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C: third one
A: Third one
Related Questions
Help me please, I am confused
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Answer:
.....
Explanation:....
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?
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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
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.
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Answer:
Area = 51.74cm ²
Explanation:
5.6 × 9.4 = 51.744
Round above answer
= 51.74
How is Earth’s outer layer different from a cracked hard-boiled egg?
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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)
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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:
i took the quiz
Why might changes in the Arctic affect the climate across the globe?
Answers
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.
How can the arrangement of atoms help explain how the white phosphorous and red phosphorous can both be pure phosphorous substances? Cite your evidence
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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:
If you have 23 g of Lithium oxide, what is the volume of Oxygen that is produced? _____ Li2O2 + _____ H2O _____ LiOH + _____ O2
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Answer:
1st step : find the number of moles for the known substance
number of moles =mass/ relative molecular mass
n=23/Li2O2
n=23/(14+32)
n =23/46
n= 0,5moles
2nd step : balance the equation
2Li202 +2H20-----> 4LiOH +O2
3rd step : find the mole ratio of the known or stated using the balanced equation
Li2O2 : O2
2 : 1
4th step :find the number of moles for the asked using the mole ratio using simple proportion
Li2O2 :O2
2 :1
0,5 :???
0,5/2 ×1
= 0,25moles for (O2)
5th step : find the asked either mass , volume , concentration
number of moles = volume/molar gas volume
volume = number of moles × molar gas volume
v = 0,25moles × 28dm^3
v= 7 dm^3 of (O2)
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
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Answer:
a
Explanation:
commensalism
how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide
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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 (-)
What eventually happens to all the energy in a food web? The energy in a food web finally??????
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Answer:
All of the consumers and producers eventually become nourishment for the decomposers.
Explanation:
Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.
What are valance electrons used for?
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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.
Plants carry out photosynthesis to make sugar from carbon dioxide and water.
True or false?
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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.
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.
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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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Energy is absorbed when a material ________ and is released when a material _______.
A. evaporates, melts
B. freezes, melts
C. melts, freezes
D. freezes, condenses
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When you add something to water to decrease The freezing point what is this called?
(I’ll mark you as brainlister)
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what's the FM of chlorine
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Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
name the first artificially prepared fiber
. nylon
. rayon
. silk
. polymers
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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.
HELP ME THE WHOLE PAGE !!!! Someone help please
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Answer:
In the image below
Explanation:
Hope this helps you :)
Please answer both 7 and 8
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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?
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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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2. How old are the oldest fossils? Oldest rocks?During what period were these found?
IT
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Answer:
Fossils: 3.5 billion. Rocks: 4.28 billion
they were found during Haden Eon
Explanation:
what events are typically earthquakes near large bodies of water
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Answer:
tsunamis
they are literally water earthquakes that force tons of water ashore and wipes out cities and towns
An object should float in a liquid if it is
A. less dense than the liquid
B. more dense than the liquid C. shaped like a ball
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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?
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approximately 3 liter
because when we round of 2.67it will be 3
Can somebody plz help answer these questions correctly thanks!!! :D (doesn’t have to be long) :3
WILL MARK BRAINLIEST WHOEVER ANSWERS THIS FIRST :DD
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wind power is:- Wind power or wind energy is the use of wind to provide mechanical power through wind turbines to turn electric generators for electrical power. Wind power is a popular sustainable, renewable source of power that has a much smaller impact on the environment compared to burning fossil fuels
it's work :-Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.
Disadvantages:-
The wind is inconsistent. ...
Wind turbines involve high upfront capital investment. ...
Wind turbines have a visual impact. ...
May reduce the local bird population. ...
Wind turbines are prone to noise disturbances. ...
Installation can take up a significant portion of land. ...
Wind turbines can be a safety hazard
Advantages:-
Wind power is cost-effective. ...
Wind creates jobs. ...
Wind enables U.S. industry growth and U.S. competitiveness. ...
It's a clean fuel source. ...
Wind is a domestic source of energy. ...
It's sustainable. ...
Wind turbines can be built on existing farms or ranches.
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
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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
name the following compound Hg2S
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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
Answers
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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Atomic number of Sodium?
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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.