Answer:
Argon is a chemical element with the symbol Ar and atomic number 18.
Explanation:
Answer:
Avogadro's number is a very important relationshiptoremember: 1 mole = 6.022×1023 6.022 × 1023atoms, molecules, protons, etc.
...
Explanation:
jayfeather friend me
Problem 3
How many grams are in 0.8 moles of H202
Answer:
27,21 g
Explanation:
molair mass of H2O2 = 34,0147 g/mol
0,8 mol x 34,0147 g/mol = 27,21 g
True or false most oils tend to dissolve best in nonpolar solvent
Answer:
true
Explanation:
water is polar, and oil and water do not mix. nonpolar solvents do not like or mix with water, so they do not dissolve in water. so it's true.
Precautions to take during electroplating
Answer:
Always be scared of electroplating. ...
Follow all electrical safety precautions. ...
Use all safety Precautions. ...
Use that Fume Hood. ...
It's a chemistry lab, set it up like one. ...
Always add acid to water. ...
Don't overheat your solutions! ...
Don't mix acid and cyanide solutions.
Does the size of the solute (sugar) affect the rate of dissolving?
Answer:
Yes
Explanation:
The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.
Brainliest?
1.
What is the light that you can see called?
VED
DANCE
WOW
EN
M
W
NOGO
OLET
a) observatory light
c) visible light
b) ultraviolet light
d) infrared light
Answer:
The correct answer is c. Your welcome
Cells have a ______ ___________, a thin layer that controls what goes in and out of the cell.
Answer:
cell membrane
Explanation:
✨✨What’s 2 similarities and 2 differences between the Earths layers and the atmospheric layers? ✨✨
‼️DONT COPY OFF LINE PLEASE ‼️
Answer:
Differences: Earth's atmosphere has 5 main layers where as atmospheric layers thins out in each higher layer.
Similarities: They both have multiple layers.
Explanation:
Sorry I only have 1 difference and similarity.
What type of cell in the human body grows but does not undergo mitosis?
Answer:Skeletal muscle can undergo hypertrophy, as each cell gets bigger.
Explanation:
Answer:
Sperm cells and egg cells don't go through mitosis.
Explanation:
which of the following is the best description of an elment
A. A substance that cannot be broken down into simpler substance
B. A small particle made with a specific chemical composition
C. A naturally occurring mineral made of more than one substances
D. A collection of atoms that have different abilities when joined together
Answer:
d
Explanation:
atoms join together to produce elements
Answer:
An element is a substance whose atoms all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions.
Explanation:
hello
look at pic and answer
Answer:
Situation 7, also thats funny you were playing nurses office. I like that song. Hope this helped!
How many grams are in 1.30 x 10^24 formula units of Ca(NO3)2?
A. 151 g
B. 354 g
C. 294 g
D. 416 g
Answer:
354 gram
Explanation:
No of formula units = no of moles × Avogadro's number
Number of moles = no of formula units/ Avogadro's number
No of moles = 1.30×10^24/60.02×10^23
No of moles = 2.159 moles
Mo of moles = mass in gram/ molar mass
Mass in gram = no of moles× molar mass
Mass in gram =2.159×164
Mass in gram = 354.15 gram
The grams that are present in [tex]1.30 * 10^{24}[/tex] formula units of [tex]Ca(NO_3)_2[/tex] is 354 gram that can be calculated using number of moles.
(B) 354 g
One mole:A mole is defined as [tex]6.02214076 * 10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others.
No. of formula units = no of moles × Avogadro's number
Number of moles = no of formula units/ Avogadro's number
No. of moles = [tex]1.30*10^{24}/6.022*10^{23}[/tex]
No. of moles = 2.159 moles
The Number of moles is defined as the given mass over molar mass.
No. of moles = Mass / Molar mass
Mass = no. of moles× molar mass
Mass =2.159×164
Mass = 354.15 gram
Thus, option B is correct.
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brainly.com/question/1358482
is Jupiter's volume more than 1,000 times that of Earth
Answer:
cómo lo ahí no sé amigo blue the rous
Answer:
yes it is i did it on ixl
Someone help it’s due today
Answer:
All elements are neutral
Explanation:
The plum pudding model of the atom indicated that all elements are neutral. The model was proposed by J.J Thomson after he conducted his experiment on the gas discharge tube.
From the experiment he discovered electrons which he called cathode rays.
Therefore, he suggested the plum pudding model of the atom.
The model describes negatively charge sphere surrounded by positive charges to balance them.
1. Solid fossil fuel formed from _____________ remains. Produces energy when _____________.
PLZ I NEEEEEEEDDDDDD HELP
Answer:
2h+02=h20
Explanation:
2 in front of h on left side
2 in front of h on right side
Answer:
Explanation:
1. __1___ Fe + __1___ S → __1___ FeS. 2. __1___ H2 + __1___ Cl2 → __2___ HCl. 3. __2___ Mg + __1___ O2 → __2___ MgO. 4. __1___ O2 + __2___ H2
_N2 + _H2 = _NH3
Will there be any leftover reactants left?
(Kinda urgent)
Answer:
This reaction is the synthesis of Ammonia using Nitrogen and Hydrogen gas.
N+H→NH3
We must remember that Nitrogen and Hydrogen are both diatomic molecules in their standard gas form. This adjusts the equation to
N2+H2→NH3
Now we need to adjust coefficients in order to balance the atoms on each side of the equation. Currently, we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.
