Explanation:
M = molar mass
p= percentage abundance
[tex]rel.atm.mass = \frac{ M1p1 + M2p2 + M3p3}{100} \\ r.a.m = \frac{24 \times 78.99 + 25 \times 10 + 26 \times 11.01}{100} \\ r.a.m = \frac{1895.76 + 250 + 286.26}{100} \\ = \frac{2432.02}{100} \\ 24.32[/tex]
BRAINLIST
In an ionic compound, the total positive charge of all the positive ions ____ the total negative charge of all the negative ions.
Answer:
I think it would be 0 since cations and anions must always combine in such a way so that their charges cancel.
explain why heating a solution increases the solubility of a solute
[tex] \: \: \: \: \: [/tex]
The addition of more heat facilitates the dissolving reaction by providing energy to break bonds in the solid. This is the most common situation where an increase in temperature produces an increase in solubility for solids.hope it helps[tex] \: \: \: \: \: \: [/tex]
What is collision theory?
A.a theory stating that reactants must collide with products in order for a chemical reaction to occur
B.a theory stating that there must be minimal kinetic energy between products for a chemical reaction to occur
C.a theory stating that a chemical reaction occurs only when reactants strike each other at the correct orientation and with sufficient kinetic energy
D.a theory stating that a chemical reaction occurs only when reactants are placed in separate containers and the containers are then placed close together
Answer:
A
Explanation:
collision theory is a theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another
Select the atom that will attract the electron pair (:) more strongly (the atom with the greater electronegativity)
HELP PLEASE
How many total atoms of Nitrogen are shown in the formula below?
4N₂O
2
4
6
8
Answer:
8
EXPLANATION hope this helps you
Answer:8
Explanation:
are most of the elements on the periodic table classified as a metal or a non-metal?
Answer:
Metals
Explanation:
There are more metals next time trying checking the table they will be in colored squares to count to see which has more! HOPE THIS HELPED!
<3 :D
Can i get help im not really good at science
Answer:
Cause and effect, easy.
Which does ionic bonding involve?
8. In an ionic bond, electrons are
electrons are
while in a covalent bond,
?
Answer:
in covalent bond electrons are shared by atoms
in a battery that uses a licoo2 cathode approximately 50% of the lithium migrates from the cathode to the anode on charging. in a battery that uses a limn2o4 cathode what fraction of the lithium in limn2o4 would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode?
Answer:
92.4%
Explanation:
Assume 100g of the cathode material. The LiCoO2 cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55g Li migrates. 100g of the LiMn2O4 cathode contain 3.84g of Li. The fraction of lithium in LiMn2O4 that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:
(3.55g/ 3.84g ) * 100% = 92.4%
From electrolysis, 92.4% would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode.
What is electrolysis?
Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.
Assume 100 g of the cathode material. The LiCoO₂ cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55 g Li migrates. 100 g of the LiMn₂O₄cathode contain 3.84 g of Li. The fraction of lithium in LiMn₂O₄ that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:(3.55 g/ 3.84 g ) × 100% = 92.4%
Learn more about electrolysis,here:
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#SPJ2
a) C8H18
Name the organic compound
Answer:
Explanation:
Octane
Octane is a straight chain alkane composed of 8 carbon atoms.
what are valence electrons? why are they so important in chemistry?
Answer:
Valence electrons are negatively charged particles located in the outermost shell of atoms that can be transferred or shared with other atoms. Valence electrons are important in chemistry because the number of valence electrons in a particular atom can be used to determine how the atom will react chemically with other atoms.
At what point on a heating curve graph does a phase change occur?
at each plateau
at the first plateau
at each slope
at the last slope
Answer:
Electrical Bonding Investigation Data Quick Check
Explanation:
B. Heat energy is added to the substance, weakening the electrica attraction between molecules.
C. Both the melting point and boiling point are lower
C. The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a particle negative charge, while the hydrogen atom have particle positive charges
D. Phase change
C. At each plateau
which of the following elements forms coloured compounds. A. Normal B. Transition C. Lanthanicles D. Inner transition
Answer:
B. Transition
Explanation:
Transition elements form coloured compounds because they have unfilled d orbitals.
Which statements accurately describe elements? Check all that apply.
Elements are made up of two or more types of atoms.
Elements are made up of only one type of atom.
Each element has a unique chemical symbol.
Elements can be identified by their atomic number.
One element cannot be combined with another element.
