Answers
Answer:Pores,collar,spicules
Related Questions
how many moles of water are produced from the reaction of 50.0g of methane?
Answers
moles = mass /molar mass
mass of CH4 = 50grams
molar mass of CH4 = 16 g/mol
moles = 50/16= 3.125 mol
The molar ratio of CH4 to H2O is 1:2.
This means that 1 mole of CH4 produces 2moles of H2O.
So 3.135 mol will produce 3.125*2 = 6.25moles of H2O.
Convert the 6.25 moles of H2O to mass by multiplying the moles by the molar mass of H2O
6.25*18=112.5 grams of H2O was produced
6.25 moles of H₂O are produced from the reaction of 50.0g of methane.
Number of moles:It is defined as given mass over molar mass.
Number of moles = Given mass / Molar mass
Given:
Mass of CH₄ = 50grams
Molar mass of CH₄ = 16 g/mol
Number of moles = 50 / 16
Number of moles = 3.125 moles
The molar ratio of CH₄ to H₂O is 1:2.
This means that 1 mole of CH₄ produces 2 moles of H₂O.
So, 3.135 moles will produce 3.125*2 = 6.25 moles of H₂O.
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What do you think caused the original properties of the substances to change in order to form “Elephant Toothpaste"?
Answers
Not every chemical reaction occurs in the same way. There are different types of chemical reactions, including synthesis reactions, decomposition reactions, and displacement reactions. In this experiment, a decomposition reaction takes place. During a decomposition reaction, a compound breaks apart into two or more products. Most decomposition reactions need an outside source of energy in order to take place.
Hydrogen peroxide is not a very stable compound, so it slowly decomposes into water and oxygen gas under normal conditions. In this reaction, yeast is used as a catalyst. A catalyst is a substance that helps to change the rate of a reaction. During the reaction, the catalyst is not consumed. As a result, the yeast makes the reaction occur much faster; it causes the hydrogen peroxide to break down and release the oxygen gas much faster.
The soap is used to help us “see” the reaction. Bubbles of oxygen become trapped in the soap, creating foam. The reaction occurs so quickly, releasing so much gas and creating so much foam, that the foam begins to flow out of the bottle. The result of this reaction looks like toothpaste being squeezed out of a tube.
In addition, the bottle will feel warm to the touch because the reaction is exothermic. An exothermic reaction or process is one that gives off energy. In contrast, an endothermic reaction or process is one that requires or absorbs energy.
HYPOTHESIS
uAdding yeast to hydrogen peroxide
will cause the hydrogen peroxide to
decompose quickly into water and oxygen gas, creating foam as the gas becomes trapped in liquid dish soap and pushes upward out of the bottle.
FORMULAS & EQUATIONS
Hydrogen peroxide is a relatively clear liquid substance. It is soluble in water and is often sold as a mixture of H2O2 in water. The hydrogen peroxide used in this experiment is actually a 6% solution of H2O2 in water.
The chemical formula for hydrogen peroxide is H2O2.
Hydrogen peroxide naturally decomposes into water and oxygen gas. The reaction is shown by the following equation:
2H2O2 (aq)g2H2O (l) + O2 (g)
The rate of the reaction can be increased by introducing a catalyst. In this experiment, the catalyst is yeast. Yeast is a microorganism that is part of the fungi family. Therefore, in the equation below, the catalyst is indicated above the arrow.
yeast
2H2O2 (aq) g 2H2O (l) + O2 (g)
The hydrogen peroxide used in the experiment is
actually a mixture of water and hydrogen peroxide.
CONNECT TO THE YOU BE THE CHEMIST CHALLENGE
For additional background information, please review CEF’s Challenge study materials online at http://www.chemed.org/ybtc/challenge/study.aspx.
• Additional information on elements, compounds, and physical and chemical changes can be found in the Classification of Matter section of CEF’s Passport to Science Exploration: The Core of Chemistry.
• Additional information on chemical reactions can be found in the Chemical Reactions section of CEF’s Passport to Science Exploration: Chemistry
Using your knowledge of the reflection, absorption, and transmission of mechanical waves, Why do you think the foam is used, and how do you think it functions?
Answers
make it look messy
Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time.
Answers
i hope that’s messy enough???
Which food combination produces a protein complete meal?
white rice and broccoli
brown rice and beans
white bread and cheese
peanut butter and jelly
Answers
Answer:
brown rice and beans
Explanation:
because the rice is really filling and healthy while beans have proteins
Answer:
the second option
Explanation:
hope this helps
PLease help Will give brainliest
Answers
Answer:
um ewww
Explanation:
10. i think is c
11. i think i d
Hope this helps!
