Answer:
Metabolism
Explanation:
This is called Metabolism.
Metabolism is a combination of spontaneous chemical reactions which release non-spontaneous energy and chemical reactions requiring energy to proceed. In order to perform cellular processes, living organisms can take energy from food, nutrients or sunlight.
What is the Great Red Spot on Jupiter?
Answer:
The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth. The Great Red Spot has slowly changed over the years, and is currently about 1.3 times as wide as our planet.
what element has 5 protons, 7 electrons, and 6 neutrons
Answer: Boron
Explanation: lol
Answer:
Boron. (What kind of name is that?????????????)
Explanation:
What does the reaction rate measure?
O A. The collisions per second
O B. The speed of the reaction
C. The reaction activation energy
O D. The moles per liter of product
Answer:
The speed of the reaction
Explanation:
I just took the test and got it right... i hope this helps u :)
how humans can improve the negative aspects of soil use FULL SENTENCES 50 POINTS PLEASE HELP
Answer:
Using diverse nutrient sources can help maintain soil health. Manure and compost add organic matter as well as an array of nutrients, but using just compost or manure to meet the nitrogen needs of the crop every year can result in excessive phosphorus levels in the soil.
pleaaseeee help im failing so bad3
Calculate the value of Key in the following reaction if the equilibrium concentrations are
[H2S] -0.25 M, (H2) - 0.88 M, [S2] -0.44M.
2 H2Sig) = 2 H2(g) + S218)
Answer:
The value of the equilibrium constant Kc is 5.45
Explanation:
The "Law of Mass Action" states:
"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."
This constant was called the equilibrium constant. For a reaction:
aA + bB ⇄ cC + dD
the equilibrium constant Kc is:
[tex]Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }[/tex]
In this case, the balanced reaction is:
2 H₂S → 2 H₂ + S₂
So, the equilibrium constant Kc is:
[tex]Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2} }[/tex]
The equilibrium concentrations are
[H₂S] =0.25 M[H₂]= 0.88 M[S₂]= 0.44MReplacing in the definition of equilibrium constant:
[tex]Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2} }[/tex]
Solving:
Kc= 5.45
The value of the equilibrium constant Kc is 5.45
(No scammers) can someone help me pls
Answers is - 198 kilo joules
What is the chemical formula for this?
Answer:
-OOH
Explanation:
This forms an acid if it comes in contact with a metal
Answer:
HO2; Hydroperoxyl
Explanation:
Since there are two oxygen molecules, and one hydrogen molecule, it can be classified as a hydroperoxyl molecule.
It is an inorganic compound with the following characteristics
Covalent compound (O,H are nonmetals) Valence of O (O must form an octet): 6 Valence of H: 1 Total valence electrons: 13 Molar mass: 33.01 g/molwhat is 606 as a 2 sig fig answer?
6, 0
thats the answer, i hope it helps
Write a short paragraph about how gases are all around you. Provide at least 2 examples
Answer:fart and carbon are all around is
Explanation:
 why don't we ever see solid or liquid oxygen on earth?
What is the mass of 5.6 moles of Iron (III) Oxide?
Answer:
312.731
Explanation:
it had a long answer but im sure ur teacher wanted u to round it
hope this helps!
~goldfishareswag/brianna
:)
please help me with this question
Answer: I believe it would be B. Genus
Explanation:
I looked up the definitions for you and genus is defined as the group above species. Picture of definition attached.
Part A
Campers want a travel cup that keeps the temperature of a beverage from changing for up to two hours.
They may want to keep a hot drink hot when they are in a cold place. Or they may want to keep a cold drink
from warming up in a hot environment,
Describe how you plan to design, build, and test a travel cup that uses thermal insulators?
The statement is "thermal insulators of a double-layered vacuum seal make a liquid heated when it's cold and keep it cool when it's hot."
What is thermal insulator?A thermal insulator is a material that inhibits heat from being conveyed from one location to another.
