Answer:
I would say B
Explanation:
well the other options are wrong
Burning a match would be considered a chemical change because it forms new substances.
WHAT IS A CHEMICAL CHANGE:
A chemical change is a change that involves the chemical components of the substance involved leading to the formation of new substances. This is opposed to a physical change, which only involves a transformation of state. Examples of chemical changes include rusting, burning a match etc.Burning a match is an example of chemical change because it involves the formation of new substances such as ash, smoke etc from wood (match stick).Learn more: https://brainly.com/question/23693316?referrer=searchResults
Pls helllllpppppp!!!!!
how was the interior of the atom was experimentally dicovered?
Answer:
Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."
The volume of a brick is 52 cubic inches. Which choice best describes its volume?
Answer:
I think he was right but not explaining
Explanation:
I think it is C cause.... the volume of a material is the amount of matter that matterial can hold. it should the the amount of space the whole material takes up.
so C is the answer.
pls make this the brainliest.
not because it is, but because I asked.
What is the scientific notation of 52,427
Answer:
Explanation:
im not sure
Answer:
5.2427*10^4
If rounding then 5.2*10^4
Explanation:
pha 1000ml dung dịch natri hydroxyd xấp xỉ 0.1N. Xác định độ chuẩn bằng 10ml đ acid hydroclorid 0.1N có K=0.950 hết 11ml dung dịch natri hydroxyd vừa pha
a)tính hệ số hiệu chỉnh K của dung dịch natri hydroxyd
b)tính toán để điều chỉnh nồng độ 990ml dung dịch natri hydroxyd
Answer:
please translate to English so I can help
Explanation:
the reason is bc I cant read this so jus comment in English and I'll reply the answer
please please helpppp
Answer: I think its hydrogen, good luck
Explanation:
Answer:
Last diagram
Explanation:
Here, only individual atoms of argon are there in this gas
how can fossil records be useful to determine the relative ages of rock layers and other fossils?
Answer:
If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time. Thus, the principle of faunal succession makes it possible to determine the relative age of unknown fossils and correlate fossil sites across large discontinuous areas.
Which one is NOT the name of a measurement system? (1 Point) International System of Units Metric System Spanish System British System
Spanish System is not the name of a measurement system.
WHAT IS A MEASUREMENT SYSTEM:
System of measurement refers to a collection of units of measurement and their corresponding rules. These systems are considered to be standard for measuring units. The system of measurements recognized are as follows:The international system of units (S.I units)The metric systemThe British imperial systemTherefore, the SPANISH system is not one of the measurement systems in use.
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2. Choose the best answers
1. A spon used to open the lid of a can is...
(1) first class lever
(ii) second class lever
(ii) thin class lever
(i) none of them.
2. Which simple machine is used to right the screw with screw driver?
(1) Lever (ii) Wheel and Axle (ii) inclined plane (iv) Wedge
3.Which category of the simple machine is autotly Kito
(i) Lever (ii) Wheel and Axle (iii) Pulley (iv Wedged.
4. Which type of the simple machine is the axe!
(1) Lever (2) Screw (3) Wedge (4) Inclined plane
5. Which type of the simple machine is winding road in hilly
(i) Lever (ii) Wedge (iii) Serew (iv) Inclined plane
Answer:
4 ans is 3,5ans is iv i know only this much
is energy absorbed or released to separate the atoms in water molecules
Answer:
First of all, Energy is released when water molecules bond.
Explanation:
When a bond is formed its stability increases from their respective atoms. So energy is released but when we are breaking a bond we are changing a compound to a lower energy state to higher energy state it's stability decreases and requires a bit of extra energy higher stability of bond higher energy required to break it…
Which of these could be a measurement of an object’s mass?
a. 24 newtons
b. 24 grams per milliliter
c. 24 meters
d. 24 grams
Answer:
Mass is a measure of the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg), but smaller masses may be measured in grams (g). To measure mass, you would use a balance.
does nail polish remover sink or float
nail polish remover float
Answer:
it will float on water
explanation:
Geekette hypothesized that since it floated on the water, like ice does, it must be less dense. ... According to Ken Johnsen, who lists his expertise in chemistry, the components of nail polish indeed make it less dense than water
what is a big plants
In the world
who can say
I want a answer
Answer:
Jupiter
Explanation:
Fifth in line from the sun, Jupiter is, by far, the largest planet in the solar system.
What is 2.4 in scientific notation ?
Answer:
2.4 × 10-1
Explanation:
Describe what happens to the arrangement and movement of particles when a substance boils.
Answer:
When boiling a substance, the particles obtain more kinetic and potential energy from the heat being delivered. The kinetic energy means that the particles starts moving more intensely, and the potential energy means that the particles start to move away further from each other, which means the substance expands in volume.
Explanation:
When a liquid is heated, the particles gain energy and begin to move faster and faster, expanding the liquid. As the liquid warms, the most energetic particles at the surface escape as vapor from the surface.
What are particles?A particle is a small localized object to which several physical or chemical properties, such as volume, density, or mass, can be assigned in the physical sciences.
Atoms are small units of matter that contain a number of particles known as subatomic particles. The term particle, on the other hand, refers to any small object.
As a result, the primary distinction between atoms and particles is that atoms are small units composed of multiple particles, whereas particles are minute portions of matter.
When a fluid is subjected to heat, the particles acquire energy and start moving extremely fast, causing the liquid to expand.
The much more energetic particles at the exterior getaway as vapor phase from the surface as the liquid warms.
Thus, the arrangement and movement of the particles gets disturbed when a substance is boiled, and it gets escaped as vapor.
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How would you find the mass of an object from its density and volume ?
Answer:
Mass= volume x density
Explanation:
Multiply the density by the volume.
negative
in your own words, why dose a car have
accelerction when it stops at a stop light?
Answer:
since it has lower mass. the force acting on it results in larger acceleration.
Need help please
Which of the following physical changes shows a change in a substance’s state of matter?
A. A piece of paper being torn in half
B. Clay being molded into a bowl
C. An ice cube being crushed
D. Liquid water becoming steam
Answer:
c
Explanation:
because when you crush an ice it would break into peace's and the ice would not be a solid
What is the solution to pollution?
Can someone do this for me? Pleaseeeee I’m very busy.
The directions tell you what to do.
Answer:
in number 7 its Gas because the molecules are afloat and/or moving rapidly.
Explanation:
which one has minimum number of atom?
(a) 8g O2 gas
( b) 1g H gas
(c)7 g nitrogen gas
(d) 1.5 g helium gas
Answer: 1 g H2 gas
Explanation:
8g O2 = 0.25 moles
1g H2 = 0.50 moles [I assume you mean H2, not H. If it is H, then moles = 1.0 moles H
7g N2 = 0.25 moles
1.5 g He = 0.43 moles
===============
The moles above are based on molecules. All but He are multiplied by 2 to give the number of atoms. If H2 is correct, it has the greatest number of atoms. (Not if it is just H).
True or false?
1. Cells carry on the processes that keep organism live?
True or false?
2. The digestive system is in the levels of organization under organ?
Which is true about dissolving a polar substance in water?
The solvent particles are all nonpolar molecules.
The solute particles are carried into the solution.
The solute particles have no attraction for the solvent molecules.
The solute particles are very different from the solvent molecules.
Answer: The best answer is "The solute particles are carried into solution."
Explanation: I saw "best" because I don't know how to interpret "carried into solution." Does this refer to some micro-critter putting them into wheelbarrows? But it is better than the other options. Water (the solvent particles) are all polar. The solute (stuff being dissolved) DOES have an attraction for the solvebt (water), since water is also polar. The solute particles are very different: possible, but irrwelevant. As long as they are polar, I don't care what they look like.
None of the statements are true about dissolving a polar substance in water.
What happens when a polar substance is dissolved in water?When a polar substance is dissolved in water, the solute particles get surrounded by the water molecules to form hydration shells because of strong electrostatic interactions between the polar solute and polar water molecules. This process is called solvation or hydration.
The dissolution of a polar substance in water breaks the intermolecular forces within the solute particles that leads to the development of new forces between the solute and solvent particles.
However, the solute particles have attraction for the solvent molecules. Water being a polar solvent dissolves only polar compounds, but not dissolve nonpolar compounds because of lack of strong interactions between nonpolar molecules and water to overcome the cohesive forces among nonpolar molecules.
Therefore, none of the statements are true about dissolving a polar substance in water.
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Que significa HI en educación ambiental
Answer:
Um... Hello in environmental education. i think that what u said :)
Explanation:
Which option is a valid hypothesis in the correct format?
1. if a cotton plant receives 100mL of water everyday, it will display steady growth.
2. If a cotton plant displays steady growth, it will receive 100 mL of water every day.
3. If cotton plants need a consistent amount of water to grow steadily, then a cotton plant that receives 100 mL water every day will display steady growth.
4. If cotton plants need a consistent amount of water to grow steadily , then a cotton plant that displays steady growth will receive 100 mL of water every day.
Answer:
4. If cotton plants need a consistent amount of water to grow steadily, then a cotton plant that displays steady growth will receieve 100 mL of water every day.
Explanation:
Hypotheses are written in the format of "If... then...". It should include information on both variables to arrive at a conclusion point.
What do you do to test a hypothesis
Guess
Create a spreadsheet with data
Publish a scientific paper
Design an experiment
Ethanol had a boiling point of 78.4°C. Propane has a boiling point of -42°C. Suggest why.
Answer:
Chemical compounds all have different melting points.
Explanation:
chemical compounds all have different freezing and boiling points. Different chemical compounds means they will have different chemical structures.
What type of volume is solid
Answer:
Fixed Volume
Explanation:
Solids have a fixed shape and occupy a fixed volume.Because the particles in liquids are very close together barely further apart than in solids, liquids do not easily compress, so their volume is fixed. Gases can also flow, so occupy the shape of their whole container. They do not have a fixed shape.
define each of the terms below IN YOUR OWN WORDS
Environmental Value System:
Entropy:
Equilibrium:
Feedback:
Feedback, negative:
Feedback, positive:
Gaia:
Model:
Answer:
1- Environmental Value System or EVS is a worldview that molds the way both individuals and the societies they form perceive and therefore evaluate environmental concerns.
2-Entropy/ the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.
3-Equilibrium/a state of balance between opposing forces or actions that is either static
4-Feedback/a return of information about a result or the returned portion of a process.
5-Feedback,negative/ is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output.
6-Feedback,positive/ is the amplification of a body's response to a stimulus.
7-Gaia/ all organisms and their inorganic surroundings on Earth are closely integrated to form a single and self-regulating complex system
8-Model/a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes.
what's is half life
_______ is an example for isotone. a)argon and carbon b) uranium and carbon c) carbon and boron d)sulphur and boron.
Isotones are nuclides that have the same neutron number but a different proton number. Therefore the answer is C. boron and carbon.
Answer:
c) carbon and boron
Explanation:
They have the same number of neutrons but different number of protons.
They both contain 7 neutrons
