What is the difference between a physical change and a chemical change in water molecules?
Answers
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Explanation:
Related Questions
Which process cannot happen?
a. Igneous rock → heat and or pressure → metamorphic rock
b. Igneous rock → weathering and erosion → burial → deposition →
cementation → sedimentary rock
c. Metamorphic rock → melting →solidification →igneous rock
d. Sedimentary rock →melting →solidification → metamorphic rock
Answers
Hi!
Option d. Sedimentary rock →melting →solidification → metamorphic rock is a process that cannot happen.
Reason :-Please check the attached image for the diagram of rock cycle. In it, the sedimentary rocks melt to form magma and solidifies into igneous rocks, not metamorphic rocks
Answer:
it is option d. sedimentary rock - melting - solidification - meta metamorphic rock that cannot happen...
Explanation
Which of the following statements correctly explains why physical properties of a substance can be used to separate mixtures?
1. When substances are mixed together, they retain their physical properties.
2. When substances are mixed together, you can see each individual component
3. When substances are mixed together, the mixture assumes the physical properties of each individual substance.
4. Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.
Answers
Answer:
4) Mixtures contain different substances with different properties and chemists can separate one item from the mixture by forcing it to undergo a chemical change.
Explanation:
Mixtures contain different substances with different physical properties, such as boiling point, melting point, solubility, density, and so on. These properties can be used to separate the individual substances in the mixture through various techniques. For example, distillation is a separation technique that relies on differences in boiling points of the substances in a mixture. When a mixture is heated, the substance with the lower boiling point will vaporize first, and it can be collected and cooled to form a pure substance. Similarly, other techniques such as chromatography, filtration, and crystallization also rely on differences in physical properties to separate mixtures.
On the other hand, chemical changes involve the rearrangement of atoms within a substance, resulting in the formation of a new substance with different properties than the original. While chemical changes can be used to synthesize new substances, they are not typically used to separate mixtures.
Tectonic activity causes potential energy to build up in the crust. An earthquake occurs when this potential energy is released within the crust. Which statement BEST describes what happens when the energy is released?
Select one:
a. It generates seismic waves that spread out in all directions around Earth.
b. It generates heat waves that affect climate changes around Earth.
c. It generates changes in the magnetic field of Earth.
d. It generates changes in the orbiting speed of Earth.
Answers
Answer:
c. It generates changes in the magnetic field of Earth.
Explanation:
please mark this answer as brainlest
Answer:
C
Explanation:
Will give 100 points!
An earthquake has a high magnitude but a low intensity. Which statement best explains this?
A. Magnitude measures the energy released by the earthquake, while intensity measures the amount of damage.
B. Magnitude measures the duration of the earthquake, while intensity measures the amount of damage.
C. Magnitude measures the duration of the earthquake, while intensity measures the energy released by the earthquake.
D. Magnitude measures the energy released by the earthquake, while intensity measures its duration.
The National Seismic Hazard Map classified one location as having the “highest hazard” and another location as having the “lowest hazard.” Based on this classification, which conclusion can you draw between the "highest hazard" and "lowest hazard" locations?
A. "Highest hazard" locations are better prepared for an earthquake than the "lowest hazard" locations.
B. There will never be an earthquake in the "lowest hazard" location in the future.
C. There will definitely be an earthquake in the "highest hazard" location.
D. There is more likely to be an earthquake in a "highest hazard" location than in a "lowest hazard" location.
How are P waves different from S waves?
A. P waves move under Earth’s surface, and S waves move along Earth’s surface.
B. P waves cause damage, and S waves do not cause damage.
C. P waves travel slowly, and S waves travel quickly.
D. P waves push and pull in the same direction as the wave, and S waves move up and down.
What does a seismograph record?
A. the distance from the epicenter of an earthquake
B. the vibrations produced by an earthquake
C. the amount of damage that results from an earthquake
D. the total amount of energy released by an earthquake
Answers
1. Magnitude measures the energy released by the earthquake, while intensity measures its duration. The correct option is A.
2. The conclusion you can draw between the two conditions is that there is more likely to be an earthquake in a "highest hazard" location than in a "lowest hazard" location and is denoted as option A.
3. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.
4. Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network.
(1.) If at 100.0 mL solution contains 0.850 moles of a solute, what is the molarity ?
(2.) If the molarity of a solution is 12 M and the volume of the solution is 1.0 L, how many moles of solute does the solution contain ?
Answers
Answer:
See below
Explanation:
1) Moles / volume
.85 mole / .1 liter = 8.5 M
2) 12 moles are contained in one liter
.85 mole / .1 liter = 8.5 M
2) 12 moles are contained in one liter
Which metal can replace another metal in a reaction?
O A. A metal higher on the activity series list will replace one that is
lower.
B. A metal lower on the activity series list will replace one that is
higher
O c. Ametal on the activity series list will replace one that is not on the
list.
D. Any metal on the list can replace any other metal also on the list.
Answers
Answer:
O A. A metal higher on the activity series list will replace one that is
lower.
Answer:
A metal higher on the activity series list will replace one that is
lower.
Explanation:
can someone help with this please right answers only and dont do #2
Answers
Answer: 1. Use goggles, lab coat, and ask instructor about any questions
Explanation:
True or False: Concrete has only positive qualities, and there are no disadvantages to using it.
PLEASE HELP
Answers
At which stage is glucose broken into smaller molecules? before cellular respiration begins during the first stage of cellular respiration during the second stage of cellular respiration at the end of cellular respiration
Answers
Answer:
b
Explanation:
Answer:
its b
Explanation:
What is common among elements in the same group?
Answers
Answer:elements are arranged in increasing atomic number from left to right
Explanation:
Answer:elements are arranged in increasing
atomic number from left to right
What type of person studies and collects data on the weather?
Answers
The scientific method is a process for experimentation that is used to explore observations and answer questions. What is the first step in completing the scientific method? project experimentation B: hypothesis C: problem D: observation
Answers
Answer:
The steps of the scientific method go something like this: Make an observation or observations. Ask questions about the observations and gather information. Form a hypothesis, a tentative description of what's been observed, and make predictions based on that hypothesisExplanation:
sorta explained up there ^^
7: How many times can a volcano erupt?
Answers
Answer:
Some small volcanoes only erupt once in their lives,
while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule
Answer:
small volcano's only 1 time while big volcano's mutiple times
Explanation:
Do you think a moving skateboard has energy? Why or why not?
PLEASEEEEEE HURRY
Answers
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:
pls i need answers to the 1st, 2nd, and 3rd question
Answers
I believe number one has 2 valance electrons
number 2 has 1 valance electron
and number 3 has 8 valance electrons
valance electrons are the electrons on the outermost ring
URGENT HELP NEEDED! PLEASE ANSWER WITH EXPLANATION*
Much appreciated
1) An 85.0 g sample of copper is initially at 22.2 ∘C What is the final temperature if the sample absorbs 2.35 kJ of heat?
The specific heat of Cu is 0.385 J/(g^ Degree C)
-----------------------------------------------------------------------------------------------------------------------------
2) A 75.0 g sample of aluminum is heated to 65.3 ∘C then allowed to cool. What is the final temperature if the sample releases 2.07 kJ of heat?
The specific heat of Al is 0.903 J/(g degree C)
Answers
Answer:
1) 94.0° C, 2) 34.7°C
Explanation:
1)
Q=mcΔt° =mc(t2 - t1)
2350 J = 85.0 g* 0.385 J/(g*°C) *(t2 - 22.2°C)
t2 - 22.2°C = 71.81°C
t2 = 94.0° C
2)
Q=mcΔt° =mc(t2 - t1)
- 2070 J = 75.0 g * 0.903 J/(g*°C) *(t2 -65.3°C)
t2 - 65.3°C = - 30.56°C
t2 = 34.7°C
Explain how ocean currents affect climate
Answers
As cold water currents travel toward the equator, they help moderate the warm temperatures of adjacent land areas
Long-distance transportation of warmed or cooled water is possible with horizontal currents traveling northward or southward.
What is climate?Climate is a region's averaged long-term weather pattern over a period of time, usually 30 years. More precisely, it is the average and variation of weather factors over a period of time that can range from a few months to many millions of years. Temperature, humidity, air pressure, wind, the precipitation are a few of the meteorological factors that are frequently measured.
Long-distance transportation of warmed or cooled water is possible with horizontal currents traveling northward or southward. The evacuated warm water increases the air's temperature, whereas the cold water is cooled the air, as well as the land surface in which the blows.
Therefore, long-distance transportation of warmed or cooled water is possible with horizontal currents traveling northward or southward.
To know more about climate, here:
https://brainly.com/question/8968111
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piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap
Answers
Answer: Food
Explanation:
The rat smells the food or sees the food it goes towards the food to eat it.
Please draw a diagram of how a magnetic field works around a magnet. Please label.
Answers
Mark me Brainly
What needed to be present in marine mud to form fossil fuels?
Answers
Carbon and Hydrogen.
Answer:
Mostly decaying organisms are needed to present in marine mud to form fossil fuels.
Explanation: When organisms and plants died and sank to the bottom of swamps and oceans, brown soil-like materials called peat are formed. Over millions of years, the peat became covered with sand, clay and other minerals and the peat is converted into layers of sedimentary rocks. After a long time, different type of fossil fuels are formed.
Which of these phrases would go in the overlap? Select two options.
Answers
To draw a Lewis structure for a
covalent compound, begin by
calculating A, the available
electrons, and N, the needed
electrons.
What is A for silicon
tetrachloride, SiCl4?
Answers
Answer:
A = 32
Explanation:
We are given that A is the number of electrons available and N is the needed electrons. These " available electrons " would act as the valence electrons, provided they are the only available electrons to participate in this chemical bonding.
Take a look at the placement of Silicon in the periodic table. It is positioned so that it has 4 valence electrons. Respectively Chlorine is positioned to have 7 valence electrons. There are 4 Chlorine, so determine the available electrons take a look at the math below;
\(4 + 7 * ( 4 ) =\\4 + 28 =\\32\\\\Solution = 32 electrons\)
The compound silicon chloride contains a total of 32 valence electrons.
A Lewis structure is a representation of a molecule using dots to show the valence electrons on atoms in the molecule.
Usually, we begin by determining the number of available electrons on the valence shell of each molecule and them determining the number of electrons that each atom requires to achieve a complete octet.
Silicon has four valence electrons and chlorine has seven valence electrons. Each chlorine atom shares two electrons with silicon making a total of 32 valence electrons in the molecule.
Learn more: https://brainly.com/question/19953404
What type of star has an absolute brightness of 1 and a surface temperature of around 7,500 °C?
The HR diagram is shown with Absolute Brightness on the y axis from negative four to six and Surface Temperature on the x-axis from 40,000 to 2,500 degrees Celsius. There are several dots plotted between four and six absolute brightness and 10,000 to 2,500 degrees Celsius labeled Supergiants. There are several dots plotted between 1.5 and three absolute brightness and 7,500 to 2,500 degrees Celsius labeled Giants. There are several dots plotted between negative four and negative two absolute brightness and 30,000 to 7,500 degrees Celsius labeled Dwarfs. Down the middle, there are several dots plotted diagonally from ordered pair 40,000 and five down to 2,500 and negative three labeled Main Sequence.
Select one:
a. Supergiant
b. Giant
c. Main sequence
d. Dwarf
Answers
Answer:
Main Sequence Stars or C
Explanation:
our star, the sun, being a main Sequence Star with an absolute brightness of 1 with a temp of about t 7500 °C gave me this answer
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
An empty glass is placed inside a larger jar containing muddy water as shown. A dry plastic sheet is tied around the mouth of the jar, which is then placed out in the sun on a hot summer day. By evening, what is likely to be found in the empty glass?
A) The glass is likely to have pure water.
B) The glass is likely to have muddy water.
C) The glass is likely to remain empty.
D) The glass is likely to have pure mud.