11. a
I hope this helps
help with thisss please :)
Answers
Which water feature is often associated with condensation?
Frozen lakes
The ocean
Clouds and fog
Water vapor rising from plants
Answers
Clouds and fog are water features often associated with condensation. The correct option is C.
The process by which water vapour, a gaseous form of water, changes into liquid water is called condensation.
When warm, moist air meets a cooler surface or when the air itself cools, it happens. As a result of this cooling, water vapour loses energy and condenses into tiny water droplets or ice crystals, which are what are seen as clouds or fog.
Even though the ocean and frozen lakes are both connected to water, condensation is not a direct result of either of these. As opposed to condensation, water vapour rising from plants is a result of transpiration.
Thus, the correct option is C.
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Your question seems incomplete, the probable complete question is:
Which water feature is often associated with condensation?
A. Frozen lakes
B. The ocean
C. Clouds and fog
D. Water vapor rising from plants
Please help me ASAP!!!!
Answers
Answer:
1. A
2. A
3. C
Explanation:
please help!!!!!!!!!
how does staphylococcus infection affect the integumentary system?
Answers
Answer:
Staphylococcal infection can affect the: Skin: Most commonly, Staphylococcus aureus bacteria cause skin infection. This can produce boils, blisters, and redness on the skin.
Explanation:
Frozen ice caps in the Arctic Ocean are composed of?
A water vapor
B salt water
C fresh water
D a mixture of salt and fresh water
Answers
trigger warning/ su1cide
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-
-
how do you break up with someone over text because hes saying he’ll k1ll himself if you dont do what he wants you to do?
Answers
Answer:
tell his family about how he's manipulative or make him realize that even if you guys are still together you don't have feelings anymore
Answer:
what is the thing he wants you to do? this is hard. do you think he is serious and he will actually do it? if not, it's not worth the pain of staying in a relationship.
Explanation:
Has negative values
Group of answer choices
Celsius and Fahrenheit
Celsius and Kelvin
Fahrenheit and Kelvin
Answers
Answer:
Explanation:
Celsius and Fahrenheit
They have negative values but not Kelvin as its lowest is O Degree Kelvin.
Hope this helps!
BRAINLIEST ME PLS!!!
describe the conditions that affect the rate of a chemical reaction.
I NEED HELP WITH THIS PLEASE
Answers
Answer:
The rates at which reactants are consumed and products are formed during chemical reactions vary greatly. Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.
Explanation:
You are designing an office building. In order to reduce noise from high-frequency sounds between offices above and below each other, would you choose carpet on concrete or wood floors? Explain your answer.
Answers
Answer:
concrete has more mass and it will block more noise than than the wood plus the wood is thiner the thicker the substance is the better u won't hear noise
Explanation:
when heat is removed from a substance, describe how are the molecules affected
Answers
Explanation: When heat is removed from a substance, the kinetic energy of the molecules decreases (the molecules start to move more slowly).
The changes are caused by the tendency of the system to reach equilibrium and when the surroundings of the substance have lower kinetic energy, heat is transferred to reach thermodynamic equilibrium.
What's happening in whole is that there is a temperature gradient (difference) between the substance and its surroundings, and for eliminating this gradient, heat flows from the hotter substance to the colder surroundings, for them to have the same temperature.
The temperature of the substance decreases because its molecules have lower kinetic energy.
Help,
The question is down below
Answers
Answer:
C. A new gas was created and the gas took up more space
Answer:
C
Explanation:
Help?
The question is down below
Answers
Answer:
They need to have a full outer shell to be stable so they bond with each other and share electrons to become stable forming a compound.
Explanation:
Hope this helps!
What are the physical properties of the cookie/cracker? List 3 or more.
Answers
Answer
cookie
shape:circle
texture: bumpy rough on side
color:brown
size: bigger than a quarter
Explanation:
I cant see it so just describe the color shape size texture
Answer:
1. Delicious
2. Soft
3. Cronchyy (ik its crunchy )
4. Best foods you will ever eat
Explanation:
Try it for yourself!
Which has more thermal energy: a snowman or a lit match?
Group of answer choices
snowman
lit match
No answer text provided.
Answers
If Vanadium has an atomic number of 23 and an atomic mass of 50.9425u, how many neutrons are in one atom of Vanadium?
