Answer:
Light waves come in a continuous variety of sizes, frequencies and energies, a continuum known as the electromagnetic spectrum. Once Maxwell introduced the concept of electromagnetic waves, everything clicked into place.
Explanation:
Hope this helps:)
~Kisame'sAbs
Sometimes people have to cry out all their tears, to make room for a heart full of smiles.
True. I am always sad but my heart is always happy cuz it knows there are good things ahead
what is the bonding of hydrogen?
Answer:
A hydrogen bond is a primarily electrostatic force of attraction between a hydrogen atom which is covalently bound to a more electronegative atom or group, and another electronegative atom bearing a lone pair of electrons..
(refer the image)
Explanation:
brainliest plz
Why do both nuclear and chemical
changes occur?
Answer:
The change in energy for a chemical reaction has to do with the potential energy of the electrons. The change in energy for a nuclear reaction has to do with the potential energy of the nucleus. The change in energy for a nuclear change is many orders of magnitude larger than for a chemical change.
The statement that describes both nuclear and chemical changes occur is "potential energy."
What is nuclear and chemical reaction?Nuclear reactions include a change in the nucleus of an atom, which usually results in the production of a different element. Chemical reactions, on the other hand, require just electron rearrangement and no changes in nuclei.
A nuclear reaction is any reaction that causes the nucleus of an atom to change. An atom's nucleus is made up of protons and neutrons. It seems to reason that a nuclear reaction alters the amount of protons and/or neutrons in an atom.
Chemical changes occur when bonds between molecules or atoms are broken and/or formed to form a new material. In this case, the new substances' qualities differ from the old, the particles differ, and the number of particles can alter.
The change in energy for a nuclear change is many orders of magnitude greater than the change in energy for a chemical change.
Learn more about nuclear and chemical change here
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eg
How many Mg atoms are there in 0.764 moles of Mg?
atoms
Answer:
1.135986935e+39
Answer:
[tex]\boxed {\boxed {\sf 4.60 \times 10^{23} \ atoms \ Mg}}[/tex]
Explanation:
We are asked to find how many atoms of magnesium are in 0.764 moles of magnesium.
We convert moles to atoms using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of magnesium. So, there are 6.022 × 10²³ atoms of magnesium in 1 mole of magnesium.
Convert using dimensional analysis and set up a conversion factor using Avogadro's Number.
[tex]\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 \ mol \ Mg}[/tex]
We are converting 0.764 moles of magnesium to atoms, so we multiply by this value.
[tex]0.764 \ mol \ Mg *\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 \ mol \ Mg}[/tex]
The units of moles of magnesium cancel.
[tex]0.764 *\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 }[/tex]
[tex]0.764 *6.022 \times 10^{23} \ atoms \ Mg[/tex]
[tex]4.600808 \times 10^{23} \ atoms \ Mg[/tex]
The original value of moles (0.764) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 0 in the thousandth place tells us to leave the 0 in the hundredth place.
[tex]4.60 \times 10^{23} \ atoms \ Mg[/tex]
0.764 moles of magnesium contains approximately 4.60 × 10²³ atoms of magnesium.
What is equivalent to 750 joules
Answer:
0.179254 kilocalories
Explanation:
divide the energy value by 4184
[tex]0.179254[/tex] that would be your answer
Rank from most ionic to least ionic
a. WO3
b. MnS
c. MnS2
d. ZnS
e. ZrS2
The order of increasing ionic property is;
WO3 < ZrS2 < MnS2< ZnS < MnS
Ionic compounds are compounds that contain an ion pair. Typically, ionic compounds are formed between metals and nonmetals.
The degree of ionic character depends on the type of metal involved and the magnitude of charge it carries.
Typically, first row transition metals form ionic compounds. The degree of ionic character depends on the row in which the metal is found and the magnitude of charge it carries.
Hence, the order of ionic character of the compounds from most ionic to least Ionic is; WO3 < ZrS2 < MnS2< ZnS < MnS.
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I'll mark you the brainiest if you answer this question first!!!
Read the CDC's recommendations for frequency of handwashing. Do you agree with these recommendations? Explain your answer using the results from the experiment as evidence.
Link down below:
https://www.cdc.gov/handwashing/when-how-handwashing.html
Answer:
Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.
Explanation:
Hope this help
Can anyone tell me why I got this question wrong? I have no clue.
Answer:
what queastiion
Explanation:
Answer:
what is the question
Explanation:
...
All of the following affect toxicity of a substance except*
origin of the substance
nature of exposure
duration
dosage
Answer:
durage
Explanation:
durage just doesn't make sense compared to the other 3
Answer:
Origin of the substance
Explanation:
Origin of a substance doesnt affect toxicity but all other options do
What happens to excess heat produced in the muscle during contraction and relaxation
Answer:
Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.
