Answers
[tex]\huge\boxed{Sublimation}[/tex]
_____________________________________Sublimation:Sublimation is a process in which the solid molecules gain energy from their surrounding and they now have enough energy to overcome the force of attraction with the neighboring molecules, thus they escape into the surrounding without going through the liquid phase, that means they directly jump to the vapor phase.
_____________________________________EndothermicThose process which absorb energy from their surrounding to form the product are called endothermic process. Since the SUBLIMATION requires additional energy, it is an endothermic change.
_____________________________________Best Regards,'Borz'Related Questions
Hydrogen bond is not formed by 1) oxygen 2) nitrogen 3) chlorine
PLEASE HELP!!!
Answers
Answer:
Input work is the work done on a machine as the input force acts through the input distance. This is in contrast to output work which is a force that is applied by the body or system to something else. Output work is the work done by a machine as the output force acts through the output distance.Jan 15, 2020 bahsgsh bvshgs d hg
I LEARNED THAT PLANT INDICATOR CAN
Answers
How many atoms are there in one mole of CH3OH
Answers
Answer: 1.44 x 10^25 atoms in 128 grams of CH3OH.
Explanation: To obtain number of atoms, multiply number of moles by the number of molecules per mole.
Explanation:
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The image shows particles of salt dissolved in water.
How will the arrangement of salt particles most likely change?
Salt particles will move toward the left through diffusion.
Salt particles will move toward the left through active transport.
Salt particles will move toward the right through diffusion.
Salt particles will move toward the right through active transport.
Answers
Answer:
Salt particles will diffuse and towards where it is less that is left !!
so your answer is A !! left through diffusion !!
Explanation:
Answer:
Salt particles will move toward the left through diffusion
Explanation:
I just took the quiz.
If 150 G of wood started Burning, and 30 G of wood ash was left behind, how many grams of CO2 to gas was released
Answers
Answer:
120G
Explanation:
From the combustion process, about 120G of carbon dioxide would be released into the atmosphere.
For the chemical reaction to obey the law of conservation of matter, if only ash and carbon dioxide are the product, then the sum of the mass of the product and that of the reactants must be the same.
In a chemical reaction, matter is not created nor destroyed, but they are simply changed from one form to another.
Mass of wood burning = mass of ash + mass of CO₂
150G = 30G + mass of CO₂
mass of CO₂ = 150G - 30G = 120G
The most abundant element in the universe
(1) Hydrogen
(2) Oxygen
(3) Nitrogen
(4) Helium
Answers
Answer:
Hydrogen
Explanation:
Hydrogen is universe's most simple element, which is most likely why it is the most abundant.
What volume in liters of chlorine gas would be fully required to react to 125 g of Nal
Answers
Volume of Cl₂ = 9.34 L
Further explanationReaction
2NaI + Cl₂ ⇒ 2NaCl + I₂
mol NaI (MW=149,89 g/mol) :
[tex]\tt \dfrac{125}{149,89}=0.834[/tex]
mol Cl₂ : mol NaI = 1 : 2
mol Cl₂ :
[tex]\tt \dfrac{1}{2}\times 0.834=0.417[/tex]
Assumptions at STP(1 mol=22.4 L) :
[tex]\tt 0.417\times 22.4~L=9.34~L[/tex]
When naming acids the prefix hydro- is used when the name of the acid anion ends in___
Answers
Answer:
hydrochloric acid
Explanation:
These anions usually have the ending “-ide.” As acids, these compounds are named starting with the prefix “hydro-,” then adding the first syllable of the anion, then the suffix “-ic.” For example, HCl, which is hydrogen and chlorine, is called hydrochloric acid. More complex acids have oxygen in the compound.
