Answer:
When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed. When heat (energy) goes into a substance one of two things can happen:
Explanation:
If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. ... If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas (Figure 1). Avogadro's law.
As the temperature of a gas decreases, the amount of kinetic energy also decreases .
How does decrease in temperature affect the amount of kinetic energy?If the temperature is increased, the average speed and kinetic energy of the gas molecules increase.
If the temperature of gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases.
The temperature of a gas decreases and hence , results in the amount of kinetic energy also decreases .
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If particles have enough kinetic energy to partly overcome
the force of attraction between them, matter exists as a
Answer:
Liquid
Explanation:
How will the beam of light interact with the piece of wood?
Answer:
When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat. The light wave could be reflected by the object. And the light wave
Explanation:
Is a Cork Cell unicellular or multicultural?
The cork cells are the dead cells and they are present periphery of roots and stems of matured plants. Here a Cork Cell is multicultural.
What are the terms unicellular and multicellular?The organisms which is made up of a single cell is defined as the unicellular organisms whereas the organisms with numerous cells are called multicellular organisms. The bacteria is a unicellular organism and humans are multicellular.
In unicellular organisms a single cell carry the whole functions whereas in multicellular organisms multiple cells perform many functions. The body organization of unicellular organism are simple whereas the multicellular organisms have complex body organization.
Here cork cells are multicellular. A protective coat of a tree seen in outer region is called cork. It prevents water loss through bark. A cork is composed of multiple thick layers.
Thus cork cell is a multicellular cell.
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A pencil has density of 0.875 g/cm^3. It has a volume of 4.0 cm^3. What is the mass?
Answer:
3.5g
Explanation:
[tex]Density=\frac{mass}{volume}\\ Mass= Density X Volume\\Mass = 0.875 X 4.0\\Therefore, Mass = 3.5 g[/tex]
Answer:
3.703703703703
Explanation:
How is the kinetic energy of the particles that make up a substance different after it changes state?
Answer:
the answers are either a or d
Explanation:
why is a bird not considerd a autotroph?
Answer:
An Autotroph is an animal which can make its own food eg: plants make their own food. But birds hunt and search for their food they do not make it by themselves. Hence birds are not considered Autotrophs, instead they are considered to be Heterotrophs (animals which do not make their own food)
Explanation:
RES
Which of these data come from reliable sources? Check all that apply
the scientific name of an organism listed in an encyclopedia
O a list of medical statistics written in a magazine advertisement
solar activity data reported by NASA on its website
the behavior of a species described in a science fiction novel
the behavior of a species described in a professional journal
Answer: A, C, E
Explanation:
Got it right
Answer:
A, C, E
Explanation:
Thank the guy above me <3
In the wave-mechanical model of the atom, an orbital is defined as
1.
a region of the most probable proton location
2.
a region of the most probable electron location
3.
a circular path traveled by a proton around the nucleus
4.
a circular path traveled by an electron around the nucleu
Answer:
I think its 2
acrostic poem for matter
Answer:
M-Molecules are always moving
A-Anything that has mass and volume
T-Temperature determines how fast the molecules are moving
T-The states of matter are gas,liquid, and plasma
E-Evaporation makes a liquid turn to gas
R-Racing molecules make the space between the molucles increase
Explanation:
MATTER
URGENT !! Help fast this is due at 8:30 am.
Distinguish between the different types of Mixtures. And explain your answer
Answer:
a. solid- liquid mixture: Mixture that involves a solid and liquid substance.
b. solid- solid mixture: Mixture that involves two solid substances.
c. solid-gas mixture: Mixture that involves both a solid and gas substance.
d. liquid-liquid mixture: Mixture that involves two liquids.
e. liquid - gas mixture; Mixture of a liquid and a gas.
f. gas-gas mixture: Mixture of gases.
Explanation: Hope this helps.