Campers seek a travel cup that cools liquids with a cold pack. Design the exterior portion of the cup to keep the drink cold after it has cooled down, as well as the interior compartment to contain the cold pack and channel heat from the liquid in the cup. One of the greatest ways to keep your coffee hot for a long time is to use vacuum insulation in a thermos. On the surface, the concept appears straightforward.
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Magnetic poles are called domains.
True
False
Answer:
false
Explanation:
the magnetic domains in the area around a magnet where the force acts.
Which of the following is an indication that a substance has undergone a chemical change?
A.
No new product has been formed.
B.
The color of the substance has not changed.
C.
The original constitute has not changed.
D.
The molecular structure has changed.
Answer:
D.
Hope it helps!!!!!!!!!
There
are
approximately
317,000,000
people
in
the
U.S.,
and
the
area
of
the
U.S.
is
about
4,000,000
square
miles.
If
the
people
were
spread
out
evenly,
about
how
many
people
are
there
per
square
Answer:
yesddgfhzxhcvnjxkcncjzdkccchjjbxbxbbk
I used a stick of (vegan) butter as our example of thinking about how temperature changes the properties of something when it is wamer or cooler.
1. What is something else you could use to describe how temperature affects the properties of when it is warmer or cooler? How does this change whether it is warm or cold. Describe it.
Please help me on this
Answer:
the answer is 3(decay) and
the second isa 1(alfa particle) has a mass of equal to helium nucleus
moreee help science plsssssssssssssssss helpp
The shape of the directly sunlit portion of the Moon as viewed from
Earth
your answer:
lunar phases
1. A student mixes two liquids together and notices that a white solid has formed
at the bottom of the container.
What can the student conclude?
1. A precipitate has formed.
2. A physical change has occurred.
3. A chemical reaction has occurred.
4. A chemical change has occurred.
Answer:
3. A chemical reaction has occured
A student mixes two liquids together and notices that a white solid has formed at the bottom of the container which means precipitate has formed.
What is precipitation reaction ?
Precipitation is the process of creating an insoluble compound in chemistry by either reacting two salts or altering the temperature to alter the solubility of the compound. Additionally, the solid that results from a precipitation reaction is referred to as "precipitate."Precipitation can be a sign that a chemical reaction has taken place, but it can also happen if the concentration of a solute is higher than its solubility. The process of small, insoluble particles aggregating together or forming an interface with a surface, such as the container wall or a seed crystal, is known as nucleation, and it occurs before precipitation.Precipitation is the process of transforming a liquid into a solid. A precipitant is a chemical that gives rise to a solid in a liquid solution. The term "precipitate" refers to the resulting solid. In the event that the molecule size of the insoluble compound is tiny or there is deficient gravity to attract the strong to the lower part of the compartment, the hasten might be equitably dispersed all through the fluid, shaping a suspension. Any process that separates the precipitate from the solution's liquid portion, known as the supernatant, is referred to as sedimentation. Centrifugation is a common technique for sedimentation. A "flower" is a powder that forms after the precipitate has been recovered.
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HURRY!!!!!! HELP PLEASEEE
To begin the experiment, 1.65g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 18.98oC. The specific heat of water is 4.184 J/g oC. The heat capacity of the calorimeter is 615 J/ oC . After the reaction the final temperature of the water is 36.38oC.
2. Calculate the change in temperature, ΔT. Show your work. (1pt)
3. Calculate the heat absorbed by water. Use the formula qwater = m • C • ΔT
Show your work (2pts)
4.Calculate the heat absorbed by the Calorimeter. Use the formula:
qcal = Ccal • ΔT Show your work. (2pts)
5. The total heat absorbed by the water and the calorimeter can be calculated by adding the heat calculated in steps 3 and 4. The amount of heat released by the reaction is equal to the amount of heat absorbed with the negative sign as this is an exothermic reaction. (2pts)
a.Using the formula ΔH = - (qcal + qwater ) , calculate the total heat of combustion. Show your work.
b. Convert heat of combustion (answer from part a) from joules to kilojoules. Show your work.
