when salt dissolves into water does it change its state
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Answer:
no it doesn't change back
fine here When you dissolve salt in water, the sodium chloride dissociates in Na + ions and Cl - ions, which may be written as a chemical equation : NaCl (s) → Na + (aq) + Cl - (aq) Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion).
Related Questions
help pls i will give brainlest
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Answer: its 5ft tall and 12 inches
Explanation:
please helpp, its just true or false
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Answer:true
Explanation:
Which items are biomass energy sources? Select all correct answers.
the sun
wood chips
manure
paper
Answers
Answer:
wood chips, paper, and manure are biomass energy sources.
Explanation:
Biomass energy is energy generated or produced by living or once-living organisms.
Wood chips, paper, and manure are biomass energy sources. The primary form of energy from renewable sources that can be utilised to replace fossil fuels on a long-term basis is biomass.
Energy created or generated by living or formerly living creatures is known as biomass energy. Plants like the aforementioned maize and soy are the most prevalent types of biomass that are utilised for energy. These creatures' energy may be used to generate electricity or be burnt to provide heat. Direct combustion is the primary method of producing most of the power from biomass. In a boiler, biomass is burnt to create high-pressure steam. These turbine blades revolve as a result of the steam flowing over them. Wood chips, paper, and manure are biomass energy sources.
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IMPORTANT
climate change could cause floods and starvationin diffrent parts of the world
explain how the burning of fossil fuels causes climate change
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Answer:
Image result for explain how the burning of fossil fuels causes climate change
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming.
Explanation:
Answer:
Correct answer: B). Global climate is changing due to burning of fossil fuels and deforestation.
Forest holds a large amount of carbon, plants are known to absorb carbon dioxide from the atmosphere as they grow, that carbon dioxide is stored in plants in the form of carbon in plant's roots, leaves and in the soil. When trees are cut down, that stored carbon is released in the environment in the form of carbon dioxide, which accounts for approximately 18% of global greenhouse gas emission.
The burning of fossil fuel like coal, petroleum, oil, gas for the energy purpose is one of the major contributors for the rising level of carbon dioxide in the atmosphere, which leads to global warming and affect the climate.
Hence, the correct answer would be option B.
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
So i have a question for my assignment...
"The scientific theory of plate tectonics states that the Earth's crust is composed of many plates, or stabs of rock. Interaction of these plates have created different landforms, or geologic, features. Which of the following statements provides evidence for this theory?"
A: The city of Pompeii is perfectly preserved under volcanic ash following the eruption of Mount Vesuvius.
B: A large earthquake off the coast of Japan induces a wave that is over twenty feet high.
C: Fossilized marine creatures can be found at the top of the Himalayan Mountains.
D: An iceberg buckles the hull of the titanic and allows waster to enter between the steel plates.
i need the answer quickly, please and thank you! :)
Answers
Answer:
B
Explanation:
A tsunami doesn't just happen, it happens by an earthquake or the movement of the plates.
PLEASE HELP! ill give brainliest if it ACTUALLY helps-
which is a physical change?
a.) rusting iron
b.) burning paper
c.) cracking egg shell
d.) reacting baking soda and vinegar
Answers
Answer:
C) cracking an egg shell
Explanation:
because it is ireverable
YW have a good day :)
Answer: C.
Explanation:
because you are simply breaking it you are not making a chemical reaction.
Award is 100 Points for the First Correct Answer!
Question:
which has more calories : table sugar or aspartame ?
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Table sugar, also known as sucrose, contains 4 calories per gram, whereas aspartame contains only 0.2 calories per gram. This makes table sugar much higher in calories than aspartame.
Answer:
Table sugar has more calories than aspartame. A teaspoon of table sugar (4 grams) contains approximately 16 calories, while a teaspoon of aspartame (0.5 grams) contains only 0.4 calories. This is because table sugar is a carbohydrate and contains four calories per gram, while aspartame is a non-nutritive sweetener and is virtually calorie-free.
?What statement best describes the arrangement of the atoms in an ethylene molecule?
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Methane (CH4) combines with oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O). Describe the number and type of atoms for a molecule of each substance.
HELP (thanks if you give a good/correct answer)
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Answer:
A molecule of methane (CH4) contains 1 carbon atom and 4 hydrogen atoms. A molecule of oxygen gas (O2) contains 2 oxygen atoms. A molecule of carbon dioxide (CO2) contains 1 carbon atom and 2 oxygen atoms. A molecule of water (H2O) contains 2 hydrogen atoms and 1 oxygen atom.
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Which of these is a characteristic of index fossils?
Found in the topmost rock layer
Found in many layers of the same rock
Have already established relative age
Are limited to a particular geographic location
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Answer: It is the third one.
Explanation:
An index fossil is something that a human can estimate the age of the fossil by looking at it.
Index fossils are distinct in nature and recognisable. It is also widely present across the world. It is abundant and found everywhere.
what does inquiry process mean in science. answer now plz!!!!! firs one gets a brainly
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How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
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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
7. Disulfur dichloride can be made by reacting chlorine gas with molten sulfur. What is the yield of S2Cl2 expected in a laboratory experiment from the reaction of 10.0 g S8 and 6.00 g Cl2? What if the reaction consistently gives an 85.0 % yield?
Answers
Answer:
11.4g of S₂Cl₂ is the expected yield
9.69g of S₂Cl₂ are produced with a 85% yield
Explanation:
The reaction of sulfur S₈ with Cl₂ to produce S₂Cl₂ is:
S₈ + 4Cl₂ → 4S₂Cl₂
Where 1 mole of sulfur reacts with four moles of chlorine to produce four moles of disulfur dichloride.
To find the limiting reactant you need to convert mass of each reactant to moles using its molar mass, thus:
S₈ (Molar mass: 256.52g/mol): 10.0g ₓ (1mol / 256.52g) = 0.0390 moles S₈
Cl₂ (Molar mass: 70.9g/mol): 6.00g ₓ (1mol / 70.9g) = 0.0846 moles Cl₂
For a complete reaction of 0.0390 moles of sulfur, there are necessaries:
0.0390 mol S₈ ₓ (4 mol Cl₂ / 1 mol S₈) = 0.156 moles Cl₂. As you have just 0.0846 moles of chlorine, Cl₂ is the limiting reactant.
As 4 moles of Cl₂ produce 4 moles of S₂Cl₂. 0.0846 moles of Cl₂ produce, in theory, 0.0846 moles of S₂Cl₂ (Molar mass: 135.04g/mol). In mass:
0.0846 moles S₂Cl₂ ₓ (135.04g/mol) =
11.4g of S₂Cl₂ is the expected yieldIf you produce just the 85.0% of yield, mass of S₂Cl₂ is:
11.4g ₓ 85% =
9.69g of S₂Cl₂Less than 3 percent of water on Earth is freshwater found in rivers, lakes, and streams with most of the freshwater frozen in ice caps and glaciers. Freshwater is the only type of water that people and other land animals are able to drink to survive.
True
False
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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.
what is cellular respiration?
A. The breakdown of glucose to release ATP
B. The breakdown of glucose to release oxygen
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Which element is represented by this model?
Be; Beryllium
N; Nitrogen
C; Carbon
F: Fluorine
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Answer: C; Carbon
Explanation: The model is showing it has 6 electrons, 6 protons, and 6 neutrons. Therefore the element, carbon.
Answer:
Carbon
Ok it needs more characters
Think about "The Law of Conservation of Mass" (In a chemical change, the total mass of the new substances is always the same as the total mass of the original substances.) Why might it be difficult to demonstrate this law in chemical changes where one or more of the products is a gas?
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Answer:
The Law of Conservation of Mass states matter cannot be created/destroyed in a chemical reaction
It is hard to prove the law because the gas molecules move out the area quickly, at a higher speed than liquid or solid particles.
If their appears to be a loss in mass, it is because of the above, and that is why it may be difficult to demonstrate this 'law'.
Millions of years ago in many different regions of the world, large-scale burials of organic matter were followed by the formation of underground traps. Which of the following provides evidence of these past geologic processes?
A.
Areas where these geologic processes occurred now have major petroleum reserves.
B.
Areas where these geologic processes occurred now have very fertile soil.
C.
Areas where these geologic processes occurred now have major groundwater reserves.
D.
Areas where these geologic processes occurred now have very few natural resources.
Answers
The evidence of these past geologic processes is provided by areas where these geologic processes occurred now have major petroleum reserves and the correct option is option A.
What are fossil fuels?
Fossil fuels are compound mixtures made of fossilized plant and animal remnants from millions of years ago. The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure.
Fossil fuels are a non-renewable source of energy. Most of the energy used by us is obtained by the burning of fossil fuels. These fossil fuels are used up at a faster rate. They cannot be regrown at a scale compared to their consumption.
Petroleum, natural gas, coal, etc. are some examples of fossil fuels.
Therefore, the evidence of these past geologic processes is provided by areas where these geologic processes occurred now have major petroleum reserves and the correct option is option A.
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If you get this right, I'll teach you how to out pizza the hut :)
Answers
Answer:
Lightning rods (and the accompanying protection system) are designed to protect a house or building from a direct lightning strike and, in particular, a lightning-initiated fire, Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit, and An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.
Explanation:
Im smart
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!!
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Answer:
Choice 3
Explanation:
I think it would be the easiest
Tell me step by step how to do 3/5 divided by 5.
Answers
Answer:
3/25
Explanation:
3/5 divided by 5.
Flip the reciprocal of 5.
3/5*1/5.
3/25.
Hope this helps plz mark brainliest :D
Answer:3/25
Explanation:divide
Please help me por favor :'(
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If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?
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Please draw a diagram of how a magnetic field works around a magnet. Please label.
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Mark me Brainly
An example of pressure causing metamorphism is?
A. lava cooling from a volcano
B. when two tectonic plates collide and add folds into the rock
C. magma touches parts of the lithosphere
D. everyone in the world jumping up and down at the same time
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Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex
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Answer:
The answer is C.
Explanation:
Please give brainliest
Answer:
D
Explanation:
complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.
What is a small ball that orbits around a planet.
There's no science section sorry
Answers
Answer:
Moon I am guessing. Another option is comet, but they normally don't orbit a planet.
What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?
It melts.
It expands.
It gets cooler.
It gains energy.
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Answer:
It gets cooler.Explanation:
Hopes this helps. Mark as brainlest plz!Answer:
it gets cooler
Explanation:
i took the test and got it correct