Which of the following has mechanical energy? (5 points)
Car battery
Compressed spring
Glowing incandescent lightbulb
Nucleus of uranium atom
Answer:
It is B
Explanation:
Express the following in liters at STP:
6.62 x 10-3 moles HF
Answer:
The volume of 6.62×10⁻³moles of HF at STP is 148.38×10⁻³ L
Explanation:
Given data:
Number of moles of HF = 6.62×10⁻³ mol
Volume of HF in litter at STP = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Standard temperature = 273 K
Standard pressure = 1 atm
Now we will put the values in formula.
1 atm × V = 6.62×10⁻³mol ×0.0821 atm.L/ mol.K × 273 K
V = 6.62×10⁻³mol ×0.0821 atm.L/ mol.K × 273 K / 1 atm
V = 148.38×10⁻³ L
Thus, the volume of 6.62×10⁻³moles of HF at STP is 148.38×10⁻³ L.
Convert 0.822 decigrams (Dg) to Milligrams (Mg)
it is 82.2
Explanation:
i just know
is density a chemical or physical property of a substance?
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
I hope this helps you understand! <3
Elements in the same family have similar properties because the have the same number of elecrtons in the __________ energy level.
Answer:
I believe it is the valence energy level.
ASAP MULTIPLE CHOICE
What did Robert Millikan discover?
the nucleus of the atom
the mass of an electron
the charge-to-mass ratio of the electron
the charge of a neutron
Answer:
Robert Millikan discovered the elementary charge of an electron.
C
Which two characteristics do all flowering plants have in common?
O A. They produce seeds.
O B. They produce cones.
C. They have vessels.
O D. They lack roots.
Answer: They have vessels, and produce seeds.
Explanation: Flowering plants have vascular tissue and use seeds to reproduce.
Answer: It is A and C
A P E X
Explanation:
I hope this help
What is the atomic number of an atom?
a.) the number of neutrons
b.) the number protons and neutrons
c.) the number of protons
d.) the number of electrons and neutrons
Answer:
the number of protons
Explanation:
i took the the test
0.089 in scientific notation
Answer: 8.9 * 10^2
and that is all
How do you test color?
Answer:
red
Explanation:
rojo yyyyy888888iiiiii
Describe how the energy of a shear wave relates to the direction of particle motion.
Answer: Energy of a shear wave relates to the direction of a particle motion is downwards.
Explanation:
Answer:
Describe how the energy of a shear wave relates to the direction of particle motion.
Explanation:
Which characteristic of a substance is considered a chemical property?
Answer:
reactivity (readiness to produce new substances)
Answer:
i don't know you have to give me the other possible answer choices so i can answer and help you out.
Explanation:
how hot it lava!!!
bill nye: volcano
Answer: bill nye is a og.
When Oxygen in the air reacts with Iron, Iron Oxide forms.
Which of the following statements is correct?
A. Group of answer choices
B. This is a chemical change.
C.This is a physical change.
D. Oxygen and iron have similar properties.
E. Iron and iron oxide have the same properties.
Answer:
I think its E. iron and iron oxide have the same properties if it's not e its d for sure
Explanation:
iron + oxygen → iron oxide. 4 Fe + 3 O2 → 2 Fe2O.
identify the following substance
Answer:
its a mixture not sure but hope I helped
What atom has 35 protons and 47 neutrons ?
Answer:
Bromine
Explanation:
Answer:
Bromine??
I think bromine is the answer but i may be wrong
Oxygen with a -2 charge has...
A) gained 2 protons
B)gained 2 electrons
C)Lost 2 electrons
D)Lost 2 protons
Answer:
B. Gained 2 electrons
Explanation:
is adding tomato sauce to pasta a chemical or physical change
Answer:
the answer is physical change
Answer: A chemical reaction is taking place here as well.
Jose’s lab partner gives him a solution of sodium phosphate that is buffered to a ph 4. Because of an error that he made while calibrating the ph meter, Jose’s measurements of the ph of the sodium phosphate solution are 5.4,5.4, and 5.4
Which statement best describes his results
A they are accurate but not precise
B they are precise but not accurate
C they are both precise and accurate
D they are neither precise or accurate
Answer:
B. They are precise but not accurate.
Explanation:
I got it right on edge 2020
Answer:
b
Explanation:
7. Two samples of gold must have the same
Two samples of gold must have the same density as they have the same kind of atoms.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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