Answer:
the double helix of dna is, like its name, implies, in the shape of a helix which is essentially a three-dimensional spiral. the double comes from the fact that the helix is made of two long strands of dna that are intertwined—sort of like a twisted ladder.
Explanation:
hope this helps :)
have a nice day !!
Colin decided to investigate soil erosion by water. He measured rates of erosion on
model hills made of soil, rock, and sand. Which of the following was the test
(independent) variable?
Answer:
i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...
the steepness of the models hillside
or
the rate of erosion on the hills
so the answer is either...
the amount of water sprayed on the hills
or
the type of material used to construct the model hills
but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)
Explanation:
Different substances have....
A.the same properties
B. different properties
C.similar properties
D.all properties
Answer:
Different properties
Explanation:
They are different.
Which of the following lines from the story indicates a flashback?
Will award brainliest! Between which two ionization energies would you expect to see the biggest jump for calcium? A. 11-12
B. 12-13
C. 13-14
D. 14-15
answer:lettter B that is answer
formation of ionic bond is affected by
Answer:
Ionization energy, electronegativity, and lattice energy are the factors that influence the formation of ionic bonds of elements.
Which body systems is your blood a part of? Your answer
Location closer to the
equator receives less energy
from the sun.
True or false
Answer: true
Explanation:
Hope this helps
What controls the movement of material between the inside of the cell and the outside world?
Group of answer choices
Nucleus
Cell membrane
Cytoplasm
Vacouoles
Answer:
Cell membrane
Explanation:
What happends when you put m&ms in warm water for 2-3 minutes
Answer:
The m & m logo floats off of it. Its a fun experiment. I did it before
Explanation:
Hope that helped
If 95 grams of Iron are needed to react with sulfur, how many grams of sulfur are involved in this reaction?
2 Fe + 3 S=Fe2S3
Answer:
82 g S
Explanation:
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 81.6 grams of sulfur are involved in this reaction.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
2 Fe + 3 S[tex]\rightarrow[/tex]Fe[tex]_2[/tex]S[tex]_3[/tex]
mass of iron = 95 grams
Molar mass of iron=55.8450 g/mol
number of moles of iron =Given mass÷ Molar mass of iron
number of moles of iron=95÷ 55.8
number of moles of iron=1.70 moles
The mole ratio between iron and sulfur is 2:3
moles of sulfur = (3/2) moles of iron
moles of sulfur = (3/2)×1.70
moles of sulfur=2.55 moles
Mass of sulfur= number of moles of sulfur× Molar mass of sulfur
=2.55× 32
=81.6g
Therefore, 81.6 grams of sulfur are involved in this reaction.
To know more about mole, here:
https://brainly.com/question/15209553
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When we look at a plant we notice that the leaves are green this is due to the
Actually If you look very close to a plant you see this:
And to answer your question leaves are green due to sun nutrients water and im not sure what else
Please help with q2
A) Vinegar is an Acid solution while, Ammonia is a basic solution, so when they react they form a neutral solution,
Therefore this is a neutralization reaction
B) The lower the pH value of a solution, the more acidic it is, and vise versa for basic,
In the table Vinegar has the lowest pH value, of 3. Therefore Vinegar is the most acidic in the table
C) The higher the pH value of a solution, the more basic it is
In the table Ammonia has the highest pH value of 12. Therefore Ammonia is the most basic in the table
Happy to help :)
If you need any more help, you can ask me
help meeeeee please
Answer:
B because the particles of the container 2 is faster thus having more kinetic energy and heat
Explanation:
Calculate the number of grams of nitrogen dioxide that are produced from 4 moles of nitric oxide
Answer:
hope this help by the way found off of yahoo
Explanation:
Calculate the number of grams of nitrogen dioxide that are produced from
4 moles of nitric oxide.
2NO(g) + O2(g) -->2NO2(g)
I really need help with this... I need to know how to work it too... I can balance it out but not sure about grams... This is it balanced out with 4 moles of nitric oxide
4NO(g) + 2O2(g) ->4NO2(g) please help and explain i want to learn this
Which ion concentration does the pH scale measure? How long is the scale?
yo fm on ig chs_luucy. ill give u brainleist .
Answer:
this is a homework app, not a tell people to follow your ig app
Explanation:
Through photosynthesis, plants use the energy in sunlight to convert water and
carbon dioxide into sugar and oxygen. Has a chemical or physical change occurred?
Explain your answer.
Answer:
chemical change occured
Calculate the number of moles in 85.0 g of carbon tetrafluoride (CFA).
Show Your Work
what element is A??????
Which type of a reaction is best represented by the equation - AB + CD → AD + BC?
Answer:
AB + CD → AD + BC
Explanation:
This is a double displacement reaction. It is also known as precipitation reaction.
Science, please help and thank you!!
Describe a sodium (Na) atom and a chlorine (Cl) atom
Answer:
Both in group 1
Explanation:
Sodium is a very reactive metal
Chlorine is a very reactive non metal
Both have one Valence electron
A student makes observations about a piece of copper. Which
observation describes a chemical property of the copper? (*hint: anything
relating to "measurements" of something is a physical property) *
A. it has a mass of 63.546 grams
B. corrosion occurs when it is exposed to air
C. it has a density of 8.96 g/cm^3
Answer: b
Explanation:
Please help and thank you
Answer: Its c
Explanation: i did it
What type of substance do these statements describe?
- It is a long chain.
- It contains carbon, hydrogen, and oxygen atoms.
- It has double bonds.
- It is insoluble in water.
- It is used for energy storage in living things.
carbohydrate
lipid
monosaccharide
protein
Answer:
lipid
Explanation:
I just know the answer i don't really have a explanation sorry
Answer:
lipid
Explanation:
edge 2021
Help please see attached screenshot
Answer:
balanced equation of glucose
6CO2 + 6H2O----------C6H12O6 + 6O2
in the presence of sun light.
Due Tomorrow!
What is [OH-] of a solution
with a pH of -1.0?
Answer in M
I have to re ask this but pls help me I don't have a lot of time
Answer:a
Explanation:
Answer:
Hello there!
If i'm doing this correctly it is A (125 g).
Hope that helped, if I wasn't correct feel free to tell me.
Have a great day!
A sample of methane gas, CH4, occupies 3.25 L at temperature of 19.0 o C. If the pressure is held constant, what will be the temperature be if the volume expands to 10.00 L?
Answer:
625.46 °C
Explanation:
We'll begin by converting 19 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
T(°C) = 19 °C
T(K) = 19 °C + 273
T(K) = 292 K
Next, we shall determine the Final temperature. This can be obtained as follow:
Initial volume (V₁) = 3.25 L
Initial temperature (T₁) = 292 K
Final volume (V₂) = 10 L
Final temperature (T₂) =?
V₁/T₁ = V₂/T₂
3.25 / 292 = 10 / T₂
Cross multiply
3.25 × T₂ = 292 × 10
3.25 × T₂ = 2920
Divide both side by 3.25
T₂ = 2920 / 3.25
T₂ = 898.46 K
Finally, we shall convert 898.46 K to celsius temperature. This can be obtained as follow:
T(°C) = T(K) – 273
T(K) = 898.46 K
T(°C) = 898.46 – 273
T(°C) = 625.46 °C
Therefore the final temperature of the gas is 625.46 °C
please ive been stuck on this one forever
Answer:
Melting-Solid-Liquid-Added
Freezing-Liquid-Solid-Removed
Vapourization-Liquid-Gas-Added
Condensation-Gas-Liquid-Removed
Sublimation-Solid-Gas-Added
Deposition-Gas-Solid-Removed
Explanation:
ASAP!!!
As current flows through a system, what happens to the voltage available at each load?
Answer:
The relationship between Voltage, Current and Resistance forms the basis of Ohm's law. In a linear circuit of fixed resistance, if we increase the voltage, the current goes up, and similarly, if we decrease the voltage, the current goes down.