the answer is A: Potential energy is the energy of objects at rest; kinetic
energy is the energy of objects in motion.
Answer:
A
Explanation:
The energy levels of an atom are occupied by
A.electrons
B.protons
C.neutrons
D.ions
Answer:
A: electrons
Explanation:
las diferencias fundamentales del entramado urbano antes y despues de 1750
Answer:?
?Explanation:
An ice cube and a scoop of table salt are left outside on a warm sunny day. explain why the ice cube melts and the salt does not.
The melting point of ice is 0 degrees Celcius, which means it exists as a liquid for any temperatures above 0 degrees. The melting point of salt is approximately 800 degrees Celcius, which is way greater than the melting point of ice. This means that for temperatures below 800 degrees, salt exists as a solid.
The temperature of the area where they were placed we can assume was somewhere between 0 and 800 degrees, greater than the melting point of ice but less than the melting point of salt. This why the ice melted but the salt did not.
I hope this helps!
how many moles of aluminum are needed to produce 2.8 moles of aluminum chloride
Answer:
1.4 mol
Explanation:
that my i got i was doing for it
name as many tv shows as you can!!!
if u name more than 10 you get brainilest!!
Answer:
Vampire diaries Freinds Twilight My little pony Thats it
Explanation:
Answer:
spongebob square pants
family guy
american dad
the cleveland show
teen titans go
robot chicken
the loud house
the Cassandras
the big bang theory
steven universe
Explanation:
How many moles are in 4.78 * 10 ^ 24 molecules of hydrogen peroxide, H2O2
Answer:
7.94 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.78 \times {10}^{24} }{6.02 \times {10}^{23} } \\ =7.940199...[/tex]
We have the final answer as
7.94 molesHope this helps you
What happens when balanced forces act on an object at rest?
Answer:
Balanced forces do not cause a change in motion.
The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.
Explanation:
Answer:
The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.
Explanation: MARK MOST BRAINLIEST PLEASE
When you dissolve an antacid tablet in water and it produces bubbles, what kind of change is this?
A. a physical change
B. a chemical change
C. a solution change
Answer: B. a chemical change
Explanation:
Which of the following molecules have the weakest attraction to each other?
F2
Cl2
Br2
Answer:
Explanation:
F2 have the weakest attraction to each other because of higher electronegativity when they are brought close to each other they repel each other
State three uses of oxidation number
Answer:
Explanation:
1. To identify what's been oxidised and what's been reduced in a redox reaction
2. In naming compounds
3. To work out reacting proportions in titration reactions
a covalent compound that shares two pairs of electrons.
What is it?
is facilitated diffusion passive or active transport?
Answer:
Its passive
Explanation:
Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins.
What happens to the radiant energy comes from the sun to the earth
Answer: Once the sun's energy reaches earth, it is intercepted first by the atmosphere. A small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. Some of the sun's energy is reflected back to space by clouds and the earth's surface.
A 22 g sample of water is heated until it reaches a temperature of 73 °C. This sample
is placed in a calorimeter that contains 23 mL of H20 at 41 °C (use dH20 = 1.0 g/mL).
If the Cs of water is 4.18 J/g°C what is the final temperature of the water? (assume
that all the heat of the hot water goes into heating up the cold water until the two are
at thermal equilibrium and no heat is lost to the environment)
Answer:
56.64°c
Explanation:
its obtained from facts that heat gained by water=heat lost by calorimeter
which of the folllowing
Answer:
I think its cadmium pliz mark brainliest if helpful
Sodium hydroxide solution was added to dilute hydrochloric acid. The pH of the solution in the flask was measured at intervals until no further change of pH took place. What would be the pH change in this reaction?
Answer:
The pH change will be neutral. I.e pH of 7.
Explanation:
The pH change will be neutral because reaction between hydrochloric acid and sodium hydroxide will result in the formation of sodium chloride salt and water. Sodium chloride salt and water is neutral because reaction between strong acid(pH is acidic) and strong base( pH is basic) will produce neutral salt with pH of 7. This salt does not hydrolyze.
