false, the rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.
Some solids such as glass can be heated and cooled in order to shape them. These are?
A.) Crystalline
B.)Amorphous
Answer:
Amorphous
Explanation:
Some solids such as glass can be heated and cooled in order to shape them.
These are Amorphous.
Glass is amorphous solid (or psuedo solid or super cooled liquid)helpppppppppppppppppp
Answer:
whyyyy?what happened hmmmm hahahahahhajajaha
Oxit axit là nhưng oxit gì
Answer:
Là những oxit tác dụng với bazo để tạo ra muối và nước, phản ứng với nước tạo thành một axit.
Những oxit axit thường gặp: CO2, SO2, SO3, P2O5, Mn2O7.
what are those tiny bumps on our tongue?
Answer:
papillae
Explanation:
Answer:
parti Ng dila sguro! hecdsjsjves
How
does learning about organs help us understand
how organ systems work?
Answer: Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.
Explanation:
An atom of mercury contains 120 neutrons in its nucleus and
80 electrons around it. It contains protons in its nucleus
and its atomic number is
Answer:
Answer: Its atomic number is 2, so it has two protons in its nucleus. (I hope this helps!)
Why does a warm front usually bring a light and steady rain?
Warm front Forms when a moist, warm airmass slides up and over a cold air mass. As the warm airmass rises, it condenses into a broad area of clouds. A warmfront brings gentle rain or light snow, followedby warmer, milder weather.
Mark as brainlist pleasewhat is the amount of heat required to completely melt a 200?
According to scientific thought, what is a theory? O a a confirmed hypothesis O an unsubstantiated idea an interpretation supported by facts O a controversial guess
Answer:
- an interpretation supported by facts.
Explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.
answer for c plsssssss
Answer:
D has 18 electrons (since atomic number = protons = electrons)
[Ne]3s² 3p⁶ (spdf electron configuration)2, 8, 8 (basic electron configuration) ArgonE has 20 electrons
[Ar]4s² (spdf electron configuration)2, 8, 8, 2 (basic electron configuration)CalciumExplanation:
In spdf form, we are basically spreading out the total number of electrons over the different spdf orbitals. While doing this we have to remember that an s-orbital holds 2 electrons max, a p-orbital holds 6 electrons max, a d-orbital holds 10 electrons max, and an f-orbital holds 14 electrons max.
Based on energy levels, the orbitals are filled in the following order:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, and 7p
So for example Argon with 18 electrons would be filled in the following way:
1s², 2s², 2p⁶, 3s², 3p⁶.
This can be abbreviated using the configuration of the previous Noble gas for example [Ne] = 1s², 2s², 2p⁶
∴ we can express Argon as [Ne] 3s², 3p⁶.
(BRAINLIEST)
compounds that are used to reduce acidity of soil
Answer:
Pulverized Limestone
Explanation:
Hope it helps!!
What does a flat, horizontal line mean on a
DISTANCE-time graph?
Speeding up
Travelling at a constant speed
Not moving (motionless, stationary)
Answer:
Explanation:
A straight horizontal line on a speed-time graph means that speed is constant. It is not changing over time. A straight line does not mean that the object is not moving!
Combustion reactions take place between fuel and oxygen and produce carbon dioxide and water. Balance
the following combustion reaction.
This is a combustion reaction of an alkane with oxygen. It is exothermic (
Δ
H
<
0
), and can be balanced in normal methods for balancing chemical equations ie ensuring that the total number of atoms of each element is the same on both sides of the equation.
Why does silicone dioxide have a higher melting point than sodium chloride?
[tex]\color{Black}\huge{Answer} [/tex]
It has a very high melting point as the ionic bond is very strong between them. More force is required to break down. Silicon dioxide is a giant covalent structure. It also has the highest melting point because the covalent bonds between them is the strongest.How does Fluoroanimonic acid melt things?
Answer:s the temperature is increased, fluoroantimonic acid decomposes and generates hydrogen fluoride gas (hydrofluoric acid). ... 1 Fluoroantimonic acid has a H0 (Hammett acidity function) value of -31.3. Dissolves glass and many other materials and protonates nearly all organic compounds (such as everything in your body)
tall me is this what you looking for
which kind of change alters the shape of an object without changing what type of matter it isITS RIELLY SCIENCE
Answer:
Ice carving. It's still ice, it's not water, and it changes shape while not changing it's matter
Explanation:
What is the total number of atoms in this chemical formula?