Answer:
Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.Explanation:
N2 + O2 → N205
how do i show my work im trying to balance the equation
Answer:
2N2 + 3O2 –2N2O3 this what I got balancing though
why does it make sense for the valence electrons to increase going across a period?
A solid magnesium flare has a mass of 1300 g and a volume of 743 cm3. What is the density of the magnesium?
Answer:
1.74 g/cm3
Explanation:
density=mass/volume
Explanation:
density = 1300/743
or density=1.74g/cm3
Which physical adaptation increases an organism's chances of finding a suitable habitat?
the long legs of wading birds
the croak of frogs
the quills of a porcupine
the venom of snakes
The physical adaptation among the option that increases an organisms
chances of finding a suitable habitat is the long legs of wading birds
An adaptation is a characteristic that helps an animal survive in its habitat.
Any animal who successfully survives on land or water must have behavioural
and physical trait or attributes or adaptation that assist it to achieve those
goals.
This physical adaptation might be body growth, body covering during
weather change, body functioning or even body parts.
The physical adaptation among the option that increases an organisms
chances of finding a suitable habitat is the long legs of wading birds.
The long legs of wading birds assist them to find a suitable habitat. The long
legs can move through shallow water without wetting their feathers.
There long leg give them better eye sight to search for food and suitable
habitats.
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EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)
Answer:
Adding on to the answer said before, microscopes are pretty much one of the most significant tools used in Biology. It helped discover organelles, and smaller stuff like DNA, and prominently allowed Scientists to discover Bacteria and Archaea, the prokaryotic cells that contribute a big role in the functioning of soil, which is essential for our ecosystem.
Write a Claim based in this question: What happens in the atmosphere and how
is it related to the water cycle.
Answer:
The atmosphere is the superhighway in the sky that moves water everywhere over the Earth. Water at the Earth's surface evaporates into water vapor which rises up into the sky to become part of a cloud which will float off with the winds, eventually releasing water back to Earth as precipitation.
Explanation:
If you don't want to plagiarize change it up a bit.
A clear liquid in an open container is allowed to evaporate. After three days, a solid is left in the container. Was the clear
liquid an element, a compound, or a mixture?
The liquid did not chemically bond after 3 days, therefor it is a mixture.
Hope this helps!
What happens to the speed of the particles of the physics book?
Answer:
the physics book particales speed up and when you move the chemistry book
Answer:
The speed of the particles of the physics book increases when the chemistry book slides across the physics book.
Explanation:
i got it right when i did this
Can someone answer that first this pls im lost
One of the following is not a property of metals
а
high malleability
ь
high compressibility
с
high melting point
d
high ductility
Answer:
option b
Explanation:
high compressibility is not a property of metal.
What type of bond would be formed between hypothetical elements X and Y in the the compound XY based on their electronegativity difference?
A. Nonpolar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7
B. Nonpolar covalent because the difference in electronegativity is greater than 1.7
C. Polar covalent because the difference in electronegativity is greater than 0.4, but
less than 1.7
D. lonic because the difference in electronegativity is greater than 0.4, but less than
1.7
The bond is polar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7.
Electronegativity refers to the ability of an atom in a compound to attract the electrons of the bond towards itself. It is a periodic trend that increases across the period but decreases down the group.
The electronegativity difference between the two atoms as shown in the question is 1.55. This means that the bond is polar covalent because the difference in electronegativity is greater than 0.4, but less than 1.7.
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how long does it take cream cheese to get to room temperature?
Since cream cheese has such a high fat content, it doesn't take long to come to room temperature if the room is relatively warm. It takes about thirty minutes on the counter to soften significantly, and about an hour to fully come to room temperature again, depending on the temperature outside and in your kitchen
what will you observe when you open a bottle of concentrated hydrochloric acid?
Answer:
Strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke.
Explanation:
#followformore
Hope this helps :)
A wave is moving towards shore with a velocity of 5.0 MS if it’s frequency is 2.5 Herz what is the wave length
Answer:
2 mExplanation:
The wavelength of a wave can be found by using the formula
[tex]\lambda = \frac{c}{f} \\[/tex]
where
c is the speed of the wave
f is the frequency
From the question
c = 5 m/s
f = 2.5 Hz
We have
[tex] \lambda = \frac{5}{2.5} = 2 \\ [/tex]
We have the final answer as
2 mHope this helps you
During ionization, metals lose electron, this change is called?
Ans
This is called oxidation
Explanation:
the oxidation number of a metal ion is more than the oxidation number of metal atom