23
28
51
Answers
PLZZ HELPPP FRLLL IM GONNA GET MY LIFE ENDED
Answers
Answer: Local winds affect a smaller area while global winds affect a larger area
Explanation: This is because local winds affect certain areas and global winds go all around the planet
Which characteristic can be inherited?
acting ability
sense of humor
short temper
long toes
Answers
Answer:
acting ability i think hope it helps
Hello everybody! Can somebody help me please with these two questions? ( I don't know if it's really chemistry if not sorry! )
Answers
Answer:
1. C
2. B
Explanation:
1. Most living things need oxygen, water, and food to grow. ... Other living things eat plants or other animals for food. The cells of living things divide, allowing the living things to grow bigger and to change as they grow. The cells divide to form new cells that are different from the original cells.
2. The usual method of prokaryote cell division is termed binary fission. The prokaryotic chromosome is a single DNA molecule that first replicates, then attaches each copy to a different part of the cell membrane. When the cell begins to pull apart, the replicate and original chromosomes are separated.
Where does the fuel people use to heat homes and power cars come from?
A. the remains of plants and animals that lived long ago
B. sedimentary rock that is thousands of years old
C. factories make it from rocks
D. inside fossils found deep in canyons
Answers
Answer: im pretty sure its A
Explanation:
hi person
ASAP ILL MARK BRAINLIEST!!!!!! EASY
1. What is ocean acidification? How might it impact global biodiversity?
2. How can you as an individual help tackle this problem? (What specifically can you do?)
Answers
Answer:
1.Our results indicate that, at higher biodiversity, the impact of acidification on otherwise highly vulnerable key organisms can be reduced by 50 to >90%, depending on the species
2.Positive attitude is sometimes all it takes to turn a bad situation around. On the other side, a bad attitude can take a problem and quickly make it worse. Helps You Make Good Decisions – Anger clouds your judgement. When you let yourself get upset, you impact your ability to make good decisions.
What is another name for fiber?
Answers
Answer: Thread, strand, tendril and filament are all synonyms of fiber.
Explanation: Fiber is a thread from a vegetable tissue, mineral substance, or textile is formed. It's also a dietary material that contains cellulose, lignin, and pectin.
Let me know if you have any questions.
~ Lily, from Brainly.
There are many other names for fiber. Some of them are Carbohydrate, Non-starch polysaccharide, Dietary fiber, Crude fiber, Insoluble fiber, Soluble fiber, Resistant starch, Prebiotic fiber, and Functional fiber.
Fiber is a type of carbohydrate that the body cannot digest. It is found in plant foods, such as fruits, vegetables, grains, and legumes. Fiber is important for gut health, heart health, and weight management.
The different names for fiber reflect its different properties and functions.
For example, carbohydrate is the general term for all sugars, starches, and fiber.Non-starch polysaccharide is a more specific term for fiber that is not made up of starch.Dietary fiber is the term used to refer to all the fiber that is found in food. Crude fiber is a measure of the total amount of fiber in food, including both soluble and insoluble fiber.Insoluble fiber is the type of fiber that does not dissolve in water. Soluble fiber is the type of fiber that dissolves in water.Resistant starch is a type of starch that is resistant to digestion.Prebiotic fiber is a type of fiber that feeds the beneficial bacteria in the gut.Functional fiber is a type of fiber that has been shown to have health benefits beyond its basic function as a food source.Therefore carbohydrate, non-starch polysaccharide, dietary fiber, crude fiber, insoluble fiber, soluble fiber, resistant starch, prebiotic fiber, and functional fiber are just a few of the names given to fibers.
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Please please please help me!! Its urgent
Answers
Answer:
1. reproduction 2. fertilization 3. maturity
Pls help asap!!! BrainIdentify one source of carbon that can be found in each of these four spheres: atmosphere (air), geosphere (land), biosphere (living organisms) and hydrosphere (water).
liest to correct answer!!!
Answers
Answer:
It is carbon dioxide
Explanation:
All source relies on it Because if they dont have it then its not considered a source of anything else.Carbon dioxide refers to the source of carbon that can be found in each of the four spheres.
What is Carbon dioxide?This is an acidic colorless gas which are found in trace amounts in the ecosystem.
Plants use it to produce food and they act as sources of carbon thereby making it the most appropriate choice.
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READ THIS AND ANSWER THE QUESTIONS BELOW!!!!!!!!!1
Celestial bodies emit different types of radiation, only some of which can be detected by traditional telescopes. Radio waves are invisible rays that can be detected only by radio telescopes. A radio telescope functions like a television antenna. Radio waves from space are sensed by a gigantic parabolic reflector, which concentrates them toward the top of a focusing antenna. A radio receptor converts the radio waves into electrical signals which are amplified and then transmitted to the center of the parabola. They are then recorded and analyzed in the laboratory so that scientists can obtain a radio image of the source observed. The parabolic antenna can usually be oriented to detect radio waves from all directions of space. Some radio telescopes are fixed. The largest radio telescope in the world, located in Arecibo, Puerto Rico, is fixed. Built in a natural valley shaped like a giant parabola, its reflector measures 305 meters in diameter. Mobile detectors suspended from cables permit the scanning of one of part of the sky. Unlike traditional telescopes, radio telescopes can be used both day and night, even when there is cloud cover.
Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead?
What are the limitations of sending information using electromagnetic waves?
What are the differences between analog and digital signals?
What are the advantages of using digital signals over analog signals?
Using reliable internet sources, identify three ways we use analog and digital signals in our everyday lives.
Answers
Answer:1)The reason as to why scientists opt to transmit data at lower frequency instead of electromagnetic even if it can carry more data at a higher frequencies is because using higher frequencies of electromagnetic spectrum travel shorter distances but have higher data carrying capacity.So this physical characteristic of electromagnetic waves limits the range and availability of frequencies for sending information.
2) Limitations of using electromagnetic waves in sending communication
communication is a process of transmitting and receiving information in the form of signals.high technology communication use electromagnetic waves,there are various types of electromagnetic waves which are used in communication which include radio-waves,microwaves,infrared e.t.c some of their limitations are
i)Because there is limited number of broadcast frequencies the use of transmitters must be restricted in some way or they will seriously interfere with each other.
ii)Through the air signals can be distorted by atmospheric conditions and signals from space are sometimes distorted by solar activity
iii)physical activities such as mountains and buildings can prevent or interfere with some transmissions
iv)Through the air signals are not private,so any tuned receiver within the range can pick up them.
3)Differences between digital and analogue signals
Analogue and digital signal are used to transmit information usually through electric signals.
An analogue signal is continuous wave denoted by sine wave and may varry in signal strength (amplitude) or frequency(time) an example is sound from human voice is analogue because waves are continuous..
A digital signal is a signal in which the original information is converted into a string of bits before being transmitted .example a must for computer processing where is described as using (0s and 1s)and therefore can not take any fractional value.
4)Advantages of using digital signals over analogue signals
one advantage of digital signals are inherently less susceptible than analog signals to interference caused by noise because with digital signal it is not necessary to evaluate precise amplitude,frequency or phase.
Another advantage based in capacity is that digital signals carry more information per second than analogue signals.
Digital signals maintain their quality over long distances better than analogue signals.
5)How we use digital and analogue signals in our everyday live
digital signal processing is the way of life of current generation
example is mobile phones do alot of digital signal processing .they process our our speech digitally to remove background noise,echo e.t.c
Television also do a lot of digital processing of video,audio signal to present them in a better way.
How radio telescopes are used to explore space
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.It has several main parts, a dish and antenna,a receiver,a detector and an analyzer.The dish collects the radio signals from space ad focuses them on the antenna.
6)How radio waves are used on earth
Radio waves are used to transmit television and radio programs They have longer wave lengths and are reflected by the ionosphere
7) Reasons why telescopes convert radio waves (analog) to electrical(digital) signals for analysis
This is because signals can be easily stored and transmitted in digital form.The analog is continuous in time and it is necessary to convert this to a flow of digital values.
Explanation:
couldnt make my own so...
Answer:
Explanation:
READ THIS AND ANSWER THE QUESTIONS BELOW!!!!!!!!!1
Celestial bodies emit different types of radiation, only some of which can be detected by traditional telescopes. Radio waves are invisible rays that can be detected only by radio telescopes. A radio telescope functions like a television antenna. Radio waves from space are sensed by a gigantic parabolic reflector, which concentrates them toward the top of a focusing antenna. A radio receptor converts the radio waves into electrical signals which are amplified and then transmitted to the center of the parabola. They are then recorded and analyzed in the laboratory so that scientists can obtain a radio image of the source observed. The parabolic antenna can usually be oriented to detect radio waves from all directions of space. Some radio telescopes are fixed. The largest radio telescope in the world, located in Arecibo, Puerto Rico, is fixed. Built in a natural valley shaped like a giant parabola, its reflector measures 305 meters in diameter. Mobile detectors suspended from cables permit the scanning of one of part of the sky. Unlike traditional telescopes, radio telescopes can be used both day and night, even when there is cloud cover.
Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead?
What are the limitations of sending information using electromagnetic waves?
What are the differences between analog and digital signals?
What are the advantages of using digital signals over analog signals?
Using reliable internet sources, identify three ways we use analog and digital signals in our everyday lives.
Answer:
Explanation: