Answer:
Paper
Explanation:
In chromatographic separation, two different phases are important; a stationary phase and a mobile phase.
The stationary phase is the phase that does not move. Substances are separated based on how fast or slowly they move in the stationary phase.
The mobile phase is usually the solvent(or mixture of solvents) that carries the solutes through the stationary phase.
The stationary phase is usually composed of a porous material. Paper is a porous material. The mobile phase is trapped between the cellulose fibers of the paper and separation is achieved.
Plants carry out photosynthesis to make sugar from carbon dioxide and water.
True or false?
Answer:
la re spuesta en verdadero
Answer:
True
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
name the first artificially prepared fiber
. nylon
. rayon
. silk
. polymers
Answer:
Nylon
Explanation:
Nylon was the first synthetic fiber made in the "fully synthetic" sense of that term. It was made by Wallace Carothers, an American researcher at the chemical firm DuPont in the 1930s.
what's the FM of chlorine
Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
what events are typically earthquakes near large bodies of water
Answer:
tsunamis
they are literally water earthquakes that force tons of water ashore and wipes out cities and towns
Energy is absorbed when a material ________ and is released when a material _______.
A. evaporates, melts
B. freezes, melts
C. melts, freezes
D. freezes, condenses
2. How old are the oldest fossils? Oldest rocks?During what period were these found?
IT
Answer:
Fossils: 3.5 billion. Rocks: 4.28 billion
they were found during Haden Eon
Explanation:
What would take light the longest to travel across?
Group of answer choices
galaxy
universe
nebula
star
Answer:
Galaxy ?
Explanation:
how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide
Answer:
CaCO3 + 2 HCl => CaCl2 + CO2 + H2O
Explanation:
CO2 will burst out when the reaction occurs in water, and the ions will be dissociated: Ca(2+) + 2 Cl (-)
The population of Yuba City, California is 61,360 people. What is 61,360 rounded to the nearest thousand? *
Answer:
61,000
Explanation:
HELP ME THE WHOLE PAGE !!!! Someone help please
Answer:
In the image below
Explanation:
Hope this helps you :)
Please answer both 7 and 8
How can the arrangement of atoms help explain how the white phosphorous and red phosphorous can both be pure phosphorous substances? Cite your evidence
Answer:
white phosphorus is P4 in a tetrahedral shape and there are some really cool videos of it reacting in air and some not very cool ones where it was used militarily it is not stable, it needs to be stored underwater
red phosphorus is a larger more complicated network solid with many more phosphorus and is very stable
they are allotropes of phosphorus
Explanation:
Some farmers of vegetables and fruits from flowering plants pay beekeepers to bring their beehives to their land each year. Why is this?
1. Flowering plants rely on pollinators to survive.
2. Flowering plants depend on bees for self-pollination.
3. Bees help protect their crops.
4. Bees eat the sweet nectar of the fruits that grow.
Answer:
option 2nd is correct answer of this question
Some farmers of vegetables and fruits from flowering plants pay beekeepers to bring their beehives to their land each year because flowering plants depend on bees for self-pollination. Therefore, option 2 is correct.
What is self pollination ?Self pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower in the same plant or to a different plant that is genetically similar.
Many crops, but not all, self-pollinate. Beans, broccoli, cabbage, carrots, cauliflower, corn, kohlrabi, onions, and peppers are examples. Apples, cherries, peaches, and pears are among the fruit trees that self-pollinate.
Because flowering plants rely on bees for self-pollination, some farmers of vegetables and fruits from flowering plants pay beekeepers to bring their beehives to their land each year.
Thus, option 2 is correct.
To learn more about the self pollination, follow the link;
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What are valance electrons used for?
Answer:
In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Help me please, I am confused
Answer:
.....
Explanation:....
When you add something to water to decrease The freezing point what is this called?
(I’ll mark you as brainlister)
What is isostatic rebound in simple words?
Explanation:
Isostatic rebound (also called continental rebound, post-glacial rebound or isostatic adjustment) is the rise of land masses that were depressed by the huge weight of ice sheets..
How is Earth’s outer layer different from a cracked hard-boiled egg?
A balloon occupies 1.50 L with 0.205 mol of carbon dioxide. How many moles would be required to increase the size of the balloon to 5 L?
Answer:
0.683 moles of the gas are required
Explanation:
Avogadro's law relates the moles of a gas with its volume. The volume of a gas is directely proportional to its moles when temperature and pressure of the gas remains constant. The law is:
V₁n₂ = V₂n₁
Where V is volume and n are moles of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
1.50Ln₂ = 5L*0.205mol
n₂ = 0.683 moles of the gas are required
Imperial shrimp attach themselves to sea cucumbers for transportation. The interaction saves energy and improves food availability for the shrimp. The sea cucumber is not affected by the interaction. What type of interaction exists between the shrimp and the sea cucumber?
commensalism
competition
mutualism
parasitism
please help
Answer:
a
Explanation:
commensalism
A student has a balloon with a volume of 2.5 liters at a temperature of 20°C. As the
day warms up to 40°C the student notices their balloon changing size. What is the
new volume of the student's balloon?
approximately 3 liter
because when we round of 2.67it will be 3
Why might changes in the Arctic affect the climate across the globe?
Answer:
Melting ice speeds up climate change.
Explanation:
The Arctic helps to regulate the world's temperature, so as more Arctic ice melts the warmer our world becomes.
What is the solute and solvent in a solution of salt water?
Select one:
a.Water is the solvent; Salt is the solute
b.Water is the solvent; Salt is the solvent
c.Water is the solute; Salt is the solute
d.Water is the solute; Salt is the solvent
Answer:
A
Explanation:
solute- thing being disolved
solvent- thing doing the disolving
so water is a solvent and salt is solute.
which is A
if my answer helps please mark as brainliest.
In the solution of salt and water, Water is the solvent; Salt is the solute. That is option A.
What is a solute and a solvent?A solute is defined as the part of a solution that is being dissolved by the solvent. A typical example of solute is base and salts.
A solvent is defined as the dissolving part of a solution which is usually liquid in form. A typical example is water.
Therefore, the solute and solvent of a solution would be salt and water respectively. That is option A.
Learn more about solvent here:
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The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide?
Report your answer with the correct number of significant figures.
Answer:
Area = 51.74cm ²
Explanation:
5.6 × 9.4 = 51.744
Round above answer
= 51.74
The temperature inside my refrigerator is about 4° Celsius. If I place a
balloon in my fridge that initially has a temperature of 22° C and a volume
of 0.5 liters, what will be the volume of the balloon when it is fully cooled
by my refrigerator?
Answer:
The volume will be 0.47 L
The answer is the volume of the balloon when it is fully cooled by the refrigerator is 0.47 L
What is Charles Law ?If the pressure remains constant , Volume is directly proportional to temperature
[tex]\dfrac{V^{1} }{T^{1} } = \dfrac{V }{T }[/tex]
The data given in the question ,
When Solving Gas Law Problems , we need to convert degree Celsius to Kelvin.
kelvin = degree Celsius + 273.15
T2 (final temperature) in Kelvin = 4 + 273.15 = 277.15K
T1 (initial temperature) in Kelvin = 22 + 273.15 = 295.15 K
V1 (initital volume) = 0.5 L
V2 (final volume) = unknown ?
[tex]\dfrac{V^{1} }{277.15 } = \dfrac{0.5 }{295.15}\\\\V^{1} \;\;\; \;\;\;= \dfrac{0.5\times 277.15}{295.1 5} \\\\V^{1} \;\;\; \;\;\;= \;0.47\; litres[/tex]
Thus , the volume of the balloon when it is fully cooled by the refrigerator is 0.47 litres.
To know more about Charles Law
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name the following compound Hg2S
Atomic number of Sodium?
Answer:
11
Explanation:
Answer:
Atomic number of sodium is 11.
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na. The free metal does not occur in nature, and must be prepared from compounds.
What is true about the particles in a substance? Select all that apply.
Particles in all states of matter are arranged close
together.
Heating a substance can cause the substance to
change state.
The way particles move changes when the
substance's thermal energy changes.
Particles in all states of matter are constantly
moving.
Submit
Answer:
Heating a substance can cause the substance to change state
The way particles move changes when the substance's thermal energy changes.
Particles in all states of matter are constantly
moving.
Those are all correct and apply to water in all three phases
Construct an explanation using Newton's Laws of Motion to describe the effects of balanced and unbalanced forces
on the motion of an object.
Answer:
newton's 3 laws state:
- an object in motion stays in motion (unless an external force acts on it)
- every action has an opposite but equal reaction
- force= mass x acceleration
Elements that do not have full outer electron shells will donate, share, or take from other atoms. Choose the items that have the correct binary ionic formula. (brainliest)
Answer:
Ok...
Answer: YTH/JYG
Explanation:
AI+ZN+H=YTH
Answer:Potassium and sulfur form KS2
Sodium and calcium form Na2Ca
Beryllium and nitrogen form Be3N2
Explanation:
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