C8H3 NaBr 12
Is the answer 12 24 25 18
Answer:
The total number of atoms in this chemical formula
C8H3 NaBr 12
8+3+1+12=24
viết các PTHH sau CuO + h20
Answer:
An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. In redox reaction the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
In the reaction : CuO+H
2
⟶Cu+H 2 O
n the reaction H2
is oxidized since it has lost electrons and Cu is reduced since it has gained electrons.
Explanation:
hope this helps
The word "tropical" means that the air mass is __________. *
A. warm
B. cold
C. lukewarm
D. stable
Clouds are named for 3 different attributes including shape, _____________ & precipitation. *
A. size
B. color
C. elevation
D. smell
Answer:
color is there right answer for this question please make me a brainliest and follow me please please please please
True or false: Atoms are mostly space. *
Answer:
false
Explanation:
Atoms make up everything and are made up of protons, neutrons, and electrons.
Hoped this helped!
You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. is it chemistry or physical change?
Answer:
Chemical because water + metal = rust.
Explanation:
A new substance was formed.
True or False: Polyatomic ions do not have a charge.
True or false: lonic compounds must have prefixes.
Answer:
first false
second false
Explain how CMB is observed on the Earth?
Answer:
the speed of light (all photons, naturally including those from the CMB, travel at the speed of light relative to you, regardless of frame or your velocity).
But I suspect you’ve asked this question because of a totally understandable but not quite correct set of assumptions about the universe. If my hunch is correct, you understand the CMB a bit like the skin of a balloon, gradually expanding over time. The Earth is a point somewhere in this balloon, and you’re asking about the Earth’s velocity relative to perhaps the center of this balloon. But that’s not quite how the universe works. It’s far more strange.
Our best hypothesis thus far is that the Big Bang happened from a single point. The “space” around us IS that single point. There is no origin point, since everywhere is by definition the origin point. You can see this for yourself by noticing that basically every star and galaxy we can see is - in the long run - moving away from us. And this is true regardless of whether you are on Earth or another star, or any point in the universe. So from this, it doesn’t really make sense to ask what the velocity of the earth is relative to the CMB rest frame, because space itself is expanding. Hopefully haven’t caused too many headaches!
Explanation:
True or false: There is space between molecules in a mixture
The statement "There is space between molecules in a mixture" is true.
What is a mixture?A mixture is made up of mixing two or more substances. These mixtures are not mixed chemically, but physically. Both homogeneous and heterogeneous mixtures are possible.
A combination of two or more unrelated substances that is not the result of the chemical fusion is referred to as a mixture. They could be gases, liquids, or solids. The component of a mixture can be easily separated.
A mixture might consist of ingredients in the same phase as one another or in distinct phases. A mixture is homogeneous if the constituent parts are mixed at the same period. A mixture is heterogeneous if it is made up of components that are in different phases.
Thus, the statement is true.
To learn more about mixture, refer to the link:
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Are two atoms of the same element identical?
Answer
Two atoms of the same chemical element are typically not identical. ... Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are differenter:
Explanation:
Is oxygen likely to gain or lose electrons when boding? Explain.
what phenomenon is the basis behind the ability to separate miscible liquids by distillation?
Answer:
The basis of the separation by steam distillation is that while the water and organic condensed phases are immiscible, the vapors of both are miscible. Once condensed, the two separate again allowing for an easy separation. As noted above, both liquids and solids can be distilled by steam.
Explanation:
I hope this helps!
What kind of reaction is NaHCO3 = Na2O + H2O + CO2
Answer:
NaHCO3 = Na2O + H2O + CO2 is a decomposition reaction.
Balanced Equation : 2NaHCO3 → Na2O + H2O + 2CO2
convert 2 butanol to 2 nitrobutane
The conversion of 2 - butanol to 2 - nitrobutane involves conversion of 2 butanol to 2 - bromobutane and subsequently to 2 - nitrobutane.
In order to convert 2 - butanol to 2 - nitrobutane, an SN2 reaction is first carried out in which 2 - butanol is converted to 2 - bromobutane. This reaction proceeds with inversion of configuration at the chiral carbon as expected.
This product is subsequently reacted with silver nitrite in ethanol to yield 2 - nitrobutane along side silver bromide. Some alkyl nitrite is also produced as a by product. The components of the mixture are separated by fractional distillation. The scheme of the reaction is shown in the image attached to this answer. This reaction is only applied to primary and secondary alkyl halides.
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