Answer:
Explanation:
Causes of Greenhouse Effect
Burning of Fossil Fuels. Fossil fuels are an important part of our lives. Deforestation. Plants and trees take in carbon dioxide and release oxygen.Farming.Industrial Waste and Landfills.Global Warming.Depletion of Ozone Layer.Smog and Air Pollution.Acidification of Water Bodies.
What is the scientific notification of 266
in 1 to 2 sentences explain why a structural formulas are good for depicting polymers
Answer:
they explain the properties and structure of the compound which empirical molecular formulars cannot explain
The structural formulas are good for depicting polymers because polymers are the chemical compounds attached to the long chain with ac other which is impossible to represent other than the structural formula.
What are structural formulas?The structural formulas are the graphic representation or diagrammatical representation of the structure of any chemical formula in organic and inorganic chemistry they are mostly used.
In Polymers, they are long chains of chemicals compound can be shown diagrammatically or graphically to understand the attachment t of the bonds within them which signifies the physical properties too.
Therefore, polymers are the chemical compounds attached to the long chain with ac other which is impossible to represent other than the structural formula which is why structural formulas are good for depicting polymers.
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is a molecule?
А.
a substance made completely of the same type of
atoms that are NOT chemically bonded together
B.
the smallest part of a substance that is still that
substance with atoms chemically bonded together
(1st gets it right wins a burrito)
Answer:
B. the smallest part of a substance that is still that substance with atoms chemically bonded together
Explanation:
Molecules are the small part of a substance with the atoms that are chemically bonded together. Hence, option (B) is the correct answer.
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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How many elements are in “H2”
When a substance is in the process of changing phases states of matter what happens to the temperature
Answer:
Temperature stays constant.
Explanation:
During a phase change, the temperature does not change. Temperature will only change when a phase change is completed.
Why does organic chemistry have a wide variety from compounds primarily based on only two elements? please help
Organic chemistry have a wide variety from compounds of the presence of two elements namely
CarbonHydrogenThe main variety of compounds exists in the combination of carbon and hydrogen forming hydrocarbons which are the basis of life and present in cells making them virtually everywhere around us.
Organic molecules in itself comprises of multiple chains of carbon atoms with different lengths and because of the ability of carbon to bond with many elements, This produces a variety of compounds which no other atom or element can.
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Results when a few drops of acidified aqueous potassium manganate are added to potassium iodide
sorry for points ....
hope I helped
A teacher is instructing students about the states of matter. He wants to compare the
numbers of elements that exist as solids, gases, and liquids at room temperature.
Which kind of illustration should the teacher use to present this information?
The teacher can present this information using a bar chart.
In science, charts are commonly used to present information where comparison is necessary.
Bar charts are especially useful when we intend to show large changes.
In the periodic table, elements exists in various states of matter;
SolidLiquidGasSometimes, as a teacher, you may need to compare the number of elements that exist as solids, gases, and liquids at room temperature.
This comparison is easily brought out using a bar chart since the changes involve large numbers.
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How many cg in 173g???
Which of the models shown below best represents the modern understanding of the structure of the atom?
Model B
Model A
Model A
Model C
Photos by Phood and Furman
Model B
ОО
Model C
Answer:
The answer may be A because that's what I believe
Substances have more kinetic energy in the _______ state than in the _______ state.
Answer:
Substances have more kinetic energy in the gas state than in the Solid state.
Gas have more kinetic energy as it flows from here and there.It flows really fast as it have less space between the molecules
Solids have less Kinetic energy as it is hard and can't flow so easily like gas . It has tightly packed molecules
Which statement accurately describes test tubes and beakers?
A.Beakers and test tubes both have rounded bottoms.
B.Test tubes are better for transferring liquids than beakers.
C.Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.
D.Beakers can be held over a flame; test tubes cannot.
Beakers are flat bottom laboratory glassware that can be used to hold liquid in the laboratory. A test tube is a laboratory glassware that is unmarked and can be used to heat a liquid over a flame.
The correct answer is option C: Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.
Several glassware are very useful in the laboratory especially when dealing with liquids.
Two among these important glassware are beakers and test tubes. A beaker is mostly used to hold liquids while a test tube is used to both hold and heat liquids if need be during a laboratory experiment.
Beakers are graduated by the side while test tubes are unmarked.
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El agua de lluvia tiene un pH de 4,00. Calcule su concentración de ion hidrógeno en mol/litro. Explique por qué el agua es ácida en lugar de neutra.