6. Evaluate the information contained in this calculation and complete the following sentence: (2pts)
This calculation shows that burning _______ grams of methane [TAKES IN] / [GIVES OFF] energy (Choose one).
7. The molar mass of methane is 16.04 g/mol. Calculate the number of moles of methane burned in the experiment. Show your work. (2pts)
8. What is the experimental molar heat of combustion in KJ/mol? Show your work. (2pts)
9. The accepted value for the heat of combustion of methane is -890 KJ/mol . Explain why the experimental data might differ from the theoretical value in 2-3 complete sentences. (2pts)
10. Given the formula:
% error= |(theoretical value - experimental value)/theoretical value)| x 100
Calculate the percent error. Show your work. (2pts)
The calorimter is equal to the heat released by the reaction. Calculate the heat released by the reaction.
What is the reaction?The reaction to the news can vary depending on who you are speaking to. For some, the news may be welcomed as a sign of progress and a move in the right direction. Others may be apprehensive, uncertain of the potential outcomes or changes that may come as a result. Some may be angry and frustrated, feeling as though the news has been a long time coming and they have not been given a say in the matter.
1. ΔT = 36.38oC - 18.98oC = 17.4oC
2. qwater = m • C • ΔT
qwater = (1000g)(4.184J/g oC)(17.4oC)
qwater = 71376.8 J
3. qcal = Ccal • ΔT
qcal = (615J/ oC)(17.4oC)
qcal = 10666.1 J
4. qreaction = qwater + qcal
qreaction = 71376.8 J + 10666.1 J
qreaction = 82042.9 J
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Which of the following is a TRUE statement?
a.
A molecule always has three types of elements present
b.
Compounds always include the elements hydrogen and sodium
c.
Compounds include things we use in our everyday lives
d.
All elements prefer to hang out with other elements and form molecules
Answer:
b
Explanation:
H IT H-C --H + Ħ Н The model above shows the structural formula for ethane. What is the chemical formula for ethane? OA. C2H6 OB. 2CH3 Oc. 8CH OD. C6H2
Answer:
B
Explanation:
which pollutants come from air? How and why do these form?
Answer:
Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.
Explanation:
A projectile is projected with an initial velocity of 40 m/s at a 45o angle to the horizontal. , calculate the total time travelled.
Answer:
5.77 s
Explanation:
From the question,
The total time travelled by the projectile = Time of flight (T)
T = 2usinθ/g............ Equation 1
Where T = Time of Flight of the projectile, u = Initial velocity, θ = Angle of projection to the horizontal, g = acceleration due to gravity
Given: u = 40 m/s, θ = 45°
Constant: g = 9.8 m/s²
Substitute these values into equation 1
T = 2(40)sin(45°)/9.8
T = 80sin(45°)/9.8
T = 80×0.7071/9.8
T = 5.77 s
An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is very reactive. How many neutrons are in this atom?
Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.
Answer:
There are 20 neutrons in this atom.
Explanation:
Which pieces of equipment are
needed to calculate the velocity of a
falling object?
A stopwatch and balance
B speedometer and magnet
C compass and tape measure
D tape measure and stopwatch
help? It would honestly mean a lot :(
Answer:
1 1
5 2
6 1
8 3
10 3
6 3
9 3
13 3
Explanation:
First of you add the subscripts (the little numbers after the letters) and multiply the big numbers before the letters together to get the number of atoms
For Example:
O= 1 atom
Si{2}= 2 atoms
Mg{5}C{6}= 11 atoms
3Na{2}= 6 atoms
O(SiNa){2}= OSi{2}Na{2}= 5 atoms
Each Capital letter is a new Element
For Example:
O = 1 Element
NaSi = 2 Elements