Explanation:
Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.
33) 1 e = ........С
O 1.6*10^-27
O * 1.6 *10^-19
O 1.66 * 10^-19
o 1.66* 10^-27
Answer
0.16574
Explanation:
because why not
Explain how Dri-FIT material works using the properties of water.
Answer:
El sistema Dry-Fit funciona transportando la humedad a la superficie de la prenda, facilitando su evaporación. Comúnmente se utilizan materiales como el poliéster o microfibras de materiales sintéticos, ya que no absorben líquidos.
Explanation:
espero que te sirva
State at least three different properties of metallic compounds?
Answer:
Very High melting and boiling points.
Very Good Conductors of heat and electricity.
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Explanation:
Answer:
Very High melting and boiling points
Very Good Conductors of heat and electricity
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Metallic luster (shiny)
Sometimes magnetic
Explanation:
How do you prepare a demi-glace?
Answer:
Explanation:
sory i dont know
High tides are located at__
A an B
B an D
B an C
Answer:
b and c since they bulge
Explanation:
Compost from vegetable peelings can be used as plant fertilizer. * a. reduce b. resuse c. recycle d. recover
Answer:
Is letter B
Explanation:
Hope it helps :))
What does the phrase “breaking in” mean as it is used in the passage?
A.
In the first instance, it means "to make something come apart," and in the second instance, it means "to stop doing something."
B.
In the first instance, it means "to enter without permission," and in the second instance, it means "to make softer through use."
C.
In the first instance, it means "to stop doing something," and in the second instance, it means "to make something come apart."
D.
In the first instance, it means "to make softer through use," and in the second instance, it means "to enter without permission."
Answer:
D
Explanation:
It means entry by force.
Question 4 of 5
A specific oxygen atom has 8 protons and 10 neutrons. If this is a neutral
atom, how many electrons does the atom have?
A. 8
B. 6
C. 4
D. 9
SUBMIT
Answer:
A. 8
Explanation:
For this to be a neutral atom there has to be the same amount of protons and neutrons.
brainliest please. . .
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Answer:
C is the correct option.
Explanation:
When water reaches 100°C it starts evaporating and the molecules of water turns to vapor.
What physical and chemical properties would an antique dealer use to determine the substance that makes up a
piece of jewelry?
Answer:
Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties. Properties that describe how a substance changes identity to produce a new substance are chemical properties. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.
What happens when the two atoms get even closer?
Answer:
If two atoms get close together then the electrons of each atom will get attracted to the other one and bc one atom lose electrons gets a positive charge and the one with more electrones will get a negetive charge
Explanation:
brailiest pls pls pls
Write a balanced chemical equation based on the following description:
the reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor
Answer:
C3H8(g) + 5O2(g) = 3CO2(g) + 4H2O(g)
Explanation:
What elements are in H2F5BLi and how many atoms are in each element.
20 point plus brainliest
Answer:
2 hydrogen
5 fluorine
1 boron
1 lithium
Ribosome factory part or worker
which of the following is not true for chemical change
Answer:
"They can be reversed by physical changes."
Explanation:
A chemical change can form a new substance, can be detected by the change in color and they have properties different from their starting materials.
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Answer:
1)
Explanation:
ok this is a write answer
The temperature at which a solid melts is the same as the temperature at which its liquid form solidifies (true or false)
Answer:
True I think so
Explanation:
I have asked question in my profile please tell me the answer
why is calcuim (ca) in group 2. period 4 on the periodic table
Answer:
Calcium (Ca) is in group 2 and period 4 on the periodic table be because Calcium has 2 valence electrons and 4 electron shell. Thus, calcium is a metal like all other group 2 element.
Explanation:
Determine the amount of grams present in
3.25x1024 atoms of Lithium.
Answer:
Explanation:
Molar mass of Lithium is 6.9410 g/mol.
This means 1 mol of Li atoms weigh 6.9410 g
In 1 mol 6.022 x 10 ^ 23 atoms should be present
So, in 6.9410g , there should be 6.022 x 10 ^ 23 atoms.
So weight of 1 atom = a = 6.9410 g / (6.022 x 10^ 23)
To find weight of 3.25 x 10 ^ 24 atoms we have to multiply a by 3.25 x 10^ 24
So you will get the answer as
[6.9410 g / (6.022 x 10^ 23)] x 3.25 x 10^ 24
= 37.46 g
Name the following compound and tell what type of compound it is: Protons 6, Neutrons 8, and electrons 6
Answer:
Carbon-14
Explanation:
It's carbon, because the element has 6 proton.
It's not an ion, because there are same number of proton and electron 6=6
It is carbon-14 because 6 proton + 8 neutron = 14