All work stations and apparatuses must be ____ at the end of the lab experiment or work day.
a. destroyed by fire. b. exchanged for new
c. cleaned
d. disposed of
What process must occur to cause sediment to stick together when forming sedimentary rock?
cooling
cementation
Compaction
weathering
Answer:
Compaction and Cementation
Dissolved minerals in the ground water precipitate (crystallize) from water in the pore spaces forming mineral crusts on the sedimentary grains, gradually cementing the sediments, thus forming a rock
Why is agar medium used in Petri dishes?
A.It makes bacteria appear larger.
B.It sterilizes the petri dish.
C.It helps microorganisms grow.
D.It makes cells glow.
Answer:
C is the correct answer.
Explanation:
Agar provides a solid growth surface for the bacteria, upon which bacteria reproduce until the distinctive lumps of cells.
The agar medium is used in Petri dishes because it helps microorganisms grow. option C is correct.
What is a microorganism?A microorganism is a microscopic body that cannot be seen with the normal human eyes on anything it can be a virus or bacteria or both. Viruses are disease-causing mostly but there are some good bacteria too.
The use of agar medium is the source of food for the microorganism as all the micronutrients and macronutrients with essential amino acids are present into it.
Therefore, option C is the correct agar medium used in Petri dishes because it helps microorganisms grow.
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Please help me!! Really important
Answer:
Lanthanum and Lutetium
I hope this will help you
mearling.
the flow of water
that moves below
the surface
the flow of water
Explanation:
it's actually b)
When adding or subtracting deelmals, how many digits should the answer contain?
Answer:
Depends, but in most cases, 2.
It's best to use as many digits as possible to keep it accurate.
Explanation:
This varies between teachers, as most schools go with 2 decimal places.
This is something that depends in your situation.
You technically want as many decimals as possible to keep it as accurate, but most people stick with 2.
I personally do 3, and commonly do 5 sometimes.
constraints of a crane
Answer:
The crane should have an electromagnet attached to its arm. The electromagnet: should have a soft iron core made from a bundle of short lengths of iron wire, must be strong enough to pick up several steel paperclips, nails or coins. Work on your own. This task will be assessed.
Explanation:
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.
Click on the image that most accurately represents a pure
compound.
Corre
Incor
what is a balanced chemical formula
what is it and how do i do it
If a person weighs 125 lbs, 8 oz., how many mg does s/he weigh?
explanation
Answer:
56925842
Explanation:
its right
fog forma when vapor changes to the what state of matter
George Washington yugg
The beaker and the graduated cylinder are both holding liquids. The beaker has lemonade and the cylinder has grapefruit juice. What statement best compares the two liquids?
a tall narrow cylinder and a short wide beaker with one hundred milliliters of yellow liquid in them
A. The mass of the liquid does not change if the volume of the liquid changes.
B. The volumes of the two liquids are exactly the same.
C. The volume of the liquid in the beaker is greater because it is short and round.
D. The volume of the liquid in the graduated cylinder is greater because it is taller and narrower.
Answer:
B
Explanation:
Same amount of liquid and take up same amount of liquid but they are in different containers
The boiling point of ethanol is 78.40 c. A student conducts an experiment and finds a boiling point at 75.70 c. What was the percent error? (Please show work I have no idea how to do this cause we haven't learned it yet)
Answer:
[tex]\% \: error = | \frac{origina - expirimental}{original} | \times 100 \\ | \frac{78.40 - 75.70}{78.40} | \times 100 \\ = \frac{2.7}{78.4} \times 100 \\ =3.44 \\ thank \: you[/tex]
Aluminum is more reactive than carbon.Use this fact to explain why tin has been used by humans for longer than pure aluminium.
Answer:
aluminium is more reactive than carbon. carbon is used to displace less reactive metals from their compounds. this happens since the carbon reacts with the other substance(s) in the compound, and the less reactive metal does not.
Answer:
Explanation: aluminium is more reactive than carbon. carbon is used to displace less reactive metals from their compounds. this happens since the carbon reacts with the other substance(s) in the compound, and the less reactive metal does not.It is highly reactive, though the metal is protected by a surface layer of inert transparent oxide (Al2O3) that forms rapidly in air, providing excellent corrosion resistance.
Calculate the density of a 20.015 g object that occupies 5.44 cm3 .
Answer:
[tex]density = \frac{mass}{volume} \\ \\ density = \frac{20.015}{5.44} \\ \\ { \boxed{ \boxed{density = 3.679 \: g {cm}^{ - 3} }}}[/tex]
