Answer: Lithium (Li)
Explanation:
Once it loses its only valence electron, there’s no longer a negative charge.
Need help with these two pls!!
what is a fire piston?
*a tool for starting a fire, likely invented in Ancient Southeast Asia.*
dont know the second one lol.
I need the answers to this question please
The options are
A.0.17g/cm^3
B.5.38g/cm^3
C.0.05g/cm^3
D.8g/cm^3
Answer:
Before submerged 150ml
After submerged: 180ml
rock volume: [tex]180 - 150 = 30[/tex]
formula for density:
[tex] \frac{mass}{volume} = 5.38 [/tex]
[tex] \frac{175}{30} = 5.38 [/tex]
THE ANSWER IS b
prettty sure this is wrong but eh :/ probably correct
Over long periods of time, some species have become extinct, while new species have
descended from earlier species. These changes are known as:
Evolution
Mutation
Natural selection
Adaption
Answer:
Adaption
The reason why its adaption is because some species become extinct due to not adapting to world changes, while newer species can adapt to world changes.
Hope this helps!
A volume of 5.0 L of air at 20°C is expelled from a container where it is instantly warmed to 50°C. Calculate the new volume that the air occupies at this temperature.
Answer: The new volume that the air occupies at this temperature is 5.5 L
Explanation:
To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
where,
[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.
[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.
We are given:
[tex]V_1=5.0L\\T_1=20^oC=(20+273)K=293K\\V_2=?\\T_2=50^0C=(50+273)K=323K[/tex]
Putting values in above equation, we get:
[tex]\frac{5.0}{293}=\frac{V_2}{323}\\\\V_2=5.5L[/tex]
Thus the new volume that the air occupies at this temperature is 5.5 L
Question 3 of 10
5 Points
Match the approximate percentage of the world's water to where it is stored.
Salt water
97 percent
Ice caps and
glaciers
2 percent
Fresh liquid
water
1 percent
Answer:
salt water 97%
fresh water 1%
frozen 2%
Explanation:
In which phase of a substance do its particles have the greatest average kinetic energy?
Answer:
Gas
Explanation:
Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
BRAINLIEST :)()()(
The particles in the gaseous phase of a substance have the greatest average kinetic energy.
What is the average kinetic energy?The average kinetic energy refers to the kinetic energy accompanied by the maximum number of molecules whereas total kinetic energy is the kinetic energy of the total number of moles of gas molecules.
The total kinetic energy of molecules in a gas is determined by using the following formula,
Total Kinetic Energy = (3/2)nRT
Where R is the gas constant, n is the number of moles of gas, and T is the temperature of the reaction.
At any given temperature, all of the molecules of a sample do not have the same kinetic energy. Instead of that, the particles show a wide range of kinetic energies.
The average kinetic energy of the particles in the solid phase is the least and the particles or molecules in the gaseous phase have the greatest average kinetic energy.
Learn more about average kinetic energy, here:
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the distance from the top of one sound wave to the top of the next sound wave is called a (n)
Answer:
The answer is wavelength
Explanation:
Explain what the Kb for aniline (C6H5NH2) tells you (Kb = 4.3 x 10-10).
Answer:
Explanation:
C₆H₅NH₂ + H₂O = C₆H₅NH₃⁺ + OH⁻
C₆H₅NH₃⁺ is also called anilinium ion . Thus we see that aniline reacts with water to form anilinium ion and forms OH⁻ ion . Due to it, it shows basic properties . The pH value of this aqueous solution is more than 7 . But it is a weak base because the concentration of OH⁻ formed is very less . It is so due to its less value of Kb . It has been explained as follows
Kb = [tex]\frac{[C_6H_5NH_3^+][OH^-]}{[C_6H_5NH_2][H_2O]}[/tex]
Since Kb is 4.3 x 10⁻¹⁰ which is very low value so concentration of OH⁻ that is [OH⁻] formed will also be very low . Hence it will be a weak base.
What happens to many synthetic elements after they are made
Answer:
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I need an answer ASAP!!
Answer:
C:
Explanation:
Current flows from negative to positive.So the electrons will be moving left.
when a current is applied, positive charged copper ions (called cations) leave the anode (positive electrode) and move to the cathode (negative electrode).
The addition of heat causes the individual particles of a solid to
Answer:
Move rapidly or move fast and farther apart. Hope this helps.
