluntary
cardiac
Pls pick multiple
Answer:
smooth and involuntary
Two layers of smooth muscle form the small intestine. The outermost layer is the thin, longitudinal muscle that contracts, relaxes, shortens, and lengthens the gut allowing food to move in one direction. The innermost layer is a thicker, circular muscle.
Also smooth muscle is not under our control so is called involuntary
DNA Polymerase makes a copying error in a gene and an additional base
gets put into that gene. Which of the following is the most reasonable
result? *
1. The codons on the mRNA transcript contain an extra base which causes the amino
acid chain to not make the desired protein.
2. This causes RNA polymerase to transcribe the gene backwards.
3. The causes RNA polymerase to not recognize the gene and therefore no transcription
takes place.
4. The RNA polymerase recognizes extra bases and won't transcribe them.
Answer:
1. The codons on the mRNA transcript contain an extra base which causes the amino
acid chain to not make the desired protein.
Explanation:
Then error will make it not to produce the required output
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Answer Q1-7 using the food web pictured below.
1. How many food chains make up the food web?
2. Which organism is an herbivore?
3. Which organism is an autotroph?
4. Which organism is a third-order heterotroph? To what trophic level does that organism belong?
5. Which organism is an omnivore?
6. Which organisms belong to more than one food chain?
7. Which organism belongs to more than one trophic level?
1. 6
2. insect
3.plant
4.snake
5. snake
6. plant
7. bird
hope this helps, sorry if i got any wrong
What is a function of the respiratory system?
Answer:
The respiratory system's main purpose is to move fresh air into your body and moving waste gasses out (like carbon dioxide when you breathe out)
How do i know if its entering or leaving or neither just by the precentage?
Answer:
1. Shrink
2. Swell
3. Neither
Explanation:
The percentage of water indicates how pure the water is, i.e. how concentrated the molecules of water are.
The higher the percentage of water, the more water molecules there are in the space.
Water molecules move from a high concentration to a low concentration across a semi permeable membrane, by the process of osmosis.
In beaker 1, the water outside is 89%, and inside the bag is 92%. That means the water inside the bag is at a higher concentration than outside. That means water will leave the bag, moving from a high concentration to a lower concentration outside. The bag will shrink.
In beaker 2, the water outside is 97%, and inside is 92£%. That means the water inside the bag is a lower concentration than outside. That means water will enter the bag, moving from a higher concentration outside to a lower concentration outside. The bag will swell.
In beaker 3, the concentration of water inside and outside is the same. That means they are in an equilibrium (the movement is balanced) so neither will occur
Explain how a global temperature increase could affect plants.
Answer: When temperatures rise, Plants grow taller to cool themselves off.
Explanation:
Their stems grow taller and their leaves become narrower and grow farther apart.
Using f(x) = 3x + 4 find f(3)
Answer:
f(3)=13
Explanation:
f(x)=3x+4
f(3)=(3x3)+4
f(3)=9+4
f(3)=13
In 2019, what was the total income for all agriculture commodities?
Answer: Cash receipts for all commodities are forecast to decrease $12.3 billion (3.3 percent) to $358.3 billion (in nominal terms) in 2020. Total animal/ ...
Explanation: