Complete the following sentence: "During a chemical reaction."
Select one:
O
the number of atoms in the product(s) is less than those of the reactant(s).
O
the mass of the atoms of the product(s) is greater than those of the reactants).
O
a small amount of matter is destroyed during the process
a new substance(s) with the same number of atoms as the initial substance(s) is
tormed
Answers
Answer: a new substance(s) with the same number of atoms as the initial substance(s) is formed
Explanation:
Chemical reaction is a reaction in which there is rearrangement of atoms and thus new substance is formed.
According to the law of conservation of mass, mass can neither be created nor be destroyed in chemical reaction. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Related Questions
DUE SOON PLEASE HELP WILL MAKE FIRST ANSWER BRAINLIEST!!!
You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:
-Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
-Models must be created by you, not something selected from an online or outside source.
-Submit a presentation, picture, video, or screenshot of your model.
-Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.
Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.
1- Conservation of Mass-Explore the law of conservation of mass. Model a physical or chemical change, and then demonstrate how mass is conserved before and after the change.
2- Atomic Theory-Explore the atomic theory of atoms. Create a model that represents the motion and intermolecular attractions of particles in solids, liquids, and gases.
3- Thermal Energy-Explore the effects of thermal energy. Model how adding or removing thermal energy affects motion in particles in a pure substance, such as water, or in a chemical reaction.
!!PLEASE CHOOSE ONE OF THE 3 ABOVE!!
Answers
Answer:
Choice 3
Explanation:
I think it would be the easiest
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
Answers
Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
The toucan uses its long beak to reach fruits and berries growing on trees in the forest. The energy stored in the fruit and berries is passed on to the toucan when it is eaten. What is the source of energy for the fruits and berries growing on the trees in the tropical forest?
A: Soil
B. Sunlight
C. Heat
D. Water
Answers
Answer:
The type of adaptations of the Toucan and Monstera Plant are physical adaptions. Both of these adapted physical characteristics help these organisms to survive. The difference in their physical adaptation is that in the Toucan, the physical characteristic helps the Toucan consume nutrients. Meanwhile, the adaptation of the Monstera Plant helps prevent harmful things such as mold.
Plants use photosynthesis to convert light into cellular energy, which allows them to make “food” out of the water and nutrients from the soil.
The lines in an element's atomic spectrum result from
electron spins going in opposite directions.
energy that is spread out among an atom's electrons.
electrons moving from a lower to a higher energy level.
electrons moving from a higher to a lower energy level.
Answers
The lines in an atomic spectrum indicates the transition of electrons from higher energy level to the lower energy level. Hence, option d is correct.
What is atomic spectroscopy?The investigation of the electromagnetic radiation that atoms absorb and release is known as atomic spectroscopy. Atomic spectroscopy, specifically the electromagnetic spectrum or mass spectrum, is used to determine the elemental compositions of substances since distinct elements have distinctive spectra.
Depending on the type of spectroscopy being utilized or the atomization source, it can be divided. The primary distinction in the latter instance is between optical and mass spectrometry. Although substantially more difficult, mass spectrometry typically provides significantly higher analytical performance.
Electrons can migrate between orbitals, but doing so requires them to either absorb or emit energy equivalent to the difference in energy levels between the quantized orbitals of their respective atoms.
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Fill each box with the chemical formula of the compound.
Answers
NaF, NaBr, Na2O, Na2S, Na3N, Na3P, NaI
KF, KBr, K2O, K2S, K3N, K3P, KI
BeF2, BeBr2, BeO, BeS, Be3N2, Be3P3, BeI2
MgF2, MgBr2, MgO, MgS, Mg3N2, Mg3P2, MgI2
CaF2, CaBr2, CaO, CaS, Ca3N2, Ca3P2, CaI2
Hope this helps! Make sure that the numbers are written small at the bottom of the letter cause it wasnt possible to do that here.
Complete each statement with the word that makes it true. The noble gases are the least of any elements on the periodic table. The form acidic compounds with hydrogen. The halogens are the most reactive among all the
Answers
Awnser 1.reactive
2.halogens
3.nonmetals Explanation:
2 halogens
3 non metals
In your own words, explain the difference between how a ‘dam system’ transforms hydropower into electrical energy compared with how a ‘run-of-the-river system.
Answers
Which of the following statements fully describes what an object may do when it experiences unbalanced forces? Select the two best answers.
A. It may change directions.
B. It will move at a constant speed.
C. It may slow down.
D. It may slow down or speed up.
E. It will stay stationary.
Answers
Answer:b
Explanation:
please help
I've finished all my other questions but I'm really stuck on these two
Answers
Answer: 66.66 / 66.67 / 66 2/3 hydrogen 33.33 / 33 1/3 oxogen
for question e
in grams of course
hydrogen: 33.33/33 1/3 oxogen
HELP! 100 POINTS! A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Answers
The average speed of the blocks are 0.36 m/S.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed
with respect to time. As at time t = 0, the speed is
also zero, and at time t = 2.5 s, the speed will be
Speed =
0.9 = 0.36
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
what is matter and what are some thing that are living and nonliving
Answers
Answer:
Living beings and non-living things both follows the physical and chemical general principles, like the thermodynamic laws, and they are constituted both by atoms and molecules, the basis of the natural organization of all known matter on Earth.
Answer: Matter is anything that has mass or takes up space, something non living is a rock something living is a tree
Explanation:
I NEED HELP ASAP PLZZZZ
Answers
Answer: 2 :)
Explanation:
I took the test
first to answer right gets Brainiest!!!!!!
Answers
Answer:
1) Tetanus is a potentially fatal bacterial infection that affects the nerves
2)Tetanus causes painful muscle contractions, particularly in the jaw and neck. It can interfere with the ability to breathe, eventually causing death.
3) infants and the elderly are most likely but every one can get it.
4) The tetanus vaccine is made by taking the tetanus toxin and inactivating it with a chemical. The inactivated toxin is called a "toxoid." Once injected, the toxoid elicits an immune response against the toxin
5) Tetanus antiserum was developed in 1890, with its protective effects lasting a few weeks. The tetanus toxoid vaccine was developed in 1924, and came into common use for soldiers in World War II.
6)CDC recommends tetanus vaccination for all babies and children, preteens and teens, and adults
7) After the initial tetanus series, booster shots are recommended every 10 years.
8)help your immune system protect against these infections
9)Reported tetanus cases have declined more than 95%, and deaths from tetanus have declined more than 99% in the United States since 1947.
10) although the tetanus vaccine can be a very rare cause of a short-lived allergic reaction called "anaphylaxis," the tetanus vaccine does not cause death so the benefits outweigh.
11)They are most commonly found in animal manure and contaminated soil, but may exist virtually anywhere.
Tetanus is a bacteria
The symptoms are muscle spasms and paralysis and or stiffness in muscles
Everyone can get tetanus
Vaccines work by adding a little of the bacteria so your immune system can get a little of tetanus to know how to defend against it.
The first vaccine was produced in 1924
everyone should receive it
you should get one every 10 years
This is important because tetanus is not rare and can cause life changing effects like paralysis
no there has been no real big changes as far as i know
People who vaccinate have a small risk of contracting tetanus from the shot, and people who don't vaccinate could get really bad if not life threatening cases of tetanus.
Yes Defiantly
im not sure about this one
Hope this helps!
plz answer fast in 3 sentences thx (XOXO) ;) will give brianly
Why is the use of the inquiry process (or scientific method) a practical way to approach science?
1.
2.
3.
Why are scientific theories modified, but seldom discarded?
1.
2.
3.
How has science and technology influenced everyday life?
1.
2.
3.
Answers
Answer:
Explanation:
Why is the use of the inquiry process (or scientific method) a practical way to approach science?
1. The inquiry process is a practical way to approach science because the inquiry process begins by asking questions and moving on from there.
2. In science it is important to investigate phenomena or certain subjects by posing questions that you would like to answer through the scientific method.
3. Therefore, the inquiry method is connected because to inquire on a subject requires raising questions which is an essential step in scientific discovery.
Why are scientific theories modified, but seldom discarded?
1. If a theory cannot explain new evidence or observations then the theory is revised or even thrown
out, but if the theory still explains a wide range of observations and evidence then it is revised
rather than discarded.
2. it will still hold some value as above as you learn more you tweak your hypothesis to fit the ever expanding amount of info and data you collect and assimilate
3. The only way they ever go away is if people stop working on them.
How has science and technology influenced everyday life?
1. computers
2. health care
3. bikes
None of these would exist today without science or technology
Answer:
Explanation:
Why is the use of the inquiry process (or scientific method) a practical way to approach science?1. The inquiry process is a practical way to approach science because the inquiry process begins by asking questions and moving on from there. 2. In science it is important to investigate phenomena or certain subjects by posing questions that you would like to answer through the scientific method.3. Therefore, the inquiry method is connected because to inquire on a subject requires raising questions which is an essential step in scientific discovery.Why are scientific theories modified, but seldom discarded?1. If a theory cannot explain new evidence or observations then the theory is revised or even thrownout, but if the theory still explains a wide range of observations and evidence then it is revisedrather than discarded.2. it will still hold some value as above as you learn more you tweak your hypothesis to fit the ever expanding amount of info and data you collect and assimilate3. The only way they ever go away is if people stop working on them.How has science and technology influenced everyday life?1. computers2. health care3. bikesNone of these would exist today without science or technology
Which statement describes a characteristic of an evergreen coniferous tree?
can grow in the tundra
has cones and needle-like leaves
leaves change color in the fall
loses all leaves in the winter
Answers
Please help me decode this. The question for this image is what is the code, and the code has to be: alphabetical without spaces- all lower case
Answers
Answer:
c
Explanation:
Which is a true statement about the following chemical formula?
2(C6H12O6)
A.The formula is a molecule but not a compound
B.There are 18 molecules in this formula
C.There are 2 molecules in this formula
Answers
Answer:
Your answer is C (I think I'm not absolutely sure)
Explanation:
There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. The correct option is option C.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds.
C₆H₁₂O₆ is a molecular formula for glucose. C₆H₁₂O₆ represents one molecule of glucose. 2(C₆H₁₂O₆) represents two molecule of glucose.
Therefore, the correct option is option C.
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Science homework
Pls help me!!!!!!!!!!!!!!!
Answers
Answer:
first one
Explanation:
Particle of solids are very close as the particle can not move they have exact volume,shape
Answer:
First one
Explanation:
since the particles of a solid are packed together.
what is betovens fav. fruit
(answer this on your own no cheating)
Answers
Answer:
Banana ig
Explanation:
It takes a car 1.5 hours to go 90 miles.
What is the average speed of the car in miles per hour (mph).
Answers
Answer:
60 mph
Explanation:
if you do 90÷1.5 you get 60 so thats the average speed
so what you have to do is multiply but one more thing to help you remember is ask for help
2 questions
Popeyes or KFC
Mcdonalds, Wendys, Burger King, Shake Shack, or Chick Fil A
Answers
Answer:
Chick-fli-a
Explanation:
Answer:
Chick-Fil-A
Explanation:
Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)
Answers
Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome
Explanation:
rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.
Match the element with its description.
Answer Choices:
1. Highly reactive gas
2. Malleable, soft, and shiny
3. Nonreactive gas
4. Has properties of both metals and nonmetals
Answers
Sodium is 2
Silicon is 4
Bromine is 1
is copper a renewable resource? explain your reasoning
Answers
Which element has 5 valence electrons on ring 4? ____________ Is it a metal, nonmetal or metalloid?_____________________
What element has 8 valence electrons in the 4th energy level? _____________ Is it a metal, nonmetal, or metalloid?________________
Answers
Answer:
-Nitrogen has 5 valence electrons on the 4th shell
-nitrogen is a non metal
-
Most cells have a(n) in the center of the nucleus which stores materials to make ribosomes.
Answers
Answer:
nucles membrane
Explanation:
brick
Using the data on the map, compare the chance of precipitation in Colorado to the
chance of precipitation in New York State. Include both states in your answer and
support your answer with scientific reasoning.
Answers
how can I put a picture or a photo in my questions?
Answers
Answer:
click the lil button that looks like a paperclip
Explanation:
Answer:
There is a paperclip-looking symbol when you are typing. Just download it to your computer or phone and attach it
Explanation:
How many atoms of Br are there?How many atoms of Br are there?
Answers
Answer:
8
Explanation:
There are 8 atoms of Br because there are two molecules of 4 atoms of Br. 4 x 2 = 8.
Answer: 1 mol Br contains 6.022×1023Br atoms;its mass is 79.90 g.
Explanation:
: I mole or bromine refers to 6×10^23 molecules of bromine. But 1 molecule of bromine has 2 atoms. Hence the atom count will be exactly twice.
The process by which individuals better suited for their environment are more likely to survive and reproduce is known as... * *
A: overproduction
B:competition
C: natural selection
D: variation
Answers
Answer:
I belive it is c
Explanation:
Answer:
C- Natural selection
Explanation: