Definitely, a physical change.
What are chemical and physical changes?A chemical change is a type of change involving the chemical composition of substances. The chemical composition changes completely and lost its old identity.
Chemical changes are unlike physical changes. The latter involves changes to the physical characteristics of substances. The changes do not get to the chemical level.
Thus, chemical changes are ordinarily not reversible but physical changes can be reversed.
When branches are thrown into a wood chipper and mulch is created, a physical change has taken place because the branches can still be recovered from the mulch.
A mulch is just a material layer placed on soils to conserve moisture.
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schroedinger thought that electrons
Answer:
In Niels Bohr's theory of the atom, electrons absorb and emit radiation of fixed wavelengths when jumping between fixed orbits around a nucleus. The theory provided a good description of the spectrum created by the hydrogen atom, but needed to be developed to suit more complicated atoms and molecules.
Explanation:
A boat sails into a bay and drops anchor. Several hours later, it is surrounded by mud. What
happened?
Answer:
the flow of the water pushed the mud around the anchor
Explanation:
The information regarding the mud should be explained below:
The following information should be considered:
In the case when it should be surronded by mud so there is low tide arise.it is occur at the time when the water retreats to its lowest level, moving away from the shore.Learn more: https://brainly.com/question/5763151?referrer=searchResults
which of the following statements is true?
A. A technology society has no impact on the environment.
B. A technology society has a completely positive impact on the environment.
C. A technology society has both a positive and negative impact on the environment
D. A technology society a completely negative impact on the environment.
Please select the best answer from the choices provided
Answer:
C. A technology society has both a positive and negative impact on the environment
Explanation:
We are using up earth's resources but bettering social society!
Have a nice day,
PumpkinSpice1♥
If an element is on the 4th row of the periodic table...how many energy levels/rings would you need to draw a Bohr 's model of the element's atom?
Answer:
4 energy levels/rings
Explanation:
By the atomic model proposed by Niels Bohr, the electrons orbit around the nucleus in shells having different energy level each with the ability to contain a given maximum amount of electrons.
The closest shell to the nucleus named the K shell, can have a maximum of two electrons, the next shell known as the L shell can have 8 electrons while the next shell, M, can have a maximum of 18 electrons
The arrangement of the periodic table is based on the number and location of electrons such that elements in the 4th row (period 4 elements) have three completed energy levels/rings before, their valence ring making the total number of rings = 4 energy levels/rings.
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6. Classify each compound as ionic or molecular based on its properties.
Substance Melting Point Solubility Conductivity Classification
1 -55 oC poor poor
2 396 oC good good
3 0 oC not tested poor
4 200 oC good good
5 20 oC good poor
Answer:
1. c
2. ionic
3. c
4. ionic
5. alloy or ionic
Explanation:
The compound classification.
The compounds are classified as per several different criteria and one common elements is the specific element that is present this makes it an iconic or a molecular. The presence of the oxides, hydrides, and various atomic groups.
Hence the answer is melting point to conductivity classified as c, iconic, c, iconic, and alloy.
A poor conductor of electricity will have a conductivity classification of c. The 396 good conductors will be iconic and a 0 C not teste will have a conductivity of c. The 200 C of good conductor will be iconic and 20 C of good conductor will be alloy or iconic.Learn more about each compound as.
brainly.com/question/3110085.
Which is the role of the gall bladder? PLEASE HURRY I WILL MARK YOU BRAINLYEST
A:to provide physical digestion
B:to stored the liquid produce by the liver
C: to make the liquid that is stored in the liver
D: to decrease the chemical digestion
Answer:
The gallbladder is a pear-shaped, hollow structure located under the liver and on the right side of the abdomen. Its primary function is to store and concentrate bile, a yellow-brown digestive enzyme produced by the liver. The gallbladder is part of the biliary tract
Answer:
a.............................
When moving across a row in the Periodic Table, which of the following increases?
A wooden block has a mass of 562 g and a volume of 72 cm3. What is the density rounded to the nearest tenth!
Answer:
The answer is 7.81 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{562}{72} \\ = 7.80555555...[/tex]
We have the final answer as
7.81 g/cm³Hope this helps you
Answer:
r
Explanation:
Be sure to use two (2) sources of information (one source can be your book). In your response, you MUST state your source. Your response should be between 100 and 150 words.
Answer:
^=E9>*t
Explanation:
Will mark Brainliest!!! PLEASE HELP
Hi.
Please i need help with these questions.
Please show workings.
Answer:
see the pict for the answers
Explain how blocks of the periodic table are related to the electron configuration of an element.
Answer:
that is simple
electronic configuration s,p,d,f
we know that it's represented element
thus block also represented by s,p,d,f
same
Explanation:
that how it's are related are in the periodic table .
Answer:
Explanation:
The electronic configuration of an element is related to its position on the periodic table.
The links are:
the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in
the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in
the number of electrons in all shells of an element is represented in the periodic table as the element's atomic numbe
i need help with chem ????????
Answer:
69
Explanation:
When light waves hit ice, most of them bounce off and radiate back into space. Because of this, ice is best described as which kind of surface? reflective absorbent dense rough
The bouncing back of light waves observed when light waves hit ice and most of them bounce off and radiate back into space is called reflection.
What are light waves?Light waves are a form of waves which produces visible sensitization of the eyes
Light waves have properties of waves such as:
reflection refraction diffractioninterference, etc.When light waves hit ice, most of them bounce off and radiate back into space.
This property of light waves is known as reflection.
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When light waves hit ice, most of them bounce off and radiate back into space, hence, ice is best described as a reflective surface.
