Answers
Answer:
3. One example of condensation is dew forming on grass or leaves early in the morning when the air is cooled/cooling.
4. This is called freezing. For example, when water turns into ice (a solid) because it freezes.
5. This is called melting. The butter reached its melting point and turned into a liquid.
6. Adding or removing energy causes changes in states of matter. Temperature for example can cause melting and freezing.
7. Water which collects as droplets on a cold surface when humid air is in contact with it.
8. Evaporation/vaporization
9. before- particles are compact
during- particles vibrate
after- the particles move freely
10. condensation because it is going from gas into a liquid
11. Evaporation, I know because when liquid gets heated after a period of time and it reaches its boiling point, it will begin evaporating.
12. When a solid is heated the particles gain energy and start to vibrate faster and faster. ... Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid. The particles in the liquid are the same as in the solid but they have more energy.
13. Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase.
14. freezing because particles are becoming compact and getting slower because of decrease in temperature
15. Examples are mothballs, dry ice, snow in the winter months, freeze-drying (ice crystals in a frozen food bag), air fresheners, and printers that print out high-resolution images.
16. Try and think of it in terms of the molecules. The temperature is such that the molecules are all bound together into a solid. Occasionally a surface molecule picks up enough energy to break it bond,.. a statistical probability ,and drifts away. The overall temperature of the solid is reduced by that event,as temperature is just an average of the energy. A little more heat flows into the material ,from the ambient environment, and another molecule escapes, and so the process continues….. if the concentration of the molecules in the vapour space above the solid, is low the reverse process of molecules condensing onto the surface,and releasing energy back into the solid is low.
Explanation:
sorry it took a little bit, it wouldnt let me copy and paste what i had typed /:
Related Questions
how is iodine 131 different from a normal atom of iodine?
Answers
Answer:
Iodine 131 is an unstable/radioactive isotope of iodine and a normal atom of iodine is stable.
Explanation:
If a football is 625 mL volume and 0.64 g/mL density what is the mass
Answers
explanation
the formula for density is density equals mass divided by volume so you plug in .64 for the density and 625 for the volume. .64= m/625. to solve for mass you would multiply both sides by 625 to get the mass
Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .
Pleasee help I’ll mark you as brainlister
Fill in the blank
Answers
Answer:
the answer is 2 valence electrons
Which of the following statements regarding the moon and Earth is correct? Question 9 options: A) The moon is older than Earth by approximately 300 million years. B) Earth is tidally locked, while the moon spins on its axis. C) Earth and the moon have nearly the same mass. D) Earth and the moon are nearly the same age.
Answers
The statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).
When did the Moon form?The Moon formation refers to the geological period of time in which our natural satellite emerged as an independent celestial body.
It has been proposed that the Moon emerged first compared to the Earth (approximately 300 million years).
In conclusion, the statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).
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How much does a sample of C6H12O6 weigh if it contains 1.7 x 10^28 hydrogen atoms?
Answers
Answer:
Explanation:
Glucose has 6 number of carbon atoms, 12 atoms of oxygen and 6 atoms of oxygen
The total number of glucose atom is 24 atoms
The atom of hydrogen is twice that of carbon
that is (6.02 x10^22) x2=1.204 x10^23atoms
the number of moles of hydrogen is solved as follows
1mole = 6.02x10^23 atoms what about 1.204 x10^23=
{(1.204x10^23)/(6.02 x10^23)}=0.2moles
The moles of glucose
1 atom of glucose= 6.02 x10^22 x4 =2.408 x10^23 atoms
moles= { (2.48 x10^23)/(6.02 x10^23)}=0.41moles
Hope this helped :)
help :(
If 4.7 moles of oxygen gas are allowed to react with 3.9 moles of iron according to the following equation:
4 Fe + 3 O2 → 2 Fe2O
How many moles of Fe2O3 can be formed?
Answers
Moles of Fe₂O₃ formed : 1.95
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.
[tex]\tt 4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]
We find the limiting reactant from the ratio of the mole and the reaction coefficient
Fe ⇒ 3.9 : 4 = 0.975
O ⇒ 4.7 : 3 = 1.56
Because the ratio of Fe is smaller, then Fe becomes the limiting reactant
Reaction
4Fe + 3O₂ ⇒ 2Fe₂O₃
mol Fe₂O₃ from mol of Fe as limiting reactant
mol ratio Fe₂O₃ : Fe = 2 : 4, then mol Fe₂O₃ :
[tex]\tt =\dfrac{2}{4}\times 3.9=\boxed{\bold{1.95}}[/tex]
PLEASE HELP WILL GIVE BRAINLIEST
Answers
please answer its due in 10 minutes teacher just assigned it 5 minutes ago
Answers
Answer:
please upload a clearer picture
Answer:
1 Rain falling down
2)Freezing 3)Melting 4)Adding or removing energy from matter causes a physical change as matter moves from ome place to the other5)5heWhich contribution is a modification to Thomson's plum pudding model?
Atoms are indivisible.
Electrons are scattered in an atom.
A positively charged nucleus sits at the center of an atom.
Atoms of the same element have the same properties.
Answers
Answer:
Option C: A positively charged nucleus sits at the center of an atom.
Explanation:
Thompson’s plum pudding model was a model proposed by Thompson to show that an atom consisted of more than one fundamental unit.
In Thompson's model, he suggested that the atom consisted of a cloud of positive charges which were surrounded by electrons which are negative charges distributed throughout.
Now, Thompson's experiment was later rejected by Ernest Rutherford when he carried out the gold foil experiment and came to the conclusion where he proposed a model that the atom consisted of mainly empty space and that all its positive charge are concentrated at its center and further surrounded by a cloud of electrons.