PLEASE!!!
1.-All of the following are phases (states)
of matter EXCEPT:
A.- solid
B.- liquid
C.- gas
D.-putty
2.-Water is different from other substances because:
A.- It is more dense as a solid than a liquid B.- It is less dense as a solid than liquid
C.- it is more dense as a gas than a liquid
D.- It is less dense as a solid than a gas
3.-This matter has a fixed shape and
volume with particles closely packed together with little movement. It is a:
A.- liquid
B.-solid
C.- gas
D.- plasma
4.-Matter changing from a solid to a liquid is called:
A .-evaporation
B.- sublimation
C .-deposition
D.- melting
5.-The melting point of water is:
A.- 0°C
B .-100°C
C.- 32°C
D.- 60°C
6.-Water is different from other substances because:
A.- It is more dense as a solid than a liquid
B.- It is less dense as a solid than liquid
C.- it is more dense as a gas than a liquid
D.- It is less dense as a solid than a gas
7.-Which of the following substances has
a higher melting point than water?
A.- salt
B.- sugar
C.- flour
D.- all of the above
8.-Which of the following is NOT a way that matter changes phase?
A.- melting
B.- freezing
C.- evaporation
D.- mixing
9.-Matter changing from a solid to a gas is called:
A.- evaporation
B .-sublimation
C.- deposition
D.- melting
Phases of Matter - Vocabulary Quiz
10-15: Name the six ways the phase (state) of matter changes:
10. _____________________
11.______________________
12.______________________
13.______________________
14.______________________
16.______________________
Review Important Points about Phases of Matter
16) What is matter? _____________________________________________________________________________________ 17) Name the three phases (states) of matter? _____________________________________________________________________________________
18) Identify and describe the particle in each phase of matter and how they are different in each phase of matter.
i think the first one is B Second once is D and thord is B
In our system mainly four states of matter are present and they are solid, liquid, gas and plasma. In melting solid changes into liquid and in sublimation solid changes into gas.
What are states?States are those phases which gives idea about the arrangement of constituent particles in it and also states the physical properties.
Main states of matter that are exist are solid, liquid, gas and plasma.Density of water is less in the solid state a compared to the liquid state, that's why ice is always present above the liquid.Solid state has a perfect shape, orientation and arrangement of atoms within it.Melting is a process in which solid state changes into liquid state.Melting point of water is 0°C.Meling point of flour is higher among salt and sugar and it is equal to approx 220 degree celsius.Sublimation is a process in which solid changes into gaseous state for example, sublimation of camphor.Melting of ice, freezing of water, burning of camphor, melting of wax and formation of precipitates are the example of changes of states of matter.Hence all points are discussed above.
To know more about state of matter, visit the below link:
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Kelly is walking on the beach when she finds interesting right she picks it up exam is it in wonder what type of rock it is and how the rock is formed what type of Rocky Kelly fine and how can you tell and describe how this type of rock is formed
Answer:
She found a Sedimentary rock.
Explanation:
Rocks found on beaches are Sedimentary. (The upcoming and this sentence is pre-written and copy and pasted in every brainly question or comment I write or answer.) If this answer helped you please consider giving it brainliest. If my answer was wrong and you got marked wrong for it, I deeply apologize and hope you will forgive me, since everyone makes mistakes sometimes. If you need me to elaborate on my answer or give further explanation on it, please ask and I will do so. If you need to explain your reasoning on your work feel free to use my words- word for word- without crediting me, the answer was made for you anyways! Hope yall learn from my answer and it helps you in the future with assignments, quizzes, test’s, and more!
- •Trix•
( Yes I know my - •Trix• thingy is not my user but it’s what I would change it to if I could but I can't, please address me as Trix while commenting or talking to me here.)
Which of the following descriptions would not be considered a chemical property of the substance?
A: iron rusts when exposed to oxygen
B: sodium is easily oxidized by other elements
C: limestone is corroded by acid rain
D: sugar dissolves when placed in water.