Answer: vibrate more rapidly
Explanation:
Which situation describes why a rock sinks in water?
A. Air pressure is greater than the buoyant force.
B. The force of gravity is greater than the buoyant force.
c. The buoyant force is greater than the force of gravity.
D. The rock is less dense than water.
Answer:
b
Explanation:
Is amylopectin a straight chain polysaccharide
Answer:
hey friend, Amylopectin is a branched chain.
Adding concentrated
sulfuric acid to sugar
What reaction is this?
Answer:
Dehydration of Sugar
Explanation:
How much would this compound weight
Answer:98g/mol
Explanation:
Which of the following would produce the most ions when dissolved in water?
sodium chloride
mangesium chloride
aluminum oxide
sugar
Answer:
Aluminum oxide
Explanation:
The solubility of each of the species is shown below;
Sodium chloride: NaCl(s) ------> Na^+(aq) + Cl^-(aq)
Magnesium chloride: MgCl2(s)-----> Mg^2+(aq) + 2Cl^-(aq)
Aluminum Oxide: Al2O3(s) ------> 2Al^3+(aq) + 3O^2-(aq)
Sugar: Not ionic in nature hence it doesn't produce any ions.
We can see that Al2O3 produces five ions in solution. This is the specie that produces the greatest number of ions among all the species listed among the options. Hence we can safely conclude that aluminum oxide is the specie that produces the greatest number of ions in solution among all the options listed in the question.
Answer:
solid ice, when heated, turning into liquid water
Explanation:
solid ice, when heated, turning into liquid water
Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of the universe would have been different if there had been no dark matter. In your answer, use the term structures.
Please answer this and ill mark you as brainliest
Answer:
Dark matter also called baronic matter is the matter that makes up 27% of the universe.
In 1933 it was determined as that mass that cannot be seen, that is, the non-visible mass of outer space.
Dark matter also plays a central role in the formation of structures and the evolution of galaxies and has measurable effects on the anisotropy of cosmic microwave background radiation. The composition of this matter is unknown today.
The dark matter component has considerably more mass than the "visible" component of the Universe.
Explanation:
There are certain researchers who say that the appearance of dark matter was before the appearance of the big bang.
A relevant fact of this matter is that dark matter exerts gravity, and that gravity affects the movements of objects.
Despite the fact that nothing is known about its origin, astronomers have amply demonstrated that dark matter plays a determining role in the formation of galaxies and galactic clusters, which could not maintain their cohesion without its existence, but many doubt that it is the remainder / remnant or product of a big bang.
A(n)
wave carries energy through matter
Answer:
Explanation:
ok but what is the question
Answer:
The answer to the question is Mechanical your're welcome!Brainliest please?
Choose the correct word to make an
appropriate hypothesis for this example.
If
is added to water, then the
boiling point of water increases because
solutions have
boiling points than pure liquids if
pressure remains unchanged.
Answer: salt , higher.
Explanation:
Doing it right now
Answer:
salt, higher
Explanation:
edge
An ideal gas, such as helium, is in a sealed container made of hard steel. If the container is heated, what would happen to the gas trapped inside the container?
Group of answer choices
The volume of the gas will decrease
The pressure of the gas will increase
The volume of the gas will increase
The pressure of the gas will decrease
Answer:
The correct answer is The pressure of the gas will increase
The volume of the gas will increase
Explanation:
Step 1: Data given
The gas in a container is heated, this means the temperature increases
Suppose we start with a temperature of 100 K and a pressure of 1 atm and a volume of 1L
Step 2:
V1/T1= V2/T2
⇒V1 = the initial volume = 1L
⇒T1 = the initial temperature = 100 K
⇒V2 = the new volume = TO BE DETERMINED
⇒T2 = the increased temperature = 200 K
1/100 = V2 / 200
V2 = 2 L
This means when the temperature increases, the volume will increase
P1/T1 = P2/T2
⇒P1 = the initial pressure = 1 atm
⇒T1 = the initial temperature = 100 K
⇒P2 = the new pressure = TO BE DETERMINED
⇒T2 = the increased temperature = 200 K
1/100 = P2 / 200
P2 = 2 atm
This means when the temperature increases, the pressure will increase
The correct answer is The pressure of the gas will increase
The volume of the gas will increase
one home is heated by burning wood in a fireplace, while another similar home is heated by burning oil. which method uses less fuel? why?