From the given options, the correct one is Option C.
Answer: Option C: A positively charged nucleus sits at the center of an atom.
Explanation:
what is the orbital notation for silver?
Answers
Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10
Explanation:
I think
Helium gas (He) is an element and not a compound. Why is this true?
Answers
Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar
Answers
Answer:Condensation
Explanation:
it
Answer:
convection
Explanation:
I took test I got 100%
The formula for density (D) is D = m/v, where m is mass and v is volume. What is the mass in grams (g) of a 45.0 cubic centimeters (cm³) block of silicon if the density of silicon is 2.336 grams per cubic centimeters (g/cm³)
A. the mass is 0.0519 g.
B. the mass is 19.3 g.
C. the mass is 45.0 g.
D. the mass is 105 g.
Answers
Answer:
The answer is D. The mass is 105g.
A force is always a push. true or false ?
Answers
A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.
Experimental Group:
Control Group:
Answers
And the control group is the ducks in room temperature water
What do these two changes have in common?
using a large magnet to remove pieces of iron from a junkyard
rain forming in a cloud
Select all that apply.
Both are caused by heating.
Both are only physical changes.
Both conserve mass.
Both are chemical changes.
Answers
Answer: Both are only physical changes.
Explanation:
Both are only physical changes.
• The material, which takes part in the change is structurally similar after and before the change is known as the physical change.
• The cloud formation is a physical change as when evaporation of water takes place it goes into the air and produces cloud by the process of condensation. The same water goes back to earth by the process of precipitation and this get repeated again and again.
• A chemical change takes place when formation of new substance takes place by combining two substances. In the case, when a magnet picks up iron in a junkyard, one is still having an iron and a magnet, no formation of substance is taking place. So it is a physical change.
Thus, both the given processes are examples of only physical changes.
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What did you find out from this investigation? Be thoughtful in your answer.
Answers
If you go to the moon your mass would ___.
stay the same
increase
Answers
Answer:
stay the same
Explanation:
you would weigh less if u stood on a scale but you're still the same mass unless you chopped of a body part or something
what are the spectrum lines, and they're color emmited and nanometers
Answers
Emission lines are seen as coloured lines on a black background. Absorption lines are seen as black lines on a coloured background. The presence of spectral lines is explained by quantum mechanics in terms of the energy levels of atoms, ions and molecules.
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when is an object in free fall
Answers
Answer:
a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.
write down the similarities and differences of Continental and temperature climatic zones
Answers
Answer:
Temperate climates, otherwise known as meso-thermal climates, are cooler than subtropical climates, but warmer than polar climates. A continental moderate climate is another sub-type of temperate climates. These regions have hot, rainy summers and cold, dry winters.
Explanation:
PLEASE I NEED HELP ASAP.
Answers
Al = 13 protons, 10 electrons, 14 neutrons
S = 16 protons, 18 electrons, 17 neutrons
P = 15 protons, 18 electrons, 19 neutrons
Hope this helped!
Fill in the blank to the Periodic Pun
Oh, I ate too much! Now I’m going to _________________ the rest of the night.
Answers
Answer:
stay up?...or shxt the rest of the night
Answer:
Answer C
Explanation:
what are 2 physical changes in the carbon cycle?
Answers
Answer:
Today, the carbon cycle is changing. humans are moving more carbon into the atmosphere from other part of the earth system. more carbon is moving to the atmosphere where fossil fuels, like coal and oil, are burned.more carbon is moving to the atmosphere as you may get rid of forest by burning the tree
Explanation:
hope this give you a hint
What does it mean for an element to be oxidized?
A. The element is a spectator ion in a chemical reaction.
B. The element has gained one or more electrons in a reaction.
C. The element has lost one or more electrons in a reaction.
D. The element has bonded to another element with opposite charge
Answers
Answer:
B
Explanation:
Oxidation occurs when an atom molecule or ion loses one or more electrons in a chemical reaction when oxidation occurs the oxidation state of the chemical species increases oxidation doesn't necessarily involve oxygen originally the term was used when oxygen caused electron loss in a reaction hope this helped. :)
An element is oxidized when It has loses one or more electrons in a chemical reaction. Therefore, Option (C) is correct.
What is Oxidation ?The loss of electrons, gain of oxygen or loss of hydrogen will be considered as Oxidation.
The gain of electrons, loss of oxygen or gain or hydrogen will be considered as the Reduction.
Rusting is one of the popular example of oxidation.
Therefore, An element is said to be oxidized when It has lost one or more electrons in a reaction.
Hence , Option (C) is correct.
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When bonding, what is most likely to happen between the atoms listed below?
A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X
Answers
Answer:
atom x will accept electrons from atom y
Explanation:
in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x
this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.
animals need to consume other organisms for energy. how would you categorize them based on that information?
Answers
Answer:
They would be carnivores.
Explanation:
What is the term used to describe a change in motion?
Answers
Answer:
it should be momentum if im not mistaken
235/92 U + 1/0 n -> 138/55 Cs + 96/37 Rb + 2 1/0 n
what kind of reaction?
Answers
Answer:
Nuclear fission
Explanation:
This reaction is called a nuclear fission reaction. In this reaction, a radioactive decay process occurs in which a heavy nucleus spontaneously disintegrates into two lighter nuclei and several neutrons, with the release of a large amount of energy.
The imbalance between the number of neutrons and protons is responsible for this spontaneous disintegration. Until a stable daughter cell forms, the reaction proceeds.The Periodic Table of elements is arranged by:
O atomic mass
O number of neutrons
O number of electrons
O atomic number
Answers
Answer:
atomic number
Explanation:
Answer:
number of electrons and number of neutrons