What product(s) are formed during this chemical reaction? (There will be two correct answers)
Ca + Na3PO3 rightwards arrow
CaNaPO3
Ca3(PO4)2
Ca2(PO4)3
Ca(PO3)2
Na
Na3
CaNa
No Reaction
Answers
Answer:
Ca3(PO4)2 and Na
Explanation:
The reaction equation is;
3Ca + 2Na3PO3 -------> Ca3(PO3)2 + 6Na
We must remember that calcium is above sodium in the electrochemical series. This implies that calcium can displace sodium from its solution. Calcium has a reduction potential of -2.87 V while sodium has a reduction potential of -2.71 V. The ion with the more negative reduction potential can easily displace the other in aqueous solution.
This explains why the reaction above is possible.
What do ionic bonds contain?
Answers
Answer:
Valence Electrons
Explanation:
Answer:
Ionic bonds contain electrovalent bond
Explanation:
Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.
why is an atom regarded as electrically unstable
Answers
Answer: An atom can be considered unstable in one of two ways. If it picks up or loses an electron, it becomes electrically charged and highly reactive. Such electrically charged atoms are known as ions. Instability can also occur in the nucleus when the number of protons and neutrons is unbalanced.
Explanation:
how many sig figs are in 1.008 and 120.9??
Answers
Answer:
there are 4 sig figs in 120.9 and there are 4 sig figs in 1.008
Explanation:
10. Balance with coefficients.
Zn + H3PO4 > Zn3(PO4)2+H2
Answers
Answer: Zinc + Phosphoric Acid = Zinc Phosphate + Dihydrogen
Explanation:
if we all have atoms and atoms technically never touch then we've never touched anything in our lives. is this true?
Answers
Answer:
We are all made out of atoms, yes this is true. And atoms never touch each other. So no sir, i did not punch that little boy.
Explanation:
When water evaporates, ...
kinetic energy decreases.
thermal energy is released.
heat energy is absorbed
Potential energy decreases
Answers
im not sure for this one please help me
Answers
Answer:
Fairly certain it is the tension of the string
Answer:It would be C
HELPPPPPPPPPP! I WILL GIVE FREE BRAINLIST!
Answers
Answer:
21%
Explanation:
nitrogen takes up more than half so it can't be the 2 biggest answers cause both are more than 50 and the smallest answer would have to be for the little sliver of the pie chart
Answer: 21%
Explanation:
Which of the following is a scientific question?
O A. Who made the first plant-hardiness zone map?
O B. Which plants are sold by my local nursery?
O c. Which kind of flowers should I plant in my garden?
O D. How does gravity affect the growth of plant roots?
Answers
Hope this helps!! (:
Mrs. Franklin loves teaching science and thinks about it all the time. While walking one day, she steps on a warm, fresh piece of used gum. The gum flattens and sticks to her shoe. When she lifts her foot, she sees long strings of gum between her shoe and the sidewalk. She thinks, "What a great demonstration of the properties of metals!"
What properties of metals would Mrs. Franklin most likely teach about with this demonstration?
conductivity and luster
ductility and malleability
malleability and reactivity
conductivity and ductility
Answers
Answer:
Ductility and Malleability
Explanation:
Pls mark my answer as brainliest
Answer:
the correct answer is Ductility and Malleability....(B)....
Explanation:
I took the test, hope this helps. also the person above me is correct
Is the following picture an example of a chemical change or a physical change?
SOMEONE PLEASE HELP ILL GIVE brainly
A physical change, because the atoms are rearranging to form new molecules.
A physical change, because the molecules are staying the same.
A chemical change, because the atoms are rearranging to form new molecules.
A chemical change, because the molecules are staying the same.
Answers
Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). If the bubbles were caused by the decomposition of a molecule into a gas (such as H2O →H2 and O2), then boiling would be a chemical change
Therefore, your answer would be:
A physical change, because the molecules are staying the same.
Answer:
A physical change because the molec are staying the same
Explanation:
when water is evaporated it still is water just not in liquid form
A beaker filled with 100 ml of water has an initial temperature of 23 degrees Celsius. After the beaker has been heated, the final temperature is 100 degrees celsius. The final volume of the water is 85.32 ml. After reaching the final temperature, there are bubbles throughout the water. What is this an example of?
Answers
Answer: The temperature of a beaker of water is 318.2 K.