We can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.
N2+3H2→2NH3
This gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.
Explanation:
I hope this was helpful.
SMARTERTEACHER
Answer:
Balance the equation N2 + H2 ⇒ NH3
Balancing chemical equations is usually easier than it looks
There are 2 Nitrogens and 2 Hydrogens on the left side
There are 1 Nitrogen and 3 Hydrogens on the right side
Hydrogen seems to be the more complicated term so we should start with that
_N2 + _H2 ⇒ _NH3
With 2 H on one side and 3 on the other, our common multiple is 6
To balance the H we need to multiply H2 by 3 and NH3 by 2
_N2 + 3H2 ⇒ 2NH3
Now that we have H balanced, we need to look at N
There are 2 Nitrogens on both sides of the equation, so in this case, it is done
Which choice is a biotic factor of an ecosystem?
A. sun
B. ants
C. air
D. soil
True or False- Waves are caused by the water being pushed by the wind, which transfers energy, that can cause erosion to the shorelines .
Answer:
false
Explanation:
Waves are created because othe the lunar pull with out the moon we wouldnt have waves
pls help because im not smart.-.
Answer:
Im not smart either but im pretty sure its D because its a pie chart so its asking how many and pie charts tell you how much something has
Explanation:
Approximately what percentage of a human's DNA is used for coding Information for the synthesis of proteins?
O 5%
O 25%
О 99%
O 95%
One percent of a human's DNA is used for coding Information for the synthesis of proteins.
What is DNA?
DNA is a hereditary material which is present in human beings as well as all other living organisms. Every cell which is present in an organism's body has DNA which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.
Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.
DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule and a phosphate group. A base, phosphate sugar are together called as nucleotides.
Learn more about DNA,here:
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Your question is incomplete, but most probably your full question was,approximately what percentage of a human's DNA is used for coding Information for the synthesis of proteins?
5%
25%
99%
95%
1%
Which of the following are behaviors of a gas that can be explained by the kinetic-molecular theory?
a. Gases are compressible.
b. Gases exert pressure.
c. All particles of a gas sample move at the same speed.
d. Gas particles can exchange kinetic energy when they collide.
e. Gas particles move in a curved-line path.
Answer:
b,c,d
Explanation:
gasses exert pressure, all particles of a gas sample move at the same speed. gas particles can exchange kinetic energy when they collide.
A chemical formula is shown the subscription in a chemical formula represent the
Answer:
A, option is the correct answer of this question
A dry cleaning solvent (molar mass = 146.99 g/mol) is a compound containing C, H & Cl is suspected to be a cancer causing agent. When a 0.250g sample was studied by combustion analysis, it was found that 0.451g of CO2 and 0.0617g of H2O were produced. From this data determine the empirical and molecular formula of the dry cleaning agent.
Answer:
Okay so set up an equation for what's happening
_C + _H + _Cl + O2 --> _CO2 + _H2O
0.451g of CO2. Convert to moles by using the molar mass of CO2 which is 44 g/mol. Now look at the ratio between Carbon and Oxygen in CO2. It's 1C:2O You just want to find C.. so do the number of moles CO2 and multiply it by 1 since the ratio says 1 carbon atom. Now you have moles of carbon. Put this number aside for later.
Do the same thing with H2O. Convert to moles by using the molar mass of H2O which is 18 g/mol. Now look at the ratio between Hydrogen and Oxygen. It's 2H:1O You just want H.. so do the number of moles of H2O and multiply it by 2 since there's 2 hydrogen atoms. Now you have the moles of hydrogen & put this number aside for later
Lastly, you need to find the chlorine. uuhhh I cant figure this part out
Explanation: ..
I hope I helped lol!
When sodium (Na1+) and oxygen (O2-) combine, the resulting formula will be what
Answer:Na2O
Explanation:
When sodium and oxygen combine, the resulting chemical formula will be Na₂O.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
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What are the names of the particle that contribute to the mass number of an atom?
Answer:
Only protons and neutrons contribute to an atom's mass value
Explanation:
Please answer this question please brianlest
Answer:
Explanation:
non-living things do not posses any thoughts, ideas, feelings, or senses. they do not breathe, eat, grow, reproduce, or have any senses. they differ because a non-living things isn't alive and cannot function in this world.
Answer:
The term living thing refers to things that are now or once were alive. A non-living thing is anything that was never alive. In order for something to be classified as living, it must grow and develop, use energy, reproduce, be made of cells, respond to its environment, and adapt.
Explanation:
your welcome
Which type of force is the magnet using to move the nail?
A nail moving towards a magnet
A) Friction
B) Gravity
C) Pull
D) Push
Answer:
a
Explanation:
Answer:
Explanation:
gravity
SO IM DOING A SCIENCE FAIR PROJECTABT BATH BOMBS AND I NEED NAMES CAN YOU GUYS DROP NAME IDEAS FOR MY PROJECT PLEASEE
ITS ABOUT BATH BOMBS
BATH BOMB 1
BATH BOMB 2 WILLLLLLLLLLLL
HOPE I HELPED UWU
BATH BOMB 3
BATH BOMB 4
The molecules in a gas
Answer:
? which gas, explain further
Explanation:
which model of the atom is most accurate?
Answer:
it's the electron cloud model