A structure that carries a single unit of hereditary information is a what
Answer: chromosomes is the answer hope this helps
Explanation:
during conduction heat is transferred by the movement of currents within a fluid true or false
Answer:
True i think
Explanation:
Answer:
Yes
Explanation:
Water is an example because heat touches the bottom of the sea without being nullified
1. Which scenario best describes Newton's 1st law?
Answer:
option B . because acording to Newton 1st law until or unless you donot apply force the object will not move or stops.
Explanation:
I WILL MARK BRAINLIEST ANSWER!
Which statement describes heterogeneous mixtures?
1. They are made up of two or more Pure substances that are not chemically bonded together and appear non-uniform
2. The substances they are composed of can only be separated chemically
3. The substances they are composed of have fixed ratio between their components
4. They are made up of two or more pure substances that are chemically bonded together appear uniform
Answer:
1. They are made up of two or more Pure substances that are not chemically bonded together and appear non-uniform
Explanation:
edge2020 :)
Heterogenous mixtures are made up of two or more substances that are not chemically bounded together and which appear non-uniform.
What are heterogenous mixtures?Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.
Learn more about heterogenous mixtures,here:
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3. If x electrons are needed to displace 108 g silver from a solution which contains Ag+ ions how many electrons are needed to displace 9g of aluminium from solution which contains Al3+
What is the percent yield of a reaction?
a.the difference between measured and calculated amounts
b.the amount of product obtained / amount possible x100
c. The amount of product actually obtained in a reaction
d. The amount of product that is possible from a reaction
Answer:
B
Explanation:
A P E X
The amount of product obtained / amount possible x100. Hence, option B is correct.
What is the per cent yield of a reaction?To express the efficiency of a reaction, calculate the per cent yield using this formula:
%yield = (actual yield/theoretical yield) x 100.
A per cent yield of 90% means the reaction was 90% efficient, and 10% of the materials were failed and not in use.
Hence, option B is correct.
Learn more about the per cent yield of a reaction here:
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PLEASE HELP
In the equation 2KCIO3 → 2KC1 + 302, how many moles of oxygen are produced when 3.0 mol of KCIO3 decompose completely?
Moles of Oxygen produced : 4.5 moles
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
The reaction coefficient shows the mole ratio of the reactants and products
Reaction
2KCIO₃ → 2KCl + 30₂
moles of KCIO₃ = 3
From equation, mol ratio of KCIO₃ : O₂ = 2 : 3, so mol O₂ :
[tex]\tt mol~O_2=\dfrac{3}{2}\times 3=4.5[/tex]
What metal forms an ionic compound with nitrogen with the general formula X3N?
Answer:
B. Lithium (Li)
Explanation:
Lithium forms an ionic compound with nitrogen with the general formula X₃N. When lithium and nitrogen react, they form a nitride called lithium nitride.
The Lithium nitride is actually prepared by the direct combination of elemental lithium with nitrogen gas. Below is the reaction equation:
6Li + N₂ → 2Li₃N
The reaction can occur when a solution of lithium in liquid sodium metal is treated with N₂. When the Lithium nitride reacts with water, it does that violently and produces ammonia.
Which of the following statements is NOT true about Olympus Mons?
It is 3 times as high as Mount Everest.
O Its base is about the same size as Arizona.
It is the largest mountain in the solar system.
It have never erupted.
Answer:
The largest of the volcanoes in the Tharsis Montes region, as well as all known volcanoes in the solar system, is Olympus Mons. Olympus Mons is a shield volcano 624 km (374 mi) in diameter (approximately the same size as the state of Arizona), 25 km (16 mi) high, and is rimmed by a 6 km (4 mi) high scarp.
Explanation:
This is actually fun. First comment is brainliest.
Answer:
sup, how ya doin?
Explanation:
Is the following sentence true or false?
Warm water cools the air above it
Answer: It dependes
Explanation: which kind of warm water? Hot or normal warm? Because if hot then yes (true) if normal warm then no (false) if it is hot water then the steam coming from it makes the air above it warm. If it is normal warm then there is not enough ( I should say hotness? I don’t know any other way to say it) to make steam to make the air above it hot.