Explanation:
Multiplying the temperature in Celsius by tells us how many Fahrenheit degrees above the freezing .
why burning of wood and cutting it into small pieces are considered as two different types
of changes.in sort type
.
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Answers
Answer:
burning causes pollution cutting results furniture
Explanation:
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Answer:
burning of wood, new substances are formed and hence it is a chemical change. While cutting the wood into small pieces no new substance is formed, thus it is a physical change. Hence, burning of wood and cutting it into small pieces are considered as two different types of changes.
Write TRUE if the statement is correct and FALSE if the statement is wrong.
___1.Heat depends only on how fast molecules vibrate. ___2.Joule is a unit of heat energy
___3.We measure temperature with a thermometer
___4.The faster molecules vibrate; the more heat they give off.
___5.Temperature measures the average kinetic energy per molecule.
Answers
Answer:
true is the answer of first
Write the net ionic equation for the following reaction:
AgC2H3O2(aq) + CaCl2(aq) →
Answers
Answer:
2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)
Explanation:
The net ionic equation reflects the main reaction that occurred in the system. It tells you the most important reaction that took place.
If we first put down the balanced molecular equation for the reaction, we have;
CaCl2(aq) + 2 AgC2H3O2(aq) ---------> 2 AgCl(s) + Ca(C2H3O2)2 (aq)
The net ionic equation is;
2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)
Rust forms when iron metal reacts with oxygen gas. Which chemical reaction best
supports the law of conservation of mass?
A. Fe + O2 --> Fe2O3
B. 2Fe + O2 --> 2Fe2O3
C. 3Fe + 202 --> Fe2O3
D. 4Fe + 302 --> 2Fe2O3
Answers
Answer:
D. 4Fe + 302 --> 2Fe2O3
Explanation:
The equation that bests supports the law of conservation of mass is the choice D;
4Fe + 3O₂ → 2Fe₂O₃
Based on the law of conservation of mass, the number of atoms on both sides of the expression must be the same. Only the fourth choice proves this law;
4Fe + 3O₂ → 2Fe₂O₃
Number of atoms
Elements Left hand side Right hand side
Fe 4 4
O 6 6
We can see that both side of the expression have the same number of atoms and the equation is balanced.
describe the theory of plate tectonics
Answers
Answer:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
Explanation:
From Google
Considering the passage about crude oil, why is distillation the main process for separating the contents of crude oil? Crude oil is a homogeneous mixture. Crude oil is a heterogeneous mixture A major byproduct of crude oil is gasoline.
Answers
Answer:
Crude oil is a homogeneous mixture.
Explanation:
I got it right.
Answer: Crude oil is a homogeneous mixture.
Explanation: im doin edge
The speed of a mechanical wave through a medium depends on the type of medium. It also depends on the type of mechanical wave. Which statement is true?
Answers
The statements are;
A) All waves travel at the same speed if no medium is present.
B) Electromagnetic waves require a medium, but mechanical waves do not.
C) All waves travel at the same speed through any medium.
D) Mechanical waves require a medium, but electromagnetic waves do not.
Answer:
Statement D is true.
Mechanical waves require a medium, but electromagnetic waves do not.
Explanation:
The two types of waves are;
Mechanical waves and Electromagnetic waves.
Mechanical waves require a medium, such as an atmosphere or water, to enable it transport its energy. For example sound waves occur when you clap and thereby distort the air around.
Whereas, Electromagnetic waves do not require a medium to enable it transport its energy. A good example would be light. Normally, Electromagnetic waves are usually formed when the electric field and the magnetic field are perpendicular to each other.
So electromagnetic waves can transmit without a medium because electric and magnetic fields can exist independently without a medium.
What are the elements in sodium phosphate?
Answers
Answer:
sodium and phosphorus
Explanation:
sodium combines with phosphorus to produce sodium phosphate
Explanation:
I hope understand this
Whats Potassium bond type? Please help!
Answers
Answer:
A metallic bond.
Explanation:
Potassium is a metal (alkali metal), hence its bonds are metallic bonds.
Hope this helped!
Answer:
metallic bond............