Answer:
Well?
Explanation:
Both would use the same.
Also I would use wood rarther than oil but your answer is:
Oil uses less fuel because wood burns at a more faster speed.
A curved piece of glass or other transparent material that is used to refract light is called a (an) _____.
A) mirror
B) lens
C) reflector
D) optical fiber
Answer:
Lens
A curved piece of glass or other transparent material that is used to refract light.
Explanation:
u got ig?
A curved piece of glass or other transparent material that is used to refract light is called a lens. The correct option is B).
What are lenses?A curved piece of transparent material, such as glass, that bends light is called a lens. A lens's shape and the object's position both affect the kind of image it produces.
The center of a concave lens is thinner than the edges. Bent glass is defined as glass that has been curved or bent into a convex or concave shape. The desired shape is created by gently heating the glass until it becomes pliable, then molding it into that shape.
Light is refracted through lenses. When a light beam enters a lens, it is refracted; then, when it leaves the lens, it is refracted once more.
Therefore, the correct option is the B) lens.
To learn more about the lens, refer to the link:
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Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular theory?
higher temperature → more kinetic energy → more space between particles – higher volume
higher temperature → less kinetic energy → less space between particles higher volume
o higher temperature → more kinetic energy → less space between particles → lower volume
higher temperature → less kinetic energy → more space between particles lower volume
Answer:
higher temperature → less kinetic energy → less space between particles higher volume
Explanation:
What is the similarity between speed and vilocity
A fox spots a rabbit in a field. The fox begins to chase the rabbit, and the rabbit runs away. Which statement best describes the rabbit's behavior in response to the stimulus of being chased?
Select one:
The rabbit's behavior is a response caused by an internal stimulus.
The rabbit's behavior is a tropism.
The rabbit's behavior is a fight-or-flight response.
The rabbit's behavior is a response caused by hunger.
Answer:
C. The rabbit's behavior is a fight-or-flight response
Explanation:
The rabbit has a fight or flight response which means that when there is danger, the rabbit will either fight it or run away. In this case it ran away
The response of the rabbit in response to the fox chasing has been the fight and flight response. Thus, option C is correct.
What is a stimulus?A stimulus can be given as the physical or the chemical messenger that mediates the formation of the functional change in the body. The reaction to the stimulus has been the spontaneous reaction that can form the sudden response forming reaction.
The fox chasing the rabbit has been mediating the formation of the stimulus. The chasing act as the stimulus to the rabbit forming the rabbit to create the response or reaction of running. The reaction that forms with the stimulus of fear and frightening has been the fight and flight response.
The stimulus that has been formed arouses the fear of getting caught and works as the fight and flight response. Thus, option C is correct.
Learn more about stimulus , here:
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5.UT
---Urut points)
Which of the following explains the process of radiation?
5.1
when heat gets transferred through electromagnetic waves that move through
space
5.1
when heat gets transferred through objects that are touching
5.1
when heat gets transferred through a liquid or a gas
O when the measurement of heat in the atmosphere goes down
Answer:
when heat gets transferred through electromagnetic waves that move through
space
Explanation:
Radiation refers to the movement of energy through space without a material medium of propagation.
Electromagnetic waves have the ability to travel through space without a material medium for propagation. For instance, the rays from the sun reach us on earth without any intervening medium. Heat from a furnace can affect an object some distance away from the furnace without an intervening medium.
These are all examples of radiation. Energy is propagated through space without the intervention of any material medium.
Using the diagram of the forces on an airplane, which arrow represents the force of gravity?
A) A
B) B
C) C
D) D
Answer:
Is there a diagram that you can post
Answer:
D
Explanation:
Usatestprep :)
60.0 g of NH Cl are dissolved in 100 grams of water at 60.0° C. This solution is
A
supersaturated
B
saturated
С
unsaturated
D
none of the above
Answer:
B) is the correct answer
measure the mass of a truckful of grain, use:
kiloliters
kilometers
grams
tons
Help
Answer:
tons
Explanation:
CORO
Name three ways that scientists can ensure their results
are reliable
Answer:
Reliability. When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and gets very similar results then those results are said to be reliable. Reliability is measured by a percentage – if you get exactly the same results every time then they are 100% reliable.
Explanation:
Sorry, I only got one way.