What is a Reflective surface?A reflective surface is one which can cause incident light to bounce back (reflection).
According to this question, when light waves hit ice, most of them bounce off and radiate back into space. This means that most of the incident light reflects off the ice surface.
Therefore, the ice surface is best described as a reflective surface.
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products or solutions found at home or in store and their characteristics
Answer:
bruh, just go in your bathroom and look for cleaning products
Explanation:
13
0121
This question is about sodium and chlorine.
FIGURE 2 shows the positions of sodium and
chlorine in the periodic table.
FIGURE 2
CI
Na
02
State ONE difference and ONE similarity in t
electronic structure of sodium and of chlori
[2 marks]
The question is asking you to compare each elements electrons, specifically valence since it mentioned their placement on the table.
Similarly: they both are only one electron away from stability (a full octet)
Difference: Sodium will want to loose the one electron, and Chlorine will take it.
Listening is a more complex process than hearing.
Arent listening and hearing and listening the same thing.
what would happen to a gummy bear after soaking for 2 days in distilled water
Answer:
it would expand
Explanation:
the gummy bear would absorb alot of water
Answer:If a gummy bear is soaked in distilled (pure) water for 24 hours, then the gummy bear will increase in size
Explanation:
What can you make with molecules
Answer:
water
Explanation:
Answer:
Explanation: Las moléculas se encuentran fuertemente enlazadas con la finalidad de formar materia. Las moléculas están formadas por átomos unidos por medio de enlaces químicos.
What is the name for the compound BrCl?
Compound name:
Bromine chloride
Bond type:
Covalent Bond
Reasoning for Bond type:
Formed between nonmetal and nonmetal atoms
Br (Bromine) is a nonmetal. Also, known as a liquid.
Cl (Chlorine) is a nonmetal. Also, know as a gas.
Use this website for more element information:
https://ptable.com/#Properties
A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?
–3
–2
0
+3
Answer:
-3
Explanation:
Given parameters:
Number of protons = 7
Number of neutrons = 8
Number of electrons = 1 0
Unknown:
Overall charge on the nitride ion = ?
Solution:
The overall charge on an specie can be determined by;
Charge = number of protons - number of electrons
Charge = 7 - 10
Charge = -3
A nitride ion has 7 protons, 8 neutrons, and 10 electrons. –3 is the overall charge on this ion. Therefore, the correct option is option A.
What is ionic charge?
Ionic force An ion's electrical charge is produced when a number of electrons from a single atom or set of atoms are gained (creating a negative charge) or lost (creating a positive charge). Mineral bonding strength is significantly influenced by ionic charge (for instance, Fe3+ forms a stronger link than Fe2+ with identical ions).
Which elements inside a crystal lattice can be substituted for one another. Electrostatically applied opposite charges provide the ionic connection between ions. MgO is the final form of magnesium oxide. A nitride ion has 7 protons, 8 neutrons, and 10 electrons. –3 is the overall charge on this ion.
Charge = number of protons - number of electrons
Charge = 7 - 10
Charge = -3
Therefore, the correct option is option A.
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When Earth is tilted on its axis why does it orbit the sun ?
Answer:
Here
Explanation:
Some assume our planet's changing distance from the sun causes the change in the seasons. That's logical, but not the case for Earth. Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun
Pls help me I don’t understand it’s for my science class.
Plz check if correct and tell me wether each is element or compound
Answer:
gold - element
nickel- element
How many joules are released when 30.0 g of H2O(g) condenses at 100°C and cools to 10°C
Heat released : 79086 J
Further explanationCondenses :
1. phase change (gas - liquid) : heat of vaporization (ΔH vap for water = 2260 J/g)
2. cools from 100 - 10 : (Q=m.cΔT)
1. Q=m.ΔH vap
[tex]\tt Q=30\times 2260=67800~J[/tex]
2. Q=mc.ΔT(c water = 4.18 J/g C)
[tex]\tt Q=30\times 4.18\times (100-10)\\\\Q=11286~J[/tex]
Q tot = 67800 + 11286 = 79086 J
Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?
Answer:
chemical
Explanation:
Salt changes the chemical makeup of the water and allows it to get colder than what it would normally freeze at.
The table below lists the properties of a metallic element.
shiny, silver colored, forms +1 and +2 ions, compound with sulfur is bright red.
Where on the periodic table would this element most likely be found?
Group 1
Group 2
Group 12
Group 13
Answer:
Group 12
Explanation:
Answer:
I got all answers correct on my test and got 100%, this question was in the test which got correct
so your answer is group 12
Explanation:
What is the mass of 1.34x10^24molecules of Iron? *
Answer:
Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane
Explanation:
Given the following equation:
2KMnO4 → K2MnO4 + MnO2 + O2
How many grams of KMnO4 are required to produce
1.60 grams of O2?
g
Mass of KMnO4 required : 31.607 g
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A 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
Reaction
2KMnO₄ → K₂MnO₄ + MnO₂ + O₂
mol of O₂ :
[tex]\tt \dfrac{1.6}{16}=0.1[/tex]
mol ratio KMnO₄ : O₂ = 2 : 1
mol of KMnO₄ :
[tex]\tt \dfrac{2}{1}\times 0.1=0.2[/tex]
mass of KMnO₄ :
MW KMnO₄ : 158,034 g/mol
[tex]\tt mass=0.2\times 158,034 =31.607~g[/tex]
Which solution has the greatest number of hydroxide ions?
i need a friend....
Answer:
homogeneous solutions