Answers
Answer:
a
Explanation:
PLS HELP I'LL GIVE 50 POINTS+ BRAINLIEST TO THE FIRST PERSON WHO WRITES ME AN ESSAY
Part 3: Writing to the People of Westfield
Dr. Yung wants you to explain what the reddish-brown substance is to the people of Westfield. As you write your argument, remember to:
state your claim about the identity of the reddish-brown substance.
use evidence from both your observations and the atomic-scale models to support your claim.
include the vocabulary words listed below in your argument.
Chapter 1 Question: What is the reddish-brown substance in the water?
Claim 1: The reddish-brown substance is the same as the substance that makes up the pipes.
Claim 2: The reddish-brown substance is the same substance as the fertilizer.
Claim 3: The reddish-brown substance is not the same as either the fertilizer or the substance that makes up the pipes.
Word bank: atom, model, property, substance
Answers
Answer:
Dear People of Westfield,
As you may be aware, there has been a lot of concern about the reddish-brown substance found in the water supply. After conducting extensive research and analysis, I am here to share my findings with you.
Based on my observations and the atomic-scale models, I can confidently state that the reddish-brown substance is not the same as either the fertilizer or the substance that makes up the pipes. In fact, the reddish-brown substance has its own unique set of properties that distinguish it from these other substances.
One of the key pieces of evidence supporting this claim is the atomic-scale model of the reddish-brown substance. This model shows that the substance is made up of its own distinct atoms arranged in a specific way. These atoms have unique properties, such as their size and charge, that differentiate them from the atoms that make up the fertilizer and the pipes.
Furthermore, my observations of the reddish-brown substance also support this claim. I have noticed that the substance behaves differently than both the fertilizer and the pipe material. For example, the substance dissolves at a different rate and reacts differently to various chemicals.
In conclusion, it is clear that the reddish-brown substance in the water supply is its own unique substance, with its own distinct properties and atomic makeup. It is not the same as either the fertilizer or the substance that makes up the pipes. I hope that this explanation provides some clarity and reassurance to the people of Westfield.
Explanation:
give me brainliest
I am writing to address the recent concerns about the reddish-brown substance found in your water. After careful observation and analysis, I have come to the conclusion that the reddish-brown substance is not the same as either the fertilizer or the substance that makes up the pipes.
My claim is based on the evidence from both my observations and the atomic-scale models. The atomic-scale models show that every substance is made up of atoms that have unique properties. These properties determine the characteristics of the substance. After analyzing the reddish-brown substance, I found that its properties are different from both the fertilizer and the substance that makes up the pipes.
Furthermore, the reddish-brown substance has a unique set of properties that are not found in either the fertilizer or the substance that makes up the pipes. These properties include its reddish-brown color, its texture, and its chemical composition. These properties are consistent with a different substance that is not related to either the fertilizer or the substance that makes up the pipes.
In conclusion, I believe that the reddish-brown substance is not the same as either the fertilizer or the substance that makes up the pipes. My claim is based on the evidence from both my observations and the atomic-scale models. The properties of the reddish-brown substance are unique and do not match those of either the fertilizer or the substance that makes up the pipes.
Thank you for your attention to this matter.
Sincerely,
[Your Name]
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
List at least three properties of matter.
Answers
Answer: Mass, Volume, shape
Explanation: that’s the three basic properties of matter
your alien friend from planet xenon is visiting and wants to learn how to breed pea plants you show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white flowers your friend is confused as to why your plants all have purple flowers how would you explain in the simplest way possible what happened
Answers
Answer:
The purple flowers were probably was dominate allel and the white flowers were recessive.
Explanation:
What are all the breeds of dogs and how many breeds of dogs are there?
Answers
Answer:
In the United States alone, the AKC's dog breed list currently includes 190 dog breeds. Worldwide, the FCI lists 360 officially recognized breeds.
Explanation:
There are approximately 400 separate breeds of purebred dogs worldwide. A purebred dog is considered to be one whose genealogy is traceable for three generations within the same breed
There are currently more than 340 different breeds of dogs recognised throughout the world.